Second generation windmill at Mziza Demo Garden. We installed the windmill last week, letting it run over the weekend to check for any kinks. We hooked on the pumping rod today and a makeshift pump to see if we could get water into the tank. We did get water all the way to the tank, 3m above and 20m laterally from the water source.
With successful tests under our belts, we have stepped up our work on the windmill irrigation scheme at Mziza. We have come up with a reservoir system that will act as a buffer between the pumping and delivery structures.
Expected benefits are:
Downsides to this system are: the capital cost of the reservoir (i.e. cement ain't cheap); evaporation will be greater in the reservoir than in the well; standing water attracts mosquitoes (and watering at dusk may put farmers at risk of malaria). There is not much that can be done to reduce capital costs because structural integrity should not be compromised. A crack in the floor of a house does not affect the utility of the house; whereas a crack in the reservoir floor is catastrophic. Every insurance must be made that the concrete will not crack. As for evaporation and mosquitoes, a simple covering over the reservoir will reduce these problems significantly.