90年代以来，珠江三角洲网河区大部分水位站同级流量的洪水位普遍下降的同时，局部河段洪水位却异常壅高。

In the 1990s, the flood water level was lower than before at most stations in the river network of the Pearl river delta under the same grade of runoff.

国家气象台曾预报红河将上涨到洪水位以上19英尺。

The National Weather Service had predicted that the river would crest to about 19 feet above flood stage.

因此，研究不同潼关高程对渭河下游冲淤及洪水位的影响具有迫切而重要的现实意义。

Accordingly, it is urgent and important to study the effect of different Tongguan riverbed elevations on aggradation and degradation as well as the flood elevation of the lower Weihe river.

基于推求的洪水位频率曲线，将堤防水文失事风险分为洪水漫溢风险和洪水漫顶风险。

Based on the flood level frequency curve, hydrological failure risk was divided into flood overflowing risk and flood overtopping risk.