KR101390668B1 - forest soil carbon model - Google Patents

Abstract

The present invention relates to a method for modeling forest soil carbon, the method comprising the steps of modeling forest soil carbon using limb biomass, dead organic matter production amount, and dead organic matter decomposition amount, Calculating the amount of carbon in the forest using the change in biomass, calculating the amount of carbon in the first dead organic matter by using the amount of dead organic matter according to the yearly mortality rate of the tree, And calculating the amount of carbon in the second dead organic matter to simulate and predict the behavior of forest soil carbon.

Description

Forest soil carbon model {Forest soil carbon model}

The present invention relates to a forest soil carbon model, and more particularly, to a method for modeling forest soil carbon so as to simulate and predict the dynamics of forest soil carbon using the livestock biomass, the dead organic matter production amount and the dead organic matter decomposition amount will be.

Global warming is becoming a global problem as environmental concerns are increasing. Global warming is caused by an increase in the concentration of greenhouse gases in the atmosphere, including carbon dioxide. The invention of a method to reduce carbon dioxide is also important, but it is necessary to understand and manage the carbon storage and circulation of the earth which generates carbon dioxide accurately. Understanding the Earth's carbon storage and recycling is the basis for climate change mitigation and adaptation.

Carbon storage and circulation may be different depending on the soil and climate environment. Therefore, carbon accounting is required at the national level. In countries where the forest area is as high as Korea, accurate quantification of forest soil carbon is very important.

(1993), RothC (Coleman & Jenkinson, 1999) or Sim-CYCLE (Ito & Oikawa, 2003) in the United States Have been studied and used.

The first problem to be solved by the present invention is to provide a method for producing a forest soil carbon model capable of simulating and predicting the dynamics of forest soil carbon.

It is another object of the present invention to provide a computer-readable recording medium storing a program for causing a computer to execute the above-described method.

In order to solve the above first problem, the present invention provides a method for modeling forest soil carbon using the limb biomass, the dead organic matter production amount, and the dead organic matter decomposition amount, Calculating the amount of carbon in the forest using the change, calculating the amount of carbon in the first dead organic matter by using the amount of dead organic matter according to the yearly mortality rate of the tree, and calculating the amount of carbon in the first dead organic matter, And calculating a carbon content in the dead organic matter.

According to an embodiment of the present invention, the step of calculating the amount of carbon in the forest may include the steps of calculating stem mass per unit area using stem material per unit area and wood basic density, using the stem mass per unit area and the conversion factor Calculating the mass per unit area of the branches, leaves, main roots, and fine roots, and calculating the amount of carbon in the forest according to the mass, area, and in-vivo carbon concentration per unit area of each site , And the staple count per unit area is calculated using the position index and the genders.

According to another embodiment of the present invention, the step of calculating the amount of carbon in the first dead organic matter may include calculating the amount of carbon in the stem of the previous time, the mortality rate of the stem, And the carbon content in the above-ground dead wood per unit hour is calculated by using the decomposition coefficient of the carbon in the above-ground dead wood and the dead wood dead wood at the previous time, , Calculating the increase in the amount of carbon in the leaves using the amount of carbon in the leaves at the previous time and the rate of decay of the leaves and using the carbon content in the leaves and the decomposition coefficient of the leaves in the previous time, Calculating the amount of carbon change in the litter per unit time by calculating the decrease in the amount of carbon in the main time, Calculating the amount of carbon in the underground dead wood per unit time by calculating the decrease in the amount of carbon in the underground dead wood using the carbon content in the underground dead wood and the decomposition coefficient of the underground dead wood in the previous time, The amount of carbon in the fine roots was calculated by using the amount of carbon in the fine roots of the time and the ratio of the fine roots of the fine roots. The carbon content in the roots of the roots and the decomposition coefficient of roots of the roots Calculating a carbon change amount of the dead fine roots per unit time, and calculating a carbon amount in the first dead organic matter by using the calculated carbon change amount per unit time of the ground dead dead wood, the leaves, the ground dead wood, and the dead wood roots Step < / RTI >

According to another embodiment of the present invention, the step of calculating the amount of carbon in the second dead organic matter may include calculating the amount of carbon in the dead organic matter, which has been corroded using the carbon amount at the previous time, the atmospheric release ratio, By calculating the increase of the amount of carbon and calculating the decrease in the amount of carbon in the corroded dead organic matter using the carbon content in the dead organic matter that has been corroded in the previous time and the decomposition coefficient of the corroded dead organic matter, Calculating an amount of change and calculating an increase in the amount of carbon in the soil carbon according to the amount of carbon in the corroded dead organic matter at the previous time, the rate of air release relative to the carbon loss amount of the corroded dead organic matter, and the decomposition coefficient of the corroded dead organic matter , Calculating the reduction of the amount of carbon in the soil carbon by using the carbon amount in the soil carbon and the decomposition coefficient of the soil carbon in the previous time, Small Tan comprises the step of calculating the amount of change of the carbon and the soil, by the unit may be characterized in that the carbon content of the above-ground dead wood, leaves, below-ground dead wood, fine root mortality.

