臺灣地區集水區河川侵蝕速率之分析

Analysis of Catchment Denudation Rates in Taiwan

沈少文(Shaw-Wen Sheen)

《水保技術》 6卷2期 (2011/04) Pp. 90-97

https://doi.org/10.30040/JSWCT.201104.0003

摘要

臺灣時常發生颱風水患，因此探討水文環境有助於臺灣地區永續經營與管理，本研究主要目的是分析臺灣地區蘭陽溪蘭陽大橋測站、濁水溪桶頭(2)測站、高屏溪荖濃測站與花蓮溪花蓮大橋測站河川侵蝕速率。本研究使用測站河川流量－河川含砂量資料建立迴歸模式以推測測站河川含砂量，本研究計算河川輸砂量與河川侵蝕速率。本研究發現蘭陽溪蘭陽大橋測站河川平均侵蝕速率是0.2497公釐／日，濁水溪桶頭(2)測站河川平均侵蝕速率是0.9032，高屏溪荖濃測站河川平均侵蝕速率是0.4901，花蓮溪花蓮大橋測站河川平均侵蝕速率是1.2137。本研究發現蘭陽溪蘭陽大橋測站百分之五十時間河川侵蝕速率大於0.0276公釐／日，濁水溪桶頭(2)測站百分之五十時間河川侵蝕速率大於0.0020，高屏溪荖濃測站百分之五十時間河川侵蝕速率大於0.0095，花蓮溪花蓮大橋測站百分之五十時間河川侵蝕速率大於0.0550。臺灣地區河川侵蝕速率分析結果可供相關單位參考，期望有助於臺灣地區水文環境永續經營與管理。

關鍵字

河川流量 ； 河川輸砂量 ； 侵蝕速率 ； 頻率分析 ； 臺灣

並列摘要

Typhoons and floods often occurred in Taiwan area. Therefore, to examine hydrological environments of Taiwan was helpful to the sustainable development and management of Taiwan. The aim of this study was to analyze catchment denudation rates of Lan Yang Creek, Cho Shui Creek, Kao Ping Creek, and Hua Lien Creek. This study used the rating equations to estimate daily average sediment content from daily mean discharge of Lan Yang Creek, Cho Shui Creek, Kao Ping Creek, and Hua Lien Creek. Results show that at the Lan Yang Creek station daily average denudation rate was 0.2497 mm/day. At the Cho Shui Creek station daily average denudation rate was 0.9032 mm/day. At the Kao Ping Creek station daily average denudation rate was 0.4901 mm/day. At the Hua Lien station daily average denudation rate was 1.2137 mm/day. Results also show that at the Lan Yang Creek station the denudation rate was larger than 0.0276 mm/day in 50% of the period. At the Cho Shui Creek station the denudation rate was larger than 0.0020 mm/day in 50% of the period. At the Kao Ping Creek station the denudation rate was larger than 0.0095 mm/day in 50% of the period. At the Hua Lien Creek station the denudation rate was larger than 0.0550 mm/day in 50% of the period. The results were expected to help the sustainable development and management of water resource in Taiwan.

並列關鍵字

Stream Discharge ； Suspended Load ； Denudation Rate ； Frequency Analysis ； Taiwan