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Hydraulic-Hydrological Components Of An Operational System For Dam Management

机译：大坝管理操作系统的液压 - 水力分量

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Two components of an operational system for management of dams were investigated: the first concerns the incoming flood forecast at the reservoir; the second is the downstream flooding risk assessment. As regards the first component, a practical on-line flood forecasting model, based on the Muskingum approach formulated in terms of water levels, was developed. The model incorporates one adaptive parameter depending on the lateral inflow contribution. About the second component, the estimates of the bottom outlet release curves and the downstream channel roughness were considered. For these purposes, a procedure based both on a hydraulic modelling and an experimental flood release was adopted to calibrate the outlet head loss coefficients and the Manning roughness of the downstream channel. The investigation was done for the Casanuova dam in Central Italy. The forecasting model was applied to an equipped Chiascio River branch which is located immediately upstream of the dam and which is crucial to estimate the flood incoming to the reservoir. To test the model selected flood events were used and the forecast stage hydrographs were found similar to those observed at the downstream end of the reach. The absolute percentage error in time to peak and peak water level did not exceed 14% and 12.5%, respectively. The outlet bottom release curves were estimated through a hydraulic model and using the velocity data collected at a gauged section below the dam in the period 1996-2000. They were verified through an experimental flood release carried out in October 2002, during which velocity measurements were made in three different downstream equipped river sections, while the water level was monitored by observers in a large number of river sites where a staff gauge was earlier installed. The discharges given by the release curves were found not different from the observed ones. Finally, the value of the Manning roughness coefficient along the downstream channel was estimated by matching the water levels simulated by the propagation of the experimental release and those locally recorded by the observers.
机译：调查了管理水坝管理操作系统的两个组成部分：首先涉及水库的进货洪水预报;第二是下游洪水风险评估。关于第一组成部分，开发了一种基于在水平方面制定的麝香雨处的实用在线洪水预测模型。根据横向流入贡献，该模型包含一个自适应参数。关于第二组分，考虑了底部出口释放曲线和下游频道粗糙度的估计。为了这些目的，采用了一种基于液压建模和实验洪水释放的过程来校准出口头部损耗系数和下游通道的曼宁粗糙度。该调查是在意大利中部的Casanuova大坝完成的。预测模型适用于配备的ChiaScio河枝，位于大坝的上游，这对估计进入水库的洪水至关重要。为了测试模型，使用了所选的洪水事件，并发现预测阶段的水文照片类似于在触及的下游结束时观察到的阶段的水平。峰值和峰值水位的绝对百分比误差分别不超过14％和12.5％。通过液压模型估计出口底部释放曲线，并在1996 - 2000年期间使用在大坝下方的测量部分收集的速度数据。他们通过2002年10月进行的实验洪水发布进行了验证，在此期间，在配备三个不同的下游河段中进行了速度测量，而水位由观察员在大量河网站上监测，其中员工仪表早期安装。由释放曲线给出的放电未与观察到的曲线不同。最后，通过匹配通过实验释放的传播和观察者局部记录的那些匹配模拟的水平来估计沿着下游通道的沿着下游通道的沿着下游通道的粗糙度系数的值。

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