摘要
本文以对小滩坡蓄滞洪区新建铁路后所作的防洪评价计算为实例，介绍了蓄滞洪区启用时，新建铁路上下游两个蓄水单元间的水体交换即流量过程的计算分析方法。整个蓄滞洪区以新建铁路为界分为上、下游两个蓄水单元，铁路桥涵过流能力按宽顶堰计算，根据上下游蓄滞洪区水位一面积～库容关系，采用试算法计算蓄滞洪区洪水流量过程。计算得到了蓄滞洪区两种工况下的洪水流量过程，结果显示新建铁路对小滩坡蓄滞洪区的防洪能力影响甚微，蓄滞洪区能够最大限度地发挥蓄滞洪水的能力。本文对于小滩坡蓄滞洪区内修建铁路后的洪水演进过程的计算，方法简单实用，对于相似蓄滞洪区的防洪评价计算有一定参考价值。
A flood control evaluation is made after railways are newly built in the Xiaotanpo flood detention basin. In this article, it is taken as an example to introduce a method to analyze and calculate the discharge process between the upstream and the downstream water storage units, when the flood detention basin is enabled. The whole flood detention basin is divided into two units by the newly built railways and the overcurrent capacity of the railway bridges and culverts will be calculated by the formula of Broad - crested weir. According to the relationship among the water level, the area and the storage capacity of Xiaotanpo flood detention basin, trial method is adopted to calculate the discharge process of the flood detention basin. By calculating, the discharge process is obtained and it shows that the newly built railways have little influence on the flood detention basin. So flood detention basin is able to maximize the capacity to storage and detent the water. The method to calculate the discharge process of Xiaotanpo flood detention basin where railways are built newly is simple and practical and it has certain reference value to analogous flood detention basin.
出处
《山东农业大学学报（自然科学版）》
CSCD
北大核心
2013年第3期385-390,共6页
Journal of Shandong Agricultural University：Natural Science Edition
关键词
蓄滞洪区
防洪评价
洪水演进
流量
Flood detention basin
flood control evaluation
flood evolution
discharge