According to another aspect of the present invention, there is provided a computer-readable recording medium storing a program for causing a computer to execute a method for generating a forest soil carbon model using a living body biomass, a dead organic matter production amount, Media.

According to the present invention, it is possible to estimate the carbon stock amount and change in the forest soil by applying the obtained availability information to the model. In addition, predicted results from the model can help decision making for forest management. Furthermore, it can be used as a reliable assessment tool on forest carbon potential.

1 is a block diagram of a forest soil carbon model according to an embodiment of the present invention.
2 is a flow chart of a method for modeling forest soil carbon in accordance with one embodiment of the present invention.
3 is a flow chart of a method for modeling forest soil carbon in accordance with another embodiment of the present invention.
4 is a flow chart of a method for modeling forest soil carbon in accordance with an embodiment of the present invention.
5 is a flow chart of a method for modeling forest soil carbon in accordance with an embodiment of the present invention.
FIG. 6 is a diagram illustrating an entire module designed by using a modeling program as a method for modeling forest soil carbon according to an embodiment of the present invention.
FIG. 7 is a diagram illustrating each part of a module designed using a modeling program as a method for modeling forest soil carbon according to an embodiment of the present invention.

Prior to the description of the concrete contents of the present invention, for the sake of understanding, the outline of the solution of the problem to be solved by the present invention or the core of the technical idea is first given.

The method for modeling forest soil carbon according to one embodiment of the present invention is a method for modeling the forest soil carbon by using the biomass of the dead soil, the dead organic matter production amount, and the dead organic matter decomposition amount, , Calculating the amount of carbon in the first dead organic matter by using the amount of dead organic matter according to the yearly mortality rate of the tree and calculating the amount of decomposition of the annual dead organic matter To produce a carbon content in the second dead organic matter.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. It will be apparent to those skilled in the art, however, that these examples are provided to further illustrate the present invention, and the scope of the present invention is not limited thereto.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: It is to be noted that components are denoted by the same reference numerals even though they are shown in different drawings, and components of different drawings can be cited when necessary in describing the drawings. In the following detailed description of the principles of operation of the preferred embodiments of the present invention, it is to be understood that the present invention is not limited to the details of the known functions and configurations, and other matters may be unnecessarily obscured, A detailed description thereof will be omitted.

1 is a block diagram of a forest soil carbon model according to an embodiment of the present invention.

The atmospheric carbon is absorbed into the forest, moving along a constant path, and then circulating back to the atmospheric carbon. The portion containing carbon in the circulation process in the forest can be roughly divided into the forest cottages 110, the first dead organic carbon reservoir 120, and the second dead organic carbon reservoir 130. The first dead organic matter is a dead organic matter before the living tree is decomposed to a dead state, and the second dead organic matter is a dead organic matter having the first dead organic matter decolorized.

The forest carbon stock 110 refers to a living tree that stores carbon and includes a stem, a branch, a foliage, a coarse root, and a fine root ). Here, the main root may be a root having a diameter of 2 millimeters or more. Tree bark, and the like. The atmospheric carbon is stored in the forest carbon store 110 through photosynthesis. Since the forest is combined with the photosynthesis and respiration, carbon in the atmosphere is introduced into the forest carbon pool 110 through the net photosynthesis amount 112, and the net photosynthesis amount 110 becomes the accumulation amount of the annual forest biomass. The carbon in the forest stored in the forest carbon stock 110 is calculated by using the change in the forest biomass due to the volume change of the tree stem according to the ages.

More specifically, it is possible to calculate the mass per unit area of the forest carbon pool 110 and multiply the area of the forest soil carbon model by the area to which the forest soil carbon model is to be applied, thereby calculating the total forest biomass. Use the carbon concentration (%) of the forest to estimate. In order to calculate the mass per unit area of each site, the stem that occupies the largest part of the above-mentioned tree is used as a reference. The stem mass per unit area is calculated using the relational expression of stem diameter and stem diameter per unit area for each species and position index calculated using the table of stand index.

