Method for simulating nitrogen and phosphorus pollution load of lake in region with developed irrigation system

A pollution load, irrigation system technology, applied in the field of water pollution simulation, to achieve the effect of improving accuracy and applicability

Inactive Publication Date: 2016-12-21
CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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Problems solved by technology

[0004] The purpose of the present invention is to propose a method for simulating nitrogen and phosphorus pollution load of lakes in areas with developed irrigation systems in view of the deficiencies of the existing nitrogen and phosphorus pollution load simulation methods.

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  • Method for simulating nitrogen and phosphorus pollution load of lake in region with developed irrigation system
  • Method for simulating nitrogen and phosphorus pollution load of lake in region with developed irrigation system
  • Method for simulating nitrogen and phosphorus pollution load of lake in region with developed irrigation system

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Embodiment

[0077] Example: see figure 1 , a method for simulating the nitrogen and phosphorus pollution load of lakes in areas with developed irrigation systems. The Wuliangsuhai lake in the Hetao area with developed irrigation systems was selected for empirical research. The steps of the method are as follows:

[0078] Step 1: Analysis of irrigation and drainage systems in the study area

[0079] The irrigation system in the Hetao area is developed. The irrigation system in the entire Hetao irrigation area has seven levels, which are composed of the main trunk, the trunk, the sub-trunk, the branch, the bucket, the farm, and the hair. There is currently one main canal with a total length of 180.85km; 13 main canals, There are 48 main canals, 339 branch canals, and 85,522 canals in Dou, Nong and Mao. The drainage system also has seven levels. There is one main ditch with a total length of 228km; The Paigan Ditch, the Eight Pai Gang Ditch, and the Nine Pai Gang Ditch flow into the Wulian...

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Abstract

The invention discloses a method for simulating a nitrogen and phosphorus pollution load of a lake in a region with a developed irrigation system. The method comprises the following steps of (1) analyzing an irrigation and drainage system in a research region; (2) building and calibrating an SWAT model, preparing and formatting model input data, and calibrating and verifying the model; and (3) calculating total nitrogen and total phosphorus. Compared with the prior art, the method has the advantages that various data of a DEM (Digital Elevation Model), soil, weather, land utilization and the like is collected and arranged and is formatted on the basis of analyzing the irrigation and drainage system in the research region to finish building of the SWAT model, the model is calibrated in combination with runoff data actually measured for years by a hydrological station in the research region, and finally the total nitrogen and total phosphorus pollution load of the lake is calculated according to a migration and transfer process and principle of the SWAT model for non-point source pollution, thereby realizing simulation analysis on the nitrogen and phosphorus pollution load of the lake in the region with the developed irrigation system. The method can be widely applied to the simulation calculation of the nitrogen and phosphorus pollution load of the lake in the region with the developed irrigation system.

Description

technical field [0001] The invention relates to the technical field of water pollution simulation, in particular to a method for simulating nitrogen and phosphorus pollution loads of lakes in areas with developed irrigation systems. Background technique [0002] In recent years, the water cycle process has not only been affected by climate change, but also with the unreasonable development activities of human beings, the natural path of the water cycle process has been gradually broken, and the water cycle process has shown the characteristics of "natural-artificial" dual drive, point source, non-point source pollution The migration and transformation of pollutants through the water cycle process, the new "natural-artificial" water cycle characteristics will further expand the range of pollutant migration, due to atmospheric dry and wet deposition, serious soil non-point source pollutants, accumulation of solid waste and other factors, these pollutants Participate in the wat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
CPCG16Z99/00
Inventor 翁白莎严登华王浩吕睿喆严登明刘芳
Owner CHINA INST OF WATER RESOURCES & HYDROPOWER RES
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