Reconnaissance Study of the Relationship Between Lineaments and Fractures in the Southwest Portion of the Lake Chad Basin

Domain:

environment and energygeospatial

Record type:

paper

Creator:

SolTom

Publisher:

Env

Host:

One of the problems facing drought-stricken parts of the world is the location of potable sources of water. The delineation, verification, and study of the effect of fractures on groundwater resources and movement are essential parts of the hydrologic data set in drought-prone regions. In this reconnaissance study prominent lineaments were mapped from Landsat images of the Lake Chad region. A Wenner array resistivity profile 14 kilometers in length was made perpendicular to a lineament identified on Landsat images. The profile shows a segment with significantly lower resistivity values at the position of the lineament. Low total dissolved solids (TDS) values were also recorded for shallow groundwater samples near the lineament, suggesting it is a recharge zone. Prominent Landsat lineaments in this area are thus probably fractures, as suggested by the resistivity profile and TDS values, and should be investigated through more detailed geophysical and hydrogeological surveys.

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