CN113029290A - Method for measuring appropriate water level of aquatic plant - Google Patents
Method for measuring appropriate water level of aquatic plant Download PDFInfo
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- CN113029290A CN113029290A CN202110216521.0A CN202110216521A CN113029290A CN 113029290 A CN113029290 A CN 113029290A CN 202110216521 A CN202110216521 A CN 202110216521A CN 113029290 A CN113029290 A CN 113029290A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 118
- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000004458 analytical method Methods 0.000 claims abstract description 7
- 238000005516 engineering process Methods 0.000 claims abstract description 7
- 230000007613 environmental effect Effects 0.000 claims abstract description 6
- 238000011161 development Methods 0.000 claims abstract description 5
- 241000196324 Embryophyta Species 0.000 claims description 27
- 241000894007 species Species 0.000 claims description 22
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 8
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 8
- 241001330002 Bambuseae Species 0.000 claims description 8
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 8
- 239000011425 bamboo Substances 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 4
- 230000009286 beneficial effect Effects 0.000 claims description 3
- 238000011835 investigation Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 claims description 3
- 230000005855 radiation Effects 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims 1
- 239000002689 soil Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract description 2
- 241000282414 Homo sapiens Species 0.000 description 2
- 238000009331 sowing Methods 0.000 description 2
- 244000025254 Cannabis sativa Species 0.000 description 1
- 241000195493 Cryptophyta Species 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
- G01F23/22—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water
- G01F23/28—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by measuring physical variables, other than linear dimensions, pressure or weight, dependent on the level to be measured, e.g. by difference of heat transfer of steam or water by measuring the variations of parameters of electromagnetic or acoustic waves applied directly to the liquid or fluent solid material
- G01F23/284—Electromagnetic waves
- G01F23/292—Light, e.g. infrared or ultraviolet
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01W—METEOROLOGY
- G01W1/00—Meteorology
- G01W1/02—Instruments for indicating weather conditions by measuring two or more variables, e.g. humidity, pressure, temperature, cloud cover or wind speed
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Abstract
The invention discloses a method for measuring the appropriate water level of aquatic plants, which comprises the following steps: collecting original data of a preset area, wherein the original data comprises topographic data, a land use type graph and meteorological data of the preset area; setting sample plots under different water level gradients, and selecting target species for introduction according to the characteristics of the sample plots; creating an environmental condition favorable for the growth and development of target plants, introducing target species by adopting different planting technologies, measuring vegetation data, and carrying out sample survey to obtain vegetation parameters; and analyzing the relation between the target species and the water level by using a Kendall rank correlation coefficient, discussing the relation between the target species and the water level by virtue of canonical correspondence analysis, and selecting a water level sensitive value based on the two analyses. The invention improves the measurement precision of the ecological water demand of the degraded wetland in the predetermined area, considers the planting method and the environment of the vegetation, can more accurately measure the water level sensitive value of the vegetation, and can better recover and protect the degraded wetland.
Description
Technical Field
The invention relates to the technical field of water conservancy, in particular to a method for measuring an appropriate water level of an aquatic plant.
Background
The wetland is a unique ecological system formed by the interaction of land and water on the earth, is one of ecological landscapes which are most rich in biological diversity in the nature and the most important living environment of human beings, and has huge functions and value. But the wetland area is sharply reduced and the function is seriously degraded under the dual influence of climate change and human activities. The protection of the existing wetland, the restoration of the degraded wetland and the reasonable utilization of the wetland become the most effective means for bringing ecological, social and economic benefits into play. The estimation of the water demand of the ecological environment of the degraded wetland is a problem which needs to be solved urgently for ecological and environmental protection of the degraded wetland and is also a requirement for reasonable allocation of water resources. The ecological water demand of the degraded wetland refers to the water quantity which needs to be supplemented when the wetland is used for ecological consumption every year, and mainly supplements the water quantity needed by the evaporation and emission of a wetland ecosystem.
According to the theory of multiple stable states of the lake, the lake has a clear water system (grass type lake) which mainly comprises large-scale aquatic high plants and has strong self-purification capability and a turbid water system (algae type lake) which mainly comprises phytoplankton, the appropriate water level of the aquatic plants can evaluate the hydrological conditions required by the healthy state of the lake ecosystem, the growth condition of species can be known by monitoring the water level of the modern lake, the water quantity of the lake can be adjusted in time, and the lake ecological system plays an important role in maintaining species diversity of the lake ecosystem.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a method for measuring the appropriate water level of aquatic plants.
