HSWPE 1

HSWPE 1

The amounts of water flowing from a certain catchment area at the proposed dam site are tabulated as follows. Determine: 

• The minimum capacity of the reservoir if the water is to be used to feed the turbines of the hydropower plant at a uniform rate and no water is to be spilled over.

• The initial storage required to maintain the uniform demand as above.

Month	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Inflow x105m3	2.83	4.25	5.66	18.4	22.64	22.64	19.81	8.49	7.10	7.10	5.65	5.66

ANS:

The computation is done in a tabular form below

This value has been entered in column (3) of the below table.

Month	Inflow (x105m3)	Av. Demand (x105m3)	Deficit (x105m3)	Surplus (x105m3)
1	2	3	4 = 3 - 2	5 = 2 - 3
January	2.83	10.8533	8.0233
February	4.25	10.8533	6.6033
March	5.66	10.8533	5.1933
April	18.40	10.8533		7.5467
May	22.64	10.8533		11.7867
June	22.64	10.8533		11.7867
July	19.81	10.8533		8.9567
August	8.49	10.8533	2.3633
September	7.10	10.8533	3.7533
October	7.10	10.8533	3.7533
November	5.66	10.8533	5.1933
December	5.66	10.8533	5.1933
Sum	130.24x105	130.24x105		40.0766x105

Since no water is to be spilled, the minimum capacity will be equal to the sum of the surplus water.

For More Problems in Hydraulic Structure and Water Power Engineering