隨著環境變遷，石門水庫供水責任與負擔日益加重，而且枯旱缺水問題亦逐年顯現，尤其近三年來北部桃園新竹地區連續調用農業用水支援民生及產業用水，導致數萬公頃農地停灌休耕，除增加政府財政壓力及造成生態環境之危害外，也造成各標的用水單位對於水資源分配、調用方式及移用水價格等之爭議，因此探討石門水庫灌區缺水時期農業用水支援民生、產業用水之灌溉營運因應措施為當前之要務。石門灌區之供水仰賴水庫者僅約48%，其餘有效雨量及河水堰所攔之地面水及迴歸水共約佔52%，而桃園地區有別於台灣其他灌溉區域的地方，即在於本區域的「埤塘系統」，由於地形、水文環境的影響，桃園台地地區得以人工的方式挖掘儲水的埤塘，貯蓄雨水、逕流，達到上流下接的灌溉目的，以增加降雨量之利用，如果有灌溉餘水或回歸水亦可由下游埤塘承接，做重複利用，以便於灌溉之使用，因此本研究將利用水庫-埤塘-攔河堰供水系統之調配，評估所增加之有效降雨量，在不影響農業正常運作下，能減少石門水庫對農業用水標的供水量，進而推估桃園水資源系統之供需概況。 According to social environment tranformation, the water supplying responsiblity and load have been added to Shihmen Reservoir. Moreover, drought and water deficit plight has come out year after year. Especially in lastest three years, Agriculture water of Taoyuan and Hsinchu regions had be transferred consecutively to supply domestic and industrial utilization. The consequence led to irrigation suspension and fallow was executed on farmland of thousands hectares. It was Not only raise the goverment's financial pressure and ecosystem destruction was boosted, but also had controversy between allocation, exchange procedure and transferal cost of water resource. Therefore, it's an important task to research the irrigation strategies when agriculture water tranferred to sustain domestic and industrial utilization, and solved related questions. In shihmen irrigation area, there are approximately 48% water supply from Shuhmen reservoir, and other 52% from effective rainfall, river water and return flow. The principle of irrigation pond system was to storage excess runoff in a rainfall and supplied to agricultural water deficit in the drought, just like reservoirs. It is the ancestor's intention to increase the effective rainfall to overcome the disadvantageous factors of water resource that was formed with particular climate and geography in Taiwan. The irrigation pond-system model was developed to evaluate effective rainfall that could cut down agricultural water demand from Shihmen Reservoir, and to promote the water usage efficiency in farmland. 研究期間：9504 ~ 9512
