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Depth profile of reservoir water quality in the Southwest of Ethiopia
The objective of this research was to investigate the variation of water quality parameters at different depths of the Gilgel Gibe I reservoir in Oromia Jimma zone during wet seasons. Five stations within the reservoir were selected, and water quality parameters were determined at four different dep...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10368769/ https://www.ncbi.nlm.nih.gov/pubmed/37501970 http://dx.doi.org/10.1016/j.heliyon.2023.e17474 |
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author | Woldeab, Bizuneh Ambelu, Argaw Efrem, Zewdu Deribe, Siyoum Megersa, Moa Alemu, Tibebu Mereta, Seid Tiku |
author_facet | Woldeab, Bizuneh Ambelu, Argaw Efrem, Zewdu Deribe, Siyoum Megersa, Moa Alemu, Tibebu Mereta, Seid Tiku |
author_sort | Woldeab, Bizuneh |
collection | PubMed |
description | The objective of this research was to investigate the variation of water quality parameters at different depths of the Gilgel Gibe I reservoir in Oromia Jimma zone during wet seasons. Five stations within the reservoir were selected, and water quality parameters were determined at four different depths (surface, 5 m, 10 m, and 15 m). Water quality parameters were analyzed on-site using a HACH, HQ40d portable multi-meter, and turbidity was measured using Wag tech turbidity meter and in the laboratory using the standard method. Comparison of water quality parameters among depths were conducted using one-way ANOVA and Tukey's pairwise comparisons with 5% significance level. The probable contributing source of the investigated physicochemical water quality parameters at different depth was identified using Principal components analysis. The results show that depth wise except for total suspended solids (TSS), total dissolved solids (TDS), total phosphorus (TP) and soluble reactive phosphorus (SRP) the rest showed statistically significant difference at p < 0.05 level. Negative correlations were found between depth and dissolved oxygen (DO), water temperature, pH, nitrate (N0(3)(-)) and chlorophyll a (Chl.a) while positive correlations were found between electrical conductivity (EC), biochemical oxygen demand (BOD(5)), turbidity and N0(3)(-). The study revealed that the release of nutrients associated with increased concentration of BOD5 at the bottom depth caused low concentration of dissolved oxygen due to oxygen consumption. This was further aggravated through the decomposition of organic matter, indicating organic pollution resulting from runoff from the catchment. The presence of dense masses of blue-green algae in the pelagic zone of Gilgel Gibe I reservoir suggested the presence of ample nutrients for its blooming and significant reduction of water quality, indicating possible eutrophic conditions. Therefore, catchment management is required to protect aquatic life and the reservoir function as a whole from reservoir water quality degradation. |
format | Online Article Text |
id | pubmed-10368769 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-103687692023-07-27 Depth profile of reservoir water quality in the Southwest of Ethiopia Woldeab, Bizuneh Ambelu, Argaw Efrem, Zewdu Deribe, Siyoum Megersa, Moa Alemu, Tibebu Mereta, Seid Tiku Heliyon Research Article The objective of this research was to investigate the variation of water quality parameters at different depths of the Gilgel Gibe I reservoir in Oromia Jimma zone during wet seasons. Five stations within the reservoir were selected, and water quality parameters were determined at four different depths (surface, 5 m, 10 m, and 15 m). Water quality parameters were analyzed on-site using a HACH, HQ40d portable multi-meter, and turbidity was measured using Wag tech turbidity meter and in the laboratory using the standard method. Comparison of water quality parameters among depths were conducted using one-way ANOVA and Tukey's pairwise comparisons with 5% significance level. The probable contributing source of the investigated physicochemical water quality parameters at different depth was identified using Principal components analysis. The results show that depth wise except for total suspended solids (TSS), total dissolved solids (TDS), total phosphorus (TP) and soluble reactive phosphorus (SRP) the rest showed statistically significant difference at p < 0.05 level. Negative correlations were found between depth and dissolved oxygen (DO), water temperature, pH, nitrate (N0(3)(-)) and chlorophyll a (Chl.a) while positive correlations were found between electrical conductivity (EC), biochemical oxygen demand (BOD(5)), turbidity and N0(3)(-). The study revealed that the release of nutrients associated with increased concentration of BOD5 at the bottom depth caused low concentration of dissolved oxygen due to oxygen consumption. This was further aggravated through the decomposition of organic matter, indicating organic pollution resulting from runoff from the catchment. The presence of dense masses of blue-green algae in the pelagic zone of Gilgel Gibe I reservoir suggested the presence of ample nutrients for its blooming and significant reduction of water quality, indicating possible eutrophic conditions. Therefore, catchment management is required to protect aquatic life and the reservoir function as a whole from reservoir water quality degradation. Elsevier 2023-06-24 /pmc/articles/PMC10368769/ /pubmed/37501970 http://dx.doi.org/10.1016/j.heliyon.2023.e17474 Text en © 2023 The Authors https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Research Article Woldeab, Bizuneh Ambelu, Argaw Efrem, Zewdu Deribe, Siyoum Megersa, Moa Alemu, Tibebu Mereta, Seid Tiku Depth profile of reservoir water quality in the Southwest of Ethiopia |
title | Depth profile of reservoir water quality in the Southwest of Ethiopia |
title_full | Depth profile of reservoir water quality in the Southwest of Ethiopia |
title_fullStr | Depth profile of reservoir water quality in the Southwest of Ethiopia |
title_full_unstemmed | Depth profile of reservoir water quality in the Southwest of Ethiopia |
title_short | Depth profile of reservoir water quality in the Southwest of Ethiopia |
title_sort | depth profile of reservoir water quality in the southwest of ethiopia |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10368769/ https://www.ncbi.nlm.nih.gov/pubmed/37501970 http://dx.doi.org/10.1016/j.heliyon.2023.e17474 |
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