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怀柔应急水源地是北京第一个建成的特大型应急备用水源地,经过数年的开采后,应急水源地水位大幅度下降,地下水漏斗面积不断扩大。PSInSAR技术在监测地面沉降方面具有很大的优势,本文利用PSInSAR技术和2003年—2009年间28幅Enviast卫星的ASAR影像监测怀柔应急水源地地区地面沉降情况,试验结果表明该地区平均沉降量为8mm/a。通过该地区地面沉降状况和地下水漏斗发展趋势之间的对比,发现地面沉降范围和地下水漏斗有较大的空间一致性,平面分布趋势整体上由南西—北东向北西—南东转变。
Huairou emergency water source is Beijing’s first large emergency reserve water source built after several years of mining, the water level of emergency water sources dropped significantly, groundwater funnel area continues to expand. PSInSAR technology has great advantages in monitoring land subsidence. In this paper, PSInSAR technology and ASAR images of 28 Enviast satellites from 2003 to 2009 were used to monitor the land subsidence in Huairou emergency water source area. The experimental results show that the average settlement in this area is 8mm / a. Through the comparison between the land subsidence condition and the development trend of groundwater funnel in this area, it is found that the ground subsidence range and the groundwater funnel have greater spatial consistency, and the plane distribution trend generally changes from south west to north east to north west to south east.