Effects of land use and land cover on water quality of low-order streams in Southeastern Brazil: Watershed versus riparian zone
| Autor: | Carlos Alberto Vettorazzi, André Cordeiro Alves dos Santos, Roberta Averna Valente, Kaline de Mello, Timothy O. Randhir |
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| Rok vydání: | 2018 |
| Předmět: |
Hydrology
geography Watershed geography.geographical_feature_category 010504 meteorology & atmospheric sciences Land use Sediment STREAMS Land cover 010501 environmental sciences 01 natural sciences Streamflow Environmental science Water quality 0105 earth and related environmental sciences Earth-Surface Processes Riparian zone |
| Zdroj: | CATENA. 167:130-138 |
| ISSN: | 0341-8162 |
| DOI: | 10.1016/j.catena.2018.04.027 |
| Popis: | Land-use/land-cover (LULC) pattern influences water quality, however, this relation may be different for various spatial scales. We evaluated the LULC effects on water quality of tropical low-order streams, comparing watershed and riparian zone models. Water quality parameters were analyzed separately and together using linear mixed and multivariate models. The results indicate that the forest cover plays a significant role in keeping water clean, while agriculture and urban areas lead to water quality degradation. Pasture land had mixed effects, but in general was not correlated with poor water quality. Dissolved oxygen, phosphorus, sediment, and fecal coliforms were influenced by LULC pattern at the watershed scale, while nitrogen and organic matter were more affected by the riparian zone composition. The water quality also varies with seasonal changes in streamflow and temperature. The overall water quality variation is explained better by the LULC composition within the watershed than in the riparian zone. |
| Databáze: | OpenAIRE |
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