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題 名 | 從水污染觀點重估灌溉需水量之數學理論與應用 |
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作 者 | 張文亮; 黃耿亮; | 書刊名 | 農業工程學報 |
卷 期 | 41:2 1995.06[民84.06] |
頁 次 | 頁21-28 |
分類號 | 434.2571 |
關鍵詞 | 鹽分灌溉水; 灌溉需水量; 根系深度; Water salinity; Irrigation water requirement; Root depth; |
語 文 | 中文(Chinese) |
中文摘要 | 臺灣現階段不僅灌溉用水量逐漸減少,同時水遭受污染日益嚴重;傳統的灌溉需水量是由蒸發散量來決定,未考慮水污染的影響。本研究是加上灌溉水質因子,導出數學公式,計算不同灌溉水質情況下的灌溉需水量。數學理論的推導由最基本的達西公式—赫夫曼公式,在考慮土壤鹽分、淋洗率、作物根系吸水率、根系深度、水田蒸發、作物產量對土壤鹽分減產斜率,與灌溉水鹽分,這些因子,導出灌溉水鹽分,作物減產與灌溉需水量的關係。並利用盆栽實驗結果,來計算不同灌溉水鹽分的灌溉需水量,並可計算遭受鹽分污染時,作物產量的損害。 |
英文摘要 | Recently, irrigation water has been reduced and polluted severally. Traditionally, estimation of irrigation water requirement only considered amount of evapotranspiration which does not consider water quality. The purpose of this study is to consider both evapotranspiration and water quality to establish theoretical equations, then to calculate different amount of irrigation water requirement under different concentration of water salinity. Theory is derived from Darcy's law and Maas-Hoffman equation, and consider many factors in soil-water-air-plant relationship like soil salinity, leaching ratio, water absorption by different root zone, evapotranspiration, water salinity etc.. Results of pot experiment were also applied to equation to calculate percentage of yield decreasing related with water salinity and irrigation water requirement. |
本系統中英文摘要資訊取自各篇刊載內容。