Using the Gibbs Fertz function, the stakes per unit area according to the dwelling according to the status index are shown in Equation 1 below.

[ Equation  One]

Strip material = a x exp (b x exp (c x gimp))

(a, b, c: constants according to position index)

The position index is an index of the degree of change in the standing biomass according to the soil fertility. The stationary harvesting table can be derived by converting the data on the stationary harvest table developed by the National Forestry Academy into a series of data using the Gombertz function. Extrapolations can be made in the unexpected part of the scope of the data (for example, 20 years or less or 80 years or more). The site index can be calculated from the discontinuous data 140 of FIG. 1A and can be derived as a continuous function graph 150. FIG.

The stiffness per unit area of the pine tree according to the rank index derived from the stand index of the National Forestry Academy is shown in Equation 2 below.

[ Equation  2]

Position index 10: Stack register = 182.8 x exp (-7.7292 x exp (-0.0902 x gang))

Position index 12: Stem count = 231.5 x exp (-8.7470 x exp (-0.0954 x gang))

Position index 14: Stack register = 285.6 x exp (-9.5535 x exp (-0.0991 x gang))

Position index 16: Stem register = 345.0 x exp (-10.1960 x exp (-0.1018 x gang))

(Unit of m3 / ha, unit of annual salary)

The stem mass per unit area can be calculated as shown in the following Equation 3 using the stem material per unit area and the wood basic density.

[ Equation  3]

Stem mass per unit area (ton / ha) = Stack volume per unit area (m3 / ha) x Wood basic density (ton / m3)

Using the stem mass per unit area and the biomass conversion factor, the stem mass per unit area is calculated according to the following equation (4).

[ Equation  4]

Branching mass per unit area = stem mass per unit area x branching branching conversion factor

Leaf mass per unit area = stem mass per unit area x leaf stem conversion factor

Root mass per unit area = stem mass per unit area x biomass conversion factor over ground x root ratio to overland area

The main muscle mass per unit area and the fine mass per unit area can be calculated according to the ratio of main muscle to fine muscle. According to the data from the Korean Forest Research Institute, the branch / stem conversion factor for pine trees is 0.242, the leaf / stem conversion factor is 0.084, and the root / ground conversion factor is 0.0259. The mass of fine roots is 0.94 percent of the total surface area.

The amount of carbon in the forest stored in the carbon stocker 110 in the forest can be calculated using the mass per unit area, total area, and carbon concentration of each site. The carbon concentration may be 50 percent (%). Internationally, 50 percent of the carbon concentration in wood is being used. The carbon concentration may be between 45 and 55 percent, depending on the environment.

The carbon stored in the woody carbon pool 110 is moved to the first dead organic carbon pool 120 by cutting off each part of the forest. The first mortal organism is composed of the upper ground woody debris (AWD), the fallen leaves (LTR, letter), the lower ground woody debris (BWD) And fine dead roots (DFR). The amount of carbon in the first dead organic matter deposited in the first dead organic carbon storage tank 120 is calculated by using the production amount of dead organic matter according to the annual mortality rate of the tree.

More specifically, the amount of carbon in the first dead organic matter is calculated by subtracting the amount of carbon entering from the in-wood carbon storage tank 110 and the amount of carbon released from the first dead organic carbon storage tank 130 . In order to calculate the amount of carbon stored in the first dead organic matter carbonaceous reservoir 120, the amount of carbon flowing into the woody carbonaceous reservoir 110 is calculated using the amount of carbon in the forest and the rate of mortality according to the site of the tree, The amount of carbon released to the second dead organic matter carbon storage tank 130 is calculated by calculating the amount of decomposition of carbon in the organic matter.

In order to calculate the amount of carbon flowing into the first dead organic matter carbonaceous reservoir 120 from the forest carbon pool 110, the mortality rate is used for each site. The mortality rate may include stem and root mortality rate 122, branch mortality rate 123 and leaf mortality rate 124. In the stem and root mortality rate 122, , And fine-grained fragility can be used. Also, in order to calculate the amount of carbon discharged from the first dead organic matter carbon storage tank 120 to the second dead organic carbon storage tank 130, the decomposition coefficient of the dead wood dead wood, leaves, under dead wood deadwood, and dead wood root is used.

The amount of carbon change per unit time in the first dead organic matter carbon storage tank 120 is expressed by the following equation (5).

