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Open AccessArticle

Land-Cover Patterns and Hydrogeomorphology of Tributaries: Are These Important Stressors for the Water Quality of Reservoirs in the Mediterranean Region?

1
Department of Technologies and Applied Sciences, Polytechnic Institute of Beja, 7801-295 Beja, Portugal
2
ICT, Institute of Earth Sciences, University of Évora, Rua Romão Ramalho 59, 7000-671 Évora, Portugal
3
Renewable Energies, University of Évora, Casa Cordovil, Rua D. Augusto Eduardo Nunes n 7, Évora, 7000-651, Portugal
4
Science and Technology School, University of Évora, 7000-671 Évora, Portugal
5
Linking Landscape, Environment, Agriculture, and Food Research Unit (LEAF), Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017 Lisboa, Portugal
*
Author to whom correspondence should be addressed.
Water 2020, 12(10), 2665; https://doi.org/10.3390/w12102665
Received: 10 September 2020 / Accepted: 21 September 2020 / Published: 23 September 2020
Four streams in the Guadiana watershed were followed up to assess hydrogeomorphological and physicochemical characteristics, and to analyze its correlation with land use/land cover (LULC), analyzing their possible influence in reservoir water quality and possible influence in the reservoir water quality. The highest amounts of organic descriptors and nutrients were quantified in streams with the major percentage of olive groves and vineyards and urban land cover classes. Streams more influenced by agro-silvo-pastoral class presented better water quality, as this type of LULC acts as a buffer of the contamination runoff. The results highlighted that the hydrogeomorphology of the streams may influence the transfer of pollutants loads to reservoirs. Hence, in intermittent streams characterized by coarse particles in the sediment, high amounts of pollutants are accumulated when the flow ceases, and are further transported to the reservoirs when the flow retakes. On the contrary, streams with sediments characterized by a great percentage of fine particles and organic matter do not induce so much stress in reservoirs, since these allow the adsorption of nutrients and trace elements, without their transfer to reservoirs. View Full-Text
Keywords: flow regime; hydrogeomorphology; water quality assessment; land use/land cover (LULC); Guadiana watershed flow regime; hydrogeomorphology; water quality assessment; land use/land cover (LULC); Guadiana watershed
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MDPI and ACS Style

Palma, P.; Fialho, S.; Lima, A.; Mourinha, C.; Penha, A.; Novais, M.H.; Rosado, A.; Morais, M.; Potes, M.; Costa, M.J.; Alvarenga, P. Land-Cover Patterns and Hydrogeomorphology of Tributaries: Are These Important Stressors for the Water Quality of Reservoirs in the Mediterranean Region? Water 2020, 12, 2665. https://doi.org/10.3390/w12102665

AMA Style

Palma P, Fialho S, Lima A, Mourinha C, Penha A, Novais MH, Rosado A, Morais M, Potes M, Costa MJ, Alvarenga P. Land-Cover Patterns and Hydrogeomorphology of Tributaries: Are These Important Stressors for the Water Quality of Reservoirs in the Mediterranean Region? Water. 2020; 12(10):2665. https://doi.org/10.3390/w12102665

Chicago/Turabian Style

Palma, Patrícia; Fialho, Sofia; Lima, Ana; Mourinha, Clarisse; Penha, Alexandra; Novais, Maria H.; Rosado, Anabela; Morais, Manuela; Potes, Miguel; Costa, Maria J.; Alvarenga, Paula. 2020. "Land-Cover Patterns and Hydrogeomorphology of Tributaries: Are These Important Stressors for the Water Quality of Reservoirs in the Mediterranean Region?" Water 12, no. 10: 2665. https://doi.org/10.3390/w12102665

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