River basin development is seen as a very effective means of improving agricultural productivity. In the Chad basin area of the Sahelian Zone, the water resources have been harnessed to ensure viable agricultural programs for Nigeria. However, the resultant successes have met by many problems that range from physical to socio-economic and of which water losses have been the most threatening. The study has called for the use of Hexadeconal film on the water surface of the Chad as a means of reducing evaporation.