凌汛,俗称“冰排”。冰凌堵塞河道,对水流产生阻力而引起的江河水位明显上涨的水文现象。水面结冰的河道,上游河冰先融,下游河道尚未解冻,易出现“凌汛”。主要受气温、水温、流量与河道形态等几方面因素的综合影响而形成,可能导致堤防溃决,洪水泛滥成灾。中国北方的河流,如黄河、黑龙江、松花江,在冬季的封河期和春季的开河期都有可能发生凌汛。黄河凌汛洪水在发生频次和规模上远较其他地区为高,往往造成较大灾害。凌汛期一般需采取破冰措施,防漫堤决口,酿成灾害。 (概述图参考来源: )
文章详细信息 关键词: 凌汛;;防凌措施;;2010—2011年度;;宁蒙河段;;黄河 [gap=1014]Keywords: ice flood;ice flood control measures;2010-2011;Ningxia-Inner Mongolia reaches;Yellow Rive..
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再次,进行凌汛期磴口黄河大桥的动力特性分析。
Again, the self-vibration characteristics of the Dengkou Yellow River grand bridge in the melting ice flood season was analysis.
该模型准确率较高,物理成因概念明确,凌汛最高水位模型其精度都在90%左右。
The accuracy of the model is higher. The conception of physics factor is clear and definite. The precision of the highest level of ice dam is about 90%.
并利用GIS较为完善的空间分析与运算功能,进行凌汛期凌险的实时动态监测预警;
On this foundation, the real-time dynamic monitoring and early warning system of ice run has been practiced by using GIS excellent function on space analysis and operation.
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