The study of the rainfall-runoff relation on annual and monthly scales is based on the hydrological data measured in various stations of the Kouilou-Niari basin. The parameters of the rainfall-runoff modeling were obtained with satisfaction by today’s standards of quality. The objective of this study is to evaluate the impacts of the climate changes on the water resources of the catchment area of Kouilou-Niari using hydrological modeling. With this intention, a sample of twelvestations was selected on a hydrological cycle of more than thirty years (1952-1982). The results obtained show that the variations of the flows follow those of precipitation: reduction in N’douo zone and Niarizone and increase in Kouilou zone. These stations present a bimodal mode, with a double maximum during the rainyseasons (MAM and OND). Season (MAM) is themost rainy and season (JJAS) is the least rainy in all the stations. The relation between rainfalls and runoffs is satisfactory, because the hydrological mode models itselfonprecipitation one. The flows of the basin are rising, with anaveragestreamflow of 445 m3/sincluded between a minimum of 86.2 m3/s and a maximum of 930.4 m3/s for respective specific modules of 16.91 and 23.73 l.s-1/km2. The return periods of the floods are estimated of 5, 10 and 50 years for respective streamflows of 2470, 2620 and 2682 m3/s. This particular behavior of the basin finds its reasons not only in the pluviometric mode but also in the physical characteristics (relief, geologyand pedology). The Kecoefficient of flow is 42.9% and the seasonal variation K3 is 13.3 atSounda station.
| Published in | Journal of Water Resources and Ocean Science (Volume 7, Issue 3) |
| DOI | 10.11648/j.wros.20180703.12 |
| Page(s) | 28-41 |
| 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), 2018. Published by Science Publishing Group |
Kouilou-Niari Basin, Climate Change, Hydrological Network, Hydrological Data
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APA Style
Christian Ngoma Mvoundou, Christian Tathy, Dominique Nkounkou Tomodiatounga, Raymond Gentil Elenga, Guy Moukandi Nkaya, et al. (2018). Evaluation of the Impacts of the Climate Changes on the Hydrological Network of the Kouilou-Niari Basin in the South-West of Congo Brazzaville. Journal of Water Resources and Ocean Science, 7(3), 28-41. https://doi.org/10.11648/j.wros.20180703.12
ACS Style
Christian Ngoma Mvoundou; Christian Tathy; Dominique Nkounkou Tomodiatounga; Raymond Gentil Elenga; Guy Moukandi Nkaya, et al. Evaluation of the Impacts of the Climate Changes on the Hydrological Network of the Kouilou-Niari Basin in the South-West of Congo Brazzaville. J. Water Resour. Ocean Sci. 2018, 7(3), 28-41. doi: 10.11648/j.wros.20180703.12
AMA Style
Christian Ngoma Mvoundou, Christian Tathy, Dominique Nkounkou Tomodiatounga, Raymond Gentil Elenga, Guy Moukandi Nkaya, et al. Evaluation of the Impacts of the Climate Changes on the Hydrological Network of the Kouilou-Niari Basin in the South-West of Congo Brazzaville. J Water Resour Ocean Sci. 2018;7(3):28-41. doi: 10.11648/j.wros.20180703.12
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Download@article{10.11648/j.wros.20180703.12,
author = {Christian Ngoma Mvoundou and Christian Tathy and Dominique Nkounkou Tomodiatounga and Raymond Gentil Elenga and Guy Moukandi Nkaya and Bernard Mabiala},
title = {Evaluation of the Impacts of the Climate Changes on the Hydrological Network of the Kouilou-Niari Basin in the South-West of Congo Brazzaville},
journal = {Journal of Water Resources and Ocean Science},
volume = {7},
number = {3},
pages = {28-41},
doi = {10.11648/j.wros.20180703.12},
url = {https://doi.org/10.11648/j.wros.20180703.12},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.wros.20180703.12},
abstract = {The study of the rainfall-runoff relation on annual and monthly scales is based on the hydrological data measured in various stations of the Kouilou-Niari basin. The parameters of the rainfall-runoff modeling were obtained with satisfaction by today’s standards of quality. The objective of this study is to evaluate the impacts of the climate changes on the water resources of the catchment area of Kouilou-Niari using hydrological modeling. With this intention, a sample of twelvestations was selected on a hydrological cycle of more than thirty years (1952-1982). The results obtained show that the variations of the flows follow those of precipitation: reduction in N’douo zone and Niarizone and increase in Kouilou zone. These stations present a bimodal mode, with a double maximum during the rainyseasons (MAM and OND). Season (MAM) is themost rainy and season (JJAS) is the least rainy in all the stations. The relation between rainfalls and runoffs is satisfactory, because the hydrological mode models itselfonprecipitation one. The flows of the basin are rising, with anaveragestreamflow of 445 m3/sincluded between a minimum of 86.2 m3/s and a maximum of 930.4 m3/s for respective specific modules of 16.91 and 23.73 l.s-1/km2. The return periods of the floods are estimated of 5, 10 and 50 years for respective streamflows of 2470, 2620 and 2682 m3/s. This particular behavior of the basin finds its reasons not only in the pluviometric mode but also in the physical characteristics (relief, geologyand pedology). The Kecoefficient of flow is 42.9% and the seasonal variation K3 is 13.3 atSounda station.},
year = {2018}
}
TY - JOUR T1 - Evaluation of the Impacts of the Climate Changes on the Hydrological Network of the Kouilou-Niari Basin in the South-West of Congo Brazzaville AU - Christian Ngoma Mvoundou AU - Christian Tathy AU - Dominique Nkounkou Tomodiatounga AU - Raymond Gentil Elenga AU - Guy Moukandi Nkaya AU - Bernard Mabiala Y1 - 2018/08/22 PY - 2018 N1 - https://doi.org/10.11648/j.wros.20180703.12 DO - 10.11648/j.wros.20180703.12 T2 - Journal of Water Resources and Ocean Science JF - Journal of Water Resources and Ocean Science JO - Journal of Water Resources and Ocean Science SP - 28 EP - 41 PB - Science Publishing Group SN - 2328-7993 UR - https://doi.org/10.11648/j.wros.20180703.12 AB - The study of the rainfall-runoff relation on annual and monthly scales is based on the hydrological data measured in various stations of the Kouilou-Niari basin. The parameters of the rainfall-runoff modeling were obtained with satisfaction by today’s standards of quality. The objective of this study is to evaluate the impacts of the climate changes on the water resources of the catchment area of Kouilou-Niari using hydrological modeling. With this intention, a sample of twelvestations was selected on a hydrological cycle of more than thirty years (1952-1982). The results obtained show that the variations of the flows follow those of precipitation: reduction in N’douo zone and Niarizone and increase in Kouilou zone. These stations present a bimodal mode, with a double maximum during the rainyseasons (MAM and OND). Season (MAM) is themost rainy and season (JJAS) is the least rainy in all the stations. The relation between rainfalls and runoffs is satisfactory, because the hydrological mode models itselfonprecipitation one. The flows of the basin are rising, with anaveragestreamflow of 445 m3/sincluded between a minimum of 86.2 m3/s and a maximum of 930.4 m3/s for respective specific modules of 16.91 and 23.73 l.s-1/km2. The return periods of the floods are estimated of 5, 10 and 50 years for respective streamflows of 2470, 2620 and 2682 m3/s. This particular behavior of the basin finds its reasons not only in the pluviometric mode but also in the physical characteristics (relief, geologyand pedology). The Kecoefficient of flow is 42.9% and the seasonal variation K3 is 13.3 atSounda station. VL - 7 IS - 3 ER -
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