流域水生态空间研究

Study on ecological storeroom of water in the watershed

摘要: 在分析水生态空间基础理论的基础上,以东辽河流域为例,以GIS技术为关键的数据处理平台,分析了流域地表水生态空间的演化分异。东辽河流域单位流域面积河流系统所提供的水生态空间为204.08mm,是流域多年平均降水量的39.83%;流域多年平均次坡面水生态空间为97.35mm,是坡面系统生态需水的19.48%,是流域河流系统水生态空间的47.70%。流域河流系统水生态空间和坡面系统水生态空间均具有明显的地域分异特征;全流域水生态空间形成了以河渠网为中心的高值分布网和以湖库为中心的高值分布"岛"。

Abstract: 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.