Reservoir Modelling in Bearma Basin by Using Mike Basin

Abstract

MIKE BASIN is an integrate water resource management and planning computer model that integrates GIS with water resource modelling (DHI, 2006). The Bundelkhand region in Central India has been in the grip of severe drought in the last decade mainly due to poor, limited and untimely rainfall and its high variability coupled with improper water resources development and management. Bearma river is one of the important tributary of river Ken lies completely in Madhya Pradesh. In Bearma basin, Irrigation planning and management has been carried out for drought year (2002). Study has been conducted and analysed under two different Scenarios, (1) : without provision of reservoir in the Bearma basin (2) : with provision of reservoir in the Bearma basinIn the first scenario, all demands of water users on 10 daily basis from july 1 to November 10 are fulfilled through river whereas in second scenario all demands of users on 10 daily basis are fulfilled by river as well as from the reservoir RS directly connected through user WU7. In the present study, the irrigation management in the command of Bearma basin has been carried out from reservoir releases. In this study “rule curve reservoir” method was used for addition of reservoir in Bearma basin. Irrigation demands for soybean crop during the monsoon period (June to October) on a 10- daily basis for all users namely WU1, WU2, WU3, WU4, WU5, WU6 and WU7 existing in sub-basins namely SW1, SW2, SW3, SW4, SW5, SW6 and SW7 have been computed by using CROPWAT. It can be seen that in scenario (1) there is no provision of reservoir in the basin, user WU7 used maximum water as 125.55 MCM and deficit is also maximum in this sub-basin with 88.48 MCM. In scenario (2) with provision of reservoir in basin, it can be seen that that reservoir RS has used maximum water of 218.05 MCM and deficit of 42.41 MCM also occurs. The performance is more noticeable that demand deficits have greatly reduced from 88.48 MCM to 42.41 MCM for WU7 by construction of reservoir. It can be appreciated that all the users that have not been connected to the reservoir are facing deficits of varying magnitudes under drought situation. Therefore, it will be prudent to explore additional sites for reservoirs on different locations so that the deficits can be minimised to the minimum extent possible.