Comparative Study On Hydrological Processes Of Karst Springs In Peak Cluster Depression

Water is the natural resource for life,especially in the Area of Karst Mountain However,it is difficult to use groundwater resources in karst area,so as to provide scientific guidance for the rational use of karst groundwater and the production and use of water for people,In this paper,4 karst springs in the experiment site of Guilin were selected to study the hydrological changes in one hydrological year:(1)In the same study area,there is a big difference in the groundwater storage space and all kinds of water bearing medium,the pipe occupies the main part in spring 31,This confirms that the largest pipeline in the study area is near spring 31,and connected with the S31 spring,seasonal spring 29's pipeline is not obvious,As spring 32 have long supply distances,The time which pipeline supplies is long,this reflects the heterogeneity of karst development(2)In 2016,the supply of Spring 31 in the rainy season is 4x105 m~3,the excretion is 1.7x105 m~3,evaporation capacity is 2.4 x105 m~3,water have been stored-0.8x104 m~3,It's in a negative equilibrium state,2016 is the Flat water year.(3)There are two reasons for seasonal outflow of karst springs in the study area:First,the permeability of the aquifer medium is well,which makes the groundwater dispersed in the spring area,but the water level is lower than the Spring elevation,so there is no water flow out.Second,the spring subsystem is distributed excretion.There are multiple drain outlets instead of concentrating.thus,during the dry season,the water table is below the level of the spring and it has not flowing.(4)Subsurface flow is a water quantity that should not be neglected in karst area,and should be paid more attention to in the evaluation of groundwater resources.