摘要
近几年,盘锦地区的地面沉降问题开始受到人们的关注。为了掌握盘锦地区地面沉降现状,包括沉降中心位置、沉降区面积、沉降量、沉降速率等,选取2013-2016年覆盖研究区的19景C波段Radarsat-2 SAR数据,采用SBAS-InSAR技术提取了盘锦地区地面沉降速率和累积沉降量。结果表明,研究区内存在两个沉降区:曙四联沉降区,面积约为43.6 km^2,最大沉降速率为-151.49 mm·a^(-1);龙王村沉降区,面积约为33.28 km2,最大沉降速率为-119.55 mm·a^(-1)。通过地表形变量时序分析,发现两个沉降区的范围随着时间不断扩大,累积沉降量不断增大。与水准监测数据进行对比后发现,两种监测方法得到的沉降区范围和沉降量大体一致,但两者间仍有差别。对研究区内油田井场分布和地下水水位降落漏斗特征与沉降区分布进行了对比分析,研究表明地面沉降与地下水开采、油气资源开采、新构造运动等多种因素具有密切关系。研究结果将为地质环境的管理、地面沉降灾害的防治及资源开发利用规划提供基础依据。
Recently,the land subsidence problem in Panjin region begins to be concerned. In order to find out the current situation of land subsidence in Panjin region,we select 19 Radasat-2 SAR data of C band covering the study area during 2013-2016. We extract the land subsidence rate and cumulative amount of land subsidence in Panjin region using SBAS-InSAR method. The results show that there are two land subsidence centers in the study area. One center is Shusilian subsidence area. Its area is about 43. 6 km2 and its highest subsidence rate is-151.49 mm·a^（-1）. The other is Longwang village subsidence area. Its area is about 33. 28 km2 and its highest subsidence rate is-119.55 mm·a^（-1）. Through time series analysis of accumulative displacement, the land subsidence area expands with time,and the cumulative settlement increases. Compared with the leveling monitoring data,it is found that the settlement range and cumulative amount of land subsidence are generally consiste,but there is still difference between the two monitoring methods. The distribution of oilfield site,the drawdown funnel ofgroundwater level and the distribution of subsidence area in the study area are compared and analyzed. The results show that the land subsidence is closely related to the exploitation of groundwater,the exploitation of oil and gas resources,the new structure movement and so on. This study can provide the basis for the geological environmental management,the prevention and control of land subsidence and the development and utilization of resources.
作者
张静
冯东向
綦巍
周雪
赵玉星
ZHANG Jing;FENG Dongxiang;QI Wei;ZHOU Xue;ZHAO Yuxing(Geological Environmental Monitoring Station of Liaoning Province,Shenyang 110032;Department of Land and Resources of Liaoning Province,Shenyang 110032;Institute of Geology and Mineral Resources Surveying and Mapping of Liaoning Province,Shenyang 110121)
出处
《工程地质学报》
CSCD
北大核心
2018年第4期999-1007,共9页
Journal of Engineering Geology
