CN107092796A - A kind of evaluation method of soil watershed rainwash regulating power - Google Patents
A kind of evaluation method of soil watershed rainwash regulating power Download PDFInfo
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- CN107092796A CN107092796A CN201710280890.XA CN201710280890A CN107092796A CN 107092796 A CN107092796 A CN 107092796A CN 201710280890 A CN201710280890 A CN 201710280890A CN 107092796 A CN107092796 A CN 107092796A
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Abstract
The invention discloses a kind of evaluation method of soil watershed rainwash regulating power, this method carries out sliding-model control by convection current region soil, basin soil is divided into several soil units, and calculate Surface Runoff amount of each soil unit in the different periods of play precipitation, evaluation index of the soil to earth's surface Runoff adjustment ability in single soil unit is calculated further according to the Surface Runoff gauge of the different periods in play precipitation, finally show that whole Watershed Scale soil carries out quantitative assessment to earth's surface Runoff adjustment ability and obtains evaluation index of the Watershed Scale soil to earth's surface Runoff adjustment ability, returning method realizes that soil carries out quantitative assessment to the effect of earth's surface Runoff adjustment on Watershed Scale from regional water recycle recovery aspect, its evaluation is objective, accurately, meet current ecological sponge watershed construction, the current demand that basin drought and waterlogging is successfully managed.
Description
Technical field
The present invention relates to a kind of evaluation method of soil watershed rainwash regulating power.
Background technology
Currently, China faces the shortage of water resources of sternness, basin drought and waterlogging and a variety of water problems such as taken place frequently；Therefore, basin
" peak clipping is mended withered " of rainwash process is increasingly subject to the attention of domestic appropriate regulatory bodies and scientific research scholar.And basin soil is
It is made up of soil particle of different sizes, in irregular shape, is a porous body, " sponge " function with water suction, retaining etc.,
Watershed rainwash process has significant regulating power；This has been known together in academia.
But, because current soil watershed rainwash regulating power not yet forms unified understanding, soil is to runoff
The no reliable judgment criteria of regulating power, causes the evaluation result in different basins even same basin to be difficult to contrast, it is impossible to
It is that ecological sponge basin and Ecology civilization construction provide sufficient reference data.
The content of the invention
, can be to difference it is an object of the invention to provide a kind of evaluation method of soil watershed rainwash regulating power
The soil in basin carries out objective, accurate quantitative assessment to runoff regulating power, is ecological sponge basin and Ecology civilization
Build and sufficient reference data is provided.
In order to solve the above technical problems, the present invention provides a kind of evaluation side of soil watershed rainwash regulating power
Method, comprises the following steps:
S1：According to the basin soil texture, soil thickness, soil porosity, soil body configuration and content of organic matter watershed chi
Spend soil and carry out spatial discretization processing, basin soil is divided into several soil units；
S2：The soil hydraulic characteristics ginseng of each soil unit different soil is calculated according to the soil characteristic parameter of soil
Number；
S3：According to the soil hydraulic characteristics parameter of each soil unit different soil, osmole is entered using Green-Ampt
Type calculates soil infiltration rate；Each soil unit is calculated on the ground of play precipitation different periods further according to soil unit initial water content
Table runoff yield；
S4：Soil in single soil unit is built according to accumulated rainfall in play Precipitation Process and accumulative earth's surface runoff yield
To the evaluation index of earth's surface Runoff adjustment ability；
S5：According to evaluation index of the soil in single soil unit to earth's surface Runoff adjustment ability, using weighted mean method
Watershed yardstick soil carries out quantitative assessment to earth's surface Runoff adjustment ability and obtains Watershed Scale soil to earth's surface Runoff adjustment energy
The evaluation index of power.
Further, soil characteristic parameter is that soil particle diameter level matches somebody with somebody data, soil organic matter content and soil in step S2
Salinity；In step S2 Soil Moisture Dynamics parameter be the soil weight, soil wilting coefficient, field capacity, saturated hydraulic conductivity and
Water conservancy conductivity.
