Issues

• BUY: spurious flow at rest across vertical connections with partially saturated convertible cells

  MODFLOW-ORG/modflow6#3153 · Filter by author christianlangevin opened on Nov 12, 2026
  1

• Faster application of the ILU preconditioners

  enhancement
  MODFLOW-ORG/modflow6#3145 · Filter by author jdhughes-dev opened on Nov 12, 2026
  

• ILU0 and MILU0 factorization clears the bad pivot flag, so the diagonal shift retry never runs

  bug
  MODFLOW-ORG/modflow6#3142 · Filter by author jdhughes-dev opened on Nov 12, 2026
  2

  

• IMS inner convergence test uses scaled values with SCALING_METHOD

  bug
  MODFLOW-ORG/modflow6#3141 · Filter by author jdhughes-dev opened on Nov 12, 2026
  1

  

• Unit tests will fail on linux-64 after the next pixi lock update

  MODFLOW-ORG/modflow6#3131 · Filter by author jdhughes-dev opened on Nov 9, 2026
  2

  

• GWF-GWF exchanges ignore TVK hydraulic conductivity changes at exchange cells

  MODFLOW-ORG/modflow6#3125 · Filter by author mjreno opened on Nov 7, 2026
  1

• optional solid-phase and air-water interfacial sorption in the unsaturated zone for the UZT package.

  enhancement
  MODFLOW-ORG/modflow6#3120 · Filter by author rafiei-vahid opened on Nov 6, 2026

• XT3D discharge errors at coarse/fine DISU contacts with contrasting conductivity

  MODFLOW-ORG/modflow6#3104 · Filter by author oscarfasanchez opened on Nov 1, 2026
  2

• Remove system DLLs from Windows extended distribution?

  release
  MODFLOW-ORG/modflow6#3096 · Filter by author wpbonelli opened on Oct 30, 2026 · 6.9.0

• Development of the Richards flow capability as part of GWF

  enhancement
  MODFLOW-ORG/modflow6#3088 · Filter by author mjr-deltares opened on Oct 28, 2026

• SWI: steady-state single-fluid island model converges slowly

  bug
  MODFLOW-ORG/modflow6#3081 · Filter by author jdhughes-dev opened on Oct 26, 2026
  2

  

• mf5to6 accumulates segmented ETS records across stress periods

  bug
  MODFLOW-ORG/modflow6#3069 · Filter by author scantle opened on Oct 21, 2026
  1

  

• Add Multi-Point Boundary (MPB) package for GWF

  enhancement
  MODFLOW-ORG/modflow6#3058 · Filter by author mjr-deltares opened on Oct 16, 2026 · 6.9.0
  2

  

• True multi-reach junctions in the channel flow (CHF) model

  enhancement
  MODFLOW-ORG/modflow6#3038 · Filter by author aprovost-usgs opened on Oct 5, 2026

• bug(lak): IMPLICIT lakes ignore BUY density terms

  bug
  MODFLOW-ORG/modflow6#3025 · Filter by author jdhughes-dev opened on Oct 2, 2026 · 6.9.0

• FMI grid-equivalence check can be skipped entirely for a mismatched grid type

  MODFLOW-ORG/modflow6#2991 · Filter by author KR-Ravindra opened on Sep 16, 2026
  1

• Buoyancy constraint on a GWF-GWF exchange depends on the order the models are listed and is undocumented

  bug
  MODFLOW-ORG/modflow6#2982 · Filter by author jdhughes-dev opened on Sep 13, 2026 · 6.9.0
  2

  

• Allow the GWT and GWE IDOMAIN to be a subset of the GWF IDOMAIN

  enhancement
  MODFLOW-ORG/modflow6#2962 · Filter by author jdhughes-dev opened on Sep 2, 2026
  1

• docs(maw): SCRN_TOP and SCRN_BOT do not say what they measure

  MODFLOW-ORG/modflow6#2950 · Filter by author jdhughes-dev opened on Aug 27, 2026 · 6.9.0
  

• GWT: solute in water retained against drainage is not carried across time steps when specific yield is less than porosity

  MODFLOW-ORG/modflow6#2921 · Filter by author jdhughes-dev opened on Aug 12, 2026 · 6.9.0
  4

  

• GWT: gwfsatold omits the porosity when reconstructing the previous saturation

  MODFLOW-ORG/modflow6#2917 · Filter by author jdhughes-dev opened on Aug 11, 2026 · 6.9.0
  8

  

• UZF wave-creation tolerances are scaled as though the model length unit were feet

  bug
  MODFLOW-ORG/modflow6#2910 · Filter by author jdhughes-dev opened on Aug 7, 2026 · 6.9.0
  2

• Relax some input validations

  enhancementquestion
  MODFLOW-ORG/modflow6#2865 · Filter by author wpbonelli opened on Jun 25, 2026

• Treat GWF-GWF Exchanges Like GWF Packages in SSM Package for Child-Only Transport

  enhancement
  MODFLOW-ORG/modflow6#2838 · Filter by author MickeyRush opened on Jun 12, 2026
  4

• Restructure example notebooks

  documentationexamples
  MODFLOW-ORG/modflow6#2834 · Filter by author wpbonelli opened on Jun 12, 2026