Study on ecological storeroom of water in the watershed

The mediums and the places of the water evolvement have formed the ecological storeroom of water(ESW).Based on the analysis of the primary theory of ESW,the evolution and variation of the ESW in the East Liaohe river basin(ELRB) are analyzed with the key desktop of GIS.The ESW provided by river system is 204.08mm in the ELRB and 39.83% of the multi-year average precipitation.The one-time ESW provided by slop system in the ELRB is 97.35mm and 19.48% of the ecological water requirement by slop system and 47.70% of the ESW provided by the river system.The ESWs provided by river system and slop system have features of spatial variation.The total ESW in the ELRB has high value network centered with the channel and the high value island centered with lakes and reservoirs.