Study on the situation and evolution trend of karst water pollution in Xingtai City

Surface water pollution and solid waste disorderly piling up have led to contamination of karst groundwater in many places in Xingtai City and the polluted scope is continually enlarged, which is severely threatening water safety in downstream. On the basis of a large number of water quality monitoring data, the pollution situation of karst water was analyzed, two tendencies of groundwater pollution are predicted by means of numerical method under the circumstance of the polluting sources being controlled or the polluting sources still existing, and the impact of water pollution on water source is analyzed too. Predictions indicate that, if polluting sources still existing, the isoline of out of limits Cr6+ concentration will diffuse at the speed of 0.769 m/d; if polluting sources being controlled, the diffusing speed will reduce to 0.402 m/d. So, it thus clear that polluting sources treatment is of important role to slow down the diffusion of contaminants. The predicted results can be chosen as the basis for groundwater protection and pollution control.