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十分重要的意义。在阿联酋各地采集了200多个地下水样品，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认识有待于进一步的研究。在上述研究期间，从3月10日到3月15日，全阿联酋发生了一场异常降雨，预计地下水的化学成分会因地下水补给量的增加而发生变化。去年调查的同一井的地下水采样是在1997年3月1日至3月30日进行的。虽然所有的数据和样本都还没有分析，达到了预期效果。

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.