EVALUATION OF THE GEOLOGY, WATER RESOURCES AND GEOTECHNICAL PROPERTIES OF SOILS IN UGA AREA, SOUTHEASTERN NIGERIA

  • Ephraim Okpoko Department of Geology, Chukwuemeka Odumegwu Ojukwu University, Uli
  • Michael Egbunike
  • Ikechukwu Chidera
  • Ifeyinwa Nwike
  • Ifechukwu Nweze
Keywords: Geotechnical, Nanka Sands, Sub-base, Sub-grade, Uga, water resources

Abstract

Water is vital to life, ensures human survival and societal development.  Its overdraft and harnessing can affect the environment adversely. This study evaluates the water resources and geotechnical properties of soils in Uga area, south-eastern Nigeria. The study area lies in the rainforest zone where rainfall is extreme and thus boasts of high water resources potential. Comprehensive data are lacking for effective water planning purposes. This research work contributes to existing data on the water resources potentials of Uga and environs. Surface waters (Obiada River and Agwura Stream), springs (Nwagene, Obizi and Ogbei Springs) abound in the area. Nanka Sands which is a prolific water-bearing unit defines the underlying geology of the area. Flow rates of surface waters are high due to annual precipitation of 2500mm a year. Springs are clear. Nwangene Spring has a flow rate of 0.39 m/sec while Obizi spring has a flow rate of 0.04 m/sec. Borehole depth at Nanka and Oko is 380 meters and 314 meters respectively while static water level is 42 meters and 69 meters respectively. Huge sand deposits abound in the area. This research work highlighted the geotechnical properties of soils from the area. Cobble, pebble and gravel sized grains are absent. CBR values ranged from 30% to 35%. Highest MDD gave a value of 1-824gcm-3 with an OMC of 11%. The lowest MDD recorded a value of 1.622gcm-3 with an OMC of 8%. LI test conducted on one of the samples yielded a value of 16%. PL and PI tests gave zero values for all the samples. The geotechnical results implied that soils from the area are excellent to good reserves for sub-grade and sub-base materials respectively.

Author Biography

Ephraim Okpoko, Department of Geology, Chukwuemeka Odumegwu Ojukwu University, Uli

Ephraim Ifeacho Okpoko is a Senior Lecturer in the Department of Geology, Chuwkuemeka Odumegwu Ojukwu University Anambra State Nigeria. He holds a Bachelors of Science degree in Geology and a Masters degree in Water Resources and Environmental Geology and currently a Doctorate Research candidate in Hydrogeology. His research areas of interest are Water Resources/Planning/Development/Management, Environemntal Hazards, Water Treatment, Geotechnical Studies and Groundwater Geophysics. He has published papers in Local and International Journals, attended and presented papers in Local and International conferences. He has served meritoriously in public bodies, at community, institution and Government levels. His core values include; honesty, discipline, commitment and hardwork. His hobbies are writing, reading travelling for relaxation and knowledge.

Published
2019-05-28
How to Cite
Okpoko, E., Egbunike, M., Chidera, I., Nwike, I., & Nweze, I. (2019). EVALUATION OF THE GEOLOGY, WATER RESOURCES AND GEOTECHNICAL PROPERTIES OF SOILS IN UGA AREA, SOUTHEASTERN NIGERIA. Coou African Journal of Environmental Research, 1(2), 130-145. Retrieved from https://ajer.coou.edu.ng/index.php/journal/article/view/24