A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Geotechnical and environmental problems of the Niger delta
Abstract This paper examines the geotechnical and environmental problems arising from the peculiar characteristics (topography, geology, soil types including their properties and their areal distribution) of the Niger Delta area. The area is characterised by the widespread and irregular distribution of weak soils whose strength is further reduced by the presence of expansive clays. This causes foundation problems in roads, houses and embankments. Excavations are unstable because they are either made in very permeable sands which are subject to enormous seepage pressures or in weak, fat clays of low shear strength. Environmental problems include flooding, poor water quality and excessive river bank erosion and recession. While the surface waters are very turbid due to high clay and silt content the ground waters are very acidic (pH 4.5–5.5) and contain high proportions of nitrates, ammonia and chlorides which contaminate aquifers especially in the coastal and central portions of the delta area. River bank failure and recession of up to 2 to 3 m occur annually and continue to pose an enormous threat to the villages along the river banks.
Geotechnical and environmental problems of the Niger delta
Abstract This paper examines the geotechnical and environmental problems arising from the peculiar characteristics (topography, geology, soil types including their properties and their areal distribution) of the Niger Delta area. The area is characterised by the widespread and irregular distribution of weak soils whose strength is further reduced by the presence of expansive clays. This causes foundation problems in roads, houses and embankments. Excavations are unstable because they are either made in very permeable sands which are subject to enormous seepage pressures or in weak, fat clays of low shear strength. Environmental problems include flooding, poor water quality and excessive river bank erosion and recession. While the surface waters are very turbid due to high clay and silt content the ground waters are very acidic (pH 4.5–5.5) and contain high proportions of nitrates, ammonia and chlorides which contaminate aquifers especially in the coastal and central portions of the delta area. River bank failure and recession of up to 2 to 3 m occur annually and continue to pose an enormous threat to the villages along the river banks.
Geotechnical and environmental problems of the Niger delta
Okagbue, C. O. (author)
1989
Article (Journal)
Electronic Resource
English
BKL:
56.00$jBauwesen: Allgemeines
/
38.58
Geomechanik
/
38.58$jGeomechanik
/
56.20
Ingenieurgeologie, Bodenmechanik
/
56.00
Bauwesen: Allgemeines
/
56.20$jIngenieurgeologie$jBodenmechanik
RVK:
ELIB18
Geotechnical and environmental problems of the Niger delta
| Online Contents | 1989
Geotechnical characteristics of the meander belt soils of Niger Delta in Nigeria
| British Library Conference Proceedings | 2005
Health risks from environmental degradation in the Niger Delta, Nigeria
| Online Contents | 2016