Dam-induced changes in flood hydrology and flood frequency of tropical river: a study in Damodar River of West Bengal, India
Dam-induced changes in flood hydrology and flood frequency of tropical river: a study in Damodar River of West Bengal, India
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DOI：
10.1007/s12517-015-2046-6
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发表时间：
2016-02-01
影响因子：
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通讯作者：
Guchhait, Sanat Kumar
中科院分区：
文献类型：
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作者：
Ghosh, Sandipan;Guchhait, Sanat Kumar
西孟加拉邦的达莫达尔河因自1665年以来记录在案的季风洪水造成的大规模不可预测的破坏而被普遍称为“孟加拉之痛”。1948年印度达莫达尔河谷公司(DVC)成立后，修建了蒂莱亚、特努加特、科纳尔、迈桑和潘切特大坝(恰尔肯德邦)和杜尔格普尔拦河坝(西孟加拉邦)，以将洪水流量调节到一定的限度。但是，由于洪水在坝前阶段是不可预测的，即使是现在，下达莫达尔盆地也不安全，不受季风洪水的影响。为了评估洪水风险和洪水排放的性质，我们在这里主要使用冈贝尔分布和对数皮尔逊III型分布来对达莫达河的年最大流量进行极值分布(EVD)拟合。坝前(1934-1957年)和坝后(1958-2007年)洪水频率分析显著预测了具有一定重现期的隆迪亚达莫达尔的最大可能洪水流量，并为达莫达尔流域未来的洪水风险提供了一个思路。
The Damodar River of West Bengal is popularized as 'Sorrow of Bengal' due to massive unpredictable destruction in the monsoonal floods, recorded since 1665. After establishment of Damodar Valley Corporation (DVC) of India in 1948, Tilaiya, Tenughat, Konar, Maithon and Panchet dams (Jharkhand) and Durgapur barrage (West Bengal) are built to regulate flood flow to a certain limit. But, as the floods were unpredictable in pre-dam phase, even now, lower Damodar Basin is not secure from the monsoonal floods. To assess the flood risk and nature of flood discharge, we have focused here to fit extreme value distribution (EVD) to the annual peak flow of the Damodar River using mainly Gumbel and log Pearson type III distributions. Pre-dam (1934-1957) and post-dam (1958-2007) flood frequency analysis has significantly projected maximum probable flood discharge of Damodar at Rhondia with a certain return period of occurrence, and it provides an idea about future flood risk in lower Damodar Basin.