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題 名 | 水田休耕對農業用水量影響之研究=Study on the Impact on Agricultural Water Demand from Partial Sabbath of Paddy Farming |
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作 者 | 蘇明道; 蔡天雄; 糠瑞林; | 書刊名 | 農業工程學報 |
卷 期 | 42:4 1996.12[民85.12] |
頁 次 | 頁41-47 |
分類號 | 434.287 |
關鍵詞 | 休耕; 農業用水; 水資源; 可挪用水率; Land recess; Agriculture water demand; Water resources; Water resource reallocation; |
語 文 | 中文(Chinese) |
中文摘要 | 台灣地區由於水資源有限,加上經濟蓬勃發展,各標的需水量逐年增加,且台灣河流短急,雨量分配不均,雖然有約2500公釐的平均年雨量,在需水量增大及新水源開發不易的情況下,供水漸顯不足經常出現缺水之情況;乾旱發生時,由於農業用水佔總用水量比例較大,其他用水標的常要求釋出農業用水以解決供水之不足,導致農地必須休耕以支援民生工業用水。 本研究運用亂數模擬休耕的情況以研討休耕率與可挪用水率的關係,對相同的休耕率以亂數訂出不同的休耕區域並重複模擬一千次,由模擬結果找出休耕率與可挪用水率的關係。研究中先行採用六腳前山的一個輪區做驗證,再採用面積較大之白河灌區作為應用的實例,並試著將本休耕模擬程式與地理資訊系統相結合,由地理資訊系統將基本資料送出到本程式,以快速求得可挪用水率與休耕率之關係,並找出影響休耕率與可挪用水率關係的指標值,最後展示出休耕區域工作決策參考。 在六腳前山區的小區域之研討中,可挪用水率的變動範圍約在5%左右;在白河灌區之研討中,可挪用水率的變動範圍稍擴大且在休耕率為50%時最大達到7.6%;研究中並證實休耕輪區的零碎性越大,可挪用水率越小;休耕輪區面積之均勻度越大,可挪用水率越大。 |
英文摘要 | The objective of this study is to find out the relationship between the percentage of land recess and the percentage of released water using a Monte Carlo simulation technique. A in the command area were numbered and random numbers were generated for simulation of land recess. The simulation model was then executed and compute the water that can be released was computed. It is found that the range of the percentage of releases water is about 5%. For example, the percentage of released water may be somewhere between 46% and 53% if 50% of the area is recessed. The variation is not very significant because that most of the canal in Taiwan are lined and most of paddy farm are relatively uniformed in soil texture (paddy are grew in fields with less percolation potential). |
本系統中英文摘要資訊取自各篇刊載內容。