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A total load approach to predict bed load transport of Indian alluvial river

Abstract Bed load data are scarcely measured continuously for Indian rivers. In the absence of measured bed load data, the present study tests bed load computed using selected bed load sediment transport functions. The computed bed load is compared with widely accepted thumb rule estimation of the bed load, i.e. the Maddock’s approach. To check the suitability of these bed load equations for Indian river (Purna River), the computed bed load (BLc) has been added to observed suspended load and total load of the Purna River is derived. On other hand, the total load for the Purna River is worked out using Yang’s (1973) unit stream power approach for total load prediction. The total load computed (TLc) for the Purna river is then compared with the total load predicted (TLp) using Yang’s approach. It is observed that best prediction in total load transport is obtained when bed load is computed as 10% of observed suspended load. A similar performance is obtained when bed load is computed using Recking’s bed load function.