Title page for etd-0729109-020540

URN	etd-0729109-020540	Statistics	This thesis had been viewed 1061 times. Download 0 times.
Author	Kun-Yi Hsieh
Author's Email Address	No Public.
Department	hazards
Year	2008	Semester	2
Degree	Master	Type of Document	Master's Thesis
Language	zh-TW.Big5 Chinese	Page Count	65
Title	Variation Tendency of River Water Qualities - A Case Study of the Nanshi Watershed
Keyword	River Pollution Index Box-and-whisker plot Nanshi Watershed River Water Qualities River Water Qualities Nanshi Watershed Box-and-whisker plot River Pollution Index
Abstract	This study focuses on Nanshi River, the main drinking water source of Taipei City, and tries to analyse the water quality monitoring data of the Taipei Water Management Office from 1986 to 2008. The study tries to determine the trend of changes in the Nanshi River water quality, focusing on data such as pH, dissolved oxygen, BOD (biochemical oxygen demand), suspended solid content, escherichia coli, ammonia nitrogen and total phosphorus; using methods such as qualified ratio analysis, graphic analysis and water quality index analysis. The result shows that from 1986 to 2008, the dissolved oxygen level has dropped at Fushan Station and Tonghou Stream, while the BOD index rose. This suggests that the touristic activity may have caused influence. The water quality index analysis showed that over 90% showed a non-polluted status, and that the water quality status at Tonghou Streem is more stable than at Nanshi River. From the water quality monitoring data from 2005 to 2008, the result analysis of Tonghou Stream prior and pro entering Nanshi River, showed that the pH and dissolved oxygen at Wulai dam is lower than the two stations upstream, and the BOD is higher. Water quality at Tonghou Stream is more stable and has less influence on the downstream area, while Nanshi River has a bigger variety in water quality, and thus more easily affects the river water quality downstream, especially the suspended solid content. The return analysis of the water quality at Lanshen Bridge, Tonghou Stream and Wulai Dam are as follows: the Lanshen Bridge and Tonghou Stream’s suspended solid content R2 is 0.8663 while the at Wulai Dam is 0.1266, showing Wulai Dam’s suspended solid content’s main source being Lanshen Bridge.
Advisor Committee	Tien-Ho Kuo - advisor none - co-chair none - co-chair
Files	etd-0729109-020540.pdf indicate not accessible
Date of Defense	2009-06-24	Date of Submission	2009-07-29

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