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Channel Form and Process of the Burhi Dihing River, India
Jogendra N Sarma and Sudhir Basumallick
Geografiska Annaler. Series A, Physical Geography
Vol. 68, No. 4 (1986), pp. 373-381
Stable URL: http://www.jstor.org/stable/521528
Page Count: 9
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As an integral part of the drainage basin study of the Burhi Dihing river, an attempt has been made here to analyse the form and process of the river channel, with emphasis on hydraulic geometry and form-process response. The longitudinal profile of the river is concave upward with three knick points representing four segments of different erosional phases. The meander radius and the meander wavelength show a more linear relationship. The cross section of the river varies from trapezoidal to asymmetric in shape; the width decreases but depth and velocity increase towards downstream. The variation of hydraulic parameters during passage of a flood reveals that stage, mean velocity and suspended sediment content have higher values in the rising of discharge as compared to the recession period. The scouring of bed is associated with flood and silting with recession. Maximum fluctuation of the bed profile occurs during the flood season, during low flow period the bed profile remains almost constant. The change of bed profile in consecutive years is found to depend on the magnitude of the peak flow and the volume of water discharge.
Geografiska Annaler. Series A, Physical Geography © 1986 Swedish Society for Anthropology and Geography