Abstract
Due to the greenhouse effect, the climatic change that may alter the water cycle regime is now becoming recognized. On the other hand, the groundwater environment is getting worse and people are discouraged, although groundwater plays an important role as base flow of river discharge and as water resources.
Recently, the term water cycle is frequently used in the water policies by governments that attempt to establish a sustainable water environment. The groundwater hydrologists and engineers, therefore, need to take actions.
In the present article, discussions are made on what the experts of groundwater hydrology should do in order to implement the proposed policies. Specifically emphasis is put on how the groundwater expert contributes as an interface between the targeting goals and the actual water environment.
