scholarly journals Streams with Riparian Forest Buffers versus Impoundments Differ in Discharge and DOM Characteristics for Pasture Catchments in Southern Amazonia

Water ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 390 ◽  
Author(s):  
Higo Dalmagro ◽  
Michael Lathuillière ◽  
Fernando Sallo ◽  
Maurel Guerreiro ◽  
Osvaldo Pinto ◽  
...  
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Amazon Basin ◽  
Riparian Forest ◽  
Stream Water ◽  
Riparian Buffer ◽  
Stream Water Quality ◽  
Fluorescence Characteristics ◽  
Southern Amazonia ◽  
Forested Buffer

Forest to pasture land use change following deforestation in Southern Amazonia can result in changes to stream water quality. However, some pasture streams have riparian forest buffers, while others are dammed for farm ponds. Stream corridor management can have differential effects on hydrology and dissolved organic matter (DOM) characteristics. We examined rainfall-runoff patterns and DOM characteristics in a pasture catchment with a forested riparian buffer, and an adjacent catchment with an impoundment. Total streamflow was 1.5 times higher with the riparian buffer, whereas stormflow represented 20% of total discharge for the dammed stream versus 13% with buffer. Stream corridor management was also the primary factor related to DOM characteristics. In the impounded catchment, DOM was found to be less structurally complex, with lower molecular weight compounds, a lesser degree of humification, and a larger proportion of protein-like DOM. In the catchment with a forested buffer, DOM was dominated by humic-like components, with fluorescence characteristics indicative of DOM derived from humified soil organic matter under native vegetation. Our results suggest that differences in stream corridor management can have important implications for carbon cycling in headwater pasture catchments, and that such changes may have the potential to influence water quality downstream in the Amazon basin.

scholarly journals Effects of Land Use on Stream Water Quality in the Rapidly Urbanized Areas: A Multiscale Analysis

Water ◽  
2020 ◽  
Vol 12 (4) ◽  
pp. 1123 ◽  
Author(s):  
Yu Song ◽  
Xiaodong Song ◽  
Guofan Shao ◽  
Tangao Hu
Keyword(s):  
Water Quality ◽  
Land Use ◽  
Spatial Scale ◽  
Landscape Metrics ◽  
Stream Water ◽  
Riparian Buffer ◽  
Stream Water Quality ◽  
Land Use Pattern ◽  
Circular Buffer ◽  
Effects Of Land Use

The land use and land cover changes in rapidly urbanized regions is one of the main causes of water quality deterioration. However, due to the heterogeneity of urban land use patterns and spatial scale effects, a clear understanding of the relationships between land use and water quality remains elusive. The primary purpose of this study is to investigate the effects of land use on water quality across multi scales in a rapidly urbanized region in Hangzhou City, China. The results showed that the response characteristics of stream water quality to land use were spatial scale-dependent. The total nitrogen (TN) was more closely related with land use at the circular buffer scale, whilst stronger correlations could be found between land use and algae biomass at the riparian buffer scales. Under the circular buffer scale, the forest and urban greenspace were more influential to the TN at small buffer scales, whilst significant positive or negative correlations could be found between the TN and the areas of industrial land or the wetland and river as the buffer scales increased. The redundancy analysis (RDA) showed that more than 40% variations in water quality could be explained by the landscape metrics at all circular and riparian buffer scales, and this suggests that land use pattern was an important factor influencing water quality. The variation in water quality explained by landscape metrics increased with the increase of buffer size, and this implies that land use pattern could have a closer correlation with water quality at larger spatial scales.

Water quality and prospects for revitalization of an urban stream in Recife, Brazil

2020 ◽  
Vol 11 (5) ◽  
pp. 284-294
Author(s):  
José Luís Said Cometti ◽  
Jaime Joaquim da Silva Pereira Cabral ◽  
Taylse Marielly da Conceição
Keyword(s):  
Water Quality ◽  
Riparian Forest ◽  
Stream Water ◽  
Oxygen Demand ◽  
Urban Stream ◽  
The European Union ◽  
Stream Water Quality ◽  
Anthropogenic Pressures ◽  
Untreated Sewage ◽  
Lake Zone

The urbanization of Recife characterized an occupation of the Capibaribe River banks and its tributaries. This caused the grounding, rectification and degradation of several streams. Thus, this paper presents a diagnosis of the Cavouco stream water quality and suggests measures for its restoration. The collections were performed between 2016 and 2017 in three sampling points. Analysis adopted the Standard Methods for the Examination of Water and Wastewater and calculated the Water Quality Index (WQI). A correlation test between the parameters was applied to understand the phenomenon. Actions to revitalize it followed the European Union Water Framework Directive. The WQI of the Cavouco stream had a good presentation in the small lake zone; it was poor in the Federal University (UFPE) region and awful in the Caxangá Avenue section.  Dissolved Oxygen (OD) concentration was negatively correlated with Biochemical Oxygen Demand (BOD), decreasing from upstream to downstream.  Water quality degradation is associated with untreated sewage discharge along the stream. The proposal to its recovery is to collect and treat domestic sewage, remove irregular housing, restore the riparian forest, control erosion, create linear parks and search for governance mechanisms with public participation. The proposed interventions are fundamental for the restoration of Cavouco's ecological potential, with improved water quality and reduced anthropogenic pressures.

