ARGOUBI25/tunisia-groundwater-depletion

Code and data for: Satellite-Based Big Data Analysis of Groundwater Depletion and Water Stress Dynamics Under Climate Change in Arid Regions — Tunisia 2002–2024 > **Majdi Argoubi** · University of Sousse, Tunisia > > **Khaled Mili** · Corresponding author ✉️ --- ## 📖 About This repository provides the **complete, reproducible pipeline** for the paper: > *Satellite-Based Big Data Analysis of Groundwater Depletion and Water Stress Dynamics Under Climate Change in Arid Regions: A Case Study of Tunisia* > **Frontiers in Big Data** — Data-driven Climate Sciences (2025) We integrate **GRACE/GRACE-FO**, **ERA5**, **MODIS NDVI**, and **GLDAS** through a modular 9-module Python pipeline to analyse groundwater storage anomalies (GWSA) across three hydro-climatic zones in Tunisia over 2002–2024, and project future trajectories through 2030 under SSP2-4.5 and SSP5-8.5. --- ## 🗺️ Study Area Tunisia is divided into **three hydro-climatic zones**: | Zone | Latitude | Precipitation | Key aquifer systems | |------|----------|--------------|---------------------| | 🟢 **North** | 34–37.5°N | 400–1500 mm/yr | Coastal phreatic, Zaghouan | | 🟡 **Central** | 32–34°N | 150–400 mm/yr | Kairouan, Continental Intercalaire | | 🔴 **South** | 30–32°N | | Zone | Sen's slope | Cumulative depletion | 2023–2024 stress | |------|------------|----------------------|-----------------| | 🟢 North | −0.525 cm EWH yr⁻¹ *** | −11.6 cm EWH | **92% High/Critical** ⚠️ | | 🟡 Central | −0.503 cm EWH yr⁻¹ *** | −11.1 cm EWH | 56% High/Critical | | 🔴 South | −0.313 cm EWH yr⁻¹ *** | −6.9 cm EWH | 56% High/Critical | *\*\*\* p **No groundwater recovery is projected through 2030 under any emission scenario.** --- ## 🔬 Pipeline Overview ``` GRACE/GRACE-FO ──┐ ERA5 (P, T2m) ──┤ MODIS NDVI ──┤──► 01 Preprocessing ──► 02 Gap Filling ──► 03 Downscaling (1 km) GLDAS NOAH/VIC ──┘ │ │ │ └────────────────────┴────────────────────┘ │ ┌────────────────────▼────────────────────┐ │ 04 Feature Engineering │ └────────────────────┬────────────────────┘ │ ┌──────────────┬───────────────────┼─────── …