论文部分内容阅读
利用GIS集成分析深层地下水、钻孔和水准观测等资料,揭示了黄河三角洲地区尤其南部广饶井灌区形成的大面积深层地下水水位降落漏斗时空演化规律及抽水引发的地面沉降特征.东营和广饶地面沉降漏斗与深层地下水降落漏斗分布相一致,中心沉降量和速率分别为155.1mm、28.2mm/a和356.0mm、64.7mm/a.在深层地下水下降速率为2m/a的情况下,运用土力学模型分层计算黄河三角洲沉降量,第二、三压缩层年最终压缩量分别为36—63mm和98—138mm,已成为黄河三角洲地面沉降主要贡献层.
Using GIS integrated analysis of deep groundwater, borehole and level observation, the temporal and spatial evolution of large-scale deep groundwater level falling funnel formed in Guangrao well irrigation area in the Yellow River Delta and ground subsidence caused by pumping are revealed. Land subsidence in Dongying and Guangrao The funnel is consistent with the distribution of deep groundwater descent funnels, and the center settlement and velocity are 155.1mm, 28.2mm / a and 356.0mm, 64.7mm / a, respectively. Under the condition of deep groundwater descent rate of 2m / a, The settlement of the Yellow River Delta is calculated by stratification. The final compression amount of the second and third compression layers are 36-63mm and 98-138mm respectively, which has become the major contribution to ground subsidence in the Yellow River Delta.