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Pumps - Computation of water requirement - Problem 1
Unit 12 - Management of ponds
Pumps
Computation of water requirement
Problem
1. Determine the number and capacities of freshwater and sea water pumps required for a shrimp farm having 10 ponds, each with water spread area of 1 ha. Assume the following data.
Average depth of water in the ponds = 1 m
Anticipated maximum water exchange rate in a day - 50%
Sea water salinity - 35 ppt
Required salinity in the pond water - 15 ppt
Average depth of water in the ponds = 1 m
Anticipated maximum water exchange rate in a day - 50%
Sea water salinity - 35 ppt
Required salinity in the pond water - 15 ppt
Available period for pumping freshwater and seawater =12 hrs/day
Also, assume average water area of each pond to be nearly equal to its water spread area i.e., 1 ha. Values of precipitation and losses due to seepage and evaporation are negligible.
Volume of water in each pond =Average area of pond x Average depth of water in the pond = 10,000x1 = 10,000 m3
Total volume of water (V) = 10 x10,000 = 1,00,000m3 (10 No. of ponds)
Last modified: Thursday, 28 April 2011, 5:16 AM