The invention provides a method for measuring the appropriate water level of aquatic plants, which comprises the following steps:
s1, collecting original data of a preset area, wherein the original data comprises topographic data, a land use type map and meteorological data of the preset area;
s2 sample plots are set under different water level gradients, and target species are selected according to the characteristics of the sample plots for introduction;
s3, creating environmental conditions beneficial to the growth and development of target plants, introducing target species by adopting different planting technologies, measuring vegetation data, and carrying out sample investigation to obtain vegetation parameters;
s4, analyzing the relation between the target species and the water level by using a Kendall rank correlation coefficient, analyzing and discussing the relation between the target species and the water level by means of canonical correspondence, and selecting a water level sensitive value based on the two analyses;
s5 determining a water level threshold value suitable for vegetation growth based on vegetation parameter data, different water level gradient conditions of plants and water level sensitive values of target species, and obtaining vegetation distribution data under different water level gradient conditions based on the water level threshold value, topographic data in a preset area and a land utilization type map;
s6, transmitting the water level threshold values corresponding to the vegetation distribution data under different water level gradient conditions to a distributed database for storage.
Preferably, the meteorological data in step S1 includes air temperature, air pressure, wind speed and total ground surface radiation data.
Preferably, the vegetation parameters in step S3 include vegetation height, vegetation coverage and leaf area index, and linear interpolation is performed on the measured vegetation parameters to obtain annual vegetation parameter data.
Preferably, the vegetation coverage is the mean value of the vegetation coverage of each sample, the vegetation leaf area index is measured by adopting a leaf area meter, the leaf area, the length, the width and the accumulated leaf area data are obtained by scanning and data processing of the instrument, and the accumulated leaf area data are divided by the sample area to obtain the leaf area index.
Preferably, the step S3 is to perform year-round potential evapotranspiration measurement of the plots with different water level gradients, and obtain the ecological water demand of the degraded wetland based on the water level gradients.
Preferably, the step S2 of setting the water level gradient sets the water level gradient on the land use type map, and sets the appropriate water level at the early stage of the growing season of the wetland vegetation as the first gradient; the water level rise of the rich water year is set as a second gradient, the water level fall of the dry water year and the extra dry water year is set as a third gradient and a fourth gradient, and the threshold interval of the ecological water demand of the wetland is determined according to the water level fluctuation range of the wetland for many years.
Preferably, the planting technology comprises a seed and vegetative mass propagation method and a cutting method.
Preferably, the seed and vegetative mass propagation method respectively comprises the steps of directly adopting a method of sowing submerged plant seeds or vegetative masses in a water area with the thickness of substrate mud being more than 15cm and smaller stormy waves to recover the vegetation, and the cuttage method comprises the steps of binding the plants and bamboo sticks together and inserting the bamboo sticks into the substrate 20-50cm to ensure that the bamboo sticks are as far as possible immersed in the mud.
According to the method for measuring the appropriate water level of the aquatic plants, the measurement precision of the ecological water demand of the degraded wetland in the preset area is improved, the planting method and the environment of the vegetation are considered, the water level sensitive value of the vegetation can be measured more accurately, and the degraded wetland can be better recovered and protected.
Drawings
FIG. 1 is a schematic flow chart of a method for determining an appropriate water level of an aquatic plant according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, a method for determining a suitable water level of an aquatic plant includes the steps of:
s1, collecting original data of a preset area, wherein the original data comprises topographic data, a land use type map and meteorological data of the preset area;
s2 sample plots are set under different water level gradients, and target species are selected according to the characteristics of the sample plots for introduction;
s3, creating environmental conditions beneficial to the growth and development of target plants, introducing target species by adopting different planting technologies, measuring vegetation data, and carrying out sample investigation to obtain vegetation parameters;
s4, analyzing the relation between the target species and the water level by using a Kendall rank correlation coefficient, analyzing and discussing the relation between the target species and the water level by means of canonical correspondence, and selecting a water level sensitive value based on the two analyses;
s5 determining a water level threshold value suitable for vegetation growth based on vegetation parameter data, different water level gradient conditions of plants and water level sensitive values of target species, and obtaining vegetation distribution data under different water level gradient conditions based on the water level threshold value, topographic data in a preset area and a land utilization type map;
s6, transmitting the water level threshold values corresponding to the vegetation distribution data under different water level gradient conditions to a distributed database for storage.
In the present invention, the meteorological data in step S1 includes air temperature, air pressure, wind speed, and total ground surface radiation amount data.
In the invention, the vegetation parameters in the step S3 comprise vegetation height, vegetation coverage and leaf area index, and the measured vegetation parameters are subjected to linear interpolation to obtain annual vegetation parameter data.
The vegetation coverage is the mean value of the vegetation coverage of each sample, the vegetation leaf area index is measured by adopting a leaf area meter, the leaf area, the length, the width and the accumulated leaf area data are obtained by scanning and data processing through the leaf area meter, and the leaf area index is obtained by dividing the accumulated leaf area data by the sample area.
In the invention, step S3 is used for carrying out year-round potential evapotranspiration measurement on the sample plots with different water level gradients, and obtaining the ecological water demand of the degraded wetland based on the water level gradients.
In the invention, step S2 is set water level gradient, which is to set water level gradient on the land use type graph, and the proper water level at the early stage of the growing season of the wetland vegetation is set as a first gradient; the water level rise of the rich water year is set as a second gradient, the water level fall of the dry water year and the extra dry water year is set as a third gradient and a fourth gradient, and the threshold interval of the ecological water demand of the wetland is determined according to the water level fluctuation range of the wetland for many years.
