Vulnerabilidade à erosão do solo da região do Alto Rio Pardo, Pardinho, SP

Ribeiro, Fernanda Leite; Campos, Sérgio

doi:10.1590/s1415-43662007000600012

Cited by 16 publications

(14 citation statements)

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“…The recent expansion of digital representation has stimulated the development of automatic procedures to extract topographic and hydrologic information from Digital Terrain Model input, using GIS and hydrologic models that integrate multiple databases within a minimal time. Currently, several studies have been conducted using the tools of GIS in hydrographic basins (Campos et al, 2004;Lopes et al, 2007;Ribeiro & Campos, 2007), including for its delineation (Leão et al, 2004). However, until now the delineation of the Dourados basin was made manually from contour lines in topographical maps or from aerial photo-interpretation.…”

Section: Introductionmentioning

confidence: 99%

Comparison of methodologies for automatic generation of limits and drainage networks for hidrographic basins

Alcaraz

Sannier

Vitorino

et al. 2009

Rev. bras. eng. agríc. ambient.

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The objective of this work was to compare methodologies for the automatic generation of limits and drainage networks, using a geographical information system for basins of low relief variation, such as the Dourados catchment area. Various data/processes were assessed, especially the ArcHydro and AVSWAT interfaces used to process 50 m resolution DTMs formed from the interpolation of digitalized contour lines using ArcInfo, ArcView and Spring GIS, and a 90 m resolution SRTM DTM acquired by interferometry radar. Their accuracy was estimated based upon the pre-processing of small basic sub-basin units of different relief variations, before applying the best combinations to the entire Dourados basin. The accuracy of the automatic stream network generation and watershed delineation depends essentially on the quality of the raw digital terrain model. The selection of the most suitable one then depends completely on the aims of the user and on the work scale.

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Section: Introductionmentioning

confidence: 99%

Comparison of methodologies for automatic generation of limits and drainage networks for hidrographic basins

Alcaraz

Sannier

Vitorino

et al. 2009

Rev. bras. eng. agríc. ambient.

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“…Similar trend was observed by Gralhóz and Nogueira (2006) in a small and heavily polluted tributary of Araquá River. (Orsi, 2004), Pardo (Ribeiro and Campos, 2007), Capivara (Araújo Junior et al, 2002) and Araquá (Refosco, 1996) catchment uses. A5, L3, L4 and P3).…”

Section: Seasonalitymentioning

confidence: 99%

Differential environmental impacts on small and medium size rivers from center of São Paulo State, Brazil, and regional management perspectives

2014

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AIM: This study aimed to evaluate, comparatively, the influence of distinct environmental impacts in the watershed on the rivers Capivara, Lavapés, Araquá and Pardo and the transference of effects downstream. METHODS: The limnological/water quality study was carried out in rainy (March/2007) and dry (September/2007) seasons, considering 17 sampling stations. RESULTS: Variables such as channel width and depth, water velocity and temperature increased towards the river's mouth; water transparency, velocity and dissolved oxygen were higher in the upstream regions. Light penetration was total at most sampling stations and pH was predominantly acid. The sampling stations impacted by pollution sources, Lavapés and Araquá Rivers, exhibited higher values of electric conductivity, suspended solids, total nitrogen, nitrate, nitrite, ammonium, total dissolved phosphorus, BOD, and thermotolerant coliforms. Higher values of electric conductivity, turbidity and suspended solids were observed in the rainy season, whereas higher chlorophyll concentrations occurred in the dry season. The Lavapés River exhibits the worst environmental condition, while Capivara River is under better state of conservation. This study shows that it is urgent the implementation of measures for preservation and restoration of these regional aquatic ecosystems. All studied rivers were influenced by seasonal variation, sewage discharges and by watershed use and occupation. The TSI is a good analysis tool. The studied rivers export organic matter and TN, TP and SS loads to Tietê and Paranapanema rivers. CONCLUSIONS: This study show the importance of river management and that the accelerated degradation of the river systems indicates the little progress of the Brazilian legislation in terms of preservation and good management practices and that the interface between science, law, management and conservation need to be improved.

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“…La comprensión de la interacción entre el modelamiento matemático y el uso de los Sistemas de Información Geográfica (SIG), parte de la premisa de que los estudios de series temporales y de análisis espaciales deben ocurrir conjuntamente (CHRISTOFOLETTI, 1999). El control de la erosión deberá efectuarse a través del uso de acciones preventivas y después de su ocurrencia a través de acciones correctivas y la información sobre el potencial de la tierra para el uso y la ocupación, se debe obtener a través del mapa de riesgos de erosión (RIBEIRO, 2002). El objetivo general del estudio fue realizar el diagnóstico de degradación ambiental mediante la evaluación del potencial de erosión hídrica enlasub-cuenca del río Angasmarca en la Región La Libertad, siendo objetivos específicos: 1.…”

Section: Introduccionunclassified

Diagnóstico Del Potencial De Erosión Hidríca Mediante Técnicas De Geoprocesamiento en La Sub-Cuenca Del Río Angasmarca,la Libertad, Peru

Diaz

2015

An. cient. U.N.A.

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Vulnerabilidade à erosão do solo da região do Alto Rio Pardo, Pardinho, SP

Cited by 16 publications

References 0 publications

Comparison of methodologies for automatic generation of limits and drainage networks for hidrographic basins

Comparison of methodologies for automatic generation of limits and drainage networks for hidrographic basins

Differential environmental impacts on small and medium size rivers from center of São Paulo State, Brazil, and regional management perspectives

Diagnóstico Del Potencial De Erosión Hidríca Mediante Técnicas De Geoprocesamiento en La Sub-Cuenca Del Río Angasmarca,la Libertad, Peru

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