Assessing large spatial scale landscape change effects on water quality and quantity response in the lower Athabasca River basin

2012 ◽  
Vol 9 (3) ◽  
pp. 392-404 ◽  
Author(s):  
Nicole E Seitz ◽  
Cherie J Westbrook ◽  
Monique G Dubé ◽  
Allison J Squires
Keyword(s):  
Water Quality ◽  
Spatial Scale ◽  
River Basin ◽  
Landscape Change ◽  
Large Spatial Scale ◽  
Athabasca River ◽  
Water Quality And Quantity

scholarly journals Determinants of Residents’ Willingness to Accept and Their Levels for Ecological Conservation in Ganjiang River Basin, China: An Empirical Analysis of Survey Data for 677 Households

2019 ◽  
Vol 11 (21) ◽  
pp. 6138 ◽  
Author(s):  
Kai Xiong ◽  
Ning Zhang ◽  
Chih-Chun Kung ◽  
Fanbin Kong
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Residential Location ◽  
Disposable Income ◽  
Ecological Environment ◽  
Willingness To Accept ◽  
Location Decision ◽  
Ecological Conservation ◽  
Water Quality And Quantity ◽  
Ganjiang River Basin

Using the contingent valuation method and the Heckman two-stage model, we explore residents’ willingness to accept (WTA) compensation and their WTA level for ecological conservation compensation in the upstream of the Ganjiang River Basin in China. The findings reveal that 86.26% of the respondents are willing to accept compensation, and the average compensation level is ¥789.60/household per year. The residents’ gender, annual disposable income, residential location, decision on whether or not the watershed environment is important, and their satisfaction with water quality and quantity are significantly related to their WTA. The influencing factors that significantly affect compensation level are residents’ occupation, educational background, annual disposable income, family size, residential location, decision on whether or not the watershed environment is important, and their satisfaction with water quality and quantity. The results of this empirical research have important policy implications: the government should strengthen advocacy and education of watershed ecological environment protection, intensify farming and other agricultural activities, establish a differentiated and diversified compensation strategy, so as to protect and improve the ecological environment of the Ganjiang River Basin.

scholarly journals Análise de Pressões à Escala Espacial numa Barcia Hidrográfica de Características Mediterrânicas (Bacia do Pardiela-Guadiana, Portugal) (Analysing Pressures at Spatial Scale in a Mediterranean Basin (Pardiela Basin -Guadiana, Portugal))

2013 ◽  
Vol 5 (6) ◽  
pp. 1284
Author(s):  
Manuela Morais ◽  
Ana Pedro ◽  
Joana Rosado ◽  
Antônio Serafim ◽  
Helena Silva ◽  
...  
Keyword(s):  
Water Quality ◽  
Spatial Scale ◽  
River Basin ◽  
Mediterranean Basin ◽  
Swat Model ◽  
Hydrologic Cycle ◽  
Anthropogenic Pressures ◽  
Environmental Objectives ◽  
Basin Scale ◽  
Southern Portugal

