Determine the gross water supply reservoir volume for the following information:
City population: 200,000
Water consumption rate: 568 Lpcd
Catchment area: 103 Km2
Rainfall rate: 110cm/yr
Annual soil evaporation: 50cm
Minimum net reservoir volume: 50% of annual yield or half of a year water supply whichever is greater.
If during the droughts 25% of water required is supplied from a deep well field, how many deep wells with 30 liter/second discharge are required if each well supplies water for 12 hours per day.