Limnological dynamics in an artificial reservoir and intermittent river in the semi-arid region as a function of land use and occupation
ABSTRACT Remote sensing coupled with the measurement of physical, chemical and biological variables is an important tool in water resource management. The aim of this study, therefore, was to evaluate the dynamics of the physical, chemical and biological variables of the waters of an intermittent ri...
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| Format: | Article |
| Language: | English |
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Universidade Federal do Ceará
2021-06-01
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| Series: | Revista Ciência Agronômica |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902021000100410&tlng=en |
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| author | Maria Rita Nascimento Duarte Tamara Maciel Pereira Paulo de Freitas Lima Erich Celestino Braga Pereira Fernando Bezerra Lopes Carla Ferreira Rezende |
| author_facet | Maria Rita Nascimento Duarte Tamara Maciel Pereira Paulo de Freitas Lima Erich Celestino Braga Pereira Fernando Bezerra Lopes Carla Ferreira Rezende |
| author_sort | Maria Rita Nascimento Duarte |
| collection | DOAJ |
| description | ABSTRACT Remote sensing coupled with the measurement of physical, chemical and biological variables is an important tool in water resource management. The aim of this study, therefore, was to evaluate the dynamics of the physical, chemical and biological variables of the waters of an intermittent river and an artificial surface reservoir using multivariate analysis and in response to land use and occupation in the hydrographic basin. The study was carried out in the hydrographic basin of the River Cruxati in four study areas (three river areas and one artificial reservoir), with images obtained from the OLI sensor of the Landsat-8 satellite. The limnological variables measured were pH, electrical conductivity, dissolved oxygen, turbidity, nutrients (total nitrogen and total phosphorus) and chlorophyll a. The limnological variables were analysed using Principal Component Analysis - PCA, Tukey's test and Cluster Analysis. Eutrophication of the areas under study was calculated using the Trophic State Index. The PCA allowed three components to be selected that indicated the quality of the surface water, river and artificial reservoir, explaining 88.57% of the total variance. The limnological variables responsible for the grouping were electrical conductivity, dissolved oxygen and turbidity. Land use and occupation has influenced water quality in the stretches of river. Anthropisation has had an influence on the levels of dissolved oxygen, and the presence of agricultural areas has caused an increase in turbidity. However, the most conserved landscape (artificial reservoir) had the highest degree of eutrophication due to the difference in water dynamics between the lentic and lotic environments. |
| first_indexed | 2024-12-19T17:29:49Z |
| format | Article |
| id | doaj.art-0cf364ce7985426fb75dae41d7b48aa4 |
| institution | Directory Open Access Journal |
| issn | 1806-6690 |
| language | English |
| last_indexed | 2024-12-19T17:29:49Z |
| publishDate | 2021-06-01 |
| publisher | Universidade Federal do Ceará |
| record_format | Article |
| series | Revista Ciência Agronômica |
| spelling | doaj.art-0cf364ce7985426fb75dae41d7b48aa42022-12-21T20:12:28ZengUniversidade Federal do CearáRevista Ciência Agronômica1806-66902021-06-0152110.5935/1806-6690.20210010Limnological dynamics in an artificial reservoir and intermittent river in the semi-arid region as a function of land use and occupationMaria Rita Nascimento Duartehttps://orcid.org/0000-0003-1472-3683Tamara Maciel Pereirahttps://orcid.org/0000-0003-1132-226XPaulo de Freitas Limahttps://orcid.org/0000-0002-6287-9730Erich Celestino Braga Pereirahttps://orcid.org/0000-0002-6599-1779Fernando Bezerra Lopeshttps://orcid.org/0000-0001-8285-2925Carla Ferreira Rezendehttps://orcid.org/0000-0002-2319-6558ABSTRACT Remote sensing coupled with the measurement of physical, chemical and biological variables is an important tool in water resource management. The aim of this study, therefore, was to evaluate the dynamics of the physical, chemical and biological variables of the waters of an intermittent river and an artificial surface reservoir using multivariate analysis and in response to land use and occupation in the hydrographic basin. The study was carried out in the hydrographic basin of the River Cruxati in four study areas (three river areas and one artificial reservoir), with images obtained from the OLI sensor of the Landsat-8 satellite. The limnological variables measured were pH, electrical conductivity, dissolved oxygen, turbidity, nutrients (total nitrogen and total phosphorus) and chlorophyll a. The limnological variables were analysed using Principal Component Analysis - PCA, Tukey's test and Cluster Analysis. Eutrophication of the areas under study was calculated using the Trophic State Index. The PCA allowed three components to be selected that indicated the quality of the surface water, river and artificial reservoir, explaining 88.57% of the total variance. The limnological variables responsible for the grouping were electrical conductivity, dissolved oxygen and turbidity. Land use and occupation has influenced water quality in the stretches of river. Anthropisation has had an influence on the levels of dissolved oxygen, and the presence of agricultural areas has caused an increase in turbidity. However, the most conserved landscape (artificial reservoir) had the highest degree of eutrophication due to the difference in water dynamics between the lentic and lotic environments.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902021000100410&tlng=enWater qualityEutrophicationRemote sensingMultivariate statistical analysis |
| spellingShingle | Maria Rita Nascimento Duarte Tamara Maciel Pereira Paulo de Freitas Lima Erich Celestino Braga Pereira Fernando Bezerra Lopes Carla Ferreira Rezende Limnological dynamics in an artificial reservoir and intermittent river in the semi-arid region as a function of land use and occupation Revista Ciência Agronômica Water quality Eutrophication Remote sensing Multivariate statistical analysis |
| title | Limnological dynamics in an artificial reservoir and intermittent river in the semi-arid region as a function of land use and occupation |
| title_full | Limnological dynamics in an artificial reservoir and intermittent river in the semi-arid region as a function of land use and occupation |
| title_fullStr | Limnological dynamics in an artificial reservoir and intermittent river in the semi-arid region as a function of land use and occupation |
| title_full_unstemmed | Limnological dynamics in an artificial reservoir and intermittent river in the semi-arid region as a function of land use and occupation |
| title_short | Limnological dynamics in an artificial reservoir and intermittent river in the semi-arid region as a function of land use and occupation |
| title_sort | limnological dynamics in an artificial reservoir and intermittent river in the semi arid region as a function of land use and occupation |
| topic | Water quality Eutrophication Remote sensing Multivariate statistical analysis |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902021000100410&tlng=en |
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