台灣地區歷年各標的用水統計，農業用水均約佔全國總用水量70％以上，除為用水最大宗，亦常有用水量過多之疑問被提出，尤其在亢旱時期，各標的用水爭取水源之狀況，農業用水更是常成為首先必須支援其他標的用水的目標，雖因農業灌溉擁有缺水忍受度較高的優點，但亦需從影響層面較小的方式進行用水調節，以增加缺水時期的用水彈性空間。。農業灌溉方式多由上游處往下游處灌溉，以桃園台地的地形為例，灌溉之餘水多以迴歸水形式，出現於下游地區重覆利用，上游處產生之餘水可由橫向水路直接攔截直接引入下游田區灌溉或匯流至埤塘等蓄水設施或河川，再取水灌溉下游灌區，而由應用層面而言，經重複灌溉使用後，無法再提供其他標的使用者為灌區內的農地迴歸水，亦屬於傳統之補助水源。然於探討地表迴歸水之同時，其補注於地下水之動態，亦應同時加以關注，俾了解竹桃北地區在抗旱時期，是否能以地下水作為偏遠地區之補助水源，以度過水情不佳的枯水期。本研究乃著重於發展埤塘與地下水智慧抗旱功能及開發用水管理，以作為抗旱備援系統，提供相關用水管理單位參考，達成提升農業部門灌溉用水效率及埤塘與地水水資源充分利用之目標。 ;The agricultural water consumption statistics from the various standards in the recent year accounted for more than 70% of the total water consumption in Taiwan. Apart from the largest water usage, there are often questions about excessive water use, especially during the drought period. Agricultural water is often the first priority to support other standard water use. Although agricultural irrigation has the advantage of high water tolerance, it is also necessary to adjust water use in a lesser way to increase water use during water shortage. In the case of irrigation, the remaining water is mostly in the form of return water, which appears in the lower reaches of the area for reuse. The surplus water generated in the upstream can be intercepted directly by the horizontal waterway to the downstream fields into irrigation facilities or confluence with ponds and other water storage facilities or rivers and re-drawing of irrigation water for downstream irrigation areas. However, from the aspect of application, after repeated irrigation, return water can provide no other target users for farmland in irrigation areas. Moreover, when we are investigating the return of surface water, we should pay attention to the dynamics of groundwater during its replenishment so as to understand whether the northern part of the Taiwan can use groundwater as a subsidized water source in remote areas during the drought-stricken period. This study focuses on the development of farm pond and groundwater intelligent drought management scheme as a drought backup supply system to provide relevant water management units reference to improve the efficiency of irrigation water use in the agricultural sector and make full use of the pond and groundwater water resources as well.
