Abstarct: BarmeShour pond is one of the most important wetlands, located in the Khuzestan province. The main aim of this study was to evaluate hydrogeology and hydrogeochemistry of Barme Shour Pond. The greatest depth of the pond during the dry season (September) is sited in the central portion, which is about 3m. Given the wide exposure of traditional evaporation formation and high solubility in the region, karstic features, including Sinkhole, cavity dissolution, dry valleys, shafts and caves and etc, are visible, indicating development of gypsum karst in the study area. The annual water budget between the Pond and adjacent ground water is 109512 m3 which is transferred through the karst limestone and gypsum into the Pond area, rendering a possible hydraulic connection between the adjacent Asmari anticline and the pond. EC values of the pond water changes from 1498µs/cm in July to 4290 in April. The pH values do not show any particular trend ranging from 6.4 to 8.8. Water type in all water samples was Ca-SO4, indicating gypsum dissolution due to the extensive outcrops of Gachsaran formations in the study area. Direct trend between calcium and sulfate ions also suggested the dissolution of gypsum in the region. baxsed on the Gibbs diagram, weathering and dissolution carbonate formation (interaction of water and rocks) were determined as the main effective processes in the chemical composition of the pond’s water. baxsed on the different WHO and FAO water standards, the pond water does not have the necessary quality for drinking and irrigation. Barme shour pond water samples are contaminated with AS, Zn, Pb according to the WHO standard, while it is suitable for irrigation baxsed on the FAO standard limit.