Version 2.4.x

• New computation of Zhang's settling velocity
• New 3-D seepage model BASEsub (experimental)
• Lateral 1-D/2-D Model coupling improved: automatic assignment of 1D and 2D
  elements, new options and tutorial. Redesign of block-structure.
• Added 'documentation' option to help menu.
  

• Bugfix: restart (hot-start) for coupled simulations corrected.
• Bugfix: coupling type 'confluence_wse' could not be properly activacted.
• Improved parsing of series file: comments are possible at the end of a line (everything after '#' or '//' is discarded).

• New tag ‘start_time’ in TIME_STEP block introduced (replaces ‘restart_start_time’ in BASEplane).
• STRINGDEF output improved, considering the flow direction. Each STRINGDEF definition now needs the tag ‘upstream_direction’ to be defined!
• New block LATERAL_COUPLING introduced for lateral coupling.

Attention: The changes of the command file structure are not backwards compatible! Input files for v2.3 will not work with v2.4 and vice versa. We recommend all users to
update to version 2.4.

• Smart & Jaeggi sediment transport formula extended to multi grain with hiding & exposure according to Ashida & Michiue
• VTK visualization (BASEviz) now takes geo-referencing into ac.count.
• HecRas conversion script redesigned and enhanced. Script integrated into
  BASEmesh.
  

• Bugfix: zhydrograph now applicable for upper and lower boundary.
• Suspension calculations slightly modified (especially exchange rates sources).

• SMS outputs (*.sol) enhanced with reference time in Julian date format.
• Enhanced output for external water source, separately for each element.
• Added output in VTK-Format (use free visualization program Paraview).
• New boundary type: movement of bed evelation, enforced via file input. Defined in GEOMETRY->BOUNDARY block.
• New output for external (hydraulic) discharge source: "external_source_discharge"
  shows the element-history of the external source.
  

• MDPM scheme works now for pollutant transport only.
• Bugfix: output of tracked variables (‘min’, ‘max’, ‘sum’,…) did crash in some cases.
• Bugfix: polygons in shape output need to be closed.
• Bugfix/feature for cycle-step-algorithm: very small correction time steps are now
  neglected, if they are smaller than the minimum time step size.
• Bugfix: bad memory allocation for restart simulations with suspended-load