Os rios temporários são definidos como sistemas que durante um determinado período do ano não apresentam caudal superficial. São frequentes em regiões de características mediterrânicas, onde a ausência de precipitação durante os meses mais quentes do ano conduz à interrupção do caudal superficial. Assiste-se assim a uma diminuição natural dos padrões de qualidade da água devido à ausência de corrente, encontrando-se os rios no máximo da sua vulnerabilidade. Em épocas opostas no ano, a ocorrência de enxurradas, com origem em fortes precipitações, tem como consequência a exportação dos materiais acumulados que se depositam em reservatórios situados a jusante. O ciclo de seca e enxurrada, constitui um fator determinante na estrutura e funcionamento dos rios no Sul de Portugal, apresentando as comunidades biológicas adaptações específicas a estes fenómenos perturbadores. Contudo, ao longo da bacia, a temporalidade dos rios segue um gradiente de disponibilidade hídrica. Nas cabeceiras os rios apresentam um regime efémero muito dependente da ocorrência de eventos extremos de precipitação; para jusante a afluência de água aumenta, apresentando os rios características temporárias do tipo sazonal; nos troços inferiores é comum a ocorrência de um regime hidrológico permanente. Consequentemente, os problemas relacionados com a qualidade da água são locais, surgindo relacionados com a disponibilidade hídrica e com as pressões antropogénicas. Neste trabalho, considerando como caso de estudo a bacia do rio Pardiela localizada no sul de Portugal de características mediterrânicas (bacia do rio Guadiana), pretende-se: (i) caracterizar o ciclo hidrológico em termos de disponibilidade de água, através da utilização do modelo SWAT; (ii) quantificar as cargas de nitrogénio total, fósforo total e sólidos suspensos totais, afluentes ao sistema a uma escala espacial e temporal; (iii) caracterizar o efeito da primeira enxurrada após o período seco de verão; (iii) identificar problemas e propor medidas específicas que promovam, por um lado, a obtenção de um maior conhecimento sobre as questões ambientais que contribuam para a diminuição de conflitos entre setores de atividade e atores sociais e, por outro, sustentem a tomada de decisões pelas entidades competentes. Os resultados obtidos evidenciam a necessidade de em função das pressões identificadas na bacia hidrográfica se propor objetivos e medidas, e promover sistemas de gestão à escala da sub-bacia. Só assim se permitirá identificar os fatores que controlam o sistema, tais como o ciclo hidrológico, as descargas urbanas, a ocupação de solo, as práticas agrícolas e a vegetação ripícola, e compreender a sua variabilidade em função do regime hidrológico.Analysing Pressures at Spatial Scale in a Mediterranean Basin (Pardiela Basin -Guadiana, Portugal)A B S T R A C TTemporary streams are defined as those that do not present discharge during part of the year. They are widespread in Mediterranean regions, where the nonexistence of rainfall during warmer months leads to the absence of discharge. This originates a decrease in water quality increasing the streams vulnerability. During months with the highest rainfall, flash floods occur, transporting materials accumulated in the riverbed to reservoirs located downstream. The expansion and contraction cycle constitutes a determinant factor in the structure and function of the streams in southern Portugal. Consequently, biological communities present specific adaptations to these disturbances. However, there is a water available gradient along the river basin. In headwaters, stream reaches present an ephemeral discharge, highly dependent on rainfall events. Further downstream, the discharge increases and the river present a seasonal temporary regime. In lower reaches, more frequently, the discharge is permanent. The problems related with water quality are site specific, in regard to anthropogenic pressures and water availability. In this work focused on the study of the Pardiela basin, located in southern Portugal with Mediterranean characteristics Guadiana basin), the main goals are: (i) to characterize the hydrologic cycle in terms of water available, using a SWAT model; (ii) to quantify nitrogen, phosphorus and solid suspended loads (ton/month); (iii) to characterize the effect of the first flood after the summer dry period. The obtained results illustrate the necessity to propose objectives and measures, adapted to the pressures identified in the river basin, and to develop management programmes that operate at sub-basin scale. Only then, it will be possible to identify the factors that control the system, such as hydrology, urban discharges, land use, agriculture, and riparian vegetation in regard to their variability and to the temporary hydrological regime.Keywords: Mediterranean temporary streams; hydrologic cycle; Loads; flush flood events; environmental objectives and measures. 

Modeling the effects of human influences on water quality and quantity in the Zarrineh River Basin, Iran

2021 ◽  
Author(s):  
Sahere Golzari ◽  
Hamid Zare Abyaneh ◽  
Naghmeh Mobarghaee Dinan ◽  
Majid Delavar ◽  
Paul Daniel Wagner
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Water Quality And Quantity

Characteristics of Water Quality in Tributaries of the Sumjin River Basin

2017 ◽  
Vol 18 (6) ◽  
pp. 563-570
Author(s):  
Se Chang Son ◽  
Dae Hoon Kim ◽  
Jae Chun Lee ◽  
Jae Young Jae Young ◽  
Ki Wan Lee ◽  
...  
Keyword(s):  
Water Quality ◽  
River Basin

Water Quality Characteristics for Agricultural Reservoirs in Yeongsan River Basin

2020 ◽  
Vol 21 (1) ◽  
pp. 15-23
Author(s):  
Sang-Guen Oh ◽  
Jae-Young Lee ◽  
Jae-Woon Jung ◽  
Ju-Tae Song ◽  
Sang-Yun You ◽  
...  
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Quality Characteristics
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