基于水环境同位素的汉北流域水循环研究

Research on the Water Cycle in Hanbei Basin Based on Water Environmental Isotopes

利用同位素标记不同水体的方法,对汉北流域内稳定同位素进行测试与分析,探讨研究区内大气降水、河流、土壤水和地下水体的转化关系及转换比例,以期为研究区内水资源可持续管理提供技术支撑。结果表明:汉北流域的区域降水线为:δD=8.44δO+7.88,与全球大气降水线比较,汉北流域的大气降水线斜率与截距存在一定程度的偏移,其降雨受蒸发作用的影响较为明显;对汉北流域不同水体转化率进行计算,汉北流域河流水中大气降水占比约为38.2%、土壤水占比约为15.8%、地下水占比约为19.3%。

Isotopes are adopted to label different water bodies to test and analyze the stable isotopes in the Hanbei River Basin. The transformation relationship and conversion ratio of atmospheric precipitation,rivers,soil water and groundwater bodies in the study area are explored to provide technical support for the sustainable management of water resources in the study area. The results show that the regional precipitation line is δD=8.44δO+7.88. Compared with the global precipitation line,the slope and intercept of the precipitation line in the Hanbei Basin are offset to a certain extent,and precipitation is obviously affected by evaporation. The results show that the proportion of atmospheric precipitation,soil water and groundwater in the river water of Hanbei Basin is 38.2%,15.8% and 19.3%,respectively.