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Taihu Basin Xitiaoxi non-point source nutrient load simulation output

Author: WangHui
Tutor: ZhangMingQing
School: Capital Normal University
Course: Physical Geography
Keywords: One dimension network Sobek model Calibration and Authentication Loads estimation West tiaoxi basin
CLC: X522
Type: Master's thesis
Year: 2011
Downloads: 67
Quote: 0
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Abstract


Along with the influence of the people’s activity, the deterioration of water quality is more and more serious day by day. The Taihu lake, for example, has seen eutrophication occurrences due to point and non-point source pollution. With point source pollution being gradually put under control, the non-point source pollution stands as the major issue that needs to be addressed to prevent possible large scale eutrophication in the lake. So estimation of water pollutant loads of the Taihu lake is one of the national important projects in our country. This article is aimed at studying variation regularity of the water flow and water quality in this basin with the Sobek model. Using calibrated and verified model, quantitative evaluation of non-point source pollution load has been done.This article establishes the one-dimensional unconstant flow model and quality model. Assigning the various parameters, the model is Calibrated and Authenticated until fitting the precision. Relative error was calculated to evaluate applicability of SOBEK model. On the basis of hydrology simulation, the variation processes and changing laws of pollutant within the west tiaoxi river basin is studied.Colligate the full text, we may attain conclusion as follows:(1)Sobek model has stable computation, extremely fast speed and high visible degree.(2) The flow model has realized the computational simulation of the change regularity of water flow in time and space. The fitting results illustrate that water flow model is suitable to the west tiaoxi river basin, and can be used in the hydrodynamics characters analysis.(3) The one-dimensional quality model has realized the computational simulation of the density distribution of the river. The validation results showed that the model could be used for water quality simulation for the rivers of study region.

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CLC: > Environmental science, safety science > Environmental pollution and its prevention > Water pollution and its control > River
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