The Muskingum model of routing a flood through a stream reach is expressed as $O_{2}=K_{0} I_{2}+K_{1} I_{1}+K_{2} O_{1},$ where $K_{0}, K_{1}$ and $K_{2}$ are the routing coefficients for the concerned reach, $I_{1}$ and $I_{2}$ are the inflows to the reach, and $O_{1}$ and $O_{2}$ are the outflows from the reach corresponding to time steps 1 and 2 respectively. The sum of $K_{0}, K_{1}$ and $K_{2}$ of the model is

(A) -1

(B) -0.5

(C) 0.5

(D) 1

The Muskingum model of routing a flood through a stream reach is expressed as $O_{2}=K_{0} I_{2}+K_{1} I_{1}+K_{2} O_{1},$ where $K_{0}, K_{1}$ and $K_{2}$ are the routing coefficients for the concerned reach, $I_{1}$ and $I_{2}$ are the inflows to the reach, and $O_{1}$ and $O_{2}$ are the outflows from the reach corresponding to time steps 1 and 2 respectively. The sum of $K_{0}, K_{1}$ and $K_{2}$ of the model is

(A) -1

(B) -0.5

(C) 0.5

(D) 1

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