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Registros recuperados: 9
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A STUDY OF THE IMPACT OF LAND USE AND OCCUPATION ON BASIN WATER QUALITY THROUGH MULTIVARIATE STATISTICS REA
Santos,Gilmar O.; Hernandez,Fernando B. T.; Ferraudo,Antonio S.; Vanzela,Luiz S.; Santos,Duílio J. O..
ABSTRACT Without effective actions to improve environmental management, water resources tend to become scarce. Thus, this study aimed to understand the processes influencing the physical, chemical, and biological properties of the water due to land uses and occupation in the Ipê stream basin, in Ilha Solteira - SP (Brazil), regarding the dependence of the analyzed variables. Monitoring of chemical, physical, and biological water quality was performed from 2006 to 2011, and the records of land use and occupation in 2011. A factorial multivariate analysis allowed us to understand that the processes in densely populated areas increased degradation of water by the input of organic loads, yet those of farming areas enhanced the degradation of the chemical and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Factor analysis; Irrigation; Land use and occupation; River basin.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162017000300453
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Assessing Management Regimes in Transboundary River Basins: Do They Support Adaptive Management? Ecology and Society
Raadgever, G.T. (Tom); Centre for River Basin Administration, Delft University of Technology; G.T.Raadgever@tudelft.nl; Mostert, Erik; Centre for River Basin Administration, Delft University of Technology; E.Mostert@tudelft.nl; Kranz, Nicole; Ecologic - Institute for International and European Environmental Policy; Kranz@ecologic.de; Interwies, Eduard; InterSus - Sustainability Services; Interwies@intersus.eu; Timmerman, Jos G.; RWS Centre for Water Management; J.G.Timmerman@riza.rws.minvenw.nl.
River basin management is faced with complex problems that are characterized by uncertainty and change. In transboundary river basins, historical, legal, and cultural differences add to the complexity. The literature on adaptive management gives several suggestions for handling this complexity. It recognizes the importance of management regimes as enabling or limiting adaptive management, but there is no comprehensive overview of regime features that support adaptive management. This paper presents such an overview, focused on transboundary river basin management. It inventories the features that have been claimed to be central to effective transboundary river basin management and refines them using adaptive management literature. It then collates these...
Tipo: Peer-Reviewed article Palavras-chave: Adaptive management; Management regime; Orange; Rhine; River basin; Transboundary.
Ano: 2008
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Development of an annual drought classification system based on drought severity indexes Anais da ABC (AABC)
LIMA,RAFAEL P.C.; SILVA,DEMETRIUS D. DA; MOREIRA,MICHEL C.; PASSOS,JÉSSICA B.M.C.; COELHO,CLÍVIA D.; ELESBON,ABRAHÃO A.A..
Abstract: In order to characterize the occurrence and intensity of droughts in the Doce River Basin, as well as to develop a system for its classification, four different drought indexes were evaluated: Percent of Normal Precipitation (PNP), Deciles Method (DM), Rainfall Anomaly Index (RAI) and Standardized Precipitation Index (SPI). The indices were calculated annually, based on precipitation data from 89 rainfall stations of the Brazilian National Water Agency (ANA). Nine analysis units (AUs) were determined in the basin and the Thiessen Polygons method was used to obtain the average precipitation in the respective drainage areas. The indices were calculated for each AU and then related to the drought intensity classes. An overall classification of the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Climatic condition; Doce river; Precipitation; Rainfall season; River basin.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100852
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Dinâmica de sistemas aplicada à gestão de recursos hídricos em bacia hidrográfica AgEcon
Vieira, Wilson da Cruz.
The objective of this work was to analyze both the allocation of water among competing demands in a river basin and pricing policies for water. Based on a theoretical model that maximizes the net social benefits from the allocation of water over a finite period of time, it was used the dynamic systems approach to analyze various issues related to water resources management in a river basin, such as sustainability of water resources, and water pricing. The model was applied to the Araguari River Basin, located in the State of Minas Gerais.
Tipo: Journal Article Palavras-chave: River basin; System dynamics; Water resources; Water pricing; Sustainability; Environmental Economics and Policy.
Ano: 2008 URL: http://purl.umn.edu/53856
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Hidrogeochemical comparative study of the Jaú and Jacaré-Guaçu River watersheds, São Paulo, Brazil BJB
SOUZA,A. D. G. de; TUNDISI,J. G..
