McDoman/Seasonal-Drought-Simulation

Interactive Growing Season (Jun-Sep) Drought Simulation Dashboard for Northwestern Nigeria. Computes MI-CDI, VCI, TCI, VHI, TVDI, SPI, SPEI indices across 186 LGAs using 2001-2023 seasonal baselines. # Seasonal Drought Simulation Dashboard An interactive web-based growing season (June–September) drought simulation tool for Northwestern Nigeria, covering 186 Local Government Areas (LGAs) across seven states: Sokoto, Zamfara, Katsina, Kano, Jigawa, Kaduna, and Kebbi. ## 🌐 Live Dashboard **Launch the Seasonal Drought Simulator →** ## Overview This dashboard enables real-time **what-if analysis** of drought conditions using five input parameters: | Parameter | Symbol | Source | |-----------|--------|--------| | Precipitation | P (mm) | CHIRPS Daily | | Land Surface Temperature | LST (K) | MODIS MOD11A2 | | Vegetation Index | NDVI | MODIS MOD13A3 | | Potential Evapotranspiration | PET (mm) | TerraClimate | | Palmer Drought Severity Index | PDSI | TerraClimate | ## Computed Indices The simulator calculates **9 drought indices** per LGA: | Index | Formula | Range | |-------|---------|-------| | VCI | 100 × (NDVI − min) / (max − min) | 0–100 | | TCI | 100 × (max − LST) / (max − min) | 0–100 | | VHI | 0.5 × VCI + 0.5 × TCI | 0–100 | | TVDI | (LST − min) / (max − min) | 0–1 | | SPI | (P − mean) / std | Unbounded | | SPEI | (D − mean) / std, D = P − PET | Unbounded | | ADI | (d_VHI + d_TVDI) / 2 | 0–1 | | MDI | (d_SPI + d_SPEI + d_PDSI) / 3 | 0–1 | | **MI-CDI** | **(ADI + MDI) / 2** | **0–1** | ## Features - 🗺️ Interactive Leaflet.js choropleth map with dynamic color scaling - 📊 Real-time computation of all indices on parameter change - 🏛️ State boundary overlays with dashed LGA boundaries - 🔍 Click-to-zoom on Highest/Lowest MI-CDI cards - 📥 CSV download of simulation results - 🌍 "All States" view for region-wide analysis ## Baseline Period Historical baselines are derived from **23 years** of Google Earth Engine data (2001–2023), filtered exclusively to the **June 1 – September 30** growing season window. Baseline statistics (min, max, mean, std) are computed per LGA per parameter. ## Technology Stack - **Frontend**: HTML5, CSS3, Vanilla JavaScript - **Mapp …