【摘要】 通过对江河源区区域内水环境所包含的大气降水、冰川冻土、地表径流、沼泽湖泊等4个方面的分析,揭示了江河源区水环境变化的规律及其影响因素。结果表明:1降水逐年变化呈现波动,增减不明显,Cv值为0.15～0.55;季节变化呈现"双峰型"曲线,峰值分别出现在7月和9月;2地表径流受降水、冰雪融水及地形等因素的影响,呈"单峰型"曲线;3冰川冻土明显减少,作为径流稳定补给的冰雪融水已出现年际间的丰枯变化;冻土层温度上升0.5～1℃,厚度减小了10～20m;4沼泽湖泊数量急剧减少,面积变小甚至干涸。更多还原

【Abstract】 Through analyzing four aspects about water environment including rainfall,river current,glacier and frozen earth,swamp and lake etc.in the region,this paper discovered its change laws and influencing factors.The result showed that:① precipitation fluctuated in different years,no obvious change,Cv arranged from 0.15-0.55;seasonal precipitation change assumed "double peak value"trend,peak value appeared in July and September respectively;② river current is influenced by rainfall,water from the melting of glacier and frozen earth,and terrain etc,it has shown "onefold peak value" trend;③ glacier and frozen earth lessened obviously,water from glacier and frozen earth melting which is regarded as steady replenishment to river current,has changed much or less between years;the temperature of frozen earth storey had rised 0.5-1 ℃,its thickness thined 10-20 m;④ the number of swamp and lake has reduced sharply,its acreage diminished,even dried up.更多还原