Parameter/LGA Ogbomoso North Ogbomoso South Oriire Ogo Oluwa Suurulere
Population (NPC, 1991) 101,800 64,234 93,438 36,255 67,709
Temperature (°C) 26.21 28.91 25.66 25.76 25.56
%Organic Content 40.08 51.66 78.24 85.69 86.25
Pan Evaporation (mm) 1450.26 1450.26 1450.26 1450.26 1450.26
Total Precipitation (mm) 1296.65 1296.65 1296.65 1296.65 1296.65
%Moisture Content 43.2 41.5 41.3 40.6 41.6
Runoff Coefficient 0.80 0.70 0.30 0.25 0.20
Surface Area of wastes (m2) 300.41 468.81 154.62 136.72 143.8
Half life, t1/2 (yr) 1.5 1.5 1.5 1.5 1.5
Decay constant, k1 (per yr) 6.14 6.14 6.14 6.14 6.14
Decay constant, k2 (per yr) 1.083 1.083 1.083 1.083 1.083
Source: Ojoawo (2009); IITA (2001); NPC (2006)
Table 2: Validation data for leachate generation in the study area.