广西凌云县地下水资源量评价

为研究广西凌云县地下水资源状况,在分析区内地质构造、岩溶发育特征、含水介质及水动力条件的基础上,采用降水入渗系数法和枯季径流模数法分别对凌云县地下水天然补给量和可开采资源量进行评价,并对地下水资源空间分布特征进行分析。结果表明: 全区地下水多年平均天然补给量112 619.73万m³/a,其中岩溶地下水多年平均天然补给量69 797.68万m³/a,基岩裂隙水多年平均天然补给量为42 822.05万m³/a,可开采资源量为9 840.37万m³/a。区内岩溶发育较强烈,岩溶形态丰富,岩溶发育在垂向上具有一定分带性,高程跨度大,地下水资源空间分布总体相对较为均匀。研究成果为凌云县地下水资源可持续开发利用提供了科学依据。

Evaluation of groundwater resources quantity in Lingyun County of Guangxi

In order to study the situation of groundwater resources in Lingyun County of Guangxi,based on the analysis of geological structure,karst development characteristics,water-bearing medium and hydrodynamic conditions,the author evaluated the natural recharge and recoverable resources of groundwater in Lingyun County through precipitation infiltration coefficient method and runoff modulus method in dry season,and analyzed the spatial distribution characteristics of groundwater resources.The results show that the annual average natural recharge of groundwater in the whole region is 112619.73×10⁴m³/a,of which the annual average natural recharge of karst groundwater is 69797.68×10⁴m³/a,and the annual average natural recharge of bedrock fissure water is 42822.05×10⁴m³/a,with 9840.37×10⁴m³/a of recoverable resource.The karst is well developed in this area,with abundant karst forms.The karst development has certain subdivision in the vertical,of which the elevation span is large,and the overall spatial distribution of groundwater resources is relatively uniform.This research results provide scientific basis for the sustainable development and utilization of groundwater resources in Lingyun County.