丽江黑龙潭泉群流量模型与断流分析

Analysis on the flow model and water interruption of the Heilongtan Spring Group

黑龙潭泉群是丽江古城的重要水源,泉水断流严重影响丽江城市发展。本文通过分析黑龙潭泉域的水文地质条件,表明九子海环状构造具备形成泉水的蓄水构造特征,是黑龙潭泉水的泉源;通过分析黑龙潭泉群出水/断流特征与降水的关系,明确了大气降水是黑龙潭泉群的重要补给源;黑龙潭处于九子海环状蓄水构造边界的上部缺口,以此建立了泉群流量分析水文模型,通过泉群流量与区域降水量实测统计分析,确定了维持黑龙潭泉群不发生断流的临界降水量,可为断流年份黑龙潭生态补水方案设计提供依据。

The Heilongtan Spring Group is a vital water source for the ancient city of Lijiang,and the water interruption of springs significantly impacts the urban development of Lijiang.This paper analyzes the hydrogeological conditions in the Heilongtan Spring Group area,demonstrating that the Jiuzi Lake circular structure possesses characteristics of a reservoir structure that can store spring water,making it the source of the Heilongtan Spring.By examining the relationship between the characteristics of water discharge/water interruption in the Heilongtan Spring Group and precipitation,it is established that atmospheric precipitation is a crucial replenishment source for the Heilongtan Spring Group.The Heilongtan Spring is situated at the upper gap of the Jiuzi Lake circular reservoir structure boundary.Using this information,a hydrological model for spring flow analysis is constructed.Through empirical statistical analysis of spring flow and regional precipitation,the critical precipitation level required to prevent the Heilongtan Spring Group from experiencing water interruption is determined.This information can serve as a basis for designing ecological replenishment plans for the Heilongtan Spring Group during years of water interruption.