Sluice Linear Structures (2D)
Sluice Linear Structure (2D) objects are used to define sluice gate dimensions, coefficients and the location of sluices within 2D Base Linear Structures.
See Sluice Linear Structure (2D) Data Fields for more information on data required to define a 2D sluice.
Sluice Linear Structure (2D) parameters are edited in the Sluice Linear Structure (2D) Grid Window of the Lines Grid or the Sluice Linear Structure (2D) Property Sheet.
2D sluices can be created in the Lines Grid or digitised directly on the GeoPlan Window as line objects, although it is not necessary to digitise the objects as they will assume the length geometry of the referenced 2D base linear structure.
Associating sluices with linear structures
To associate a 2D sluice with a 2D base linear structure, specify the base linear structure in the Base Linear Structure (2D) ID field.
The starting location of the sluice is defined by the sluice Start length field, which is the length along the referenced base linear structure relative to its starting point. The geometry of the base linear structure will be applied to the 2D sluice along the length of the sluice.
If the sluice has already been digitised on the GeoPlan, it will be redrawn overlaying the referenced 2D base linear structure line.
Note that if a 2D sluice is associated with a 2D base linear structure, the polyline representing the sluice geometry cannot be edited in the GeoPlan Window. The horizontal geometry of the sluice is controlled by the geometry of the base linear structure.
The level of the top of the sluice gate will override the Crest level specified for the base linear structure along the length of the sluice gate.
2D sluices are displayed in the 3D Network Window and in the section editor of the 2D base linear structure. These views can be used to check that the location of sluice objects has been defined correctly.
Flow characteristics
Flow through a 2D sluice is calculated on an element face by face basis using the same flow equations described in the Sluice Gates topic for 1D sluices.
The Base Linear Structures (2D) topic contains details of how any blockage, lateral friction coefficient and headloss coefficients are applied by the engine.
Results
Flow crossing the linear structure is monitored and output in the Line Results. The flow direction is determined using the same convention used for river sections, in which the first point on the line structure is assumed to be on the left hand side when facing downstream.
