Study On The Groundwater Circulation Model Of The Karst System Of The New Village In Yunnan

The groundwater utilization of new village is low.It is of great significance for the reasonable exploitation and utilization of water resources, and easing the impact of drought on the local area to understand the groundwater circulation pattern.According to the groundwater flow, the new village is divided into three areas.The heavy carbonate sulphate type water and sulfuric acid carbonate type wate in the study area are mainly based on the chemical analysis of water, which is the main type of groundwater in the study area.Na⁺, Ca²⁺, HCO₃^- is the dominant ion and the correlation coefficient of HCO₃^- and Ca²⁺ is very high. Na⁺ is considered as the main source of atmospheric precipitation and after the precipitation into the underground through a very strong water soluble and cation exchange adsorption.The main mineral saturation of groundwater was calculated by Aquachem and the main mineral saturation of groundwater was calculated by Aquachem.The more close to the end of the discharge zone, the greater the mineral saturation.It is sad that with the flow of groundwater, the main mineral components in the area are dissolved.The slope and intercept of the 18 O curves are close to the local atmospheric rainfall by using the isotope method.It is show that the groundwater recharge in the area is derived from the atmospheric precipitation, and the evaporation intensity is weak.The dynamic changes of the spring flow and the dynamic process of the local precipitation are also explained.The study area of various types of water in the delta D, Delta 18 O curves in the overlapping shows that the mutual transformation of various types of water.Through the analysis of the dynamic characteristics of the water chemistry and isotope groundwater, the characteristics of the filling of the spring region are obtained.That the groundwater recharge is mainly based on the rapid vertical recharge.The surface water runoff is short and the depth of circulation is shallow.The regional karst water flows in the form of pipe flow, and the runoff is longer.Bedrock fissure water runoff is short, the circulation depth is shallow, and the runoff is relatively slow;Drainage mode in the karst spring concentrated discharge.The central spring area mainly excrete in Ironwork spring field and New Ironwork spring.The eastern spring area mainly excrete in the Longtan spring.Finally, the water resources evaluation of the research area was carried out by the method of base flow and groundwater quality evaluation criteria.That area exploitable water resources amount to 3484.358 * 104 m fand /a.Water quality is better and belongs to class I or II wate.According to the characteristics of water resources in the study area, reasonable suggestions are given.