This module works with the complete de Saint Venant Equations, including transient flow phenomena and backwater profiles. It models any cross section (open and closed), including asymmetrical profiles, and y-z profiles. It even allows you to define different subsections within a cross section, using alternative resistance formulations and/or coefficients in each subsection. The hydrodynamic 1D/2D simulation engine has an automatic drying and flooding procedure that is 100% mass conservative. The engine can deal with steep canals with supercritical flow and moving hydraulic jumps are simulated as easily as canals with a mild slope and subcritical flow. Complex networks of any size with internal loops and branches are easily handled without any problems. You can specify nearly any type of hydraulic structure (pumps, weirs, gates, culverts, sluices and bridges of virtually any shape and dimension). It may also take into account deposited soil layers partially blocking culverts and bridges. Various options for automatic control of the structures are available as standard, including time control, hydraulic control and PID control with both fixed and variable set-points.

Sediment transport capacity can be computed and visualised on the network. The effects of wind on water levels can be modelled, by specifying the wind force and direction as constants or time series. All possible boundary conditions and initial conditions can be applied. Lateral in and outflows can be specified as constants, time-based, formula-based or read automatically from the SOBEK RR module. Lateral flows from other modules can easily be coupled. The SOBEK 1DFLOW module interfaces completely with all SOBEK modules to provide an integrated model of the water system.

SOBEK 2 - Hong Kong

SOBEK 2 – Hong Kong

Note that the D-Flow Flexible Mesh module (D-Flow FM) will be the successor of SOBEK 1DFLOW (Rural) in the new Delft3D Flexible Mesh Suite (Delft3D FM).