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采用PS-InSAR技术对覆盖廊坊北部地区的33景Envisat ASAR影像进行处理，获取该地区2007～2010年平均形变速率场与季度时序沉降信息，并与沉降影响场数据进行耦合分析。结果表明： 1)宋庄-燕郊与五百户-大口屯等地区沉降发育较显著，季节性变动特征明显；2)山前与杨各庄-马坊地区呈高沉降梯度，平原区较高沉降梯度区多与-16 mm/a、0 mm/a等值线形态一致，差异性沉降特征显著；3)因第四系厚度、结构显著差异与断裂活动影响，北、东部断层两侧多表现为较高或渐变的形变梯度；4)差异性沉降展布与水源地、水位降深区具较好空间响应，且较严重沉降多为中深层承压水超采与城镇化建设所致。 相似文献
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利用多时相InSAR(multi-temporal InSAR,MTI)技术,以河北廊坊市城区为试验区,利用两个Track覆盖的SAR数据获取了该地区2007～2010年间的高精度地面沉降速率场。结果表明,廊坊市中心城区存在一个非常明显的沉降漏斗,其最大地面沉降速率为76.0mm/a。在此基础上,利用自由应力下的体积应变模型进行地下水体积变化反演,显示该地区的体积变化最大达到-1.15×10-4/a,整个研究区的地下水年抽取体积达554万m3。 相似文献
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Jinzhong GONG Shujuan SHI Sichao JIN Jinsheng WANG 《中国地球化学学报》2006,25(B08):92-92
Through systematic sampling and analysis of water and soil in the planning area of Langfang City, employing national environmental quality standards, the qualities of groundwater and surface-water was overall evaluated. On the whole, the quality of deep-level groundwater was better and hazardous substances were not superstandard, F is higher, Fe and Mg was superstandard in several sites. The quality of shallow groundwater was general worse and COD, Fe, Mn, NH4^＋-N, F, total hardness, total dissolved solids etc. overstep drinking water standard; the quality of surface water was worst and many indices were evidently higher, which was very worst in the east of downtown. Main pollution way of water body was lixiviation type of primary pollution groundwater and infiltration type of secondary pollution groundwater. Environmental quality assessment of plough layer soil indicated that it was better in the northwest and worse in the southeast, furthermore from Xiwu, Daguanzhang, Zhougezhuang to Pengzhuang, Dazhaolin and the north of Jingshan railroad, the environmental quality is worst. 相似文献