北方受季节性冻土影响，解冻期、化通期产流过程与物理机制有所不同。根据宾县径流实验站实验资料，对实验区解冻期产流计算方法进行探讨。１　冻土对产流参数Ｗｍ　Ｅｍ的影响解冻初期，解冻深度Ｈ小，包气带薄，流域平均最大蓄水Ｗｍ小。随着Ｈ的增大，包气带增厚，Ｗｍ也逐 Affected by the seasonal frozen soil in the north, the process of thawing and normalizing runoff are different from the physical mechanism. According to experimental data of runoff station in Binxian County, the calculation method of runoff in thawing period in experimental area was discussed. 1 Influence of permafrost on runoff parameters Wm Em The thawing depth H is small and the entrainment zone is thin and the average maximum water storage Wm is small in the initial period of thawing. With the increase of H, aeration zone thickening, Wm also by