Statement I): The fundamental storage equation through a river reach considers that the total inflow is balanced by total outflow plus the change in storage in the reach over the routing period as has been considered.Statement II): To be adaptable for actual computations, the storage equation is recast in the form \(\frac{1}{2}\left( {{I_1} + {I_2}} \right)t + \left( {{S_1} = \frac{1}{2}{D_1}\;t} \right) = \left( {{S_2} + \frac{1}{2}{D_2}\;t} \right),\)Where suffixes 1 and 2 denote values at start and end respectively, of the routing interval t, the I’s and D’s denote, respectively, the inflow and outflow at the respective points of time and the S’s denote the storage in the reach at the respective point of time.

• A. Both Statement I) and Statement II) are individually true and Statement II) is the correct explanation of Statement I)
• B. Both Statement I) and Statement II) are individually true but Statement II) is not the correct explanation of Statement I)
• C. Statement I) is true but Statement II) is false
• D. Statement I) is false but Statement II) is true