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題名 | 立霧溪流域水質特性=The Water Quality Characteristics of Liwu River Basin |
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作者 | 許文昌; | 書刊名 | 國家公園學報 |
卷期 | 15:2 民94.12 |
頁次 | 頁89-103 |
分類號 | 445.213 |
關鍵詞 | 立霧溪; 水質; 河川污染程度指標; 暴雨逕流; Liwu river; Water quality; River pollution index; Storn runoff; |
語文 | 中文(Chinese) |
中文摘要 | 本研究針對立霧溪流域進行水質監測,監測項目包含水溫、電導度、酸鹼值、溶氧、生化需氧量、懸浮固體物與水溶性離子物種(□、□、□、□、□、□、□、□、□、□、□等物種),量測結果並以我國環保署使用的河川污染程度指標(River Pollution Index, RPI)評估立霧溪流域水質污染程度。結果顯示在未受暴雨影響的晴天日,立霧溪流域各監測點水質多屬於『未(稍)受污染』程度,當流域內有顯著降雨發生時,溪水中懸浮固體物濃度激增十至數百倍,導致溪水水質呈現『中度污染』程度。暴雨逕流對於表土的沖刷作用為導致立霧溪流域水質惡化的主要因素。立霧溪流域各測點所測得溪水中主要的離子物種仍以與地質條件有密切相關的□、□、□、□測值較高,□、□、□等與人為活較有關聯的離子物種濃度較低。暴雨逕流在立霧溪主流溪水中離物種度的變化上,扮演舉足輕重的角色,不但降低地質元素相關離子物種的度,同時也造成與表土有關的營養離子物種(□與□)濃度的增高。 |
英文摘要 | This study monitors the water quality in Liwu river basin. The measured items of water quality monitoring included temperature, conductivity, pH, dissolved oxygen (DO), biochemical oxygen demand (BOD) suspended solids (SS) and water-soluble ion species (□、□、□、□、□、□、□、□、□、□、□). The measured results are expressed by RPI (river pollution index), consisting of DO, SS, □, BOD to assess the water quality. The results showed that the condition of the water quality from the monitoring sites in Liwu river basin was『unpolluted level』 on a sunny day which was not under the influence of rainstorms. When remarkable rainstorms occurred in the basin, the concentration of the SS in river water was increased and the range was ten to hundred times comparing to the result on a sunny day. The condition of the water quality was aggravated to 『medium polluted level』. The major factor causing the aggravation of the water quality in Liwu river basin was the erosion caused by storm runoff carried a large amount of surface soil into the river. The major water-soluble ion species measured from the monitoring sites along Liwu River basin were □、□、□、□,which are extremely interrelated to the elements of geology. The concentration of □、□、□, which are immensely connected with human activities was lower. Storm runoff plays a remarkable role not only on decreasing concentration of geologic ion species (like □ and □) in river water, but also on increasing concentration of nutritive ion species (like □ and □) in river water. |
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