Abstract
The surface water storage structure, small in capacity known as tank in South Asian Countries, is one of the main hydrologic units. It stores water due to rainfall on its catchment and is released for fulfilling various needs. The estimation of tank catchment yield will be more essential for southern parts of Indian peninsula since several tanks exist over wide area. In this study, estimation of tank catchment yield is carried by time–area method of flow routing using geographical information system (GIS). Time–area method utilizes a convolution of the effective rainfall hyetograph with the service of time–area diagram. Duraiswamipuram tank at Sindapalli Uppodai sub basin of Vaippar Basin, situated in Virudhunagar District of Tamil Nadu, India is selected for the study. It receives water from free catchment alone. The catchment area, water spread area and drainage pattern of the Duraiswamipuram tank are calculated with the capabilities of GIS. Capacity survey of the tank is conducted using Global Positioning System (GPS) and utilized to develop stage against capacity curve. The tank water level at the end of each storm event is observed and converted into volume of water reaching the tank with the help of stage-capacity curve. The validation of the model is carried out by comparing the estimated storage and the observed storage obtained from the capacity curve and measured water levels in the tank.
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Acknowledgments
This study is a part of the Research Scheme title “Rainfall-Runoff Modelling and Groundwater Dynamics of Irrigation Tank Clustered Catchment in Semi Arid Region” funded by INCID, Ministry of Water Resources, Government of India. The authors express their deep sense of gratitude to the funding authority and CWR for supports.
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Sudharsanan, R., Krishnaveni, M. Tank Yield Estimation using Flow Routing and GIS Techniques. J. Inst. Eng. India Ser. A 93, 209–214 (2012). https://doi.org/10.1007/s40030-013-0025-z
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DOI: https://doi.org/10.1007/s40030-013-0025-z