Software engineering is an important discipline of knowledge that allows abstracting an environmental system, modeling a watershed and providing conceptual and interaction elements of players in the configuration of modeling approaches for decision-making on water resources environmental planning; therefore, the purpose of this article is to have an environment envelope through a set of environmental aspects that can be represented by a meta-model that leads to a cognitive construct of the problem and defines the methodological model for proper environmental planning of watersheds, in decision-making at strategic and operational levels.