54 On the Supply of Water 



Table No. VI. 



SUPPLY. 



Assumed Eainfall . 



inches. 



See data, Table No. VIII. taken at 36-00 



Dew 0-00 



36-00 

 Evaporation . . . . . . . . . . . . 27*00 



25 per cent, available rain-fall . . . . . . . . 9-00 



6,666 imperial acres, or two-thirds of watershed, 

 allowing 9 inches or 25 per cent, as available 

 rainfall . . 



3,334 imperial acres, or two-thirds of watershed in 

 the immediate vicinity of the Eeservoir, or 

 50 per cent, as available rain fall 



Gallons. 

 •1,356,758,310 



1,357,165,378 



10,000 



252 imperial acres surface level of reservoir, at 40 ft. 

 contour — 



Eainfall .. .. 36-00 inches.! oo-tokqiqo 



Dew .. .. 4-00 = 40-00 J m'^^* 



Available gallons of water per annum . . . . 2,941,881,880 



Table No. VII. 



Cubical Capacity of Eeservoir, in Gallons. 



Cubic Feet. Gallons. 



Wormbete Valley proper . . 207,976,236 



Western Inlet 53,541,047 



North-east Inlet .. .. 5,147,058 



266,664,342, or 1,661,318,850 

 Evaporation. 

 Acreage at forty feet level of ] Mean 218 acres 



surface 252 \ at 



Ditto thirty feet .. •• 184 J 4-166 feet 246,462,969 



1,414,855,881 

 Demand. 



Consumption of 50,000 population, at an average 

 of fifty gallons per "head per diem, for all 

 purposes, for twelve months . . . . 912,500,000 



Showing a balance of above five' hundred mil- 

 lions of gallons, as provision against 

 occasional droughts 502,355,881 



Consumption for an additional sis months . . 456,250,000 



Balance of forty-six million gallons for evapo- 

 ration and contingencies, after supply for 

 eighteen months . . . . . . . . 46,105,880 



