Relationship between land subsidence and hydraulic head under Jacob assumptions

CORC > 广州地球化学研究所 > 中国科学院广州地球化学研究所 > 中科院广州地化所(-2008)

	Relationship between land subsidence and hydraulic head under Jacob assumptions
	Ran XL; Xia B
	2003-11-09
会议日期	2003-11-9
会议地点	WUHAN, PEOPLES R CHINA
英文摘要	A time-space distribution of large-scale land subsidence resulted from groundwater extraction frequently corresponds terrifically to that of groundwater level, which always behaves like a descent funnel, in a plain or basin region. In this paper, a theory of linear functional relationship between land subsidence and hydraulic head drawdown is developed under Jacob assumptions and then verified and perfected by cases study. The theoretical research and the cases study indicate: drawdown can lead to land subsidence; land subsidence value depends on not only the drawdown but also thickness and skeletal elastic specific storage of vertical compaction layer; just like seepage starts to happen in clayed formation only if hydraulic head gradient is greater than the initial, an initial drawdown is needed to start up the vertical water release and compaction; the vertical compaction of clayed formations satisfies Jacob assumptions; the vertical compaction formations consist mainly of clayed layers and interbeds, which coincides with the research conclusion of Thomas J. Burbey, Virginia University, on major directions of deformation of water-bearing deposits; land subsidence is mostly resulted from the vertical compression strain of clayed water-bearing deposits.
会议录	International Symposium on Water Resources and the Urban Environment
语种	英语
内容类型	会议论文
源URL	[http://210.77.94.230:8080/handle/344008/9409]
专题	广州地球化学研究所_中科院广州地化所(-2008)
推荐引用方式 GB/T 7714	Ran XL,Xia B. Relationship between land subsidence and hydraulic head under Jacob assumptions[C]. 见:. WUHAN, PEOPLES R CHINA. 2003-11-9.