Sediment and Water Quality Characteristics of Ubelle Stream, Ogugu, Olamaboro, Kogi State, Nigeria
Abstract
Sedimentation is a process that erods and transports soil particles into water bodies. Sediment reduces storage capacity, lifespan of stream basins, water quality.The Ubelle stream was 465m length, 25 to 45m width and 60m depth. The stream basin served the people of the community as a multipurpose stream for fishing, swimming, laundry and sources of water for domestic uses. Soil analysis showed, excess sediment has been transported into the stream basin within a period of 15 years. Siltation occupied 57.07m, out of the 60m, leaving 1.00 to 2.93m in depth.This reduced the water storage and w a t e r q u a l i t y . Soil samples analysis w a s dominated by very fine sand, ranging between 84.08 to 85.57 %. These indicate silty-clay soils silted the stream basin. Porosity ranged from 6 to 14%. This is low, indicating the soil is dense with low volume of voids relative to the volume of solids; meaning, it is more porous, less cohesive; and prone to erosive forces. Bulk density ranged from 2.27- 2.50g/cm 3 . This is high compared to average standard values of 1.33g/cm 3 . High bulk density reduces infiltration of water into the soil and increases overland flow resulting in erosion. Therefore the stream basin was silted by silty-clay soils. Being a multipurpose stream; the physico-chemical parametres of the stream water was not suitable for drinking, but suitable for aquaculture. Erosion control measures like vegetative covers, afforestation along the river bed will avoid more soil loss. The stream water should be treated before use for drinking and other domestic uses.
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