Given the management goal of minimizing the total losses that occur within the existing construction and design of a water economy system, particular problem of water economy development is stated and solved numerically. 

The paper is a continuation of a study in complex water economy planning (RR-75-27). As before, it is assumed that the planning process is consistent with the following procedures: formulation of all development alternatives considered, calculation of all alternative development programs, and water economy damage estimation for each alternative development program. 

The problem of total loss minimization is a particular case of a general problem statement. It allows one to reduce the latter two planning procedures to a single one and solve it effectively. With this approach it is possible to simultaneously obtain solutions to both short-term control and long-term development strategy for a given water economy system.