【摘要】 <正> 由地面资料评价一个地区地下水的排泄地段,已经有了一套比较成功的方法。然而,地面方法相对来说所需要的时间长,花钱多,尤其是在那些交通不便,人们难以到达的地区。四十年代以来,随着航空地质工作的发展,借助于航空摄影所提供的地形、植被类型、地层产状以及破裂等资料来分析地下水的补给和排泄关系。虽然这是一种间接的方法,却给予水文更多还原

【Abstract】 An airborne thermal infrared scanning was conducted in Guilin-Yangsu karst region in September, 1980. The direct discharge points such as springs, karst pools,the outlet of underground river are clearly shown on the predawn thermal infrared images, and they could be distinguished from surface water bodies according to the exposed geological and geomorphic locations. From the pattern of the discharge points on the images, water-conducting media can be indirectly deduced as tabullar, layered or fissural type. Images of different leakage of three reservoirs in the peak-cluster depressions are cited in the paper. The use of infrared imagery gray scale caused by the differences in soil moisture inferring the discharge area of groundwater mainly applies to the arid and semi-arid areas. But in the karst regions in southern China, shallow aquifers can still be reflected to some extent on the predawn infrared imagery,although shallow karst groundwater is of less significance because of pollution.The key to finding the deeper karst water is to analyze the lineaments. The thermal infrared scanning has been proved to be an effective means by a comparison of the infrared image with the existing water wells in the Dongheishan syncline in Guilin.Some knowledge of the Taohua River ancient channel, a tributary of the Lijiang River, has been available, but its framework is more clearly revealed by the interpretation of the infrared images. The industrial waste products such as the smoke from the tall chimney, coal cinders and the discharge of sewage from the power plant south of Guilin are all reflected to some extent on the infrared images.更多还原