Regionalization of water quality parameters based on the landscape characteristics of small ungauged basins
One of the main problems associated with the analysis of water quality parameters (WQPs) in developing countries is the low number of sampling sites in small watersheds. One of the strategies used to solve this problem involves estimating WQPs based on the extrapolation of measurements carried out...
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European Association of Geographers
2022-03-01
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| Series: | European Journal of Geography |
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| Online Access: | https://eurogeojournal.eu/index.php/egj/article/view/261 |
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| author | Danilo Garofalo Marcos Ferreira |
| author_facet | Danilo Garofalo Marcos Ferreira |
| author_sort | Danilo Garofalo |
| collection | DOAJ |
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One of the main problems associated with the analysis of water quality parameters (WQPs) in developing countries is the low number of sampling sites in small watersheds. One of the strategies used to solve this problem involves estimating WQPs based on the extrapolation of measurements carried out in other basins using regionalization methods associated with landscape characteristics. The objectives of this study were to evaluate the associations between landscape characteristics and WQPs and to propose a methodology for the regionalization of WQPs based on landscape characteristic data obtained from basins where WQP data were sampled. The study area was the upper Piracicaba-Jaguari River basin located in south-western Brazil. The methodology was based on a survey of 27 environmental variables and 12 water quality parameters in 44 small sub-basins. The non-parametric k-nearest neighbour regression (K-NNR) algorithm was used to estimate the WQP values for the small sub-basins that lacked data. The results showed that the landscape characteristics of the studied sub-basins related to land use and cover significantly influenced the WQPs. The mapped regions showed significant differences among the total dissolved solids, chloride, electric conductivity, pH, salinity, resistivity, dissolved oxygen, and nitrate parameter values.
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| format | Article |
| id | doaj-art-be1bd48778914affa093687d5a2e3b0a |
| institution | Kabale University |
| issn | 1792-1341 2410-7433 |
| language | English |
| publishDate | 2022-03-01 |
| publisher | European Association of Geographers |
| record_format | Article |
| series | European Journal of Geography |
| spelling | doaj-art-be1bd48778914affa093687d5a2e3b0a2025-01-06T06:59:08ZengEuropean Association of GeographersEuropean Journal of Geography1792-13412410-74332022-03-0113110.48088/ejg.d.gar.13.1.47.68Regionalization of water quality parameters based on the landscape characteristics of small ungauged basinsDanilo Garofalo0Marcos Ferreira1Embrapa Environment, Brazil Institute of Geosciences, UNICAMP, Brazil One of the main problems associated with the analysis of water quality parameters (WQPs) in developing countries is the low number of sampling sites in small watersheds. One of the strategies used to solve this problem involves estimating WQPs based on the extrapolation of measurements carried out in other basins using regionalization methods associated with landscape characteristics. The objectives of this study were to evaluate the associations between landscape characteristics and WQPs and to propose a methodology for the regionalization of WQPs based on landscape characteristic data obtained from basins where WQP data were sampled. The study area was the upper Piracicaba-Jaguari River basin located in south-western Brazil. The methodology was based on a survey of 27 environmental variables and 12 water quality parameters in 44 small sub-basins. The non-parametric k-nearest neighbour regression (K-NNR) algorithm was used to estimate the WQP values for the small sub-basins that lacked data. The results showed that the landscape characteristics of the studied sub-basins related to land use and cover significantly influenced the WQPs. The mapped regions showed significant differences among the total dissolved solids, chloride, electric conductivity, pH, salinity, resistivity, dissolved oxygen, and nitrate parameter values. https://eurogeojournal.eu/index.php/egj/article/view/261Water quality parametersLandscape characteristicsRegionalizationSmall ungagged basinsBrazilSpatial Analysis |
| spellingShingle | Danilo Garofalo Marcos Ferreira Regionalization of water quality parameters based on the landscape characteristics of small ungauged basins European Journal of Geography Water quality parameters Landscape characteristics Regionalization Small ungagged basins Brazil Spatial Analysis |
| title | Regionalization of water quality parameters based on the landscape characteristics of small ungauged basins |
| title_full | Regionalization of water quality parameters based on the landscape characteristics of small ungauged basins |
| title_fullStr | Regionalization of water quality parameters based on the landscape characteristics of small ungauged basins |
| title_full_unstemmed | Regionalization of water quality parameters based on the landscape characteristics of small ungauged basins |
| title_short | Regionalization of water quality parameters based on the landscape characteristics of small ungauged basins |
| title_sort | regionalization of water quality parameters based on the landscape characteristics of small ungauged basins |
| topic | Water quality parameters Landscape characteristics Regionalization Small ungagged basins Brazil Spatial Analysis |
| url | https://eurogeojournal.eu/index.php/egj/article/view/261 |
| work_keys_str_mv | AT danilogarofalo regionalizationofwaterqualityparametersbasedonthelandscapecharacteristicsofsmallungaugedbasins AT marcosferreira regionalizationofwaterqualityparametersbasedonthelandscapecharacteristicsofsmallungaugedbasins |