Flood Hydrology and Risk Assessment


Book Description

Damodar River of India is popularized as 'Sorrow of Bengal' due to massive unpredictable destruction in the monsoonal floods, recorded since 1665.Taking three prime objectives of development: (1) flood control, (2) extensive irrigation and (3) power generation, Damodar Valley Corporation (DVC) was established in 1948 as India's first multipurpose river valley project on the Damodar River Basin. Four large dams, Durgapur barrage and Tenughat reservoir are built to tamp the flood prone Damodar River using the water resource in an integrated method. Carrying sixty years of legacy, the existing drainage and flood control system of DVC has aggravated a number of hydrogeomorphic problems especially in the lower segment of Damodar, viz., siltation of river bed and reservoirs, uncontrolled monsoonal stream flow, declining carrying capacity of lower course, drainage congestion, low-high magnitude annual floods, decay of palaeochannels etc. Highlighting the existing problems, this research work mainly tries to analyze the pre-dam and post-dam flood hydrology and risk assessment of Damodar River Basin which can be applied in the flood management strategies of West Bengal.




Damodar Flood Control Project


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Flood Control Series


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The Lower Damodar River, India


Book Description

Interweaving the human aspects of river control with analysis of hydro-physical data, including historical data over the last few centuries, this monograph is a comprehensive evaluation of the Damodar’s lower reaches. While the Damodar River isn’t an exceptional tropical river, nor does it feature classic examples of river control structures, it is unusual and worthy of study due to the fact that nowhere else in the tropical world have riverine sandbars been used as a resource base as well as for permanent settlements. Based on their knowledge of river stages, the inhabitants have fine-tuned their land use to flood events, applying a concept of flood zoning to the riverbed. Every available space has been utilized rationally and judiciously. This rare human-environmental study analyzes the remarkable way in which immigrants unfamiliar with the riverine environment have adapted to the altered hydrologic regime of the river. In doing so they have demonstrated a sophisticated understanding of the flood regime and the vagaries of an unpromising environment in their land use, cropping and settlement patterns. Spurred on by restricted social and economic mobility and sometimes political constraints, these self-settled refugees have learned to adapt to their environment and live with the floods. Bhattacharyya’s text is particularly timely, as anthropogenic processes of this kind have not been adequately studied by geographers.