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𝜕 𝐶 𝜕 𝑡 = 𝜕 𝜕 𝑧 [ 𝜐 𝑡 𝜎 𝑡 𝜕 𝐶 𝜕 𝑧 ]+ 𝜕 (𝑤 𝑠 𝐶 ̅) 𝜕 𝑧 (16) Fig. 4: Variation of Sediment Concentration rate and Discharge,(Exner) 𝜕 𝐶 𝜕 𝑡 =700( 𝜕 𝑄 𝜕 𝑥 𝑑 𝑥 𝑑 𝑡 ) −0.9 (17) Since the Exner Equation, Garcia ed.(2007) under estimates sedimentation by 6.19% than observed therefore following best fit equation is proposed. 𝜕 𝑐 𝜕 𝑡 =−5+1.35{( 𝜕 𝑄 𝜕 𝑥 𝑑 𝑥 𝑑 𝑡 ) 0.96 +( 𝜕 𝑄 𝜕 𝑥 𝑑 𝑥 𝑑 𝑡 ) −0.5 −( 𝜕 𝑄 𝜕 𝑥 𝑑 𝑥 𝑑 𝑡 ) −0.25 } (18) This equation precisely predict sedimentation well within 1.7% bandwidth. 0.0 20.0 40.0 60.0 80.0 100.0 120.0 0 200 400 600 800 1000 1200 1400 1600 Discharge m3/s Exner Equation 429