Research on spatial-temporal evolution of wetland water resource in Zhalong nature reserve

As an important and complicated ecosystem, wetland has an obvious modulation function on environment. The biologic diversity of wetland has led to public attention. More investigation has been carried out. Water is vital to the formation, existence and evolution. Abundance of water impacts the environment of inner and outward wetland. Generally, the parameters reflecting the surface water resource contain two parts. One is rainfall, the other is runoff. In this paper, the temporal and spatial pattern of Zhalong wetland surface water resource in recent 50 years is discussed based on the observation data and TM image. GIS spatial analysis technique is used to appraise the temporal change of rainfall with the observation data and SCS model is used to appraise the temporal change of runoff. A LUCC model is used to analysis the spatial evolution of water resource with TM image