Study on the Effects of Hydraulic Dredging and Disposal Operations on Water Quality of Nworie River, South-Eastern Nigeria
International Journal of Environmental Monitoring and Analysis
Volume 5, Issue 2, April 2017, Pages: 25-31
Received: Jan. 28, 2016;
Accepted: Sep. 12, 2016;
Published: Mar. 11, 2017
Views 2113 Downloads 83
Justina Ugochi Udensi, Department of Biotechnology, Federal University of Technology, Owerri, Nigeria
Toochukwu Ekwutosi Ogbulie, Department of Biotechnology, Federal University of Technology, Owerri, Nigeria
Emeka-Nwabunnia Ijeoma, Department of Biotechnology, Federal University of Technology, Owerri, Nigeria
Nkeiruka Uche Chikezie, Department of Biotechnology, Federal University of Technology, Owerri, Nigeria
Ugochukwu Mmasi Godson, Biology Department, Alvan Ikoku Federal University of Education, Owerri, Nigeria
Awurum Ivy Nwaku, Biology Department, Alvan Ikoku Federal University of Education, Owerri, Nigeria
Ifeyinwa Celestina Mgbemena, Department of Biotechnology, Federal University of Technology, Owerri, Nigeria
Follow on us
A study was done to ascertain the effect of hydraulic dredging and spoils disposal on the physicochemical parameters of Nworie River. The study was carried out from July 2010 to January, 2012. Water samples were collected prior to, during and monitored several months after dredging. The samples were collected from 5 stations: station 1 was the dredging point, stations 2 and 3 were 250m and 500m upstream of the point, while and stations 4 and 5 were 250m and 500m downstream of it respectively. The physicochemical parameters of the water were analysed prior to dredging and most of the values obtained were within acceptable limit of established water standards. The pH was within the range of 6.5-7.8, Temperature 27.6-29.9°C, Conductivity 34-196µs/cm, Turbidity 0-76NTU, TDS 22.1-127.4 mg/l, TSS 9-51 mg/l, Nitrate 1.2- 33.6mg/l, Phosphate 0.2-3.7mg/l, Sulphate 0- 33 mg/l, Dissolved Oxygen 4.3-9.4 mg/L and BOD5 2.5 - 7.9 mg/l. During the dredging, the water physicochemistry changed: pH values decreased drastically to 4.6, DO to 1.3mg/l, Nitrate to 1.2 mg/l. Temperature increased to 30. 2°C, Turbidity 620NTU, TSS 349mg/L, Conductivity 498µs/cm, TDS 249 mg/l, BOD5 19.1mg/l, Sulphate 33mg/l and Phosphate was 0.92mg/l. Three months after the dredging, the values for the parameters returned to their pre-dredging concentrations, however during rainy season, as the leachates and silts from the spoils were washed into the river, this prolonged the recovery of the river system to 9 months. This implies that the effect of dredging on the river is of short term but the disposal of the excavated materials at the river bank compounded and prolonged these impacts.
Hydraulic, Dredging, Disposal Operations, Quality, Physiochemical, Nworie River
To cite this article
Justina Ugochi Udensi,
Toochukwu Ekwutosi Ogbulie,
Nkeiruka Uche Chikezie,
Ugochukwu Mmasi Godson,
Awurum Ivy Nwaku,
Ifeyinwa Celestina Mgbemena,
Study on the Effects of Hydraulic Dredging and Disposal Operations on Water Quality of Nworie River, South-Eastern Nigeria, International Journal of Environmental Monitoring and Analysis.
Vol. 5, No. 2,
2017, pp. 25-31.
Copyright © 2017 Authors retain the copyright of this article.
This article is an open access article distributed under the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/
) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Agunwamba, J. C Onuoha, K. C and Okoye, A. C (2011) Potential effects on the Marine Environment of Dredging of the Bonny channel in Nigeria Delta. Environmental monitoring Assessment Springer Science 10 (7) 61-65.
Alinnor, I. J and Obiji, I. A (2010). Assessment of Trace metal composition in fish samples from Nworie River. Pakistan Journal of Nutrition 9: 81-85.
APHA (American Public Health Association) (1995) Standard methods for the Examination of water and waste water. 5thed APHA/ AWWA/ WPCF. Washington, D. C 946p.
Delaune, R. D and Smith C. J (1995) Release of Nutrients and Heavy metals following oxidation of freshwater and saline sediments. Journal of Environment Quality 14: 167-168.
Federal Environmental Protection Agency (1991) Guidelines and standards for environmental pollution and control in Nigeria. FEPA decree 58 of 1988.
HACH (1997) HACH DR/2010 Spectrophotometric hand book. Hach Company, USA pp 147- 303.
