Abstract:Stream is complex three dimensional ecosystem, in which the interface of interaction between surface-water and groundwater influenced the exchange of water and solutes between stream surface-water and groundwater. In recent 10~20 years, a previously unrecognized habitat, the hyporheic zone, has been recognized as a critical component of many streams. The studies on hyporheic zone has revealed the significance of hyporheic zone in structure component, function and processes of stream ecosystem. Hyporheic zo...