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題名 | 臺灣東部地區集水區河川侵蝕速率之研究=The Study of Watershed Stream Denudation Rates in Eastern Taiwan |
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作者姓名(中文) | 沈少文; | 書刊名 | 農林學報 |
卷期 | 62:3 2013.09[民102.09] |
頁次 | 頁225-248 |
分類號 | 436.124 |
關鍵詞 | 河川侵蝕速率; 預測區間; 臺灣東部地區; Stream denudation rate; Prediction interval; Eastern Taiwan; |
語文 | 中文(Chinese) |
中文摘要 | 臺灣東部地區時常發生颱風水患,探討當地水文變遷有助於臺灣東部地區環境永續經營與管理,本研究主要目的是分析花蓮溪與秀姑巒溪河川侵蝕速率。本研究使用1970年至2009年花蓮溪與秀姑巒溪河川流量-河川含砂量資料,建立迴歸模式以推測花蓮溪花蓮大橋測站、花蓮溪仁壽橋測站與秀姑巒溪瑞穗大橋測站日平均河川含砂量。本研究計算河川流量1cms~ 10,000 cms之河川含砂量與其90%、95%和99%預測區間,本研究同時計算各月平均河川侵蝕速率,花蓮溪花蓮大橋測站6~11月河川侵蝕速率為4.10 mm,佔全年侵蝕速率95%,12~5月河川侵蝕速率為0.21 mm,佔全年侵蝕速率5%。花蓮溪仁壽橋測站6~11月河川侵蝕速率為2.75 mm,佔全年侵蝕速率95%,12~5月河川侵蝕速率為0.16 mm,佔全年侵蝕速率5%。秀姑巒溪瑞穗大橋測站6~11月河川侵蝕速率為2.40 mm,佔全年侵蝕速率96%,12~5月河川侵蝕速率為0.09 mm,佔全年侵蝕速率4%。本研究計算1970~2009年年平均河川侵蝕速率與其90%、95%和99%預測區間,花蓮溪花蓮大橋測站1970~2009年年平均河川侵蝕速率為4.31 mm/年,90%預測區間上限是24.22 mm/年,下限是0.77 mm/年。花蓮溪仁壽橋測站1970~2009年年平均河川侵蝕速率為2.91 mm/年,90%預測區間上限是19.89 mm/年,下限是0.43 mm/年。秀姑巒溪瑞穗大橋測站1970~2009年年平均河川侵蝕速率為2.49 mm/年,90%預測區間上限是14.45 mm/年,下限是0.43 mm/年。本研究分析花蓮溪花蓮大橋測站、花蓮溪仁壽橋測站與秀姑巒溪瑞穗大橋測站河川流量、河川含砂量、河川輸砂量與河川侵蝕速率,研究結果可供相關單位參考,期望有助於臺灣東部地區水文環境永續經營與管理。 |
英文摘要 | Typhoons and floods often occur in eastern Taiwan. Therefore, to examine hydrological changes of this area is helpful to the sustainable development and management of eastern Taiwan. The aim of this study is to analyze temporal changes in the denudation rates of Hua Lien Creek and Hsiu Ku Luan Creek. This study uses the rating equations to estimate daily average sediment content from daily mean discharge of the Hua Lien Creek and Hsiu Ku Luan Creek in the period of 1970 to 2009. This study estimated the sediment content when the stream discharge ranged from 1cms to 10,000 cms. The 90%, 95% and 99% prediction intervals were calculated. This study also estimated the monthly mean stream denudation rates at Hua Lien Bridge station, Jen Shou Bridge station, and Jui Sui Bridge station. The denudation rate was 4.10mm from June to November at Hua Lien Bridge station and 0.22mm from December to May. The denudation rate was 2.75mm from June to November at Jen Shou Bridge station and 0.16mm from December to May. The denudation rate was 2.40mm from June to November at Jui Sui Bridge station and 0.09mm from December to May. This study estimated the stream denudation rates in the period of 1970 to 2009. The 90%, 95% and 99% prediction intervals were calculated. The annual mean denudation rate was 4.31mm at Hua Lien Bridge station, 2.91mm at Jen Shou Bridge station, and 2.49mm at Jui Sui Bridge station. The results are helpful to the sustainable development and management of eastern Taiwan. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。