基于Landsat 8 OLI__TIRS数据的找地下水靶区预测研究

Study of Prediction of Groundwater Target Based on Landsat 8 OLI__TIRS Data

遥感技术因为它独特的优点(宏观性、综合性、动态性、快速性)而广泛利用于地下水资源调查[1],能更准确掌握调查区域地下水形成、贮存,运动特征、水质、水量的变化规律,节省野外勘察费的大量人力、物力,为地下水资源的规划、开发和合理利用提供充足的水文地质依据[2]。以Landsat 8 OLI__TIRS的多光谱数据和热红外数据为信息源,通过各种遥感图像增强处理和波段运算,获取了与地下水富集带有关的两个重要水文要素信息——线性构造特征和地表温度信息,最终在综合分析这些信息基础上圈定出找地下水靶区,并对圈定结果与区域水文地质图进行对比验证,结果证明,利用遥感技术在缺水区进行地下水勘查,能够为快速、有效地寻找地下水资源提供技术依据,减少地下水勘查中物力和人力的大量耗费,为实际地面调查和物探工作提供依据。

Remote sensing technology is widely used in groundwater resources survey because of its unique advantages（ macroscopic,comprehensive,dynamic and rapid）. It can maintain formation and storage of the groundwater,also movement characteristics,water quality and the law of changes of water quantity,so that a large amount of manpower and material resources for field investigation can be saved,and adequate hydrogeological basis can be provided for the planning,development and rational utilization of groundwater resources. Based on the multi-spectral data and thermal infrared data of Landsat 8 OLI__TIRS,two important hydrological elements related to the groundwater enrichment zone are obtained--the linear structural features and surface temperature through various remote sensing image enhancement processing and band operations. Finally,based on the comprehensive analysis of these information,the groundwater target area is delineated,and the results of the delineation are compared with the regional hydrogeological maps. The results show that the use of remote sensing technology in the water shortage area for groundwater exploration can provide technical basis in looking for groundwater resources fast and effectively,reduce a large number of consumption of manpower and material resources in the groundwater exploration,and provide basis for the practical ground investigation and geophysical work.