Trend in hydrological series and land use changes in a tropical basin at Northeast Brazil
Flow is one of the hydrological variables of greatest interest due to its connection with water availability and its multiple uses. However, in recent years this resource has been threatened by intense land use and climate change, affecting patterns previously considered to be stationary. The goal o...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Associação Brasileira de Engenharia Sanitária e Ambiental
2022-03-01
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| Series: | Revista Brasileira de Ciências Ambientais |
| Subjects: | |
| Online Access: | http://rbciamb.com.br/index.php/Publicacoes_RBCIAMB/article/view/1097 |
| _version_ | 1828852414740955136 |
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| author | Lorena Souza da Silva Lorena Lima Ferraz Lucas Farias de Sousa Carlos Amilton Silva Santos Felizardo Adenilson Rocha |
| author_facet | Lorena Souza da Silva Lorena Lima Ferraz Lucas Farias de Sousa Carlos Amilton Silva Santos Felizardo Adenilson Rocha |
| author_sort | Lorena Souza da Silva |
| collection | DOAJ |
| description | Flow is one of the hydrological variables of greatest interest due to its connection with water availability and its multiple uses. However, in recent years this resource has been threatened by intense land use and climate change, affecting patterns previously considered to be stationary. The goal of this study was to evaluate trends in changes of patterns of flow, precipitation, and land use in a basin located in the Brazilian Cerrado. 33 years of rainfall, fluviometric, and land use data were used, covering the period of 1985 to 2018 on an annual scale. Mann-Kendall and Sen Slope’s nonparametric test was applied to evaluate the trends in temporal series, as well as the Spearman Rho and Pettit, which were used to analyze the correlations between variables and detect the point of change in the series, respectively. The results show statistically significant trends in flow reduction over time. At the same time, a considerable reduction in natural areas occurred, with an increase of +750% in agricultural areas. The results also show that although a tendency to reduce precipitation was detected, its magnitude was not significant, with land use changes being the main factor for the negative changes in the flow of the Rio Grande tributary. |
| first_indexed | 2024-12-12T23:52:32Z |
| format | Article |
| id | doaj.art-76e399c028604559858712b202b803b7 |
| institution | Directory Open Access Journal |
| issn | 1808-4524 2176-9478 |
| language | English |
| last_indexed | 2024-12-12T23:52:32Z |
| publishDate | 2022-03-01 |
| publisher | Associação Brasileira de Engenharia Sanitária e Ambiental |
| record_format | Article |
| series | Revista Brasileira de Ciências Ambientais |
| spelling | doaj.art-76e399c028604559858712b202b803b72022-12-22T00:06:39ZengAssociação Brasileira de Engenharia Sanitária e AmbientalRevista Brasileira de Ciências Ambientais1808-45242176-94782022-03-0157113714710.5327/Z2176-947810971097Trend in hydrological series and land use changes in a tropical basin at Northeast BrazilLorena Souza da Silva0Lorena Lima Ferraz1Lucas Farias de Sousa2Carlos Amilton Silva Santos3Felizardo Adenilson Rocha4Universidade Estadual do Sudoeste da BahiaUniversidade Estadual de Santa CruzUniversidade Estadual de Santa CruzInstituto Federal da BahiaInstituto Federal da BahiaFlow is one of the hydrological variables of greatest interest due to its connection with water availability and its multiple uses. However, in recent years this resource has been threatened by intense land use and climate change, affecting patterns previously considered to be stationary. The goal of this study was to evaluate trends in changes of patterns of flow, precipitation, and land use in a basin located in the Brazilian Cerrado. 33 years of rainfall, fluviometric, and land use data were used, covering the period of 1985 to 2018 on an annual scale. Mann-Kendall and Sen Slope’s nonparametric test was applied to evaluate the trends in temporal series, as well as the Spearman Rho and Pettit, which were used to analyze the correlations between variables and detect the point of change in the series, respectively. The results show statistically significant trends in flow reduction over time. At the same time, a considerable reduction in natural areas occurred, with an increase of +750% in agricultural areas. The results also show that although a tendency to reduce precipitation was detected, its magnitude was not significant, with land use changes being the main factor for the negative changes in the flow of the Rio Grande tributary.http://rbciamb.com.br/index.php/Publicacoes_RBCIAMB/article/view/1097estacionariedade; vazão; testes não paramétricos; rio rio grande. |
| spellingShingle | Lorena Souza da Silva Lorena Lima Ferraz Lucas Farias de Sousa Carlos Amilton Silva Santos Felizardo Adenilson Rocha Trend in hydrological series and land use changes in a tropical basin at Northeast Brazil Revista Brasileira de Ciências Ambientais estacionariedade; vazão; testes não paramétricos; rio rio grande. |
| title | Trend in hydrological series and land use changes in a tropical basin at Northeast Brazil |
| title_full | Trend in hydrological series and land use changes in a tropical basin at Northeast Brazil |
| title_fullStr | Trend in hydrological series and land use changes in a tropical basin at Northeast Brazil |
| title_full_unstemmed | Trend in hydrological series and land use changes in a tropical basin at Northeast Brazil |
| title_short | Trend in hydrological series and land use changes in a tropical basin at Northeast Brazil |
| title_sort | trend in hydrological series and land use changes in a tropical basin at northeast brazil |
| topic | estacionariedade; vazão; testes não paramétricos; rio rio grande. |
| url | http://rbciamb.com.br/index.php/Publicacoes_RBCIAMB/article/view/1097 |
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