[ Equation  5]

Carbon change of ground dead wood (AWD) was higher than that of previous time (Stem _{t -1} ), stem mortality rate (M _STM ), previous time branch carbon (Branch _{t -1} ) (ST), self-thinning, and the decrease in carbon content by the decomposition coefficient (k _AWD ) of carbon in the upper dead wood (AWD _{t -1} ) and the ground dead wood The carbon change (dAWD _t / dt) of dead wood per hour can be calculated. Leaves (LTR) of the carbon amount of change is an increase in the mortality rate due to carbon (LF, Litterfall) within carbon (Foliage _{t -1)} and the blades in the previous time, previous time, a small amount of carbon in the leaves (LTR _{t - 1),} it is possible to calculate the change in carbon (dLTR _t / dt) per unit time leaves by calculating the decrease in the degradation factor (a k _LTR) carbon by leaves. Below-ground variation in the dead wood carbon (BWD) is the increase of carbon content according to the previous time, main bars in carbon content (CoarseRoot _{t -1)} and mortality (M _CRT) of the stem of a small amount of dead wood below-ground burnt in the previous time _(t BWD ₁₎ and by calculating the decomposition coefficient (k _BWD) carbon amount of reduction due to the below-ground dead wood, it is possible to calculate the change in carbon (dBWD _t / dt) per unit time of the below-ground dead wood. The amount of carbon change in DFR was increased by the amount of carbon in fine roots (FineRoot _{t- 1} ) and fine roots (M _FRT ) at the previous time and the amount of carbon in DFR _t by calculating _a-1) and apoptosis fine root decomposition coefficient (k _DFR) carbon amount of reduction due to a, it is possible to calculate the change amount of carbon (dDFR _t / dt) per unit time of the fine root mortality. The decomposition coefficient (k _i ) of each unit carbon pool can be obtained by the decomposition ratio (c _i ) and the time (t).

The amount of carbon in the first dead organic matter can be calculated by calculating the amount of carbon change per unit time of each unit carbon pool, and then applying the time.

The carbon of the second dead organic carbon storage 130 flows from the first dead organic carbon storage 120 due to the decomposition of the first dead organic matter, and the dead organic material is converted into soil carbon through the corrosion decomposition process. And the carbon in the forest is circulated.

More specifically, the first dead organic matter is decomposed by the unit carbon storage pool of the first dead organic carbon reservoir and converted into the second dead organic matter. The second hazardous organic matter contains corrosive dead organic matter (HUM, humus) and soil carbon (SOC), and may further divide carbon pools with corroded dead organic matter and soil carbon.

The corroded dead organic matter calculated the increase of the amount of carbon in the corroded dead organic matter by using the amount of carbon in the first dead organic matter carbon storage unit, the amount of carbon lost to atmosphere, and the decomposition coefficient, The carbon change amount of the dead organic matter that has been corroded per unit time can be calculated by calculating the reduction in the amount of carbon in the corroded dead organic matter by using the carbon content in the dead organic matter and the decomposition coefficient of the corroded dead organic matter. The amount of carbon in which the first dead organic matter decomposes, the amount of carbon introduced into the soil carbon by the corrosion decomposition of the corroded dead organic matter, and the amount of carbon released into the atmosphere during the decomposition process are totaled to calculate the carbon change amount of the corroded dead organic matter Which is shown in Equation (6).

[ Equation  6]

The amount of carbon stored in the previous time (the AWD _{t -1 for} ground top dead stock, LTR _{t -1 for} dead leaves, BWD _{t -1 for} underground dead wood, DFR _{t -1 for} dead wood root), the atmospheric release rate (E _AWD ), deciduous silver (E _LTR ), underground dead wood (E _BWD ), dead wood (E _DFR )) and decomposition coefficients (k _{AWD at the top} dead wood, k _{LTR at the} deciduous wood, k _BWD , apoptosis fine root _DFR k) used to calculate the increase of carbon content of the corrosion test, and the organic matter, a small amount burnt in the corrosion dead organic matter from the previous time (HUM _{t -1)} as a function of the corrosion degradation dead organic matter (k _HUM ) Is used to calculate the amount of carbon change (dHUM _t / dt) of dead organic matter that has been corroded per unit time by calculating the decrease in carbon content of corroded dead organic matter.

The carbon contained in the corroded dead organic matter is converted to soil carbon through the corrosion decomposition process. Soil carbon is the carbon contained in the soil itself, not the dead organic matter. It is the carbon contained in the dead organic matter that was corroded at the previous time, the rate of air release to the carbon loss of the corroded dead organic matter and the decomposition coefficient of corroded dead organic matter. The amount of carbon in the soil carbon per unit time is calculated by calculating the decrease in the amount of carbon in the soil carbon by using the amount of carbon in the soil carbon and the decomposition coefficient of the soil carbon in the previous time. This is shown in Equation (7).

