利用多元回归统计方法，分析黑龙江省呼兰河和汤旺河流域森林覆被率、单位面积立木蓄积对融雪径流量和融雪输沙量的影响。结果表明森林能增加融雪径流量，减少融雪输沙量。而趋势分析结果显示了两个流域融雪径流量呈减少趋势，这与研究地区森林资源变化的趋势一致。因此，植树造林是增加融雪径流量，减少东北地区春耕干旱的一项有效措施。

The influence of forest coverage and stand stock per unit area on snowflow and snow sediment in Hulan River and Tangwang River basins in Heilongjiang Province were studied by multiple regression method. The results showed that forest increase snowflow discharge and reduce snow sediment load. The snowflow discharge of this two basins appeared to have the trend of decline from the results predicted by trend analysis method, they were consistent with the tendency to the forest resources change trends. So afforestation is an effective way to increase snow flow for decreasing drought on spring ploughing in northeastern China.