Data/hora: 14/06/2024 01:06:43

Biblioteca(s): 	Embrapa Pantanal.	
Data corrente: 	07/08/1997	
Data da última atualização: 	05/04/2017	
Autoria: 	HESSION, W. C.; STORM, D. E.; HAAN, C. T.; BURKS, S. L.; MATLOCK, M. D.	
Título: 	A watershed-level ecological risk assessment methodology.	
Ano de publicação: 	1996	
Fonte/Imprenta: 	Water Resources Bulletin, v.32, n.5, p.1039-1054, Oct. 1996.	
Idioma: 	Inglês	
Conteúdo: 	We present an ecological risk assessment methodology at the watershed level for freshwater ecosystems. The major component is a pollutant transport and fate model (a modified EUTROMOD) wich an integrated uncertainty analysis utilizing a two-phase Monte Carlo procedure. The uncertainty analysis methodology distinguishes between knowledge uncertainty and stochastic variability. The model assesses the ecological risk of lentic (lake) ecosystems in response to the stress of excess phosphorrus resulting in eutrophication. The methodology and model were tested on the Wister Lake watershed in Oklahoma with the lake and its trophic state as the endpoint for ecological risk assessment. A geographic information system was used to store, manage, and manipulate spatially referenced data for model input.	
Palavras-Chave: 	Aquatic ecosystem; Ecossistema aquatico; Incerteza estatistica; Manejo de bacias hidrograficas; Modelagem; Modeling statistic; Modeling/statisitics; Modelo estatistico; Poluicao nao pontual; Qualidade d'agua; Sistema aquatico.	
Thesagro: 	Análise de Risco; Qualidade da Água.	
Thesaurus Nal: 	aquatic ecosystems; nonpoint source pollution; risk analysis; uncertainty; water quality; watershed management.	
Categoria do assunto: 	--	
Registro original: 	Embrapa Pantanal (CPAP)	
Exemplares: 	CPAP - (34683-1) - ADC - SP - PP - SP15328 -  - 15328 - DIS
CPAP - (36130-1) - ADC - SP - PP - SP15693 -  - 15693 - DIS