[ Equation  7]

Small amount burnt in the corrosion test of the previous time, organic matter (HUM _{t -1),} carbon loss compared to atmospheric release rate of the corroded dead organic matter (E _HUM), and the decomposition coefficient (k _HUM) increases a small amount of carbon in soil using a And the carbon change in the soil carbon per unit hour is calculated by calculating the reduction of the carbon content in the soil carbon by using the amount of carbon in soil carbon (SOC _{t -1} ) and the decomposition coefficient of soil carbon (k _SOC ) dSOC _t / dt). Experimentally, it can be seen that 83 percent of the carbon is released into the atmosphere during the decomposition process.

The amount of carbon in the second dead organic matter carbonaceous reservoir is calculated using the amount of carbon change of the dead organic matter eroded per unit time and the amount of carbon change in soil carbon per unit time.

Carbon stocks can be initialized to apply this forest soil carbon model. Initialization of the carbon stock may be done to simulate future soil carbon stock changes or to estimate the current soil carbon stocks. For initialization, a few assumptions are needed. It may be necessary to assume that past forest growth patterns are the same as at present, assuming that soil carbon uptake has reached equilibrium at initialization, and that there has been no disturbance in the past. By setting the values of all carbon pools to zero according to the initialization and simulating them according to the given conditions, it is possible to simulate how the soil carbon is circulated until it reaches a stable state.

As described above, the forest soil carbon model is divided according to the order in which the carbon is circulated in the forest by the timber carbon pool 110, the first dead organic carbon pool 120, and the second dead organic carbon pool 130, The amount of carbon stored in each reservoir can be simulated and predicted using the accumulated amount (111), dead organic matter production amount (121), and dead organic matter decomposition amount (131). By using the forest soil carbon model, it is possible to understand how carbon circulates in the forest, and this information can be used to efficiently plan and manage forest soil carbon.

The forest soil carbon model according to the present invention is suitable for the Korean type forest soil carbon model and can be designed using the results of the timber exploitation table and the forest carbon account developed by the National Forestry Academy for Korean forests.

2 is a flow chart of a method for modeling forest soil carbon in one embodiment of the present invention.

Step 210 is a step of calculating the amount of carbon in the forest using the variation of the standing biomass due to the volume change of the stem stem according to the ages.

More particularly, the present invention provides a method for producing a forest soil carbon model using a limestone biomass, a dead organic matter production amount, and a dead organic matter decomposition amount, wherein the forest soil carbon model includes a carbon amount in the forest, a carbon amount in the first dead organic matter, It is generated by calculating the amount of carbon in the second dead organic matter, and this step is a step of calculating the amount of carbon in the forest. A detailed description of this step corresponds to the description of the forest carbon pool 110 of FIG. 1 and is replaced with the description of the forest carbon pool 110 of FIG.

Step 220 is a step of calculating the amount of carbon in the first dead organic matter using the production amount of dead organic matter according to the annual mortality rate of the tree.

More specifically, the carbon in the wood in step 210 is a first dead organic matter when each part of the wood is dead, and the carbon amount in the first dead organic matter is calculated. Here, the first dead organic matter refers to dead organic matter before the tree is broken down and decomposed. A detailed description of this step corresponds to a detailed description of the first dead organic carbon reservoir 120 of FIG. 1 and is replaced by a detailed description of the first dead organic carbon reservoir 120 of FIG.

Step 230 is a step of calculating the amount of carbon in the second dead organic matter using the decomposition amount of dead organic matter per year.

More specifically, in step 220, the dead organic matter decayed by the wood is decomposed by the microorganisms in the forest over time, the amount of carbon when the first dead organic matter is decomposed to become the second dead organic matter is calculated, It is the step of calculating the amount of carbon in the soil carbon as the dead organic matter moves to the soil carbon through the corrosion decomposition process. A detailed description of this step corresponds to a detailed description of the second dead organic carbon reservoir 130 of FIG. 1 and is replaced by a detailed description of the second dead organic carbon reservoir 130 of FIG.

3 is a flow chart of a method for modeling forest soil carbon in another embodiment of the present invention.

Step 310 is a step of calculating the stem mass per unit area using the stem densities per unit area and the wood basic density.

More specifically, in order to calculate the amount of carbon in the forest, the stem mass per unit area is first calculated using the stem material per unit area and the wood basic density. The staple count per unit area can be calculated by using the status index and the ordinance. A detailed description of this step corresponds to a description of a method of calculating the stem mass per unit area of the timber carbon stock 110 of FIG. 1, and is replaced with a description of the timber carbon stock 110 of FIG.

