碩士 / 國立臺灣海洋大學 / 海洋環境資訊學系 / 98 / Abstract
The Danshuei River, containing three major tributaries the Keelung River, the Hsintien and the Da-Han River, is the largest river system in northern Taiwan. More than six millions of population, exceeding one quarter of Taiwanses, live in the catchment area. Due to the treated and untreated domestic and industrial waste water discharging into the tributaries, it is known that all the three tributaries are seriously polluted. The cleaning work of the polluted rivers has been progressed since 1990 by EPA.. Now, the Taipei county and EPA declare that the water quality of the three tributaries has been improved because of the cleaning work. The purpose of this work is to analyze the nutrients concentrations of the Keelung tributary by means of two surveys and to assess the water quality.
This concentration ranges of the studied water parameters are as follows: pH, 7.35-8.31; dissolved oxygen, 1.35-9.45 mg/L; phosphate, 0.13-5.45 μM; silicate, 3.13-138.06 μM; ammonia, 1.74-242.5 μM ; nitrite, 0.56-10.87 μM; nitrate, 5.06-48.73 μM; and chlorophyll a, 0.15-5.94 μg/L. The lower part of the Keelung River, from the Da bridge to , the water quality index ranges within 25-61 (average 49.63) belonging to E-D Level of the EPA Water Standard. The lower estuary of the Danshuei River, from the Da bridge to river mouth, the water quality index ranges within 46-87 (average 72) belonging to B-A Level of the EPA Water Standard. The water quality of the lower estuary of the Danshuei river is strongly depended on the tide. The water quality of the lower estuary during the flood period is better than the ebb period. The result of this study indicates that the water quality is still poor.
| Identifer | oai:union.ndltd.org:TW/098NTOU5282024 |
| Date | January 2010 |
| Creators | Yueh-Tzu,Chu, 朱悅慈 |
| Contributors | Tien-His Fang, 方天熹 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 83 |
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