The greater part of Manyame catchment lies in the central part of Zimbabwe which has relatively medium to high temperatures. The temperatures range from 240C to around 32 0C and these temperatures increase in the northerly direction. Rainfall in this region is ranges from 750-900 mm/annum. Areas in the Zambezi valley have maximum temperatures of above 32 0C and rainfall ranging from 450-600 mm/annum. The catchment is thus characterized by four natural farming regions shown on figure 2.2.
Natural Region II (a)
This is a sub-region of Natural region II and is characterised by intensive farming system. Annual rainfall is confined to summer and is moderately high (750-900 mm/annum). This region covers from the Zambezi escarpment to Mvurwi. Dry spells during summer are limited.
Natural Region II (b)
This is a sub-region of natural region two and is subject either to more severe dry spells during the rainy season or to the occurrence of relatively short rainy seasons.
Natural Region III
Natural region III occurs in areas around the Zambezi escarpment. Rainfall in this region is moderate averaging 650-800 mm/annum. The region is also subject to mid-season dry spells.
This stretches from Muzarabani up to the Zambezi river. The region receives fairly low rainfall between 450-650 mm/annum and is subject to mid-season dry spells.