河北省献县地面沉降易发性分区及防治建议

Zoning and prevention suggestions for land subsidence susceptibility in Xian County， Hebei Province

摘要:

地面沉降是当今危害较大的一种地质灾害，严重影响区域内建设规划、经济、环境和社会协调发展，对城市发展及人类生命财产安全均有较大危害。献县位于河北省沧州市西部，是地面沉降发育较严重地区，是全国重点蓄滞洪区之一，对献县地面沉降进行易发区划分采取精准防控具有重要意义。本文通过选取深层地下水位、浅层地下水位、第四系厚度、累计沉降量、沉降速率、路网密度6个影响因子，以评价区各乡镇为评价单元，通过灰色关联度法确定地面沉降影响因子权重，利用ArcGIS空间分析功能进行叠加分析，对献县区域进行地面沉降易发性分区，同时提出了防治建议，为地面沉降科学防治提供依据。

Abstract:

At present， land subsidence is a geological disaster with significant harm， which seriously affects the coordinated development of regional construction planning， economy， environment， and society， and poses a significant threat to urban development and human life and property safety. Xian County is located in the western part of Cangzhou City， Hebei Province， and is an area with severe land subsidence， which is one of the key flood storage and detention areas in China. Therefore， it is of great significance to classify the prone areas of land subsidence in Xian County and adopt precise prevention and control measures. In this paper， six impact factors namely deep groundwater level， shallow groundwater level， Quaternary thickness， cumulative settlement， settlement rate， and road network density are selected， and each township in the evaluation area is taken as the evaluation unit， the weight of land subsidence influencing factors is determined by the gray correlation method， and the superposition analysis is carried out by the spatial analysis function of ArcGIS to partition the land subsidence susceptibility in Xian County in order to provide suggestions and basis for the scientific prevention and control of land subsidence.