武开河的边界约束判别准则

Boundary constraint criterion for onset of mechanical ice-cover breakup

根据封冻河道春季冰盖破裂机理，采用弯曲河道边界约束概念，提出可用于预测武开河发生的判别准则，并对其适用性进行了论证。应用黄河河曲段1985—1994年的原型观测资料对该判别准则进行验证，结果表明该准则可以较好地用于河道武开河的判别。

Based on the mechanism of ice-cover fractures in an ice-covered river, the criterion applied to predict the mechanical ice-cover breakup is presented using the concept of boundary constraints in channel bends. The applicability of this criterion is demonstrated. The prototype observation data from the Hequ Reach of the Yellow River from 1985 to 1994 are used to validate the criterion. The results show that the criterion can appropriately forecast the onset of ice-cover breakup.