Which one of the following is a simple and straight forward analytical procedure for computing reservoir capacity and is used as an excellent alternative to mass curve method of determining reservoir capacity?
- ASequent peak algorithmCorrect
- BInflow method
- CCumulative inflow
- DFirst peak
Solution
Concept
Sequent peak algorithm
Formula
Kt = max(0, Kt−1 + Dt − Qt); Capacity = max Kt
Step-by-step solution
1. The sequent peak algorithm computes the cumulative deficit (storage needed) period by period. 2. The largest deficit is the required capacity.
Explanation
It is the analytical counterpart of the mass curve (Rippl) method and is easy to program.
Why the other options are wrong
Cumulative inflow is the quantity plotted in the mass curve. "Inflow method" and "first peak" are not named procedures.
Shortcut
Sequent peak = numerical mass curve.
Common mistake
Choosing cumulative inflow.
Correct answer: A) Sequent peak algorithm