The consequences for stream water quality of long-term changes in landscape patterns: Implications for land use management and policies

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dc.contributor.authorFernandes, António Carlos Pinheiropt_PT
dc.contributor.authorde Oliveira Martins, Lisa Mariapt_PT
dc.contributor.authorPacheco, Fernando António Lealpt_PT
dc.contributor.authorFernandes, Luís Filipe Sanchespt_PT
dc.date.accessioned2021-12-09T16:24:13Z
dc.date.available2021-12-09T16:24:13Z
dc.date.issued2021-08-07
dc.description.abstractThe preservation of water resources is a worldwide goal that requires continuous research to support the action of decision-makers. The learning about water quality is paramount in that regard to assess the complex interactions between surface waters and pollution sources. To assess the impact of diffuse pressures, many authors established nexus between landscape metrics and surface water quality. The present study used that approach in a Portuguese urban catchment, the Ave River Basin. The relation between landscape metrics and eight surface water quality parameters was studied during 26 hydrological years, based on the Spearman’s rank correlation analysis. The correlation analysis exposed strong relationships between water quality and parameters that describe land use composition or configuration. During the studied period, even in recent years, the water quality parameters reached concentrations above the legally recommended limits. The most concerning parameters were ammoniacal nitrogen, chemical oxygen demand and total orthophosphate. Among the analysed metrics, Shannon’s diversity index, percentage of urban areas, and the percentage of agricultural edges that are shared with artificial areas were the most preoccupying land use characteristics that indicate degradation of water resources. Besides the correlations, the study calculated the variation rates of land use maps relative to the years of 1995, 2007, 2010, 2015 and 2018. The results of correlation analysis and land use changes identified actions for the short-term that could improve water quality in the Ave River, namely a reduction in agricultural fields and an increase of forest edges density. In the long-term, water quality improvements could be accomplished through the decrease of artificial surfaces, the increase of forested areas and edges surrounding agricultural fields.pt_PT
dc.identifier.otherhttps://doi.org/10.1016/j.landusepol.2021.105679
dc.identifier.urihttp://hdl.handle.net/10348/10858
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relation.ispartofCQ - Centro de Químicapt_PT
dc.rightsopen accesspt_PT
dc.subjectlandscape metricspt_PT
dc.subjectWater qualitypt_PT
dc.titleThe consequences for stream water quality of long-term changes in landscape patterns: Implications for land use management and policiespt_PT
dc.typejournal articlept_PT
degois.publication.titleLand Use Policypt_PT
dspace.entity.typePublicationen
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