毛乌素沙地海流兔河流域水文地质特征

Hydrogeological characteristics of underwater aquifer in the Hailiutu River Basin

海流兔河流域是毛乌素沙地的代表性流域,开展以流域为单元的研究,将为毛乌素沙地的流域水资源配置提供科学依据。通过系统分析海流兔河流域的含水层展布和地下水分布特征,创新性地将含水层厚度和地下水埋深的分区进行小波图像融合后,得到了新的水文地质参数分区。结果表明:海流兔河流域的第四系及白垩系为该区域的巨厚含水层系统,其中白垩系含水层由南向北逐渐增厚,整体上该流域地下水资源量丰富。克里金指数模型适用于海流兔河流域的地下水埋深插值,该模型得到的流域地下水埋深为0—43 m,其中地下水埋深3 m以上的区域占流域的主体部分。以Symlets小波函数作为离散小波变换的图像融合技术对海流兔河流域的水文地质参数分区具有较强的适用性。

Hailiutu River Basin(HRB)is the representative watershed of Maowusu sandy land.This paper takes the basin as a unit to carry out the research,which will provide a scientific basis for the allocation of water resources.In this paper,the new hydrogeological parameter zoning was obtained by innovatively combining the subdivision of aquifer thickness and groundwater depth with wavelet image fusion by systematically analyzing the aquifer distribution and groundwater distribution characteristics of HRB.The results show that the Quaternary and Cretaceous in HRB are the huge thick aquifer system,and the Cretaceous aquifer gradually thickens from south to north.The watershed is rich in groundwater resources.The Kriging index model is suitable for the interpolation of the groundwater level in HRB,and the groundwater level obtained by the model is about 0-43 m,among which the area with groundwater level of more than 3 m accounts for the main part of the basin.The image fusion technology using Symlets wavelet function as discrete wavelet transform has a strong applicability to the hydrogeological parameter zoning of HRB.