As tomorrow we’ll have an exam in Water Resource Management class, i’d like to write about a simple reservoir simulation.
Basically, in designing a reservoir operating rule, we can do two types of steps: (1) Simulation, and (2) Optimization. Simulation is a good choice to start. But if we want some more sophisticated step, optimization will do.
Generally speaking, in simulating a reservoir operation rule, there are so many thing we can do. For example, we can simply simulate the Standard Operating Rule which based on reservoir water balance. The equation for water balance, as we know it, is:
dS/dt = I – O, where dS/dt is the change in reservoir storage due to time, or S(t+1) – St, and I is the inflow, while O is the outflow which usually consists of the actual release, evaporation, etc.
aah, let’s get this to the point. The point is, define which will be the inflow and what are the outflow consists of.
umm… Let’s have a look at a fictitious reservoir with its inflow and outflow data. The question in this case is.. “when will be the appropriate time to start the reservoir release?”
Hint : a reservoir operation/simulation will be considered as good if the storage at the beginning of the period is not much different (same) with its storage at the end of period. So we need to see the graph.
we’ll expect such graph:
To make it easier, i put some tools in the excel file. you can download this if you like : Resservoir Simulation 01
this is the beginning of figuring a reservoir operation. We still have tons of work to obtain a good reservoir operation rule.
*to be continued… or at least, i plan to continue. ^^V