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作者采用单独流域法对大兴安岭地区12条较大流域河流的水文资料进行统计分析,即在同一流域内因采伐引起森林覆盖率的变化对年径流量和径流系数进行对比研究。结论是在高纬度多年冻土区径流系数有随森林覆盖率的减少而减少的趋势。文章还从水量平衡原理分析了影响年径流的主要因素。
Using a single watershed method, the author conducts a statistical analysis of the hydrological data of 12 major river basins in the Greater Khingan Range. That is, the annual runoff and runoff coefficient are compared in the same basin due to the change of forest cover caused by logging. The conclusion is that the runoff coefficient in permafrost regions at high latitudes tends to decrease with the decrease of forest cover. The article also analyzes the main factors affecting annual runoff from the principle of water balance.