caa a22 4500 467901945 CHVBK 20180406152820.0 cr unu---uuuuu 170328e20061201xx s 000 0 eng 10.1007/s10661-005-9114-4 doi (NATIONALLICENCE)springer-10.1007/s10661-005-9114-4 Spatial Patterns of Water Quality in the Cuiabá River Basin, Central Brazil [Elektronische Daten] [Peter Zeilhofer, Eliana Lima, Gilson Lima] This study evaluates the spatial patterns of land occupation and their relationship to water quality in the Cuiabá River watershed, one of the main affluents of the Pantanal floodplain. The impact of farming and other land occupation forms were studied using a three year time series. Monitoring included 15 parameters at 21 stations with a total of 1266 different samples. Ten stations along the Cuiabá River were ordinated by Principal Component Analysis (PCA). For an exploratory analysis in the spatial domain, sub-basins of the Cuiabá watershed were classified according to mean concentrations of selected water quality parameters. Supervised classification of digital Landsat ETM imagery and standard GIS techniques were applied to parameterize land use and occupation according to a watershed scale. Redundancy Analysis (RDA) was then used to evaluate impacts of environmental and socio-economic factors on water quality. A Cuiabá headwater station only shows slightly elevated total coliform counts and concentrations of nutrients in the river after it passes regions of extensive cattle farming. After the confluence with the Manso River, nutrient and COD concentrations increase significantly, receiving loads from sub-basins under intensive agricultural land use, with mean annual concentrations up to 1.74 mg/L of total nitrogen (Kjedahl). Sub-watersheds with intensive fishing culture activities were shown to have significant impact on nitrogen concentrations, reaching mean concentrations of 2.66 mg/L of total nitrogen in the affluents. Most serious biological and chemical water pollution can be observed at stream outlets in the urban agglomeration of Cuiabá/Várzea Grande. Affluent pollution is reflected in the water quality of the Cuiabá River: subsequent monitoring stations in the urban area are ordinated on a gradient of increasing degradation of chemical and biological water quality. The auto-depuration capacity of the Cuiabá River is intact, but elevated concentrations of Phosphorous and Chemical Oxygen Demand can be observed as far away as the Pantanal floodplain, about 120 km downstream from the urban agglomeration. Springer Science+Business Media, Inc., 2005 Brazil nationallicence GIS nationallicence redundancy analysis nationallicence spatial pattern nationallicence water quality nationallicence Zeilhofer Peter Departamento de Geografia, Universidade Federal de Mato Grosso, Av. Fernando Correa da Costa s/n, 78060-900, Cuiabá, MT, Brazil aut Lima Eliana Departamento de Engenharia Sanitária e Ambiental, Universidade Federal de Mato Grosso, Av Fernando Correa da Costa s/n, 78060-900, Cuiabá, MT, Brazil aut Lima Gilson Departamento de Engenharia Sanitária e Ambiental, Universidade Federal de Mato Grosso, Av Fernando Correa da Costa s/n, 78060-900, Cuiabá, MT, Brazil aut Environmental Monitoring and Assessment Kluwer Academic Publishers 123/1-3(2006-12-01), 41-62 0167-6369 123:1-3<41 2006 123 10661 https://doi.org/10.1007/s10661-005-9114-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10661-005-9114-4 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zeilhofer Peter Departamento de Geografia, Universidade Federal de Mato Grosso, Av. Fernando Correa da Costa s/n, 78060-900, Cuiabá, MT, Brazil aut NATIONALLICENCE 700 1- Lima Eliana Departamento de Engenharia Sanitária e Ambiental, Universidade Federal de Mato Grosso, Av Fernando Correa da Costa s/n, 78060-900, Cuiabá, MT, Brazil aut NATIONALLICENCE 700 1- Lima Gilson Departamento de Engenharia Sanitária e Ambiental, Universidade Federal de Mato Grosso, Av Fernando Correa da Costa s/n, 78060-900, Cuiabá, MT, Brazil aut NATIONALLICENCE 773 0- Environmental Monitoring and Assessment Kluwer Academic Publishers 123/1-3(2006-12-01), 41-62 0167-6369 123:1-3<41 2006 123 10661 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer