River geometry responses resulting from hydrological changes in a partially urbanized watershed: an experimental study in Southern Brazil
: Impervious surfaces resulting from urbanization can increase peak flow magnitudes and affect the physical integrity of rivers, leading to alterations in channel morphometric parameters. This study investigates the relationship between cross-sectional morphometry and both drainage area size and th...
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| Format: | Article |
| Language: | English |
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União da Geomorfologia Brasileira
2025-07-01
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| Series: | Revista Brasileira de Geomorfologia |
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| Online Access: | https://rbgeomorfologia.org.br/rbg/article/view/2643 |
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| author | Otávio Cristiano Montanher Eduardo Souza de Morais Bruna Caroline da Silva de Matos |
| author_facet | Otávio Cristiano Montanher Eduardo Souza de Morais Bruna Caroline da Silva de Matos |
| author_sort | Otávio Cristiano Montanher |
| collection | DOAJ |
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: Impervious surfaces resulting from urbanization can increase peak flow magnitudes and affect the physical integrity of rivers, leading to alterations in channel morphometric parameters. This study investigates the relationship between cross-sectional morphometry and both drainage area size and the proportion of impervious surfaces. Ten cross-sections were analyzed within the Maringá Stream watershed, located in southern Brazil. This watershed, the largest in the municipality of Maringá (~90 km²), encompasses both urban and rural drainage areas. Morphometric parameters were obtained through field surveys, and geoprocessing techniques were employed to quantify drainage area size and impervious surface ratio. Significant univariate relationships were identified only between the width-to-depth ratio and depth, respectively, with drainage area size and impervious surface ratio. Multiple regression analysis demonstrated that width, channel capacity, and hydraulic radius had statistically significant coefficients with both explanatory variables. The findings suggest that the impervious surface ratio strongly influences fluvial morphometry, although hydraulic geometry is primarily governed by the combined effects of urbanization and drainage area size.
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| format | Article |
| id | doaj-art-ccc871fdb9134cf38a8e71d50b7385a9 |
| institution | Kabale University |
| issn | 1519-1540 2236-5664 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | União da Geomorfologia Brasileira |
| record_format | Article |
| series | Revista Brasileira de Geomorfologia |
| spelling | doaj-art-ccc871fdb9134cf38a8e71d50b7385a92025-08-20T03:28:13ZengUnião da Geomorfologia BrasileiraRevista Brasileira de Geomorfologia1519-15402236-56642025-07-0126310.20502/rbg.v26i3.2643River geometry responses resulting from hydrological changes in a partially urbanized watershed: an experimental study in Southern Brazil Otávio Cristiano Montanher0https://orcid.org/0000-0002-1103-6995Eduardo Souza de Morais1https://orcid.org/0000-0003-0738-5532Bruna Caroline da Silva de Matos2https://orcid.org/0009-0007-8754-2716Departamento de Geografia, Universidade Estadual de Maringá.Grupo de Estudos Multidisciplinares do Ambiente, Departamento de Geografia, Universidade Estadual de Maringá.Grupo de Estudos Multidisciplinares do Ambiente, Pós graduanda em Engenharia Urbana, Universidade Estadual de Maringá. : Impervious surfaces resulting from urbanization can increase peak flow magnitudes and affect the physical integrity of rivers, leading to alterations in channel morphometric parameters. This study investigates the relationship between cross-sectional morphometry and both drainage area size and the proportion of impervious surfaces. Ten cross-sections were analyzed within the Maringá Stream watershed, located in southern Brazil. This watershed, the largest in the municipality of Maringá (~90 km²), encompasses both urban and rural drainage areas. Morphometric parameters were obtained through field surveys, and geoprocessing techniques were employed to quantify drainage area size and impervious surface ratio. Significant univariate relationships were identified only between the width-to-depth ratio and depth, respectively, with drainage area size and impervious surface ratio. Multiple regression analysis demonstrated that width, channel capacity, and hydraulic radius had statistically significant coefficients with both explanatory variables. The findings suggest that the impervious surface ratio strongly influences fluvial morphometry, although hydraulic geometry is primarily governed by the combined effects of urbanization and drainage area size. https://rbgeomorfologia.org.br/rbg/article/view/2643Fluvial morphometryUrban riversImperviousHydraulic geometry |
| spellingShingle | Otávio Cristiano Montanher Eduardo Souza de Morais Bruna Caroline da Silva de Matos River geometry responses resulting from hydrological changes in a partially urbanized watershed: an experimental study in Southern Brazil Revista Brasileira de Geomorfologia Fluvial morphometry Urban rivers Impervious Hydraulic geometry |
| title | River geometry responses resulting from hydrological changes in a partially urbanized watershed: an experimental study in Southern Brazil |
| title_full | River geometry responses resulting from hydrological changes in a partially urbanized watershed: an experimental study in Southern Brazil |
| title_fullStr | River geometry responses resulting from hydrological changes in a partially urbanized watershed: an experimental study in Southern Brazil |
| title_full_unstemmed | River geometry responses resulting from hydrological changes in a partially urbanized watershed: an experimental study in Southern Brazil |
| title_short | River geometry responses resulting from hydrological changes in a partially urbanized watershed: an experimental study in Southern Brazil |
| title_sort | river geometry responses resulting from hydrological changes in a partially urbanized watershed an experimental study in southern brazil |
| topic | Fluvial morphometry Urban rivers Impervious Hydraulic geometry |
| url | https://rbgeomorfologia.org.br/rbg/article/view/2643 |
| work_keys_str_mv | AT otaviocristianomontanher rivergeometryresponsesresultingfromhydrologicalchangesinapartiallyurbanizedwatershedanexperimentalstudyinsouthernbrazil AT eduardosouzademorais rivergeometryresponsesresultingfromhydrologicalchangesinapartiallyurbanizedwatershedanexperimentalstudyinsouthernbrazil AT brunacarolinedasilvadematos rivergeometryresponsesresultingfromhydrologicalchangesinapartiallyurbanizedwatershedanexperimentalstudyinsouthernbrazil |