Water points around Bitkine
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[Included in accordance with the AOWIS AI Usage Guide (REQ-AI-007, REQ-AI-008) and MAY require verification and/or post-editing.]
This page documents actual known wells, boreholes and other water sources around Bitkine.
It is intended as a field inventory. Geological interpretation and proposed future drilling locations are documented separately under Groundwater prospecting.
Water-point information should distinguish clearly between:
- measured values;
- information reported by owners or operators;
- approximate or historical values;
- observations that still require confirmation.
Inventory
| Name | Type | Location | Depth | Yield | Water quality | EC | Current use | Status |
|---|---|---|---|---|---|---|---|---|
| Restaurant Complex | Borehole / well | coordinates to add | unknown | ~3 m³/h during March–June | to confirm | not yet measured | Local use | Existing |
| Djaborona Church | Borehole / well | coordinates to add | unknown | ~2 m³/h during March–June | to confirm | not yet measured | Local use | Existing |
| Elie Tchere | Borehole / well | coordinates to add | unknown | ~3 m³/h during March–June | to confirm | not yet measured | Local use | Existing |
The reported yields above are field information and should be replaced or supplemented by measured pumping-test data where available.
Additional known water points should be added as their location and ownership are confirmed.
Water quality
Local observations indicate that both potable and noticeably saline groundwater occur around Bitkine.
At present, water described as salty is primarily a field description. The actual hydrochemical type has not yet been established for most local sources.
Electrical conductivity should therefore be measured for every accessible water point.
A minimal field record should include:
- electrical conductivity (µS/cm);
- temperature;
- pH;
- pumping rate;
- duration of pumping before sampling;
- taste or other field observations;
- current use of the water.
For selected representative wells, laboratory analysis should include:
- sodium;
- potassium;
- calcium;
- magnesium;
- chloride;
- sulfate;
- bicarbonate / alkalinity;
- nitrate;
- fluoride;
- iron;
- manganese;
- microbiological parameters.
Different dissolved salts do not necessarily produce the same taste. A water described as salty may be dominated by sodium chloride, sodium bicarbonate, calcium or magnesium salts, or a mixture of several major ions.
Electrical conductivity
Electrical conductivity is one of the most useful rapid measurements for comparing local groundwater.
Conductivity is recorded in microsiemens per centimetre (µS/cm) and provides an indication of the total concentration of dissolved ions.
Repeated measurements are preferable to a single value, particularly in fractured-rock boreholes.
A useful pumping record is:
| Time | Pumping rate | Water level | EC | Temperature | pH | Notes |
|---|---|---|---|---|---|---|
| Before pumping | ||||||
| 5 min | ||||||
| 15 min | ||||||
| 30 min | ||||||
| 1 h | ||||||
| 2 h | ||||||
| 4 h | ||||||
| 8 h |
Changes in EC during pumping can indicate changing contributions from different fractures.
A decreasing EC may indicate displacement of stagnant or more mineralised water by a fresher source.
An increasing EC may indicate that continued drawdown is recruiting a more mineralised fracture or groundwater body.
Such interpretations require repeated measurements and should not be inferred from taste alone.
Seasonal behaviour
Water-point yield should be recorded throughout the year.
The late dry season is particularly important because a well that performs well shortly after the rainy season may provide substantially less water several months later.
For each important water point, useful seasonal observations include:
| Date | Season | Static water level | Pumping rate | Pumping duration | EC | Notes |
|---|---|---|---|---|---|---|
Where possible, the same pumping method should be used for repeated measurements so that results remain comparable.
Individual water-point pages
Water points with sufficient information may receive dedicated subpages.
Suggested structure:
- Regions:Chad/Guéra/Bitkine/Water_points/Restaurant_Complex
- Regions:Chad/Guéra/Bitkine/Water_points/Djaborona_Church
- Regions:Chad/Guéra/Bitkine/Water_points/Elie_Tchere
An individual page can contain:
- precise coordinates;
- photographs;
- owner or operator;
- construction date;
- borehole depth;
- casing and screen information;
- pump type;
- measured yield;
- seasonal behaviour;
- EC measurements;
- laboratory chemistry;
- pumping-test results;
- current use;
- maintenance history;
- nearby water points;
- field notes.
Data quality
Field information should retain its source.
Values reported verbally by an owner should be marked as reported values until they are independently measured.
Approximate coordinates should not be presented as survey-quality positions.
Water described as potable should not be considered microbiologically safe without appropriate testing.