The planting technology comprises a seed and vegetative mass propagation method and a cutting method.
In the invention, the seed and vegetative mass propagation methods respectively comprise that in a water area with the thickness of bottom mud being more than 15cm and smaller stormy waves, the vegetation is restored by directly adopting a method of sowing submerged plant seeds or vegetative masses, and the cuttage method comprises the steps of binding the plants and bamboo sticks together and inserting the bamboo sticks into the bottom materials with the thickness of 20-50cm so that the bamboo sticks are as far as possible immersed in the mud.
The invention comprises the following steps: collecting original data of a preset area, wherein the original data comprises topographic data, a land use type graph and meteorological data of the preset area; setting sample plots under different water level gradients, and selecting target species for introduction according to the characteristics of the sample plots; creating an environmental condition favorable for the growth and development of target plants, introducing target species by adopting different planting technologies, measuring vegetation data, and carrying out sample survey to obtain vegetation parameters; analyzing the relation between the target species and the water level by using a Kendall rank correlation coefficient, discussing the relation between the target species and the water level by virtue of canonical correspondence analysis, and selecting a water level sensitive value based on the two analyses; determining a water level threshold value suitable for vegetation growth based on vegetation parameter data, different water level gradient conditions of plants and water level sensitive values of target species, and obtaining vegetation distribution data under different water level gradient conditions based on the water level threshold value, topographic data in a preset area and a land utilization type map; and transmitting the water level threshold values corresponding to the vegetation distribution data under different water level gradient conditions to a distributed database for storage.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (8)
1. A method for measuring the proper water level of aquatic plants is characterized by comprising the following steps:
s1, collecting original data of a preset area, wherein the original data comprises topographic data, a land use type map and meteorological data of the preset area;
s2 sample plots are set under different water level gradients, and target species are selected according to the characteristics of the sample plots for introduction;
s3, creating environmental conditions beneficial to the growth and development of target plants, introducing target species by adopting different planting technologies, measuring vegetation data, and carrying out sample investigation to obtain vegetation parameters;
s4, analyzing the relation between the target species and the water level by using a Kendall rank correlation coefficient, analyzing and discussing the relation between the target species and the water level by means of canonical correspondence, and selecting a water level sensitive value based on the two analyses;
s5 determining a water level threshold value suitable for vegetation growth based on vegetation parameter data, different water level gradient conditions of plants and water level sensitive values of target species, and obtaining vegetation distribution data under different water level gradient conditions based on the water level threshold value, topographic data in a preset area and a land utilization type map;
s6, transmitting the water level threshold values corresponding to the vegetation distribution data under different water level gradient conditions to a distributed database for storage.
2. The method as claimed in claim 1, wherein the meteorological data in step S1 includes air temperature, air pressure, wind speed and total ground surface radiation data.
3. The method for determining the water level suitable for the aquatic plant according to claim 1, wherein the vegetation parameters in step S3 include vegetation height, vegetation coverage and leaf area index, and the measured vegetation parameters are linearly interpolated to obtain annual vegetation parameter data.
4. The method of claim 3, wherein the vegetation coverage is an average value of vegetation coverage of each sample, the vegetation leaf area index is measured by using a leaf area meter, the leaf area, the length, the width and the accumulated leaf area data are obtained by scanning and data processing, and the accumulated leaf area data are divided by the sample area to obtain the leaf area index.
5. The method for determining the water level suitable for the aquatic plant according to claim 1, wherein the step S3 is performed to measure the annual potential evapotranspiration amount of the sample plot with different water level gradients, so as to obtain the ecological water demand of the degraded wetland based on the water level gradients.
6. The method for determining an appropriate water level for aquatic plants according to claim 1, wherein the step S2 is performed by setting a water level gradient on the land use type map, and setting the appropriate water level at the early season of growth of the wetland vegetation to a first gradient; the water level rise of the rich water year is set as a second gradient, the water level fall of the dry water year and the extra dry water year is set as a third gradient and a fourth gradient, and the threshold interval of the ecological water demand of the wetland is determined according to the water level fluctuation range of the wetland for many years.
7. The method of claim 1, wherein the planting technique includes seed, vegetative mass propagation, and cutting.
8. The method of claim 7, wherein the seed and vegetative propagation method comprises directly planting the seeds or vegetative bodies of submerged plants in a water area with a sediment thickness of >15cm and less wind waves, and the cutting method comprises binding the plants with bamboo sticks and inserting the substrate 20-50cm to make the bamboo sticks as far as possible into the soil.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113591032A (en) * | 2021-07-15 | 2021-11-02 | 清华大学深圳国际研究生院 | Method for calculating optimal growth elevation of mangrove plant |
| CN116843276A (en) * | 2023-02-15 | 2023-10-03 | 新世纪发展集团有限公司 | Intelligent garden maintenance management system and method based on Internet of things |
| CN118212535A (en) * | 2024-05-17 | 2024-06-18 | 江西省林业科学院 | Wetland aquatic plant cultivation management system and method |
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