汾河二坝灌区咸淡水分布特征研究

本文介绍了应用地球物理的电阻率法研究咸淡水分布的原理、汾河二坝灌区不同水质的电阻率曲线特征及应用本方法在汾河二坝灌区的研究成果。对于同类地区的地下水评价、开发利用具有指导意义。

Study of the Distribution Characteristics of Salt and Fresh Water in Erba Irrigation District, the Fenhe River

For the purpose of the tudy,(1)The resisivity(p)-mineralization of water in wells(c)curve based an equation of p=AcC-1 is drawn, where Ac is a coefficient depending onthe water quality,in Erba irrigation district, Ac=20, according to the writers' analysis,(2)The resistivity sounding curves used to study the variation of resistivity with depth aredrawn according to measured data.From the above curves,it is clear that the mineralizationof water at different points,horizontal orvertical,would be attained only by knowing of theresistivity. In this paper,the writers present a salt/fresh water distribution map,on whichthe Erba irrigation district is divided into three zones:salt zonel,brackish water zone and freshwater zone,Each zone has its own characteristics of water quality in vertical distrhution asshown in the resistivity curves. The study result is of great important significance indevelop-ing of ground water,evaluating water resources in this and the same region.