现代黄河三角洲地区地面沉降的机理分析

Mechanism analysis of land surface subsidence in the modern Yellow River Delta

利用前人在现代黄河三角洲地区进行的大量的野外调查和研究结果,对黄河三角洲地面沉降与第四系沉积体系、构造之间的对应关系进行了研究。研究结果表明现代黄河三角洲地区地面沉降除了因人类活动导致地面缓慢沉降外,新构造运动、第四系沉积相的分布也与三角洲沉降存在很好的相关性。研究区沉降区域的分布与主要断裂带相对应,软土的分布基本上控制了主沉降区的边界。研究结果可为以后三角洲的开发利用和管理以及其他三角洲地面沉降或地质灾害的监测提供必要的基础资料。

Based on the results of the field investigation and research on the modern Yellow River Delta done by the former, the correlativity between the depositional system of Quaternary, tectonics and land surface subsidence in the modern Yellow River delta is studied. The results showed that the land surface subsidence in the modern Yellow River Delta is related to the neotectonism movement and the distribution of sedimentary facies of Quaternary, as well as the anthropic activity. The distribution of the subsidence extent has a good relationship with the distribution of the main fault belt; the distribution of soft clay almost controls the main subsidence borderline.