黄河上游生态水文特征变化及降水量分析文文 畅成喜 潘祖莹黄委上游水文水资源局 730030【摘要】:河流生态水文特征是河流生态水文响应机制的外在表现,分析河流生态水文特征变化是建立河流生态水文指标体系的基础。黄河上游生态水文系统中改变强烈的生态水文要素主要分布在径流要素的年际和年内变化、最大最小极值的大小及出现时间、大小洪水和变化率等方面。【关键词】:黄河上游;生态水文;;特征变化;降水量;[ Abstract ]: River eco hydrological characteristics of river ecological hydrological response mechanismof the external manifestations, analysis of river ecological hydrological characteristic change is toestablish the basis of index system of river ecological hydrology. The upper reaches of the Yellow Riverecological hydrological system change strong ecological hydrological elements are mainly distributed inthe runoff elements of the annual and seasonal change, maximum minimum size and occurrence time,size and the rate of change of the respect such as flood.[ Key words ]: the upper reaches of the Yellow River; the ecological characteristics ofprecipitation;change;