Huge Rainfall on Groundawter Quality in Arid Zone

在年降水量远小于潜在蒸发量的干旱区，阐明地下水补给机制对水文科学和区域地下水开发都具有重要意义。为了明确上述对象，调查于去年2月至3月进行。在阿联酋各地采集了200多个地下水样本，虽然发现水质演化过程对区域地下水运动有很好的响应，但对地下水补给机制的定量理解仍有待进一步研究。在上述研究期后，3月10日至3月15日，阿联酋全境出现了一次异常降雨，预计在这种情况下，地下水的大量补给会改变地下水的化学成分。1997年3月1日至3月30日，从去年调查的同一井抽取地下水。虽然还没有对所有的数据和样本进行分析，但是达到了预期的结果。

Clarification of groundwater recharge mechanism in arid area, where annual precipitation is much less than potential evaporation, is very important both for hydrological science and regional groundwater development.In order to clarify above mentioned object, the investigation was taken from February to March in last year. More than 200 groundwater samples have been taken around the whole U.A.E.Althogh It was found that water quality evolution processes respond to regional groundwater movement very well but understanding of groundwater recharge mechanism quantitatively was left pending as the future study.After mentioned research period, from March 10, to March 15, an unusual rainfall occered in whole U.A.E and it was expected that the chemical composition of groundwater was changed in such a case by the large volume of groundwater recharge.Groundwater sampling from the same wells of last year's survey was carried out from March I,to March 30,1997.Although all data and samples are not yet analyzed, the expected results are achieved.