牡丹水庫集水區非點源污染模擬及風險分析
Date Issued
2004
Date
2004
Author(s)
劉柏廷
DOI
zh-TW
Abstract
Mu-dan Reservoir was located in the Pingtung and converged by Mu-dan River and Ru-Reng River, the branch of Si-Chong River. Its drainage area is 69.2 square kilometer, and its effective capacity is 30,560,000 cubic meters. Compared with the changing trend of 1999 and 2000 by the sampling of water quality, the Carlson’s TSI values are about 50. It shows that the water of Mu-dan Reservoir is in the trend of eutrophication. Therefore, how to efficiently control the quantity and quality of water infusing into Mu-dan Reservoir and the preservation and administration of drainage area are important issues (to protect watershed ecology).
NPSM, one of BASINS model developed by U.S. Environmental Protection Agency(EPA), is adopted in the study to simulate the transferred quantity of the river and non-point source of the drainage area. The discharge was calibrated with the data in 2000 and 2001, and verified with the data in 2002 and 2003, for confirming the model can be used in this study. Suspended solids and water quality was simulated with the sampling data of storm, then the total pollutant loading of the drainage area could be estimated for watershed managemenr. Latin Hypercube sampling(LHS) and the mean first-order reliability method are applied to determine the parameters significantly affecting uncertainty in the simulated water quality concentrations and analyze the risk of water quality concentrations.
The result shows that NPSM can efficiently simulate the change of the chronic water quality in drainage area. Annual non-point loading of total nitrogen was about 89595kg/yr, total phosphorus was about 2526kg/yr. The total nitrogen per hectare was about 12.95kg/ha/yr, and the total phosphorus per hectare was about 0.36 kg/ha/yr.
Subjects
水質
非點源污染
風險分析
BASINS
Water Quality
non-point sources
SDGs
Type
thesis
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