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Dynamic rule curves for multipurpose reservoir operation for different floods
Journal of Water & Climate Change ( IF 2.8 ) Pub Date : 2020-12-01 , DOI: 10.2166/wcc.2019.046
C. Chaleeraktrakoon 1 , A. Worawiwat 1
Affiliation  

Dynamic flood control rule curves (DFCRCs) that balance the use of conservation space between flood control and conservation purposes are usually necessary for the operation of a multipurpose reservoir. This paper therefore proposes a procedure to apply the DFCRCs of an historically-based actual flood for reservoir operation versus different floods whose hydrograph shapes vary widely. The proposal uses related-size characteristics (e.g. net retention of the DFCRCs and peak discharge of associated outflows) in a stepwise manner from those of the smallest return period to those of the largest one. Illustrative applications of the procedure to the operation of the multipurpose Ubol Ratana Dam (The Nam Pong Basin, Thailand) have indicated that it enables the DFCRCs to ensure the reservoir's operation against various floods. Its operational results for the large and moderate floods in 1990 and 1995 are comparable to those of historically based floods. In addition, impact assessment of climate change on the operational performance has shown that the system could not protect the areas upstream and downstream of the dam from the HadCM3A2 and HadCM3B2 floods at the 80th and 95th percentile levels during the future 2050s period.



中文翻译:

不同洪水的多功能水库调度动态规律曲线

在多功能水库的运行中,通常需要在防洪和保护目的之间平衡保护空间使用的动态防洪规则曲线(DFCRC)。因此,本文提出了一种程序,可将基于历史的实际洪水的DFCRC应用于水库运营,而不是水文形态变化很大的不同洪水。该提案采用相关的规模特征(例如,DFCRC的净保留额和相关流出的峰值流量),从最小的回报期到最大的回报期逐步使用。该程序在多用途Ubol Ratana大坝(泰国南蓬盆地)的运行中的说明性应用表明,它使DFCRC能够确保水库的运行免受各种洪水的影响。在1990年和1995年的大洪水和中等洪水中,其运行结果与历史性洪水可比。此外,气候变化对运营绩效的影响评估表明,该系统无法保护水坝上游和下游地区免受未来2050年代80和95%百位水平的HadCM3A2和HadCM3B2洪水的影响。

更新日期:2020-12-16
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