采用随机水文学方法对嫩江流域1956~2000年的年径流量序列演变特征进行分析。结果表明,嫩江流域径流的水文周期是32a,整体而言,45a径流序列不存在明显的趋势性。此外,对嫩江流域用水性消耗程度进行分析。结果表明,人类用水性消耗量对流域水循环整体影响程度为5%,但是在流域内部影响程度存在较大差异。洮儿河子流域影响因子达到16%,反映该地区人类取用水消耗量较大。从年际分析,整个流域在70年代的影响因子要高于其它年段,呈现出越是枯水年段人类用水影响程度越大的现象。
This paper analyzed evolutionary features of annual runoff of the Nenjiang River Basin during the 45 years between 1956 and 2000, by applying random hydrologic method.The research indicated that hydrologic cycle of runoff in the basin was 32 years.On the whole, there existed no apparent runoff trend within the 45 years.Furthermore, the paper also studied consumable water usage of the basin, and it showed that the general impact extent of mankind water consumption to basin water cycle was 5%, but it varied greatly within the basin, such as the case of the Tao’er River Basin, rising to as high as 16%, showing greater mankind water consumption there.In terms of annual runoff analysis, impact factor during the 1970s in the whole basin was higher than any other decades, reflecting the fact that mankind water consumption exerted greater impact on water cycle during low flow period.
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