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wflow

Runs and validates wflow_sbm hydrology and wflow_sediment simulations via Julia pipeline tools.

155|6|Updated Mar 31, 2026
Search Tags:#julia#hydrology#wflow#model coupling#forcing conversion#sediment transport#distributed model
One-click install
npx skills add https://github.com/lzwei196/KISS-Knowledge-Infrastructure-for-Scientific-Simulation --skill wflow-lzwei196
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: wflow
Source: https://github.com/lzwei196/KISS-Knowledge-Infrastructure-for-Scientific-Simulation/tree/main/models/wflow
Command: npx skills add https://github.com/lzwei196/KISS-Knowledge-Infrastructure-for-Scientific-Simulation --skill wflow-lzwei196

SYSTEM DOCUMENTATION & REQUIREMENTS

💡 This Skill requires xarray, netCDF4, numpy, pandas, geopandas, shapely, matplotlib, pyyaml, hydromt_wflow, and includes scripts (resource) and references (resource) components.

What problem does it solve? Running Deltares' wflow distributed hydrological model correctly requires deep operational knowledge: Julia environment setup, TOML v1.0 configuration, NetCDF forcing in exact units, cycle-free flow networks, and sediment parameterization. This Skill packages that expertise so an AI agent can build, run, validate, and couple wflow_sbm and wflow_sediment models without silent scientific errors. ## Core Features & Use Cases - End-to-end pipeline: 24 tools across 10 stages covering configuration, HydroMT model building, CMFD/MSWX forcing conversion, PET calculation, TOML generation, Julia execution, discharge extraction, and sediment analysis. - Diagnostic recovery: 39 diagnostic triplets map symptoms (e.g., LDD cycles, Kelvin-vs-Celsius forcing, double-counted routing with CaMa-Flood) to validated remedies. - Coupling and validation: Export unrouted runoff to CaMa-Flood, recharge to MODFLOW, compare discharge against VIC with NSE/KGE metrics, and derive USLE K/C factors from HWSD and AVHRR data. - Use Case: Ask the agent to simulate discharge for the Bengbu basin (2003-2005) with CMFD forcing; it builds staticmaps.nc, converts forcing, generates the v1.0 TOML, runs Wflow.jl in 14 seconds, and validates the hydrograph. ## Quick Start Run preflight_check.py in this KI directory, then ask the agent to build and run a wflow_sbm simulation for your basin by providing the outlet coordinates, period, and forcing dataset.

Frequently Asked Questions about wflow

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I run a wflow_sbm hydrology simulation for a new basin?▼

Provide the basin outlet coordinates, period, and forcing dataset, then follow the staged pipeline: generate the config, build staticmaps.nc, convert forcing to NetCDF, generate the v1.0 TOML, and execute via run_wflow.py. The Bengbu basin setup is production-validated as a reference.

How does wflow compare to VIC for distributed hydrology?▼

wflow uses Julia with TOML config, NetCDF I/O, built-in kinematic-wave or local-inertial routing, and a native sediment module. VIC uses C with flat-text config, ASCII forcing, external routing, and no sediment. The compare_with_vic.py tool computes NSE, PBIAS, and KGE between them.

Why does my wflow run crash with cycles detected in the flow graph?▼

Naive D8 flow direction on coarse grids creates reciprocal flows in flat areas. Use the stage-1 builder with WhiteboxTools breach_depressions and d8_pointer, or MERIT-Hydro flow directions on low-relief basins, and verify n_outlets equals exactly 1.

Can wflow output be coupled to CaMa-Flood or MODFLOW?▼

Yes. wflow_to_cama.py exports unrouted runoff for CaMa-Flood (never send routed q_river, which double-counts routing), and wflow_recharge_to_modflow.py converts groundwater recharge from mm/day to m/day for MODFLOW boundary conditions.

What forcing units does wflow require?▼

Precipitation must be mm per timestep (mm/day for daily runs, not mm/s), temperature in degrees Celsius (subtract 273.15 from Kelvin sources like CMFD), and PET must be supplied, computed via calculate_pet.py using Hargreaves or Penman-Monteith.

Why is the first wflow run so slow?▼

Julia's JIT compilation causes a 30-60 second delay before output appears on the first run; this is normal, not an error. After compilation, the validated Bengbu run completed 1,096 timesteps over 224 cells in 14 seconds.

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