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Flow Duration Curve for Downstream of Sungai Perak Using Minimum and Maximum Flow

机译：使用最小和最大流量的Sungai PARAK下游的流量持续时间曲线

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The recent flood event that occurred in 2014 had caused disaster in Perak and Sungai Perak is the main river of Perak which is a major natural drainage system within the state. The aim of this paper is to determine the flow duration curve for downstream of Sungai Perak using minimum and maximum flow. The flow-duration curve describes the variability of the streamflow and is useful for determining dependable flow which information is required for planning of water resources and hydropower projects, designing a drainage system and flood control studies. In this study, the development of FDC is solely based on the available discharge data of the selected streamflow stations. The plot between percentage times of discharge against discharge was calculated using the probability equation to determine whether the percentage time of discharge is equal or exceeded. From the calculation, the results show that the significant differences in the discharge as the percentage of the time change. Two crucial stations were discussed which are Sungai Perak at Jambatan Iskandar station located at the main river and Sungai Pelus at Kampung Lintang station located at Sungai Perak main tributaries. The results shows that, half the time the flow in the river is at least200 m~3/s, and 90% of the time not less than 100 m~3/s while the daily average flow at Kg Lintang was at least 20 m~3/s that is 50% of the time, and 10 m~3/s that is 90% of the time. It proves that the hydropower scheme gives a positive impact towards the downstream of the Chenderoh dam especially during the low flow where the flow is regulated by the discharge from the dam.
机译：最近发生的洪水事件发生在2014年造成霹雳州灾难，Sungai Perak是霹雳州的主要河流，这是该州内的主要自然排水系统。本文的目的是使用最小和最大流量来确定Sungai Peanak下游的流量持续时间曲线。流量持续时间曲线描述了流流的可变性，并且可用于确定水资源和水电项目规划所需的可靠流，设计排水系统和防洪研究。在这项研究中，FDC的开发仅基于所选流流程站的可用放电数据。利用概率方程计算抵抗放电百分比之间的曲线，以确定排出百分比是否等于或超过。从计算中，结果表明，放电的显着差异作为时间变化的百分比。讨论了两个重要的站点，位于位于坎普兰塘站的主要河流和Sungai Pelus，位于位于Sungai Perak主要支流的主河和Sungai Pelus。结果表明，河流流动的一半是至少200 m〜3 / s，90％的时间不小于100 m〜3 / s，而千克林塘的日平均流量至少为20米〜3 / s是50％的时间，10米〜3 / s，是90％的时间。事实证明，水电方案对Chendhoh Dam的下游产生了积极的影响，特别是在低流量期间，流量通过从大坝排出的流量调节。

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