v0.8.4

What's New in v0.8.4

Features

Parallel Execution

• Add configurable SUMMA parallel backend (local / slurm) with automatic fallback when SLURM is unavailable (#121)
• Add intra-iteration parallel GRU execution for SUMMA calibration (#118)
• Add local ThreadPoolExecutor backend as alternative to SLURM for parallel SUMMA runs

Routing & Model Integration

• Add mizuRoute routing support for ngen SAC-SMA and TOPMODEL modules (#117)
• Add SUMMA+mizuRoute glacier configuration for Iceland national model
• Route mizuRoute final-evaluation output into the correct output tree (#119, #122)
• Allow log transforms on SUMMA calibration parameter bounds via config-level overrides (#122)

Calibration & Optimization

• Generalize multi-gauge calibration infrastructure for HYPE, FUSE, and SUMMA
• Add SCE-UA contraction step and per-complex parallelization strategy (#110)
• Add option to specify initial guess for optimizer (#114)
• Improve regionalization transfer function attribute mappings for SUMMA and HYPE (#113)

Data & Attributes

• Add ATTRIBUTE_PROFILE config with CAMELS-SPAT and full profile presets (#108, #109)
• Add glacier fraction to climate statistics and HYPE regionalization
• Add glacier_fraction column to HYPE GeoData.txt

Infrastructure

• Add Docker Compose file and per-method install Dockerfiles for validation
• Add CI lint guards to pre-commit hooks

Bug Fixes

SUMMA

• Enforce k_macropore >= k_soil physical constraint
• Guard empty time dimension in worker time precision fix
• Tighten parameter bounds to prevent SIGSEGV crashes
• Resolve mizuRoute output path in final evaluation

HYPE

• Align Pobs subbasin IDs with GeoData +1 shift
• Use coastal basins for GeoData + disable readobsid for multi-gauge
• Include all IGBP attributes in land-use regionalization loader

Calibration

• Fix async-DDS: NUMBER_OF_ITERATIONS now means total batches, not per-process target (#116)
• SCE-UA: CCE always accepts random point if reflection and contraction both fail
• Fix number_of_evolution_steps config returning None instead of falling through to default

Other

• Filter forcing files by dataset name to prevent grid mismatch
• Fix ngen Snow-17 BMI library filename; stop SLoTH sub-build from falsely failing
• Fix FUSE: use equal-area projection (EPSG:6933) for catchment area calculation
• Docker: pin GDAL Python bindings, align apt lists across install methods

Performance

• Vectorize climate statistics computation across all HRUs

Workshop & Examples

• Revised Logan River workshop notebooks for lumped HBV, SUMMA, async-DDS, and distributed workflows
• Add /tmp redirect and emergency fallback to 04a notebook for environments with limited disk
• Corrected Bow at Banff bounding box in lumped config example

Contributors

• Darri Eythorsson (@DarriEy)
• Tristan Montoya (@tristanmontoya)
• Peter Wagener (@peterwagener)
• Andrew Preucil (@apreucil)
• Lindsay Parker (@peterwagener)