Further, the initial soil moisture content of each soil unit of step S3 basis, rainfall, actual evaporation,
Rainfall intensity, soil infiltration rate and Surface Runoff gauge calculate the earth's surface of different periods of each soil unit lattice in play precipitation
The circular of runoff yield is：
Work as SW0>SWsWhen：
If P-E<0, RI<In, then do not produce stream：R=0；
If P-E<0, RI>In, then runoff yield excess：R=(RI-In) det (t)；
If P-E>0, RI<In, then runoff yield under saturated storage：R=P-E；
If P-E>0, RI>In, then runoff yield excess+runoff yield under saturated storage：RT=P-E；
Work as SW0<SWsWhen：
If P-E<(SW0<SWs), RI<In, then do not produce stream：R=0；
If P-E<(SW0<SWs), RI>In, then runoff yield excess：R=(RI-In) det (t)；
If P-E>(SW0<SWs), RI<In, then runoff yield under saturated storage：R=P-E- (SW0-SWs)；
If P-E>(SW0<SWs), RI>In, then runoff yield excess+runoff yield under saturated storage：RT=P-E- (SW0-SWs)；
Wherein, SW0For initial soil moisture content, SWsFor final soil moisture content, P is the rainfall of each soil unit
(mm)；E is each soil unit actual evaporation (mm)；RI is rainfall intensity (mm/h)；In is soil infiltration rate (mm/hr)；R
For Surface Runoff amount (mm).
Further, step S4's is single according to accumulated rainfall in play Precipitation Process and accumulative earth's surface runoff yield structure
Soil is to the specific formula for calculation of the evaluation index of earth's surface Runoff adjustment ability in soil unit：
In formula, η is soil in single soil unit to the evaluation index of earth's surface Runoff adjustment ability, RiFor play precipitation mistake
Accumulated rainfall in journey, PiFor the accumulative run-off in play Precipitation Process, baseflow is meter flow,
Further, step 5, to the evaluation index of earth's surface Runoff adjustment ability, is adopted according to soil in single soil unit
Earth's surface Runoff adjustment ability is carried out with weighted mean method watershed yardstick soil calculation formula that quantitative assessment uses for：
In formula, ηTFor evaluation index of the Watershed Scale soil to earth's surface Runoff adjustment ability, ηiFor soil in single soil unit
Evaluation index of the earth to earth's surface Runoff adjustment ability.
Beneficial effects of the present invention are：The application from regional water recycle recovery aspect by realizing soil pair on Watershed Scale
Objective, the accurate quantitative assessment of rainwash adjustment effect, meets current ecological sponge watershed construction, basin drought and waterlogging
The current demand successfully managed.
Embodiment
The embodiment to the present invention is described below, in order to which those skilled in the art understand this hair
It is bright, it should be apparent that the invention is not restricted to the scope of embodiment, for those skilled in the art,
As long as various change is in the spirit and scope of the present invention that appended claim is limited and is determined, these changes are aobvious and easy
See, all are using the innovation and creation of present inventive concept in the row of protection.
A kind of evaluation method of soil watershed rainwash regulating power, comprises the following steps：
S1：According to the basin soil texture, soil thickness, soil body configuration, soil porosity and content of organic matter watershed chi
Spend soil and carry out sliding-model control, basin soil is divided into several soil units.
S2：According to the soil particle diameter of soil level with soil characteristic parameters such as data, soil organic matter content and Soil salinities
Calculate the soil weight, soil wilting coefficient, field capacity, saturated hydraulic conductivity and the water conservancy conduction of soil unit different soil
The soil hydraulic characteristics parameters such as degree.
