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Water and health; Control of schistosomiasis; Ecology of snail vectors of schistosomiasis; Engineering measures for control of schistosomiasis: Chemical control of snail vectors.
Water supply: rainwater harvesting, runoff agriculture, irrigation with saline water, reuse of water, wells, other sources of water; Water conservation: Reducing evaporation from water surfaces, reducing seepage losses, reducing evaporation from soil surfaces, trickle irrigation, other innovative irrigation methods, reducing cropland percolation losses, reducing transpiration, selecting and managing crops to use water more efficiently, controlled-environment agriculture; other promising water-conservation technoiques.