North China Plain covers an area of 140,000km2. Because of groundwater overdraft for many years, the level is rapidly fallen, shallow water-bearing bed seriously drained, and deep one appears many large-scale drawdown cones. The shortage of groundwater resources cause a tense situation in urban, industry and agriculture water-supply. Under the situation, it is a urgent to us to investigate and evaluate the groundwater useful Potentials. The north part of Taihang Mountain front plain is chosen as a test region using remote sensing technique. Landsat-7TM image and aerial colour infrared image are used in the work. Through a comprehensive analysis and study of satellite and aerial images and other related data, the following results are obtained. (1)The alluvial and flood deposit fans are exactly delimitated. (2)The spacial overlapping relations between different fans are defined.(3)Palaeochannels are interpreted in detail. (4)Ten shallow-buried areas of groundwater and one groundwater discharge are discovered. (5)All surface sediment types and all kinds of microgeomorphic bodies are interpreted. (6)6 rich groundwater areas are definited, and two of all are confirmed by a geological examination.
This paper introduces the approach and application of the investigation of the geological hazards using remote sensing images in Northwestern Hebei. How to select the types of remote sensing images and what method of remote sensing technique should be adopted for different kinds of the geological hazards are described in great detail in the paper. The investigation results of the geological hazards by remote sensing are evaluated in briefly. It is of important real value that the hidden danger areas and geological hazard’s trends are obtained by remote sensing to preventing and harnessing the geological hazards.
In application of remote sensing technology, the type and character of major geologic hazards, as collapse, landslide and mudflow of Hebei mountain region are primarily studied, which is laid the basis to present a schedule of type classification of most dangerous geologic hazards. Beside, regional delimitation of growing degree of hazard in mountain area is carried out by adopting multivariant discriminate method, and individual sections need to be monitoring and protecting are delineated.
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