Step 320 is a step of calculating mass per unit area of branches, leaves, main roots, and fine roots using the stem mass per unit area and the conversion factor.

More specifically, the mass per unit area of the leaf, main muscle, and fine root is calculated by applying a conversion coefficient to the stem mass per unit area calculated in step 310. [ The detailed description of this step corresponds to the explanation of the method of calculating the mass per unit area of each part of the timber of the timber carbon pool 110 of FIG. 1, and the description of the timber carbon pool 110 of FIG. 1 Instead.

Step 330 is a step of calculating the amount of carbon in the forest according to each site using the mass per unit area, the area, and the carbon concentration in vivo.

More specifically, steps 310 to 320 are calculated by calculating the mass per unit area of each part of the tree, and do not mean the amount of carbon in the forest. Therefore, in order to calculate the amount of carbon in the forest, The amount of carbon in the forest is calculated using mass, area, and in-vivo carbon concentration per unit area of each site. A detailed description of this step corresponds to a description of a method for calculating the amount of carbon in the forest of the forest carbon pool 110 of FIG. 1, which is replaced with a description of the forest carbon pool 110 of FIG.

4 is a flow chart of a method for modeling forest soil carbon in an embodiment of the present invention.

Step 410 is a step of calculating the amount of carbon change in the above-ground dead wood per unit time using the carbon content in the stem, the mortality rate of the stem, the carbon content in branches, the branching rate of the branches, the carbon content in the dead wood dead wood, .

More specifically, the first dead organic matter includes dead grass dead wood produced by cutting off stems and branches, leaves produced by cutting leaves, dead wood deadwood produced by dead wood cutting, and dead wood roots produced by cutting fine roots. To calculate the amount of carbon in the first dead organic matter, the amount of carbon change per unit time of each unit is calculated. In this step, the amount of carbon change per unit hour of dead wood is calculated. The amount of carbon flowing into the dead wood and the amount of carbon released from the dead wood are calculated. A detailed description of this step corresponds to a description of a method for calculating the amount of change in carbon per unit time of the dead dead wood of the first dead organic carbon pool 120 of FIG. 1, wherein the first dead organic carbon carbon pool 120 ).

Step 420 is a step of calculating the amount of carbon change in litter per unit time using the carbon content in the leaves, the rate of leaf fading, the amount of carbon in the leaves, and the decomposition coefficient of the leaves.

More specifically, the amount of carbon change per unit time of the leaves produced by foliage of the first dead organic matter unit is calculated. The amount of carbon entering the fallen leaves and the amount of carbon released from the fallen leaves are calculated. The detailed description of this step corresponds to a description of a method for calculating the amount of change in carbon per unit time of the leaves of the first dead organic matter carbon storage tank 120 of FIG. 1, wherein the first dead organic carbon storage tank 120 of FIG. As a substitute for the explanation.

Step 430 is a step of calculating the amount of carbon change in the underground dead wood per unit time by using the amount of carbon in the main stream, the rate of cracking in the main stream, the amount of carbon in the underground dead wood, and the decomposition coefficient of the underground dead wood.

More specifically, the amount of change in carbon per unit time of the dead wood deadwood produced by scouring the main peak among the units of the first dead organic matter is calculated. The amount of carbon flowing into the underground dead wood and the amount of carbon released from the dead wood underground are calculated. A detailed description of this step corresponds to a description of a method for calculating the amount of carbon change per unit time of the dead dead wood of the first dead organic carbon pool 120 of FIG. 1, wherein the first dead organic carbon carbon pool 120 ).

Step 440 is a step of calculating the amount of carbon change of dead roots per unit time using the carbon content in fine roots, the rate of fine roots, the amount of carbon in roots, and the decomposition coefficient of roots.

More specifically, the amount of change in carbon per unit time of the fine roots of fine roots produced by roughening fine roots among the units of the first roasted organic matter is calculated. Calculate the amount of carbon flowing into the core and the amount of carbon released from the core. A detailed description of this step corresponds to a description of a method for calculating the amount of change in carbon per unit time of the fine roots of the first dead organic carbon reservoir 120 of FIG. 1, wherein the first dead organic carbon reservoir 120 ).

Step 450 is a step of calculating the amount of carbon in the first dead organic matter using the change amount of carbon per unit time of dead dead wood, fallen leaves, under dead dead wood, and dead wood fine roots.

