In: Civil Engineering
An area of 200 ha will be used to grow Alfafa (47 ha), Corn (70 ha) and Tomato (83 ha). The latitude of the area is 380 N. If the monthly temperatures for July, August and September are 21, 20, and 190 C, respectively, calculate the total consumptive use by Blaney-Criddle.
Blaney - Coiddle method :- 1) July Temperature mean = 210c lattitude 38 N to get mean daily percentage (p) Refer table of Annual ay time hours 35° 380 0.32 ? consumptive use (E01) = plo.46T+8) 40° 0.33 0.32610.46421+8) ro 0.01 IX 2° 0.33-2 5.75 mm/day 0.01x2 0.33-2= I X=0.326 2) August :- Team 20°c lattitude = 38°N from table - 0.30 ? 38 40° 0.31 .. consumptive use E01 - P(0.467 6 Treant + 8) 0.31-X = 0.01xQ x=0.306 0.30610.46X20+8) 5.26 mm/day
3) Septembes:- Tmean lattitude - 380N - 1900 35 - 0.28 40° 0.28 Consumptice use EOT - 0.281046X1978) 24.68 mm/day .: 38 -0.28 Total consumptive use - 5.75 +5.26 +4.68 : 15.69 mm/day