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題名 | 越域引水對其下游農業灌溉用水影響之探討--以大安溪士 林堰為例=The Effects of Cross-basin Abstraction on Downstream Agriculture Irrigation Water:A Case Study on Da-an River Shih-Lin Weir |
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作者 | 王明信; 林信輝; 陳獻; Wan, Ming-hsin; Ling, Shin-hwei; Chen, Shinne; |
期刊 | 水土保持學報 |
出版日期 | 20111200 |
卷期 | 43:4 2011.12[民100.12] |
頁次 | 頁411-428 |
分類號 | 443.046 |
語文 | chi |
關鍵詞 | 超越機率; 越域引水; 農業灌溉; 缺水率; Exceedence probability; Cross-basin abstraction; Agriculture irrigation; Ratio of water deficiency; |
中文摘要 | 本研究選取大安溪士林堰上游象鼻(3)水文測站之歷史河川日流量資料計算成旬平均日流 量,並據以統計分析當旬之超越機率及判斷當旬自然豐枯水文現象。經演算士林堰越域引水前 後各七年間(1996~2009,計504 旬)各不同缺水程度發生之旬數,比較其差異性。結果顯示;士 林堰營運後總缺水旬數為營運前2.06 倍;50~60%缺水率高達5.75 倍。而在水稻耕作尖峰用水 期,越域引水營運前第一期與第二期稻作缺水旬數分別為7 旬及5 旬,營運後缺水旬數為16 旬及18 旬,而其水稻耕作最需水之本田時段,一期稻作營運前缺水旬數為12 旬,營運後為23 旬,二期稻作營運前缺水旬數為5 旬,營運後為18 旬。以上數據得知,營運前缺水受自然水 文現象影響,主要缺水時段為一期作水稻耕作尖峰用水時間,但營運後,不但未改善營運前之 缺水狀況,且原本不太缺水之二期作,也出現頻繁缺水。故士林堰越域引水,確有影響下游農 業灌溉。 |
英文摘要 | With the historical data of river daily flow recorded in Hsiang-pi(3) Gauging Station on the upstream of Da-an River Shih-Lin Weir to calculate ten-day average daily flow, the statistics of the ten-day exceedence probability was analyzed and the ten-day natural hydrological phenomena in flood and dry seasons were determined. Having calculated the number of ten-day periods when various water shortages occurred within 7 years before and after the cross-basin abstraction inShih-Lin Weir (1996~2009, total 504 ten-day periods), the differences were further compared. The results showed that the total ten-day periods of water shortage was 2.06 times of it before the operation of Shih-Lin Weir and the ratio of water deficiency being 50~60% reached 5.75 times. In the peak period of water requirement for paddy farming, the number of ten-day water shortage in the first phase and the second phase of paddy farming were 7 and 5, respectively, before the operation of cross-basin abstraction, while they increased to 16 and 18, respectively, after the operation. During water requirement periods for paddy farming, the number of ten-day water shortage in the first phase was 12 before the operation and became 23 after the operation, while it was 5 before the operation and increased to 18 after the operation in the second phase. Based on the above data, the water shortage before the operation was affected by natural hydrological phenomena when the major water shortage appeared in the peak water requirement for paddy farming in the first phase. However, the situation of water shortage was not improved after the operation, but it frequently appeared on the farming in the second phase, when water shortage was not common. In this case, the cross-basin abstraction of Shih-Lin Weir could indeed affect the downstream agriculture irrigation. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。