Groundwater Dynamic Evolutions and Relationsgip between Groundwater Level and Land Subsidence in tge Yellow River Delta
Liu Yong
Li Peiying
Feng Aiping
Huang Haij un
Abstract：To analyze the groundwater dynamic and the relationship between groundwater level and land subsidence in the Yellow River Delta,drastic groundwater level depression and serious land subsidence have been researched by monitoring data of groundwater level and land subsidence for years.Persistent groundwater overexploitation has resulted in groundwater depression cones in both shallow and deep aquifers successively.The deep groundwater level decline rate of cone centers is 2 to 3 m/a.In recent years,Dongying and Guangrao exhibit a typical subsidence area with cumulative settlement and subsidence rates of 155.1 mm,28.2 mm/a and 356.0 mm,64.7 mm/a,respectively.Using GIS and mathematical statistics,it is found that configuration of the subsidence cone is basically identical to the shape of the deep groundwater depression cone,and there exists a significant linear positive correlation between deep groundwater level and elevation in deep groundwater depression cone,with the correlation coefficient of 0.92.The deep groundwater overexploitation has been the most essential factor to land subsidence.The third compressed layer has become the main contribution layer of land subsidence in well-irrigated area. Because water level at centers of deep groundwater depression cone has fallen below critical water level of the third confined aquifer,land subsidence is becoming more and more serious.
Keywords：the Yellow River Deltawater levelgroundwater depression coneland subsidenceenvironmental geology
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：11( 1555-1565 )