Recharge, development and use of groundwater in U.A.E

在年降水量远小于潜在蒸发量的干旱区，地下水补给对科学研究和区域地下水开发都具有重要意义。为了研究降雨入渗地下水的机理，从2月15日开始，本工程分四个步骤进行。1996年3月4日在阿拉伯联合酋长国。(A)人工降雨处理的降雨入渗实验：发现沙丘是地下水补给的天然堤坝，因为它具有高的水力传导性和高的蓄水能力。(B)通过洪水沉积调查重建的历史洪水：有‘活的’河滩和埋在沙丘中的‘死’河滩，它们与地下水的补给无关。(C)通过实地调查和遥感技术研究水文地质结构。(D)根据同位素和化学成分估计区域地下水：已采集了200多个地下水样本。整个阿联酋研究发现，水质演变过程对区域地下水运动有很好的响应。“活”河滩的地下水停留时间比其他地区短。

Groundwater recharge in arid area, where annual precipitation is much less than potential evaporation, is very important both for science and regional groundwater development. In order to investigate mechanism of rainfall infiltrating into groundwater, four steps in this project were taken from February 15, to March 4,1996 at the United Arab Emirates.(a) Rainfall infiltration processed by artificial rainfall experiments : it was found that sand dune is natural dam for groundwater recharge since its high hydraulic conductivity and high water storage ability.(b) Historical floods rebuilt by flood sedimentation survey : there are 'live' wadis which contribute groundwater recharge and 'die' ones which have been buried in sand dunes and have nothing to do with groundwater recharge.(c) Hydrogeological structure by field survey and remote sensing technology.(d) Estimation of regional groundwater by isotopes and chemical compositions : more than 200 groundwater samples have been taken around the whole U.A.E.It was found that water quality evolution processes respond to regional groundwater movement very well. Groundwater resident time is shorter in 'live' wadis than other areas.