Study On Application Of Remote Sensing Technology In The Hydrogeology Of Highland Arid Area

Shi Quan He district is relatively lack of water resources, and lacking of water will severely affect the ecological security and sustainable development in the region, and the study area is located in the plateau region, harsh environmental conditions.In the area of hydrogeology situation investigation study by using remote sensing technology, For the region’s hydrogeology resources survey and national defense construction to provide some beneficial reference and basic data.This article is based on scores on the GF-1, ZY-3, landsat8 and ASTER remote sensing data and other sources as the primary source of information, combined with the existing geological and hydrogeological data, carrying out hydrogeology survey of 1:50000 map sheet in Shi Quan He district, To identify surface water and groundwater, surface geological surveys to determine priorities and a favorable area to find water, Improving purpose of the work. Extraction, and through a variety of remote sensing image enhancement technique and special image processing of multi-source remote sensing data of hydrogeology information extraction and application, Mainly in the following.(1)The establishment of a regional hydrogeological Shi Quan He Remote sensing interpretation,mainly the establishment of interpretation for signs of lithology, structure, Quaternary Alluvial, moisture faults, spring and the spill zone. and remote sensing established under interpreting marks depth interpretation, and finally on field verification interpretation accuracy.(2) Focus on the Cenozoic and the hydrogeological and other relevant factors to understand the translation, dividing the water-bearing formation types in the study area and using MAPGIS software has prepared a study area1: 50000 hydrogeologic remote sensing interpretation map.(3) Using of PCI and ENVI software for ultrabasic rocks and carbonate rocks in the study area lithologic information extraction, combined with field verification, fixing some of lithology previous mistakes made lithology of the study area remote sensing interpretation map.(4)The all elements of hydrogeology water-rich degree of comprehensive analysis, hydrogeologic information on a variety of superposition to find water through the establishment of a remote sensing, Remote sensing in the study area is established for water forecast, delineated the five prospective areas to find water of study area.(5)While forming a difference based on the groundwater environment, depending on the location of the major structural features of the study area, the development scale and distribution characteristics of the distribution of groundwater resources were roughly divided.Through remote sensing hydrogeological survey of the study area, combined with the analysis of the study area groundwater and hydrogeological background of the formation of the law, determine a favorable prospect to find water, have some reference for the study area after hydrogeological investigations. Using of remote sensing technology in the plateau region mapping and hydrogeological investigations with high efficiency and low cost advantages, the paper hopes to provide some useful reference for geological studies similar geological environment Tibet Plateau region hydrology.