Method for evaluating service value of ecological system for abating non-point source pollution in water environment

A non-point source pollution, ecosystem technology, applied in the field of assessment of the impact of ecosystems on the water environment, to achieve the effect of accurate simulation results

Inactive Publication Date: 2014-09-10
ANHUI ACADEMY OF ENVRIONMENTAL SCIENCE RESEARCH
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for assessing the service value of ecological system to reduce non-point source polluti...

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  • Method for evaluating service value of ecological system for abating non-point source pollution in water environment

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Embodiment Construction

[0016] Taking Ertan Reservoir of Yalong River as an example, through the calculation formula HSC i = lg{( flow_acc i ) / (Ksat i x soil_depth i ×slope i )} and Value Filte-loads i =MC×max(0,Filte_loads i -EWQ / CN) simulated and calculated the amount of phosphorus filtered by five ecosystems in 2000, that is, the amount of material and the value of the non-point source service of phosphorus in the water receiving water at the outlet of the catchment area were reduced. the result shows:

[0017] 1) The range of the average hydrological sensitive area index of various ecosystems in the watershed ranges from 0.46 to 0.62;

[0018] 2) The average index of key pollution source areas of various ecosystems ranges from 7.05 to 55.46 kg·km -2 ·a -1 ;

[0019] 3) The average material quantity of this service in farmland, forest and grassland ecosystems is 8.46-9.63 Kg.Km -2 .a -1 .

[0020] From the perspective of service value per unit area, the average service value per unit...

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Abstract

The invention discloses a method for evaluating service value of an ecological system for abating non-point source pollution in a water environment. The method includes simulating the ranges of catchment areas by the aid of a model for evaluating the service quality of the ecological system for abating the non-point source pollution in the water environment on the basis of ArcGIS9.2 hydrological analysis tool sets and water and pollutant solute and sediment conjugation migration theories, and defining service providers and service objects; combining output coefficients of certain pollutants of various land utilization types with one another according to hydrological sensitivity coefficients, and identifying critical pollution source areas; combining certain pollutant filter capacity coefficients of the different land utilization types on each grid pixel with one another along flow concentration paths to obtain the pollutant removing quality of vegetation. The value quantity model is computed by the aid of a combination of the marginal cost spent on purifying the certain pollutants and expected water quality standards of outlet sections of the catchment areas.

Description

technical field [0001] The invention belongs to the category of evaluating the impact of an ecological system on the water environment, and specifically belongs to a service value evaluation method for mitigating non-point source pollution of the water environment by the ecological system. Background technique [0002] The relationship between ecosystem structure, ecosystem services and ecological processes has become one of the key topics in future research on ecosystem services. Traditional ecological content cannot meet the needs of comprehensive assessment of ecosystem services. Use model simulations by studying land use planning for water catchments (bodies of surface water and groundwater recharge areas). Maximizing the value of this ecosystem service is chosen as the optimal land use pattern to control non-point source pollution, so as to provide more favorable support for the decision-making of comprehensive ecosystem management in this area. Contents of the inven...

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Application Information

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IPC IPC(8): G06F19/00
Inventor 吴楠高吉喜方降龙何方周晓铁葛菁德里斯
Owner ANHUI ACADEMY OF ENVRIONMENTAL SCIENCE RESEARCH
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