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Spatial Variability of Water Quality Parameters in Rivers

Author: ZhangLin
Tutor: MouZiPing;SunHongQuan
School: Suzhou Institute of Technology
Course: Environmental Engineering
Keywords: Water quality parameters Temporal and spatial variability Eutrophication Geostatistics Fuzzy Comprehensive Evaluation Suzhou
CLC: X824
Type: Master's thesis
Year: 2011
Downloads: 52
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Abstract


Suzhou, one of the city as China's rapid economic growth, the government departments on the protection of the water environment, more emphasis on river water quality in the area is not optimistic, but with the rapid advance of industrialization and urbanization, the quality of river water environment has become limiting factors for sustainable urban development. Therefore, there is the necessary regional river water quality of the space variation of sexual conduct analysis and research, which visually presents the river water affected by pollution in the geographical variation of resistance, this Suzhou river water environment of evaluation and planning has a positive significance. Suzhou city 320km 2 within rivers, of COD Mn NH 3 -N, TP three major water quality The parameters were monitored. First, a fuzzy comprehensive evaluation method to evaluate river water quality status quo; followed by the application of the theories and methods of geostatistics, spatial and temporal characteristics of the different river water quality parameters and trend analysis. The main course of the study and conclusions are as follows: (1) the use of monitoring data 2 010 years, three major rivers of Suzhou city water period, analysis of regional river water environmental factors pollution status. The results showed that the dry, flat water, wet three periods, rivers COD Mn better pollution control, NH 3 -N and TP are the main influencing factors of pollution, especially NH 3 -N, the average concentration of each monitoring sections have more than average surface water standards Ⅴ class values. (2) the use of fuzzy comprehensive evaluation method, a comprehensive evaluation and analysis of the water quality of the water phase of the three major rivers in Suzhou city. The results show that the Suzhou river water quality has been polluted to varying degrees in the dry season, for example, in addition to the two sections X1 and 46, other cross-section integrated water quality are inferior Ⅴ. (3) In order to reveal the spatial and temporal characteristics and trends of Suzhou urban river water quality parameters, the application of geostatistics variogram spherical model and kriging indicators of organic pollution of river eutrophication indicators spatial interpolation and draw the spatial and temporal distribution of the contour map for the analysis of the spatial and temporal distribution of the results showed that: disparities in different regions of the pollution sources, differences and aquatic plants of different water periods of the different conditions of the river itself, the inflow of water, the river flow differences river water quality parameters of the impact, Suzhou city showing different spatial and temporal variability of; various water quality parameters that pollution is very serious, especially eutrophication indicators of nitrogen and phosphorus is the most significant. (4), than in the the external river into the pollution from the sources of pollution of the river, in Suzhou city rivers influenced by internal pollution emissions more serious, which mainly includes three parts of industrial pollution, urban living, pollution, contamination of surface runoff .

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CLC: > Environmental science, safety science > Environmental Quality Assessment and Environmental Monitoring > Analysis and Evaluation of Environmental Quality > Water Quality Assessment
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