Integrated Water Resources management Questions

1. A storage reservoir operates according to the semi - rigid policy rules (type 1) with a 3 - hours time step. A policy parameter alpha = 0,2 , the initial flood reserve capacity VR = 1,3 min cu.m, the harmless flow volume qharl = 120.0 cu.m/s, the reservoir inflow Q = 300.0 cu.m/s.

2. Net water demand for an irrigation facility which area amounts F1= 1728 ha is equal pl net = 60mm. Duration time of the irrigation is angle t = 5 days. The amount of water taken from a river in order to implement the irrigation equals pl = 4 cu.m/s.

compute the efficiency of the irrigation system n.

3. Draw a standard policy graph for a storage reservoir with a usable capcity of VU=7mIn cu.m which supplies a user which demand amounts to TP= 4,96 cu.m/s time step duration is angle t = 7 days. on the basis of the developed graph define : reservoir release T, water decifit D suffered by the user, surplus release SR and final reservoir storage VF for a time step in which inflow to the reservoir is Q = 3,31 cu. m/s and inital storage at this time step is VB = 2 Mln. cu.m.

Perform calculations to two decimal places. Mark points D (1,2) , E(5,2) , F(10,2) on the graph and explain the physical interpretation of these points.