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Study on the Monitoring and Evaluation of Nasi Lake Water Quality Based on Remote Sensing

Author: HaiYang
Tutor: MiaoQun
School: Qingdao Technological University
Course: Environmental Engineering
Keywords: Remote sensing Nansi Chlorophyll a Suspension Eutrophication
CLC: X87
Type: Master's thesis
Year: 2008
Downloads: 123
Quote: 1
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Abstract


Water diversion project is to solve our severe water shortages in northern mega infrastructure projects, Nansi North Water Transfer Project as an important water channel and the flood storage lakes, and its direct impact on water quality water diversion merits. Water quality monitoring is a water pollution control and water pollution control planning basis for the work. At present, more commonly used artificial water quality monitoring method, although able to make an accurate analysis and evaluation, but there is not overcome its own shortcomings, time-consuming, laborious, not the economy and the number of sampling points and the sampling frequency is limited, the monitoring results are often not comprehensive, holistic reflection of the entire water body of water environmental quality. Remote sensing of water quality monitoring with a wide range of speed, can be periodically monitored continuously, and can complement traditional manual monitoring and the use of mathematical model to simulate water quality defects and deficiencies. Therefore, the use of remote sensing technology for water quality monitoring and evaluation studies on the Nansi Lake basin water pollution control planning and water pollution control work carried out is very necessary. Thesis analyzed water quality monitoring at home and abroad have been sensing theory, techniques and methods, based on a study of relatively mature as chlorophyll a and suspended solids monitoring indicators, the use of remote sensing satellite ground station order from China covering the entire Nansi Lake District Landsat5 TM remote sensing data, Nansi water bodies of water quality monitoring and evaluation. Papers on Nansi Lake basin natural, social and pollution status of the investigation, based on the identified Nansi chlorophyll a and suspended solids monitoring program and were monitored; quasi-synchronous sampling on the remote sensing data obtained pretreatment; Through the analysis of the spectral characteristics of water quality parameters and remote sensing data with the measured data Pearson correlation analysis between the constructed Nansi chlorophyll a and suspended solids inversion model and application model for Nansi chlorophyll a and suspended was subjected to the inversion and evaluation studies; same time, using Carlson index Nansi eutrophication on the extent and distribution were studied. The results show that: 1) superior Nansi Lake chlorophyll a concentration higher concentrations mainly in the 0-60ug / L between; subordinate Lake chlorophyll a concentration is relatively low, mainly in the concentration range of 0-15ug / L between. 2) Nansihu Lake superior high concentration of suspended solids, mainly in the concentration range 0-60mg / L between; intermediate l suspended solids concentration is relatively low, mainly in the concentration range of 5-30mg / L between. 3) Nansi has a large area of ??the whole lake eutrophication phenomenon in which superiors lake is more serious, most of the lake have moderate eutrophication; subordinate lake eutrophication overall better than the higher lake, the whole lake nutrient levels mainly in the poor nutrition and the nutritional status, but the middle and the north shore of Weishan Lake mild eutrophication phenomena parts. Overall studies have shown that chlorophyll a and Nansi overall higher levels of suspended solids and water body eutrophication has been rendered.

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CLC: > Environmental science, safety science > Environmental Quality Assessment and Environmental Monitoring > Environmental Remote Sensing
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