济南趵突泉泉域泉群生态基流量研究

济南趵突泉泉域分布着趵突泉、黑虎泉、珍珠泉和五龙潭四大泉群,自20世纪50年代以来四大泉群泉流量总体呈衰减趋势,泉流量由50年代的36.6万m3/d衰减到近年的8~12万m3/d。泉水基流是一种较为稳定的径流流量,是下游河道的重要补水来源,是维持河道与湖泊生态系统健康的重要保障。利用基流分割法,对趵突泉泉群泉流量数据不同频率年进行分析计算,确定稳定的基流指数,计算不同水平年的泉水基流量;利用拐点法计算了济南泉群下游河道的生态需水量;分析了泉水生态基流量和河道需水量之间的关系,揭示了济南市的岩溶泉水对河流、湖泊等生态系统健康状况的影响,为济南市泉水保护提供了重要的技术支撑。

Research on the Ecological Base Flow of Baotu Springs in Jinan Spring Region

Jinan spring catchment has four spring groups:Baotu Springs,Heihu Springs,Zhenzhu Springs and Wulongtan Springs.Since the 1950s,the average flow of springs has been decreasing from 36.6×104 m3/d to the current level of 8×104 to 12×104 m3/d.Springs base flow is a component of the relatively stable runoff,which is an important source of downstream river,and it is an important guarantee to maintain the ecosystem health of river course and lake.The paper calculates the base flow of Baotu Springs group in different frequency years,determines the stable base flow index,and calculates the spring base flow in different level years,and the ecological water demand of downstream river is calculated by using the inflection point method.This paper analyzes the relationship between the ecological base flow of spring water and river water demand,reveals the influence of karst springs on the health of rivers,lakes and other ecosystems in Jinan,and provides an important technical support for the protection of springs water in Jinan.