We tell you where to drill, and how deep.
Spektral-Q is a measurement and analysis system. It gives the exact point and the depth window for a borehole that reaches mantle water, also called old water. This water sits deep in fractured rock, sealed off from rain and surface water by a tight layer of rock and soil above it.
It is built for places where shallow, rain-fed sources no longer keep up with demand.
- Upper inflow, where a smaller vein crosses the borehole
- Second inflow, deeper, where the next vein crosses the borehole
- Main inflow at the intersection of the fracture zones, the low point
- Overburden
- Crystalline basement
- Fracture zone
- Water-bearing vein
- Water rising from depth
- Inflow
1.0The problem: boreholes that come up dry
In hard-rock country there is often no continuous water-bearing layer. A borehole only yields water if it hits a water-bearing fracture or fault zone.
Example: Southern Africa. Much of the region sits on hard crystalline rock (granite, gneiss and greenstone belts), on Karoo rocks, and in the west under Kalahari sand. Here, too, yield depends on hitting a fracture or fault zone.
So the choice of the point decides everything.
Two boreholes fifty metres apart can differ tenfold in yield.
One can find water while the other finds none.
What water agencies see
- Dry and low-yield boreholes eat a large share of programme budgets. The financier pays, not the party that chose the point.
- Each drought cuts the recharge of shallow sources faster than demand falls. Repairing a failed shallow borehole does not bring the water back.
- Rivers shared between countries limit how much surface water each one can take.
- Cities, mines and farms compete with villages for the same basin.
- Many rural and peri-urban settlements will never be reached by a piped network at a sensible cost.
Spektral-Q deals with the first step: choosing the point. It turns siting from a gamble into a documented engineering decision.
2.0How the point is found
Spektral-Q works in five layers. Each layer narrows down the uncertainty left by the one before. No layer is enough on its own.
- L1
Structural reconnaissance
Satellite and aerial images, fault lines, old borehole records and regional tectonic maps.
Result: the areas worth surveying, and the layout of the field grid.
- L2
Field acquisition
A low-energy impulse source: no explosives, no vibrating trucks, no earthworks. Sensors record the full response of the rock at each grid point, along lines that cross the structure.
Result: a full-band record of how the rock responds, point by point.
- L3
Spectral analysis
The response is read on two independent axes. The frequency pattern shows where contacts in the rock lie. The Q factor, how fast the energy fades, shows whether a contact is filled with liquid or is tight rock on rock.
Result: a depth profile with ranked targets, each with its fill class.
- L4
Laboratory processing
Software processes the data and experts check every step. They rebuild the rock section and set the tolerances.
Result: the Drilling Specification (section 3.0).
- L5
Execution verification
Control measurements during drilling, a 24 to 72 hour pumping test to international standard, and a water quality analysis.
Result: the numbers are confirmed by a party independent of the driller.
Spektral-Q identifies the rock structure and what fills it. Whether that water is drinkable or usable is proven only in layer L5, by direct measurement and laboratory tests, never by geophysics alone.
3.0What you receive: the Drilling Specification
The result is a document a driller can execute. It serves as the technical annex to a drilling tender and as an input to the licence application.
| Item | Content |
|---|---|
| 1. Location | Coordinates of the drilling point, with a horizontal tolerance radius |
| 2. Depth | Target depth window with vertical tolerance; ranked alternative targets |
| 3. Method | Recommended drilling technology, diameter and borehole design |
| 4. Construction | Casing, cementing, and sealing off salty or polluted layers |
| 5. Programme | Schedule and cost estimate |
| 6. Logistics | Equipment and logistics the driller needs |
| 7. Records | As-built documents and control measurements to be delivered |
4.0How it is checked: six gates
The work passes six control gates. A gate opens only when the one before it is formally closed.
- SpecificationLayers L1 to L4
- ContractingAudit of the driller
- DrillingSupervised throughout
- Qualification24 to 72 h test and external laboratory
- AssemblyWellhead installed
- HandoverAcceptance and performance warranty
The geophysical risk stays with the technology provider.
An accredited third party confirms the yield before final acceptance.
5.0Selected locations
Selected locations only. All projects are subject to confidentiality agreements.
Point at or tap a marker to see the locations.
6.0From one borehole to a grid
One borehole solves a local problem. Many precisely sited boreholes can form a Decentralised Water Grid: a network of independent water points, each one placed where the water is used.
| Property of the grid | What it means |
|---|---|
| Independent nodes | Each node works on its own. Critical sites keep their water through network breakdowns, sabotage and extreme events. |
| Separate from the rain cycle | Supply does not depend on rainfall, on how a drought develops, or on rivers shared with other countries. |
| No long pipelines | No losses in transmission and no trunk mains to maintain. Areas far from any network can be served. |
| Built in modules | The grid grows node by node. Spending is linear and can follow public budget cycles and funding tranches. |
| Fast to deliver | A node is commissioned in weeks. Trunk infrastructure takes years. |
| Owned at home | The public entity owns the asset. It stays outside secondary markets and does not depend on imports. |
The grid works only if every node is sited precisely. Without that, it turns into a series of costly test boreholes with unknown results.
The Decentralised Water Grid is the business model built on Spektral-Q. It is published separately and covers the business models, economics, configurations, grid layouts, design basis and the path to a programme.
Read the Decentralised Water Grid7.0Safeguards and financing
Public buyers and development banks have rules to meet. This is how Spektral-Q fits them.
| Topic | How Spektral-Q meets it |
|---|---|
| Environmental and social footprint | The survey uses no explosives, no heavy vehicles, no digging, no access roads and no land. A small crew does the work. The impact at this stage is negligible, which makes environmental and social screening under development bank rules much simpler. |
| Siting separate from drilling | The Drilling Specification separates the choice of the point from the drilling contract. The company paid to drill is no longer the one that decides where to drill. |
| Payment for results | Each of the six gates is a clear, checkable milestone. They map directly onto disbursement-linked indicators, with third-party confirmation at qualification and handover. |
| Climate adaptation | Water outside the rain cycle adds real adaptation capacity. It does not add more load on a source that climate change already threatens. |
| Local work and skills | Local contractors drill, assemble and later operate, under supervision. Equipment, skills and maintenance stay in the country. |
| Data handover | All field records, sections and test results go to the implementing agency in documented form, ready for the national archives. |
8.0How to start
Work runs as a programme in three steps. Scope, schedule and financing are agreed at the Specification stage.
- 1
Feasibility study
For a defined area.
- 2
Single-node pilot
One borehole, delivered under the full six-gate protocol.
- 3
Multi-node programme
Contact
To request a feasibility study for a defined area, write to partnership@spektral-q.com. Tell us the country, the area and the demand you need to serve.