The WA+ resource base sheet indicators include a storage change fraction, an exploitable water fraction, an available water fraction, a basin closure fraction, and a reserved flow fraction. The exploitable water fraction (EWF) represents the portion of exploitable water in the net inflow. The storage change fraction (SCF) defines the portion of storage change in exploitable water. EWF is closely related to the natural run-off coefficient in a basin when no infrastructure is present, and when storage changes can be neglected. The Indus basin showed a EWF of 0.34 and its SCF was −0.23. The available water fraction (AWF) indicates the proportion of the exploitable water that is actually available for withdrawals after corrections for reserved flows. The calculated AWF of the Indus basin was 0.93, which indicates that the basin’s water commitments are not a constraining factor for allocations. Indeed, most of the available water is utilized.