Laboratory;
ofEcohydrology;
oflnland;
River;
Basin,;
Cold;
and;
Arid;
Regions;
Environmental;
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Engineering;
Research;
Institute,;
Chinese;
Academy;
of;
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Lanzhou;
730000,;
China;
Key;
Laboratory;
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Frozen;
Soil;
Engineering,;
Cold;
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Regions;
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Engineering;
Research;
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Chinese;
Academy;
of;
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Lanzhou;
730000,;
China;
Upstream;
Watershed;
Ecology-Hydrology;
Experimental;
Research;
Station,;
Cold;
and;
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Regions;
Environmental;
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Engineering;
Research;
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Chinese;
Academy;
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水分来源; 地表径流; 同位素比值; 黑河流域; 上游; 组成; 证据; 降水量;