GROUNDWATER FLOW DIRECTION AND POLLUTION MANAGEMENT STRATEGIES FOR IGBO-OLOMU, IKORODU, LAGOS STATE, NIGERIA
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Date
2021
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Dimitrie cantemir Christian university, faculty of management in tourism and commerce tourism
Abstract
The study used hydrogeological measurements from thirteen wells to illustrate the pattern of groundwater movement in Igbo Olomu area of Ikorodu, Lagos, Nigeria. Data used include information on well coordinates, elevation at well openings, static water level (SWL) and hydraulic head (HH). Data on coordinates of well locations and elevation at well openings with respect to mean sea level were taken using GPS (Garmin 76 csx) while data on static water level in each well was taken with measuring tape. The hydraulic head for each of the thirteen wells was computed as the difference between elevation at well opening and static water level. Findings indicates that hydraulic heads ranges between 33.77
and 36.94m while static water level ranges between 2.35 and 7.36m. The static water level however exhibits greater variability (27.71) than hydraulic head (22.11). The local groundwater flow direction for the study area was subsequently determine manually by triangulation from water table contour map generated from data on static water level. The result of the study further shows that groundwater flow direction in the study area is predominantly towards the north-eastern part of the city. The observed flow pattern thus suggest that groundwater in the south-eastern part of the
study area are susceptible to contamination from infiltrated water from sanitary landfills and dumpsites and from underground leakage of sewage and petroleum facilities. The study finally recommended environmental
legislation, land-use planning, enforcement and environmental education as management options that can be taken by authority concerned in protecting groundwater from pollution in the study area.
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Keywords
Groundwater, Pollution, Elevation, Hydraulic head, Management