The Linear Reservoir method conserves mass by routing infiltrated precipitation The Constant Monthly method allows the specification of a constant baseflow for each month of the year. The Recession method gives an exponentially decreasing baseflow from a single event or multiple sequentialĮvents.

All of the previously-mentioned transform methods can be used with basin-averageįive methods are included for representing baseflow contributions to subbasin outflow. An implementation of the kinematic wave method with multiple planes and channels is also included. The Modified Clark method (ModClark) is a linear quasi-distributed unit hydrograph Techniques are also available for use including User-Specified Unit Hydrograph and User-Specified S-Graph. Unit hydrograph methods include the Clark, Snyder, and SCS techniques. Seven methods are included for transforming excess precipitation into surface runoff. A surface component can be added to represent depression A canopy component can be added to represent interception and transpiration. SCS Curve Number, and Gridded Soil Moisture Accounting. Four of the previously-mentioned infiltration methods also have gridded implementations including Gridded Deficit and Constant, Gridded Green and Ampt, Gridded Three options are available for simulating long time frames or multiple flood events including Deficit and Constant, Layered Green and Ampt,Īnd Soil Moisture Accounting. Five options are available for simulating short time frames or discrete flood events including Initial and Constant, SCS Curve Number,Įxponential, Green and Ampt, and Smith Parlange. An assortment of different methodsĪre available to simulate infiltration losses. Computation proceeds from upstream elements in a downstream direction. Include subbasins, reaches, junctions, reservoirs, diversions, sources, and sinks. Hydrologic elements are connected in a dendritic network to simulate runoff processes. The physical representation of a watershed is accomplished with a basin model.

Hec geohms arcgis 10.4