Abstract:

Groundwater is the unique source of drinking water and irrigative water in Karst region. The geochemistry of ground water varies obviously throughout a year. By analyzing the geochemistry of groundwater in Caoshang Karst valley, the authors found that the geochemical property of groundwater exhibited an obvious seasonal change. Some indexes, including specific conductivity, total dissolved solid, and the concentration of SO\-4\+\{2-\} and HCO\-3\+-, were higher in August than those in November. The change was correspondent with the variation of natural conditions because the temperature and precipitation were higher in August than in November in Caoshang Karst valley. Furthermore, the intensity of land use can affect the geochemistry, as anthropogenic activities are normally condensed in August than in November. This paper provides some useful information for understanding the relationship between groundwater and human activity.

Key words: paralleled ridgevalley of East Sichuan, Karst groundwater, geochemistry property, seasonal change, land use