The Research Of Karst Collapse Risk Assessment And Karst Water Resource Conservation Of North China

As the northern China national economy have developed, and water consumptions used by the industrial and agricultural productions and people's livelihoods have increased, and the pumping groundwater and sap drain increase with each passing days. Karst collapse emerges more and more widely , and becomes the main environment disaster in Karst Area of North China. Karst collapse not only damages surface ecology and deteriorates hydrogeological environment, but also impacts development and usage of all kinds of resources, seriously hinders regional social economic construction and sustainable development as well.The thesis is combined with special scientific research projects of commonweal sex industry supported by Ministry of Land and Resources under Grant No: 200811022, namely"The Research of Formation Mechanism of Groundwater Environmental Problem and Countermeasures in Karstregion in North China". This thesis, with the background of typical karst collapse district in North China- karst collapse district of ShiliSpring Area in Shandong Zao Zhuang , deeply analyzes the background and environment of karst collapse in the north as well as the formation, and deals on distribution regularity and genesis. This thesis,which takes ShiliSpring Area as the typical region, analyzes the impact factors of karst collapse by utilizing the quantification theory, establish risk evaluation model with fuzzy math and optimizes the fuzzy math model, evaluates karst collapse hazard more impersonally.Also,it divides the conservation district of karst water resource from the perspective of karst collapse, shows karst collapse district and conservation district of karst water resource by MAPGIS.So, corresponding protection measures and advice are offered, and some achivements of the oretical significance and practical value are obtained. Induce as follows now:1 The spreadsheet of karst collapse and karst collapse water-bursting colum has been reorganized comprehensively. the distribution map of karst collapse and karst collapse colum in North China on a scale of 1:500000 has been drawn, as well as karst collapse in Zaozhuang.2 The impact factors of karst collapse of Shili Spring Area in Zaozhuang is analyzed. The strength evaluation equation of karst collapse by utilizing the quantification theory I is built, and by calculating the partial correlation coefficients of the impact factors, the contribution rate and relationships among the sequences is ascertained.3 The organic integration of the partial correlation coefficients of the impact factors and the value of the index of fuzzy mathematics theory has been completed, and the evaluation model of karst collapse has been optimized.4 The evaluation model of karst collapse of Shili Spring Area in Zaozhuang has been established by fuzzy mathematics theory. The distribution map of karst collapse of Shili Spring Area in Zaozhuang on a scale of 1:50000 has been drawn.5 From the perspective of karst collapse, the conservation district of karst water resource of Shili Spring Area in Zaozhuang is divided. The map of the karst water resource conservation zone of Shili Spring Area in Zaozhuang on a scale of 1:50000 has been drawn. The countermeasure of sustainable use of karst water resource is provided.6 The harms of the karst collapse disasters is summarized. The measures of prevention and cure of the karst collapse of North China has been presented.