Ihejirika, E. I Nwachukwu. M. I, Udensi. J. U, Ihejirika, O. C and Agbaegbu, M. C. (2011) Management Consequences and Diseases Transmission Potentials of Dredge sediments from Nworie River Owerri Eastern Nigeria. Journal of Biodiversity and Environmental science 1 (5): 32-38.
ISEPA / MPE (2008). Environment impact Assessment of Nworie River Imo State Enviornment protection Agency / Ministry Petroleum and environment Draft Report pp 7-48.
Lewis, M. A, Wiber, D. E., Stanley, R. S and Moore, J. C (2001) Dredging Impact on Urbanized Florida Bayou: Effects on Benthos and Algal Periphyton. Environ Poll. 115: 81-85.
Narayanan, P. (2011) Environmental Pollution: Principles Analysis and Control. Satish Kumar Jain, New Delhi India pp. 127-183.
NIS (Nigerian Industrial Standard), (2007). Nigerian Standard for Drinking Water Quality. Standard Organization of Nigeria (SON) Governing Council, Lagos, Nigeria. Pp. 14-19. www. http://ng-publications-nigerian-standard-for-Drinking-water-quality-pdf. Assessed. 12th Oct., 2012.
Nwigwe, H. C (2011) Aquatic Resource Management. A tool for food security in Nigeria. 19th Inaugural Lecture of Federal University of technology Owerri Nigeria 72p.
Ohimain, E. I and Andriesse, W. (2004) Environmental impacts of Abandoned dredge spoils and sediments. Available options for their handling restoration and rehabilitation. Journal of soil and sediment 4: 59-65.
Ohimain E. I Imoobe, F. I and Bawo, D. D. S (2008). Changes in water physicochemical properties following the dredging of an Oil Well Access Canal in the Niger Delta. World Journal of Agric Sci. 4 (6) 752-758.
Okpokwasili, G. C. and Ogbulie, J. N (1993) Bacterial and metal quality of Tilapia (Oreochromisnolitica) Aquaculture systems. International Journal of Environmental Health Research 3: 190-202.
Otuknedor T. V and Obiukwu. C (2005) impacts of Refinery effluent on the physicochemical Properties of Water Body in the Niger Delta. Applied Ecdogy and Environmental Research 3 (1): 61-72.
Perin, G, Fabris, R. Robello-Wagener, C. H and Scotto, C. (1997) A five year study on the heavy metal pollution of Guanabara Bay sediment and Evaluation of metal Bioavailability by means of Geological speciation. Water Research. 31 (12) 3017-3028.
Reavell, P. E (1997) The effects of dredging on light penetration in the Boro River, Okarango Delta, Botswana, Water Resources 23. 109-114.
Singh, S. P, Tack F M. G and Verloo M. (1998) Land Disposal of heavy metal contaminated dredged sediment. A Review of Environmental Aspects Land contamination and Reclamation 6 (3): 1-19.
Smith, S. D. K and Rule M. J (2011) The effects of dredge spoil dumping on a shallow water soft. Sediment community in the solitary Island marine Park, NSN, Australia, Marine pollution bulletin 42 (11). 104-104.
Udensi J. U and Opara. F. N (2011) Waste to Wealth: An Approach to Environmental management. International Journal of environmental Health and Human Development. 12 (2) 66-70.
USEPA/USACE (1998). Evaluation of Dredged Material proposed for Discharge in waters of the US. Inland testing Manual Report No. EPA-823-398-004. P. 391.
WHO (World Health Organization) (2006) Guideline for Drinking water quality. Incorporating 1st and 2nd Addenda, Vol. 1, recommendations, 3rd ed: WHO, Geneva, Switzerland.
Umunnakwe, J. E., and Nnaji, A. O. (2015) Use of water Pollution Index to Assess the level of Dissolved Organic and Inorganic Substances in Nworie River Owerri, Imo State, Nigeria. Civil and Environmental Reearch. 7 (4).
Ekeanyanwu, R. C., Nwokedi, C. L. and Noah, U. T. (2015) Monitoring of Metals in Tilapia nilotica tissues, bottom Sediments and water from Nworie River and Oguta Lake in Imo State, Nigeria. African Journal of Environmental Scienceand Technology. 9 (8): 682-690.
Onyekuru, S. O., C. N. Okereke, S. I. Ibeneme, A. O. Nnaji, C. Z. Akaolisa, C. A. Ahiarakwem, Ukwe L. N. (2014) An Evaluation of Spatial Distribution of the Physicochemical and Microbiology Contents of Nworie River Owerri, South-eastern, Nigeria. British Journal of Applied Science and Technology. 4 (5): 1-10.