More specifically, the step of calculating the amount of carbon in the first dead organic matter by using the period to be applied to the carbon change amount per unit time of each unit of the first dead organic matter calculated in steps 410 to 440. A detailed description of this step corresponds to a description of a method for calculating the amount of carbon in the first dead organic carbon reservoir 120 of FIG. 1, and the description of the first dead organic carbon reservoir 120 of FIG. 1 Instead.

5 is a flow chart of a method for modeling forest soil carbon in an embodiment of the present invention.

Step 510 is a step of calculating the amount of carbon change of dead organic matter per unit time by using the carbon amount of each unit, the rate of air release relative to the amount of carbon loss, the decomposition rate, the amount of carbon in the corroded dead organic matter and the decomposition coefficient of the corroded dead organic matter to be.

More specifically, when the first dead organic matter is decomposed, it becomes the second dead organic matter, and the amount of carbon in the second dead organic matter is calculated. The second dead organic matter can be divided into two stages. The first dead organic matter begins to be decomposed, and the soil carbon which is transformed during the corrosion decomposition of the corroded dead organic matter. In this step, the amount of carbon change of the corroded dead organic matter in the two steps is calculated. The amount of carbon per unit may be the amount of carbon in the ground dead wood, the leaves, the underground dead wood, and the dead wood. The carbon change amount of the dead organic matter that has been corroded is calculated using the carbon amount of each unit. A detailed description of this step corresponds to a description of a method for calculating the amount of carbon change in the corroded dead organic matter of the second dead organic carbon reservoir 130 of FIG. 1, and the second dead organic carbon reservoir 130 ).

Step 520 is a step of calculating the amount of carbon change in the soil carbon per unit time using the amount of carbon in the corroded dead organic matter, the air release ratio to the carbon loss amount, and the decomposition coefficient, the carbon content in the soil carbon, and the decomposition coefficient of the soil carbon.

More specifically, the amount of carbon change per unit time of the soil carbon in the second dead organic matter is calculated. A detailed description of this step corresponds to a description of a method for calculating the amount of carbon change in the soil carbon of the second dead organic carbon reservoir 130 of FIG. 1, Instead,

Step 530 is a step of calculating the amount of carbon in the second dead organic matter using the carbon change amount of the dead organic matter that has been corroded per unit time and the carbon change amount in the soil carbon.

More specifically, the amount of carbon in the second dead organic matter is calculated using the amount of change in carbon per unit time calculated in steps 510 to 520. A detailed description of this step corresponds to the description of the second dead organic carbon reservoir 130 of FIG. 1 and is replaced with the description of the second dead organic carbon reservoir 130 of FIG.

FIG. 6 is a diagram illustrating an entire module designed by using a modeling program as a method for modeling forest soil carbon in an embodiment of the present invention.

STELLA 9.1, isee system in the modeling program can be used to design a forest soil carbon model. To apply the forest soil carbon model, initial data are initialized under certain conditions and simulate and predict dynamics until the soil carbon is stabilized. The design of the front part is an initialization module 610 for initialization, and the AWD, the LTR, the BWD, and the DFR are designed as the units of the first dead organic matter, (HUM) and soil carbon (SOC) corresponding to the second dead organic matter.

FIG. 7 is a diagram illustrating each part of a module designed by using a modeling program as a method for modeling forest soil carbon in an embodiment of the present invention. FIG.

Each module that is redundantly applied to the soil carbon model can be designed first. The module includes a time module 710, a timber growth module 720, a growth module for each forest part 730, a decomposition module 740, - dead organic matter phone module, 750), and can be designed using each factor as shown in FIG. In addition, it is possible to easily estimate the change and obtain the result using a parameter controller and a module capable of outputting a simulated result value (graph or table).

The forest carbon soil model according to the embodiment of the present invention can be implemented through a processor capable of driving an operating system and processing a series of arithmetic operations and a memory required for such arithmetic operations, A controller that can appropriately control data processing between the storage space and the storage space may be utilized. The processor, the memory space, and the controller may be appropriately selected by a person skilled in the art in consideration of the utilization environment or the operating environment of the technical field to which the present invention belongs. Further, this control process may also utilize additional software code for controlling the hardware illustrated above. In addition, the processor may include a carbon in-tree calculation unit, a first dead organic carbon calculating unit, and a second dead organic carbon calculating unit.

Embodiments of the present invention may be implemented in the form of program instructions that can be executed on various computer means and recorded on a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

As described above, the present invention has been described with reference to particular embodiments, such as specific elements, and specific embodiments and drawings. However, it should be understood that the present invention is not limited to the above- And various modifications and changes may be made thereto by those skilled in the art to which the present invention pertains.

