🗺️ Map Legend
🪨 Lithology Types
Basalt
Columnar flows
Fractured zones
Alluvium
Sands / Gravels
High infiltration
🌧️ Rainfall Zones (mm/year)
< 500 mm
Arid / semi-arid
500–1000 mm
Moderate
> 1000 mm
High rainfall
🌊 Groundwater Depth (meters)
0–5 m
Very shallow
5–15 m
Accessible
> 15 m
Deep
🏙️ Major Cities
City Markers
Major urban centres