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.
| Published in | International Journal of Environmental Monitoring and Analysis (Volume 5, Issue 2) |
| DOI | 10.11648/j.ijema.20170502.12 |
| Page(s) | 25-31 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2017. Published by Science Publishing Group |
Hydraulic, Dredging, Disposal Operations, Quality, Physiochemical, Nworie River
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APA Style
Justina Ugochi Udensi, Toochukwu Ekwutosi Ogbulie, Emeka-Nwabunnia Ijeoma, Nkeiruka Uche Chikezie, Ugochukwu Mmasi Godson, et al. (2017). 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, 5(2), 25-31. https://doi.org/10.11648/j.ijema.20170502.12
ACS Style
Justina Ugochi Udensi; Toochukwu Ekwutosi Ogbulie; Emeka-Nwabunnia Ijeoma; Nkeiruka Uche Chikezie; Ugochukwu Mmasi Godson, et al. Study on the Effects of Hydraulic Dredging and Disposal Operations on Water Quality of Nworie River, South-Eastern Nigeria. Int. J. Environ. Monit. Anal. 2017, 5(2), 25-31. doi: 10.11648/j.ijema.20170502.12
AMA Style
Justina Ugochi Udensi, Toochukwu Ekwutosi Ogbulie, Emeka-Nwabunnia Ijeoma, Nkeiruka Uche Chikezie, Ugochukwu Mmasi Godson, et al. Study on the Effects of Hydraulic Dredging and Disposal Operations on Water Quality of Nworie River, South-Eastern Nigeria. Int J Environ Monit Anal. 2017;5(2):25-31. doi: 10.11648/j.ijema.20170502.12
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Download@article{10.11648/j.ijema.20170502.12,
author = {Justina Ugochi Udensi and Toochukwu Ekwutosi Ogbulie and Emeka-Nwabunnia Ijeoma and Nkeiruka Uche Chikezie and Ugochukwu Mmasi Godson and Awurum Ivy Nwaku and Ifeyinwa Celestina Mgbemena},
title = {Study on the Effects of Hydraulic Dredging and Disposal Operations on Water Quality of Nworie River, South-Eastern Nigeria},
journal = {International Journal of Environmental Monitoring and Analysis},
volume = {5},
number = {2},
pages = {25-31},
doi = {10.11648/j.ijema.20170502.12},
url = {https://doi.org/10.11648/j.ijema.20170502.12},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.ijema.20170502.12},
abstract = {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.},
year = {2017}
}
TY - JOUR T1 - Study on the Effects of Hydraulic Dredging and Disposal Operations on Water Quality of Nworie River, South-Eastern Nigeria AU - Justina Ugochi Udensi AU - Toochukwu Ekwutosi Ogbulie AU - Emeka-Nwabunnia Ijeoma AU - Nkeiruka Uche Chikezie AU - Ugochukwu Mmasi Godson AU - Awurum Ivy Nwaku AU - Ifeyinwa Celestina Mgbemena Y1 - 2017/03/11 PY - 2017 N1 - https://doi.org/10.11648/j.ijema.20170502.12 DO - 10.11648/j.ijema.20170502.12 T2 - International Journal of Environmental Monitoring and Analysis JF - International Journal of Environmental Monitoring and Analysis JO - International Journal of Environmental Monitoring and Analysis SP - 25 EP - 31 PB - Science Publishing Group SN - 2328-7667 UR - https://doi.org/10.11648/j.ijema.20170502.12 AB - 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. VL - 5 IS - 2 ER -
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