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 Nam is a lumped, conceptual rainfall-runoff model simulating overland flow, interflow and baseflow as a function of the water storage in each of four mutually interrelated storages representing the storage capacity of the catchment..
The Hydrologic Modeling System (HEC-HMS) is designed to simulate the precipitation-runoff processes of dendritic watershed systems.
The program is a generalized modeling system capable of representing many different watersheds. A model of the watershed is constructed by separating the hydrologic cycle into manageable pieces and constructing boundaries around the watershed of interest.
The watershed is rapresented with a seris of storage layers:
Canopy-interception storage
Surface-interception storage
Soil-profile storage
Ground storage
TOPKAPI is a physically-based and fully-distributed hydrologic model with a simple and parsimonious parameterisation. The model is structured around following modules: interception, snowmelt, evapotranspiration, infiltration, percolation, sub-surface flow, surface flow, groundwater flow and channel flow.
MIKE11 consist of a hydrodynamic core module and a number of add-on modules, each simulating certain phenomena in a river system. The complete non-linear equations of open channel flow (Saint-Venant) is solved numerically between all grid points at specified - and adaptive - time intervals for given boundary conditions (Preissmann scheme) . The software HEC-RAS “River Analysis System”, developed by U.S. Army Corps of Engineers, allows to perform one-dimensional steady and unsteady flow hydraulics. The procedura for solving the one-dimensional unsteady flow equations is the four point implicit scheme also known as the box scheme.
l’andamento nel tempo della percentuale di acqua dolce e acqua salata in una sezione.