Abstract
The hydrologic and water-quality characteristics of a small tropical riverine wetland at Ulakwo, near Owerri, Imo State, Nigeria, were evaluated by analysis of stream hydrographs, the groundwater flow system, and geochemical analyses. This research is an initial step toward providing information needed to develop a programme of sustainable development of the ecosystem. The wetland is underlain by a layer of organic debris and hydromorphic soils, which in turn are underlain by an unconfined alluvial sand aquifer about 80 m thick. Horizontal and upward vertical hydraulic head gradients of about 0.002 and 0.001, respectively, and the results of a flow-net analysis suggest that considerable amounts of groundwater flow into the wetland.
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