江苏如东北部水产养殖区地面沉降现状分析与防控建议

Status and prevention and control suggestions of land subsidence in aquaculture area of northern Rudong,Jiangsu Province

江苏如东北部水产养殖区自规模化运营以来,长期对区内浅部地下水进行集中式开采,区内地下水水位持续下降形成水位漏斗,继而导致地面沉降的发生,是苏北地区典型水产养殖引起的地面沉降区,为全省地面沉降研究新的拓展区和实践区。根据2017—2020年度高精度InSAR监测数据,圈定研究区地面沉降重点沉降区及影响范围,通过39个开采井水位统测数据对比研究,证实区内地下水水位漏斗与地面沉降展布形态和特征具有较好的一致性,科学佐证了地下水开采是研究区地面沉降形成的主要诱因。

Since the large-scale operation of aquaculture area in northern Rudong,Jiangsu Province,the shallow groundwater in the area has been exploited for a long time,and its groundwater level continued to decline to form a water level funnel,leading to the occurrence of land subsidence.It is a typical land subsidence area caused by aquaculture in northern Jiangsu,and also a new expansion and practice area for land subsidence research in the province.The key subsidence areas and the impacted areas in the study area have been delineated according to the high-precision InSAR monitoring data from 2017 to 2020.Through comparative study of the water level data of 39 mining wells,it is confirmed that the groundwater level funnel in the area has a good consistency with the distribution pattern and characteristics of ground subsidence,which proves that groundwater exploitation is the main cause of land subsidence in the study area.