Accordingly, the spirit of the present invention should not be construed as being limited to the embodiments described, and all of the equivalents or equivalents of the claims, as well as the following claims, belong to the scope of the present invention .

110: Limb bio-carbon storage
120: First critical organic carbon storage
130: Second critical organic carbon storage
610: Initialization module

Claims (6)

A method for modeling forest soil carbon using biomass, dead organic matter production, and dead organic matter decomposition amount,
Calculating the amount of carbon in the forest using the change of the standing biomass due to the volume change of the stem stem according to the ages;
Calculating the amount of carbon in the first dead organic matter using the production amount of the dead organic matter according to the mortality rate of the wood; And
And calculating the amount of carbon in the second dead organic matter using the decomposition amount of the dead organic matter,
The amount of carbon in the forest is composed of stem, branch, leaf, main muscle,
The step of calculating the amount of carbon in the first dead organic matter may include:
The increase in the amount of carbon in the ground dead wood was calculated by using the amount of carbon in the stem and the rate of damage of the stem calculated before the unit time and the rate of carbon in the branch and the branching rate calculated before the unit time, Calculating the amount of carbon change in the dead wood per unit time by calculating the decrease in the amount of carbon in the above-mentioned dead wood deadwood by using the decomposition coefficient of the carbon in the deadwood and the dead wood deadwood;
The amount of carbon in the leaves was calculated using the amount of carbon in leaf and the rate of leaf loss which were calculated before the unit hour, and the amount of carbon in the leaves was calculated by using the amount of carbon in the leaves and the decomposition coefficient of leaves, Calculating a carbon change amount of the litter per unit time by calculating the decrease;
The amount of carbon in the underground dead wood was calculated by using the amount of carbon in the main metal and the rate of failure of the main steel which were calculated before the unit hour. Using the carbon content in the underground dead wood and the decomposition coefficient of the underground dead wood, Calculating a carbon change amount of dead wood deadwood per unit time by calculating a decrease in carbon content in the ground;
The amount of carbon in the fine roots was calculated using the amount of carbon in the fine roots and the rate of fine roots that were calculated before the unit hour. Using the amount of carbon in the roots and the decomposition coefficient of roots, Calculating a carbon change amount of dead fine roots per unit time by calculating a decrease in carbon content in the carbon black; And
And calculating the amount of carbon in the first dead organic matter by using the calculated amount of change in carbon per unit time of the dead top dead wood, the leaves, the dead dead wood, and the dead wood root. The method according to claim 1,
The step of calculating the amount of carbon in the forest includes:
Calculating a stem mass per unit area using a stem material per unit area and a wood basic density;
Calculating mass per unit area of branches, leaves, main roots, and fine roots by using the stem mass per unit area and the conversion factor; And
Calculating the amount of carbon in the forest using the mass per unit area, the area, and the carbon concentration in the living body in each of the parts,
Wherein the staple count per unit area is calculated by using a position index and a gender. delete The method according to claim 1,
Wherein the step of calculating the amount of carbon in the second dead organic matter comprises:
The increase of the amount of carbon in the corroded organic matter was calculated by using the carbon amount, the atmospheric release ratio and the decomposition coefficient relative to the carbon loss amount calculated before each unit time, and the amount of carbon in the corroded dead organic matter and corrosion Calculating a carbon change amount of the dead organic matter that has been corroded per unit time by calculating a decrease in the amount of carbon in the corroded dead organic matter using the decomposition coefficient of the dead organic matter;
An increase in the amount of carbon in the soil carbon is calculated according to the amount of carbon in the corroded dead organic matter that was calculated before the unit hour, the rate of air release to the carbon loss amount of the corroded dead organic matter, and the decomposition coefficient of the corroded dead organic matter, Calculating the amount of carbon change in the soil carbon per unit time by calculating a reduction in the amount of carbon in the soil carbon using the amount of carbon in the soil carbon and the decomposition coefficient of the soil carbon; And
Calculating the amount of carbon in the second dead organic matter using the carbon change amount of the dead organic matter that has been corroded per unit time and the carbon change amount of the soil carbon per unit time,
Wherein the carbon amount calculated before the unit time per unit is the carbon amount calculated before the unit time of the ground dead wood, the fallen leaves, the dead wood dead wood, and the dead wood root. A computer-readable recording medium storing a program for causing a computer to execute the method according to any one of claims 1 to 4. 3. The method of claim 2,
The status index,
The method according to any one of claims 1 to 3, wherein the index of the variation of the standing biomass according to the soil fertility is calculated from the table of yields using the Gombertz function.

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