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The Study of water quality of the Hsin-Dian stream and Danshuei Estuary
|Authors: ||Jia- Chi Tasi|
|Contributors: ||NTOU:Department of Marine Environmental Informatics|
Hsin-Dian River, Danshuei estuary, nutrients, water quality index
|Issue Date: ||2011-06-30T08:15:51Z
|Abstract: ||台灣北部最大河流是淡水河流域，它的流域居住了超過六佰萬的居民，大約有台灣四分之一人口住在淡水河流域面積內。淡水河包含三大支流-新店溪、大漢溪及基隆河，其中新店溪是第二大的支流，為了了解新店溪及淡水河流域的水質狀況，本研究以98年11月及99年 6月二航次調查從淡水河出海口至新店溪主流的水質狀況，並使用WQI(water quality index)水質指數，綜合評估研究區域內的水質狀況。 本研究兩航次調查水質參數濃度範圍如下：酸鹼值 7.25-8.01；溶氧 1.06-8.03 mg/L；磷酸鹽1.51-7.69 μM；矽酸鹽 19.71-147.06 μM；氨氮 47.63-195 μM；亞硝酸鹽 1.82-7.14 μM；硝酸鹽1.99-46.90 μM；與葉綠素甲 0.15-6.14 μg/L。其中淡水河從淡水海巡署測站到中興橋測站WQI指數範圍介於14.5.-20，平均值為17.2，屬於戊類水質，新店溪從華江橋測站到綠寶石河濱公園測站WQI指數範圍介於18-19.5，平均值為19.3，亦屬於戊類水質。本研究結果顯示新店溪及淡水河水質仍屬不良。|
The Hsin-Dian River is the second largest tributary of the Danshuei estuary in northern Taiwan. More than six millions of population, exceeding one quarter of Taiwanses, live in the catchment area of the Danshuei River system. Due to over emphasizing the economic development in the past three decades, it is known that the Danshuei River system has been seriously polluted by anthropogenic activity, mostly from the domestic wastewater discharging into the river system. In order to understand the current state of the water quality of the Hsin-Dian River and the Danshuei estuary, the present study analyzed the nutrients concentrations of the Hsin-Dian River and the Danshuei estuary by means of two surveys and used the water quality index (WQI) to assess the water quality. This concentration ranges of the studied water parameters are as follows: pH, 7.25-8.01; dissolved oxygen, 1.06-8.03 mg/L; phosphate, 1.51-7.69 μM; silicate, 19.71-147.1 μM; ammonia, 47.6-195 μM ; nitrite, 1.82-7.14 μM; nitrate, 1.99-46.9 μM; and chlorophyll a, 0.15-6.14 μg/L. The WQI values obtained in the two surveys ranged within 13-21 and the water quality belonged to E-F according to the EPA classification. Surprisingly, the WQI values found in the Danshuei lower estuary was also low. The reason for this is attributed to the low tide during the sampled periods and to the ammonia concentration was quite high, which worsens the water quality. The ammonia source is probably from the domestic discharge and from the pore water release due to the reducing environment.
|Appears in Collections:||[海洋環境資訊系] 博碩士論文|
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