Method for determining hydrogeological parameters of aquitard

Abstract

The invention discloses a method for determining hydrogeological parameters of an aquitard. The method includes deducing an analytical solution of a flow formula of the unit horizontal area of the aquitard under the condition that a water head of one side of a cylinder of the aquitard is decreased by a certain constant; and then providing experimental data on the basis that flow varies along with time, and determining a conductivity coefficient, a permeability coefficient and a water storage rate of the aquitard by a curve fitting method. The analytical solution deduced in the method is rigorous in theory, an experiment device and an experiment process are simple and are easy to operate, the parameters are determined by the curve fitting method, the method is easy to control; the large quantity of parameters including the conductivity coefficient, the permeability coefficient and the water storage rate of the aquitard can be obtained by one experiment; and the flow is measured easily, errors are low, and accordingly precision of the obtained parameters is high. Accordingly, the method has high popularization and application values.

Description

technical field [0001] The invention relates to a method for determining hydrogeological parameters of an aquitard, in particular to a method for determining hydrogeological parameters such as conductivity coefficient, permeability coefficient and water storage rate of an aquitard. Background technique [0002] With the acceleration of urbanization, resource and environmental problems related to groundwater are becoming more and more serious. In the Yangtze River Delta of China alone, the area of ​​land subsidence greater than 200mm caused by overexploitation of groundwater has accounted for one-tenth of the area, and the largest cumulative subsidence has reached 2.80m, which has caused economic losses of 50 billion U.S. dollars; groundwater pollution is also From the upper aquifer to the deep expansion. All of these are closely related to the hydrogeological properties of the aquitard, an important component of the aquifer system. The hydrogeological parameters of the aqu...

AI Technical Summary

Problems solved by technology

However, the methods for determining the hydrogeological parameters of the aquitard adjacent to the aquifer have been seldom studied. This is because we have always considered the aquitard to be an aquitard or a relatively aquitard, and its contribution to the amount of water resources Therefore, the aquitard is often neglected or treated as a boundary; on the other hand, there is also a lack of an effective principle and method that can be used to directly determine these factors in the field or indoors. parameter

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