HYDROLOGICAL STUDIES FOR MANIBHADRA DAM PROJECT

Abstract

The Manibhadra dam project has been envised to t arnoss the water resources of Mahana3d i river, in Or issa st atoo, for t.h "° benefit of rower-cenPration, fiocx3 control and uric a ion. r' is there was a proposal to construct a dam at Tikarpara T.:hi.ch invoi a great deal of submergence. To reduce the submr=raence of area, the Msni!hhadra darn project wh Lch is 32 km. d/s of Tthar; 3ra s proposed. Secondly, the disastrous flood of the Miahanar i curing 1?P, has made it imperative to build a floor. moderation resc_rvo r, lo-cated suitably between. the Kirakud and the delta head. Thouch Tikarpara was the earliest proposal fur the purpose, the same h~~ been sups rcec?ed by Manibhadra which seems to be the of"t impm solu-tion for moderation of Mahanadi .flood. Keeping in view of the abc e proposal the fo11.^.wincs have been attempted in the present study, i) i;st tmation of long term annual flow series throuch d.?v1e~ m'--nt of rainfall-runoff relationship, consic'_ rinr (a) The flows at Tikarpara is correct as .~lt:-rnrttive--1 3 rid (h) Compl tef disrec zrdinr, the Tikarr era flaw and de- composing the Virgin catchment h _'tw:,en Hirakud upto Tikarpara into three sub-b3.,ins such is Ong, Tel and remaining catchrn nt, as a_ter- native-2. ii) : stim~ti.on of water availability for 50%, 75;0' and 93% depcnri ; 1 flow at Tikarpara/ifan Lbh rc, keY vonri.ous ai er-n.et fives.