›› 2007, Vol. 28 ›› Issue (2): 399-403.

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Effect of strata heterogeneity on spatial pattern of land subsidence in Taiyuan City

SUN Zi-yong1, MA Teng1, MA Jun2, MA Rui1, YAN Chun-miao1   

  1. 1. School of Environmental Studies, China University of Geosciences, Wuhan 430074, China; 2. Xinjiang Investigation and Design Institute for Water Resources, Urumchi 830094, China
  • Received:2005-04-05 Online:2007-02-10 Published:2013-08-28

Abstract: Land subsidence has caused serious and costly damage to the Taiyuan City. Some previous researches attributed the problem to excessive withdraw of groundwater. However, the explanation was challenged by the noncoincidence of the spatial patterns between land subsidence and groundwater exploitation. The monitoring data in the period of 1956-2000 show that the land subsidence spatially coincides with the groundwater depression on the whole, but deviates locally. In the present study, spatial heterogeneity of medium is used to explain the phenomena. The following factors are taken into account: patterns of accumulated clay soil thickness, configurations of clay soils and coarse soils, and mechanical properties of soils in different sub-zones and depths. It is found that: (1) the land subsidence centers deviate from the corresponding groundwater depression centers to the sides with thicker accumulated clay soils; (2) in the same intensity of groundwater withdraw, the subsidence volume is usually greater where clay interbeds are more and the individual interbed is thinner; and (3) the land subsidence is correlated closely with the mechanical properties of soils.

Key words: land subsidence, groundwater depression, clay soil, strata configuration, mechanical property

CLC Number: 

  • O 333
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