基于MIKE21模型的六股河口三角洲行洪安全分析

Analysis on flood discharge safety of Liuguhe River Delta based on MIKE21 model

本文利用MIKE21二维数学模型对六股河口行洪进行模拟计算,旨在分析河道内建筑物对河口行洪安全的影响。模型计算流量从上滩流量向上逐次递增至各保护村屯保证流量,通过计算得出各村屯现状及天然情况下的防洪能力,量化建筑物对河道行洪能力的影响程度。另外,通过给定不同计算条件,模拟了多种清障措施的实施效果,初步评估了不同清障方案对河口行洪安全的影响。

In this paper,the MIKE212-D mathematical model is used to simulate the flood discharge of Liuguhe river estuary,in order to analyze the influence of the buildings in the river channel on the flood discharge safety.The model calculated the flow from the upper shoal flow upward to the guaranteed flow of each protected village.Through calculation,the current situation of each village and its flood control capacity under natural conditions were obtained,and the degree of influence of buildings on river flood discharge capacity was quantified.In addition,by setting different calculation conditions,the implementation effects of various measures are simulated,and the effects of different schemes on the safety of estuarine flood discharge are preliminarily evaluated.