Rio Grande Project Drought Resilience Efforts (DRE) Initiative

Modeling for the Rio Grande Project Drought Resilience Efforts (DRE) Initiative

Repo overview

This repo contains a minimal setup for running a rainfall/runoff workflow with gridded inputs.

• run.sh
  main runner script containing the shell commands for running grass modules in sequence.

• data/
  rainfall depth inputs (text files), e.g. rain_1h_depths.txt, rain_24h_depths.txt.

• spatial_data/
  geospatial rasters used by the workflow:

  • dem.tif: original dem
  • dem_modified.tif: processed dem used for modeling
  • esa.tif: land cover raster
  • n_low.tif: manning n (low roughness) raster
  • hsg.md: notes/metadata for hydrologic soil group inputs

• LICENSE
  project license.

PRISM rainfall processing workflow

This repo also includes a GRASS + Bash + R workflow to download PRISM climate rasters and compute area-weighted watershed time series for precipitation and temperature.

Scripts

• import_prism_rasters.sh — import PRISM zip rasters into GRASS
• create_prism_grid_4km.sh — build PRISM 4 km grid vector
• union_prism_area_grid.sh — intersect grid with watershed and compute cell areas
• calc_weighted_avg_prism.sh — compute area-weighted daily ppt/tmax/tmin
• prec_analysis.R — precipitation statistics and plots

Run order

Run inside an active GRASS GIS session:

# 1. Download PRISM rasters
m.prism.download dataset=0,2,4 start_date=1990-01-01 end_date=2023-12-31

# 2. Import and process
bash import_prism_rasters.sh
sh create_prism_grid_4km.sh
sh union_prism_area_grid.sh
sh calc_weighted_avg_prism.sh

# 3. R analysis
Rscript prec_analysis.R