S3：According to the soil hydraulic characteristics parameter of each soil unit different soil, osmole is entered using Green-Ampt
Type calculates soil infiltration rate；Each soil unit is calculated on the ground of play precipitation different periods further according to soil unit initial water content
Table runoff yield；
According to the initial soil moisture content of each soil unit, rainfall, actual evaporation, rainfall intensity, soil infiltration
Rate and Surface Runoff gauge calculate the Surface Runoff amount of different periods of each soil unit lattice in play precipitation, its specific calculating
Method is as follows：
Work as SW0>SWsWhen, i.e., when oneself storage of the early stage soil water is full：
If P-E<0, RI<In, then do not produce stream：R=0；
If P-E<0, RI>In, then runoff yield excess：R=(RI-In) det (t)；
If P-E>0, RI<In, then runoff yield under saturated storage：R=P-E；
If P-E>0, RI>In, then runoff yield excess+runoff yield under saturated storage：RT=P-E；
Work as SW0<SWsWhen, i.e., when the early stage soil water does not store full：
If P-E<(SW0<SWs), RI<In, then do not produce stream：R=0；
If P-E<(SW0<SWs), RI>In, then runoff yield excess：R=(RI-In) det (t)；
If P-E>(SW0<SWs), RI<In, then runoff yield under saturated storage：R=P-E- (SW0-SWs)；
If P-E>(SW0<SWs), RI>In, then runoff yield excess+runoff yield under saturated storage：RT=P-E- (SW0-SWs)；
Wherein, SW0For initial soil moisture content, SWsFor final soil moisture content, P is the rainfall of each soil unit
(mm)；E is each soil unit actual evaporation (mm)；RIFor rainfall intensity (mm/h)；InFor soil infiltration rate (mm/hr)；R
For Surface Runoff amount (mm).
S4：According to soil in accumulated rainfall in play Precipitation Process and the single soil unit of accumulative run-off structure over the ground
The evaluation index of table Runoff adjustment ability, the calculation formula specifically used for：
In formula, η is soil in single soil unit to the evaluation index of earth's surface Runoff adjustment ability, RiFor play precipitation mistake
Accumulated rainfall in journey, PiFor the accumulative run-off in play Precipitation Process, baseflow is meter flow,
S5：According to evaluation index of the soil in single soil unit to earth's surface runoff yield regulating power, using weighted average
Method watershed yardstick soil carries out quantitative assessment to earth's surface Runoff adjustment ability and obtains Watershed Scale soil to earth's surface Runoff adjustment
The evaluation index of ability, the calculation formula specifically used for：
In formula, ηTFor evaluation index of the Watershed Scale soil to earth's surface Runoff adjustment ability, ηiFor soil in single soil unit
Evaluation index of the earth to earth's surface Runoff adjustment ability.
The application carries out sliding-model control by convection current region soil, basin soil is divided into several soil units, and count
Surface Runoff amount of each soil unit in the different periods of play precipitation is calculated, further according to the ground of the different periods in play precipitation
Table runoff yield calculates soil in single soil unit and, to the evaluation index of earth's surface Runoff adjustment ability, finally draws whole basin
Yardstick soil obtains Watershed Scale soil to the progress quantitative assessment of earth's surface Runoff adjustment ability and earth's surface Runoff adjustment ability is commented
Valency index, this method realizes that soil is quantified to the effect of earth's surface Runoff adjustment on Watershed Scale from regional water recycle recovery aspect
Evaluate, the evaluation method is objective, accurate, meet the reality that currently ecological sponge watershed construction, basin drought and waterlogging are successfully managed
Demand.
Claims (5)
1. a kind of evaluation method of soil watershed rainwash regulating power, it is characterised in that comprise the following steps
S1：According to the basin soil texture, soil thickness, soil porosity, soil body configuration and content of organic matter watershed yardstick soil
Earth carries out spatial discretization processing, and basin soil is divided into several soil units；
S2：The soil hydraulic characteristics ginseng of each soil unit different soil is calculated according to the soil characteristic parameter of soil
Number；
S3：According to the soil hydraulic characteristics parameter of each soil unit different soil, osmole is entered using Green-Ampt
Type calculates soil infiltration rate, and its Surface Runoff in play precipitation different periods is calculated further according to soil unit initial water content
Amount；
S4：According to soil in accumulated rainfall in play Precipitation Process and the single soil unit of accumulative earth's surface runoff yield structure over the ground
The evaluation index of table Runoff adjustment ability；
S5：According to evaluation index of the soil in the single soil unit to earth's surface Runoff adjustment ability, using weighted mean method
Watershed yardstick soil carries out quantitative assessment to earth's surface Runoff adjustment ability and obtains Watershed Scale soil to earth's surface Runoff adjustment energy
The evaluation index of power.
