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A Quantitative Method for Determining the Background Concentration of Nitrogen and Phosphorus in Lake Watershed

A technology of background concentration and watershed, applied in the field of environmental protection and comprehensive utilization of resources, can solve the problem of lack of monitoring data of lake-watershed system, and achieve remarkable effect of spatial characteristics

Active Publication Date: 2016-09-14
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Research limited by lack of monitoring data for lake-watershed systems

Method used

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  • A Quantitative Method for Determining the Background Concentration of Nitrogen and Phosphorus in Lake Watershed
  • A Quantitative Method for Determining the Background Concentration of Nitrogen and Phosphorus in Lake Watershed
  • A Quantitative Method for Determining the Background Concentration of Nitrogen and Phosphorus in Lake Watershed

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Experimental program
Comparison scheme
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Embodiment

[0072] The above method was used to simulate the background concentration of nitrogen and phosphorus in the water body of the Chaohu Lake Basin.

[0073] Combined with the actual situation of the study area, determine the level of the water system in the study area as the basic research object, and generate the river water network (see figure 1 , is the water system diagram of the Chaohu Lake Basin in this embodiment). On the basis of field surveys, data collection and sorting, with the support of GIS technology, the spatial and attribute database of nutrients in the study area was constructed, and the attributes of the tributaries on the river network were input and sorted.

[0074] In the target lake basin, according to the natural law of natural water flow from high to low, calculate the DEM data of the target area. Calculate the water flow direction data of the regional topography and the value of the water flow at each point to obtain the cumulative confluence of the reg...

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Abstract

A method for quantitatively determining the background concentration of nitrogen and phosphorus in lake water bodies, the main steps of which include: 1) collecting and organizing basic data; 2) dividing lake watersheds; 3) screening reference watersheds; 4) establishing a regression model to predict reference watersheds The background load of nitrogen and phosphorus in the watershed; 5) Calibrate the regression equation of the background load of nitrogen and phosphorus nutrients in the watershed, and estimate the background nitrogen and phosphorus load of the river network in the watershed area from the source to each tributary; 6) Calculate the background concentration of nitrogen and phosphorus in the lake watershed. The invention provides a new approach for the study of lake eutrophication, lays a foundation for the lake nutrient benchmark, and has important practical significance for the determination of the background concentration of the water body in the lake basin and the protection, evaluation and management of the lake.

Description

technical field [0001] The invention belongs to the technical field of environmental protection and resource comprehensive utilization, and in particular relates to a technical method for quantitatively determining the background concentration of nitrogen and phosphorus in lake basin water, which solves the problem that it is difficult to determine the concentration of nitrogen and phosphorus under natural background conditions under the strong interference of human activities. Background technique [0002] With the development of economy and society, artificial eutrophication (artificial eutrophication), that is, the eutrophication and its impact caused by the urbanization of society, the industrial and agricultural utilization of plant nutrients and the discharge of waste, has increasingly attracted people's attention. s concern. According to foreign experience, the lake nutrient evaluation benchmarks and standards formulated on the basis of nutrient ecological division ar...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 霍守亮席北斗姜甜甜何卓识张列宇
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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