封冻期径流成分按补给来源分主要以地下水补给为主。
Based on the supplying resources, ground water was considered as the primary resource to the main runoff in the freezing period.
红色代表变暖的趋势：融冰期提早，封冻期后延，融冰季节变得更长。
Red indicates trends consistent with warming: earlier melt onset, later freezes, and longer total melt season.
根据地下水退水的一般规律，提出了针对天然河道封冻期流量推求方法的建议。
According to the general pattern of ground water lowering, this paper suggested a volume calculation method in the natural river courses in the freezing period.
北部的北德维纳河向北流经1350英里注入白海，全年封冻期竟长达190天。好评(0)。
The northern Dvina (1350 miles), which flows into the White Sea, is ice-blocked for 190 days.
北部的北德维纳河向北流经1350英里注入白海，全年封冻期竟长达190天。好评(0)。
The northern Dvina (1350 miles), which flows into the White Sea, is ice-blocked for 190 days.
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