Assessment of Groundwater Resources Carrying Capacity in Karst Areas:Taking Guizhou Province as a Case

Karst basin has a special surface(the ground floor of a double dielectric structure),and its groundwater resources carrying capacity in karst and non karst areas has a huge difference.This paper selected 7 evaluation indexes such as the rate of groundwater resources for irrigation of farmland,rate of groundwater resources exploitation,ecological environment and etc.,to establish an integrated evaluation model of groundwater resources carrying capacity in karst areas based on the variable fuzzy set theory.The evaluation results show that the groundwater resources carrying capacity in karst areas of Guizhou stay at 1～2 level,which indicate that the groundwater resources have been considerably developed and utilized,but there are still some potential for the development and utilization.Finally,gray relational analysis was made between population,GDP,volume of groundwater resources in karst area and the results of comprehensive evaluation.The results show that the 4 factors and groundwater resources carrying capacity in karst areas have a certain relationship.The order of the degree of correlation is that GDP volume of groundwater resources Population Karst area distribution.Distribution area of karst has influence on the groundwater resources carrying capacity.With the economic development in karst areas,scientific and technological progress,as well as improvement in water use,impact of karst on groundwater resources carrying capacity will gradually decrease.