溢洪堰春修指挥部第一期工程中领导灾民和新工的经验

溢洪堰春修指挥部所辖工段上的民工大多是离乡的灾民,身体衰弱,工具不多,没有推土经验,加之堤河积水,地湿路黏,给工作带来很多困难。

长龙水库溢洪道的加固设计

本文根据长龙水库溢洪道水工模型试验基础上提出了加固设计方案,既解决了溢洪道存在的问题,又节约了资金,取得了良好的经济效益.

小浪底枢纽运用后垦利南展宽区工程防凌作用分析

为解决东营麻湾至利津王庄河段长达30km的窄河段防凌问题,保障沿黄人民生命财产安全以及油田开发和工农业生产发展,结合防洪、放淤和灌溉,经国家计委和原水电部批准建设了南展宽区工程。小浪底水库运用后,黄河下游防凌问题发生了新的变化。本文对小浪底水库建成后南展宽区工程防凌运用问题进行了研究。

大中型放养场蓄水拦鱼设备初探

茂兴湖渔场临江拥有大半型放养场3处，面积为9儿50亩(白银中华25950亩，大庙10000亩，靠山湖55200亩)。每年汛期为保证养鱼用水，都大量蓄水。1986年以前都采用传统的溢洪堰箔拦鱼蓄水，存在许多弊端，为此1987年我场对拦鱼进水设备上进行了改进，在靠山湖放养场采用溢洪堰挂呆河网拦鱼蓄水试验，取得了显著效果。1988年，白银中华放养场和大庙放养场都使用这一蓄水方法。

Variation of Discharge Coefficient of Spillway and Broad Crested Weir Due to the Effectiveness of the Longitudinal Slope in a Non-horizontal Channel

In this work, experiment efforts were devoted to study the effect of the longitudinal slope of channel on the discharge coefficient for ogee spillway and broad crested weir. A comprehensive laboratory study including 17 tests was conducted to estimate the variation of the discharge coefficient due to variation of the longitudinal slope. It was shown that the discharge coefficient is significantly increasing with the increase of the slope by more than 90% or 75% and 80% or 70% for weir and spillway in case of excluding or including the approach velocity head, respectively. Also, CFD （computational fluid dynamics） with a help of Comsol-multyphsics program was used to simulate the problem. The program explained that the linear distribution of the hydraulic pressure changes to a non-linear distribution as the longitudinal slope is considered. Consequently, the values of the discharge coefficient are also affected.