Pollution Source Survey and Prevention Program Assess for the Ta-Han River Basin
Date Issued
2005
Date
2005
Author(s)
Chang, Chun-Kai
DOI
zh-TW
Abstract
The study chose the Ta-Han River and the most important tributary San-Xia River to be the discussion region. First, according to the water quality and quantity, the rain and the quantity of the river. Then use the Qual2K model to simulate the water quality by the Q75 of the Ta-Han River, and use the result to be the basis of the prevention program assess for the Ta-Han River basin.
First of all, this study will estimate the amount of contaminants of the San-Xia River basin. The majority of the contaminants come from domestic wastewater, livestock wastewater, and industrial wastewater. The population distribution will indicate the flow of domestic wastewater. The livestock wastewater and industrial wastewater can be estimated by applying the qualitative and quantitative characteristics. Then with the help of the figures of the paddy planting area from the Taipei County Statistic Summary of 2002 coupled with the geographical information to decide the size of the planting area within 1,500 meters on both sides of the San-Xia River basin and its length along the river. The contaminants will be reduced since the wastewater runs through the riparian corridor of the San-Xia River. The remaining contaminants will become the input into the non point pollution cells of Qual2k and together with the point pollution cells the water quality can be simulated.
However, the reduction of the contaminants flow will be different due to the growing seasons. To find a more reliable result, the contaminants flow of different periods of time to simulate the changes of water quality of the San-Xia River will be compared with the water quality result issued by the Environmental Protection Administration (EPA). The first paddy growing season of the San-Xia River area is from March to July and the second growing season is between August to November. To simulate the water quality, the Q75 of 10 days average flow of March and November are respectively chosen to show the differences in water quality during dry season between wetland and dryland. If the area of the paddy fields within the riparian corridor will be altered so as to evaluate its effect towards the water quality of the San-Xia River.
Subjects
Qual2K
河川廊道
水稻田
Geographic Information System (GIS)
riparian corridor
paddy field
SDGs
Type
thesis
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