基于SBAS技术的鹤岗市西南地区地面沉降监测研究

Research on Land Subsidence Monitoring in Southwest Area of Hegang City Based on SBAS Technology

鹤岗市西南地区是黑龙江省重要的能源工业区域,由于长期大规模开采煤炭等资源导致地面沉降问题。针对鹤岗市西南地区的地面沉降问题,本文选取覆盖该区域2015年6月至2018年11月的38期哨兵雷达数据,采用小基线集(SBAS)技术,开展该地区地面沉降信息监测,研究该地区的地面沉降的空间分布特征,为该地区地面沉降防控与城市规划提供基础数据与技术支持。研究表明:通过与水准数据对比,利用SBAS技术监测得到的鹤岗市西南地区地面沉降信息的准确性和可靠性更强;鹤岗市西南地区形成大范围、连续的地面沉降区,且沉降严重,可监测到沉降速率达-236.8 mm/year;2015年2018年沉降区范围先增后减,且将持续下沉。

The southwest area of Hegang city is an important energy industrial area in Heilongjiang province.The land subsidence problem is caused by long-term large-scale mining of coal and other resources.For the land subsidence problem in the southwest area of Hegang city,the small baseline set(SBAS)technology was used,and the 38 Sentinel-1A/B radar images covering the region from June 2015 to November 2018 were used to obtain land subsidence in the region,study the spatial distribution characteristics of land subsidence in the area,and analyze the settlement effect by using the special data such as roads and railways,which provides basic data and technical support for land subsidence control and urban planning.The results show that the accuracy and reliability of SBAS for obtaining ground subsidence information in Hegang city are more accurate and reliable compared with the level data.In the southwest area of Hegang city,a large-scale and continuous land subsidence area is formed in the east of the city’s main urban area,and the settlement is serious,and the sedimentation rate can be monitored to reach-236.8 mm/year.The range of settlement areas will increase first and then decrease from 2015 to 2018,and will continue to subside.