HEC-ResSim is a tool that supports reservoir simulation models, aiding decision-making for improved reservoir operations. The nature of HEC-ResSim, its flexible framework for describing reservoir operations, and its new and powerful features make it applicable for modeling almost any multi-purpose storage system. The approach used by HEC-ResSim is based on rules to replicate the operational decision-making followed by reservoir operators. For water release processes from the reservoir, HEC-ResSim considers variables such as the time of year, hydrological conditions, water temperature, and simultaneous operations with other reservoirs within the system.

This tutorial covers an applied case of reservoir modeling at the discharge point of an andean basin. The example covers the steps to set up the watershed, define the reservoir network, simulate the hydrological alternative and explore output hydrographs and tables.