Where should I drill a well on my land?

Signs of a good site

• Low points and valley floors, where rainwater converges and soaks in.
• Faults and fractures in hard rock (granite, schist, quartzite): water moves through these cracks.
• Permeable ground: alluvium, sand, fissured limestone, rather than clay and marl.
• Being near a wadi or an old riverbed, without sitting in the flood zone.
• Vegetation that stays green in summer while the rest of the landscape is dry.
• Gentle slopes, which give rain time to infiltrate.

Mistakes to avoid

• Drilling only where it is convenient (near the house or the road) without looking at the rest of the land.
• Copying the neighbour's borehole without accounting for faults and geology, which change within tens of metres.
• Drilling too close to a septic tank, a barn or a dump: the water may be polluted.
• Forgetting access for the drilling rig and power for the pump.

Find the best spots with BhdBlue

BhdBlue looks at all these signs at once, on every 30 m square of your land, using satellites and the geological map:

• Find your land on the map, draw its boundary or enter the GPS coordinates of its corners.
• Start the analysis: terrain, rocks, fractures, vegetation, rainfall, streams and soil are combined automatically.
• Get the 3 best sites with GPS coordinates, a map and a PDF report to show your driller.

Dug well or borehole?

A wide dug well suits a shallow water table, often on alluvial plains. A narrow, deep borehole is needed when water is in rock fractures or in a deep aquifer. Either way, the site matters as much as the depth. Before you start, check the permit rules with the water authority of your region.

Method and limits

Each analysis combines satellite-derived indicators (terrain, vegetation, drainage, lineaments), geological and climate datasets, and a multi-criteria GIS analysis (AHP) that estimates groundwater potential. It is neither a field measurement nor a geophysical survey. See the detailed method

• The 30 m grid is the spatial resolution of the analysis, not a guaranteed accuracy for a drilling spot.
• BhdBlue does not estimate the depth of the water table, its yield or volume, water salinity, or a probability of drilling success.
• The flow direction shown is that of surface water, derived from the terrain, not of the aquifer.
• Before a major borehole, have the spot confirmed by a hydrogeologist or an on-site geophysical survey.