岩溶塌陷区划的迭置分析方法和宏观减灾对策研究

OVERLAP ANALYSIS OF KARST LAND COLLAPSE AND STRATEGY FOR HAZARD REDUCTION

以唐山市岩溶地面塌陷区为依托，提出了单因子图迭置分析的岩溶地面塌陷危险区划分原则和方法，编制了相应的软件系统ＫＬＣ，并对唐山市城市岩溶塌陷进行了综合分区评价。以此为基础对岩溶塌陷宏观减灾对策进行了探讨。提出了以防止岩溶塌陷为目的的地下水优化管理方案，使地下水状态在岩溶地面塌陷危险区形成最不利于塌陷产生的水动力状态，以实现全区塌陷危害最小的目的。

A new principle and method, namely overlap analysis of single factor map, for karst land collapse classification is presented in this paper. A corresponding computer program named as KLC (Karst Land collapse Classification) is created this new method is applied to the urban area of Tangshan city for the classification and evaluation of karst land collapse hazard since the key factor that causes land collapse taking place in Tangshan is the overdraft of ground water, a optimal ground water management plan for the reduction of karst land collapse hazard in macroscopic sense is proposed by optimal control of ground water state in the area that has the danger of collapes, the possibility of collapse can be greatly reduced in overall scale.