Table 14.1: Calculation of the storage volume for collecting rainwater for irrigation in Bangalore (India). Precipitation Pre (Muller 1996); Monthly storable precipitation STPm with (14.5) and EVpond = 0; ET0 see Fig. 13.1;
CWRm = ET0 X kc(1 + h) x AqMg X dm
For tomato, mean kC = 1.1; (1 + (;) = 1.05; ACr/AG = 0.9
kc(1 + (i) x Acr/AG = 1.04;
CWRm = 1.04 x ET0 x dm From Table 14.1 can be seen:
STPy = Epos STPm = 164.9 l/m2 year Defy = Eneg STPm = 371.2 l/m2 year
Table 14.1 Data for the calculation of the storage volume in Bangalore (India)
Case 2(a): Storage volume per m2 greenhouse area VST = STPy = 165(l/m2) The storage is empty from February until July.
Looking at the accumulated sum of STPm, starting in August, the crop water requirement can be covered for 6 months from August to January by rainwater with a storage volume of 0.165 m3 per m2 greenhouse area.