| 英文摘要 |
The purpose of this study is to investigate the point and non-point pollution sources within Feitsui reservoir watershed. The following conclusions can be draw from this study.
1. Land cover variation between 1998 and 2004 was judged by using SPOT satellite images and with the help of aerial photographs the landuse change can be identified. Agricultural land increased remarkably from 1434 hectare to 1986 hectare about 38%.
2. All the point sources such as household, store, farm, and recreation areas have been located by GPS and recorded as a GIS layer.
3. The wastewater treatment system and the service area has been examined as well as the amount of nutrients discharged from the treatment plant.
4. From the nutrients budget of reservoir shown that former studies all under estimate the loading of the reservoir due to neglect of deposition of the sediments.
5. The construction of Freeway No.5 has significant influence on soil erosion at the early construction stage in 1996 the annual sediment loading as high as 3 times of average year and up to per year.
6. Feitsui watershed belongs to subtropical rainforest ecosystem plant growth fast soil and water conservation is the most important measures to keep the water quality in good condition.
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