冰坝,是我国北方严寒地区江河解冻期常见的一种自然现象。由于它的影响因素比较复杂,野外观测又较危险,因此,冰情预报一直是水文预报中的薄弱环节。为了防凌,1978年黑龙江省水文总站在松花江下游的依兰河段,建立了一个冰坝实验研究站。这个站曾就依兰河段的野外观测资料,结合 Ice dam, cold frost in northern China is a common phenomenon of the natural river. Because of its complex influencing factors and field observations, the ice forecast is always the weakest point in hydrological forecasting. In order to prevent Ling, in 1978 the Heilongjiang Hydrological Station in the downstream of the Songhua River in the Yilan section, established a ice dam experimental research station. This station has been on the Yilan section of the field observation data, combined