The main subject of the present work was to carry out a hydrochemistry comparative study between two river basins in São Paulo State: the Jacaré-Guaçu Basin (21°37'-22°22'S and 47°43'-48°57'W) and the Jaú Basin (22°09'-22°28'S and 48°16'-48°47'W). Nine sampling points in the Jacaré-Guaçu River and eight in the Jaú River were established. The water sampling was performed once each two months from March/95 to September/95. The following variables were analyzed: temperature (°C), pH, conductivity (muScm--1), dissolved oxygen (mg/L) and ionic water composition. Comparatively the Jaú River showed higher spatial variability, less oxygenated water and higher mineralization, due to high pedological and geological substrate richness, point sources existence and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: River basin; River chemistry; Land uses.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71082000000400004
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Mapping of summer agricultural crops in the Alto Paraguai basin through EVI/MODIS time series. Repositório Alice
CECHIM JÚNIOR, C.; ANTUNES, J. F. G.; JOHANN, J. A.; ESQUERDO, J. C. D. M..
The main land use and land cover (LULC) changes that a given area passes over the time can be evaluated by using spatial-temporal analysis of satellites images. Then, it is possible to identify the LULC changes, as well as the main causes of environmental impacts. The objective of this paper was to analyze the LULC changes of the main agricultural lands cultivated in the Alto Paraguai Basin (BAP). This paper focused on the summer crops (soybean and corn) and the analysis of agricultural expansion. The results, considering a16-year comparison, showed an increase of 40.60% in the expansion of agricultural areas. The evaluation of the accuracy showed the efficiency of the methodology of agricultural mapping, presenting a Kappa Index of 0.85 for the 2000/2001...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Processamento de imagem; Séries temporais; Bacia do Alto Paraguai; River basin; Sensoriamento remoto; Bacia hidrográfica; Remote sensing; Image analysis; Time series analysis; Watersheds; Land use; Land cover.
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1082849
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Mechanisms of Resilience in Common-pool Resource Management Systems: an Agent-based Model of Water Use in a River Basin Ecology and Society
The concept of resilience is widely promoted as a promising notion to guide new approaches to ecosystem and resource management that try to enhance a system's capacity to cope with change. A variety of mechanisms of resilience specific for different systems have been proposed. In the context of resource management those include but are not limited to the diversity of response options and flexibility of the social system to adaptively respond to changes on an adequate scale. However, implementation of resilience-based management in specific real-world systems has often proven difficult because of a limited understanding of suitable interventions and their impact on the resilience of the coupled social-ecological system. We propose an agent-based modeling...
Tipo: Peer-Reviewed Reports Palavras-chave: Adaptive management; Agent-based model; Amudarya; Diversification; Fisheries; Irrigation; Mechanism; Resilience; River basin; Social-ecological system; Water use..
Ano: 2007
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River basins as social-ecological systems: linking levels of societal and ecosystem water metabolism in a semiarid watershed Ecology and Society
Cabello, Violeta; Department of Human Geography, University of Seville; vcabellov@gmail.com; Willaarts, Barbara A.; Research Centre for the Management of Agricultural and Environmental Risks - CEIGRAM, Technical University of Madrid.; barbara.willaarts@upm.es; Aguilar, Monica; Department of Physical Geography, University of Seville; malba@us.es; del Moral Ituarte, Leandro; Department of Human Geography, University of Seville; lmoral@us.es.
River basin modeling under complexity requires analytical frameworks capable of dealing with the multiple scales and dimensions of environmental problems as well as uncertainty in the evolution of social systems. Conceptual and methodological developments can now be framed using the wide socio-eco-hydrological approach. We add hierarchy theory into the mix to discuss the conceptualization of river basins as complex, holarchic social-ecological systems. We operationalize the social-ecological systems water metabolism framework in a semiarid watershed in Spain, and add the governance dimension that shapes human-environment reciprocity. To this purpose, we integrate an eco-hydrological model with the societal metabolism accounting scheme for land use, human...
Tipo: Peer-Reviewed Reports Palavras-chave: Holarchy; River basin; Socio-eco-hydrology; Social-ecological systems; Water availability; Water metabolism.
Ano: 2015
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The french approach to managing water resources in the mediterranean and the new European Water Framework Directive ArchiMer
Henocque, Yves; Andral, Bruno.
The main content of the new European Water Framework Directive is presented. Within its river basin management approach, a special mention of coastal waters status is made. Among the issues at stake are the setting up of river basin management plans, including coastal waters, and water quality assessment system leading to an harmonized definition of quality objectives and their appropriate indicators. The Rhone-Mediterranean-Corsica Water Master Plan, launched in 1996, is considered to be well fitted to this river basin approach and the necessary tools which go with it. It shows up how a river quality assessment system (SEQ) can be adapted to the coastal waters and how it can progressively lead to an efficient set of publishable environmental and...
Tipo: Text Palavras-chave: Indicators; Quality assessment; Coastal zone; River basin; Integrated management.
Ano: 2003 URL: http://archimer.ifremer.fr/doc/2003/publication-429.pdf
Registros recuperados: 9
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