2. the evaluation method of soil watershed rainwash regulating power according to claim 1, it is characterised in that step
Soil characteristic parameter described in S2 is that soil particle diameter level matches somebody with somebody data, soil organic matter content and Soil salinity；Described in step S2
Soil Moisture Dynamics parameter is the soil weight, soil wilting coefficient, field capacity, saturated hydraulic conductivity and water conservancy conductivity.
3. the evaluation method of soil watershed rainwash regulating power according to claim 1, it is characterised in that step
Initial soil moisture content, rainfall, actual evaporation, rainfall intensity, the soil infiltration of each soil unit of basis described in S3
Rate and Surface Runoff gauge calculate the specific calculating of the Surface Runoff amount of different periods of each soil unit lattice in play precipitation
Method is：
Work as SW0>SWsWhen：
If P-E<0, RI<In, then do not produce stream：R=0；
If P-E<0, RI>In, then runoff yield excess：R=(RI-In) det (t)；
If P-E>0, RI<In, then runoff yield under saturated storage：R=P-E；
If P-E>0, RI>In, then runoff yield excess+runoff yield under saturated storage：RT=P-E；
Work as SW0<SWsWhen：
If P-E<(SW0<SWs), RI<In, then do not produce stream：R=0；
If P-E<(SW0<SWs), RI>In, then runoff yield excess：R=(RI-In) det (t)；
If P-E>(SW0<SWs), RI<In, then runoff yield under saturated storage：R=P-E- (SW0-SWs)；
If P-E>(SW0<SWs), RI>In, then runoff yield excess+runoff yield under saturated storage：RT=P-E- (SW0-SWs)；Wherein, SW0To be initial
Soil moisture content, SWsFor final soil moisture content, P is the rainfall (mm) of each soil unit；E is that each soil unit is real
Border evaporation capacity (mm)；RI is rainfall intensity (mm/h)；In is soil infiltration rate (mm/hr)；R is Surface Runoff amount (mm).
4. the evaluation method of soil watershed rainwash regulating power according to claim 3, it is characterised in that step
Soil pair in single soil unit is built according to accumulated rainfall in play Precipitation Process and accumulative earth's surface runoff yield described in S4
The specific formula for calculation of the evaluation index of rainwash regulating power is：
In formula, η is soil in single soil unit to the evaluation index of earth's surface Runoff adjustment ability, RiFor in play Precipitation Process
Accumulated rainfall, PiFor the accumulative run-off in play Precipitation Process, baseflow is meter flow,
5. the evaluation method of soil watershed rainwash regulating power according to claim 4, it is characterised in that described
Described in step 5 according to evaluation index of the soil in single soil unit to earth's surface Runoff adjustment ability, using weighted mean method
Watershed yardstick soil earth's surface Runoff adjustment ability is carried out the calculation formula that uses of quantitative assessment for：
<mrow>
<msub>
<mi>&eta;</mi>
<mi>T</mi>
</msub>
<mo>=</mo>
<munderover>
<mo>&Sigma;</mo>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<msub>
<mi>&eta;</mi>
<mi>i</mi>
</msub>
</mrow>
In formula, ηTFor evaluation index of the Watershed Scale soil to earth's surface Runoff adjustment ability, ηiFor soil pair in single soil unit
The evaluation index of rainwash regulating power.
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| CN109409674A (en) * | 2018-09-26 | 2019-03-01 | 中国水利水电科学研究院 | A kind of basin brown Status Quo of Infrastructures Regulation capacity appraisal procedure |
| CN110686862A (en) * | 2019-10-24 | 2020-01-14 | 中国科学院地理科学与资源研究所 | Flow process rasterization method based on soil infiltration capacity |
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| CN108956948A (en) * | 2018-07-02 | 2018-12-07 | 中国水利水电科学研究院 | A kind of porous material produces the recognition methods of stream influence on region of no relief |
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