The Analysis and Optimization in Micro-hydro-generation is the best way to improve new renewable systems. As is known, the Micro-hydroelectric generation is an alternative in areas that has zero access to electrical energy, or isolated areas. The objective of this paper, is to show how a methodology could improve the behavior in the hydroelectric generation. In this case, is based on design considerations by Bilal Abdullah. This paper is about an specific test bench installed in Chiapas, with flow conditions from 4 to 16 l/min, the flow considerations are presented in a new scheme, that is proposed in a previous work made by us. In this specific case, includes the evaluation of the flow due to a tank that is installed in the evaluation area, and the mathematical models are adapted to this case.