Unascertained risk analysis of groundwater allowable withdrawal evaluation;

Risk analysis of groundwater allowable withdrawal evaluation;

In groundwater allowable withdrawal evaluation, the traditional method is based on determination model.

Based on an analysis of chemical environment and dynamic environment evolution of groundwater system,the allowable yield of karst water resources is estimated to be 41 000 m3/d through the numerical model of groundwater currents and this paper also provides countermeasures and decisions to prevent karst collapses and other water environment problems,such as controlling.

Then the shallow groundwater allowable yields are obtained in the water source using water balance method with the parameters from testing.

Based on karstic water hydrogeological features and hosting pattern,the paper discussed water head site allocation,permissive mining yield and mining technical condition,figured out the karstic groundwater natural resource is 8.

According to the water supply hydrogeological exploration data of Shouyang area from 1991 to 1998,as well as steady flow pumping test results from Renjiadian mineral water source site,the paper discussed problems around permissive mining yield, groundwater resource environment protection and how to keep away the environment from deterioration during mining for reference in exploitation.

Calculation of groundwater allowable exploitation in water source region in Qingshuihe,Inner Mongolia

In view of this situation, based on generalizing of the complicated geological and hydrogeologic conditions in Fuzhou, a quasi-three-dimensional finite element numerical simulation of the geothermal water system is made in the paper, The allowable exploitation is also assessed and predicted.