scholarly journals Past and present land use influences on tropical riparian zones: an isotopic assessment with implications for riparian forest width determination

2016 ◽  
Vol 16 (2) ◽  
Author(s):  
Luiz Felippe Salemi ◽  
Silvia Rafaela Machado Lins ◽  
Elizabethe de Campos Ravagnani ◽  
Marcelo Magioli ◽  
Melissa Gaste Martinez ◽  
...  
Keyword(s):  
Land Use ◽  
Organic Matter ◽  
Agricultural Landscape ◽  
Riparian Forest ◽  
Stream Water ◽  
Agricultural Landscapes ◽  
Riparian Areas ◽  
Stream Water Quality ◽  
Exotic Grasses ◽  
Forest Act

Abstract In this article, by using carbon stable isotopes, we assessed the past and present land use influences that riparian areas are subject within agricultural landscapes. Emphasis is given to the understanding of the effects of the 2012 Brazilian Forest Act on such areas. We selected five riparian areas within a highly C4 dominated agricultural landscape. Three of them had 30 meters native riparian forest buffer (NRFB) and two of them had 8 meter and no NRFB. We used three 100 meter-transects located 5, 15 and 30 meters relative to stream channel to obtain soil samples (0 - 10 cm). All riparian areas presented soil carbon isotopic signatures that are not C3 (native forests) irrespective of having or not 30 meters NRFB. Two cases presenting less than 30 meters NRFB had higher C4 derived carbon contribution. All of the other three areas that followed the 30 meters NRFB presented, to some degree, C4 derived carbon, which was attributed to C4 organic matter deposition originated from cultivated areas and, in one case, to the persistence of former exotic grasses. With the 2012 Forest Act allowing narrower buffers (< 30 meters), we expect C4 contributions to soil organic matter to remain high in riparian areas and streams within agricultural landscapes dominated by C4 plants where 30 meter NRFB is no longer required. Such contributions will likely continue to have detrimental effects on stream water quality and biota.

Can the structure of a riparian forest remnant influence stream water quality? A tropical case study

Hydrobiologia ◽  
2013 ◽  
Vol 724 (1) ◽  
pp. 175-185 ◽  
Author(s):  
Janaína de F. Fernandes ◽  
Andréa L. T. de Souza ◽  
Marcel O. Tanaka
Keyword(s):  
Water Quality ◽  
Riparian Forest ◽  
Stream Water ◽  
Stream Water Quality ◽  
Forest Remnant

Impacts of Multi-Scale Landscape Pattern on Stream Water Quality

2011 ◽  
Vol 356-360 ◽  
pp. 1586-1589
Author(s):  
He Bing Hu ◽  
Hong Yu Liu ◽  
Jing Feng Hao ◽  
Jin An
Keyword(s):  
Water Quality ◽  
Stream Water ◽  
Riparian Buffer ◽  
Edge Density ◽  
Watershed Scale ◽  
Stream Water Quality ◽  
Stream Length ◽  
Landscape Characteristics ◽  
Multi Scale ◽  
Multiple Line

Water quality–landscape interaction were explored using multiple line regression in watershed, total stream corridor (200-m riparian buffer extending the entire stream length upstream of the site) and the local stream corridor (200-m riparian buffer extending 1000 m upstream of the site).The results showed that the catchment landscape characteristics appeared to have slightly greater influence on water quality than the total stream corridor and local stream corridor. The edge density of construction land and percent cultivated land had the greatest influence on water quality in watershed scale. The edge density of forest land and percent forest had the greatest influence on water quality in total stream corridor scale, but percent forest and PD had the greatest influence on water quality in the local stream corridor scale.

scholarly journals CONSEQÜÊNCIAS DA ALTERAÇÃO DA VAZÃO SOBRE ALGUNS PARÂMETROS DE QUALIDADE DE ÁGUA FLUVIAL

FLORESTA ◽  
2003 ◽  
Vol 33 (2) ◽  
Author(s):  
Elenice Fritzsons ◽  
Eduardo Chemas HindiI ◽  
Luiz Eduardo Mantovani ◽  
Nivaldo Eduardo Rizzi
Keyword(s):  
Water Quality ◽  
Organic Matter ◽  
Standard Deviation ◽  
Stream Water ◽  
Water Discharge ◽  
Hydrological Regime ◽  
High Variability ◽  
Metropolitan Region ◽  
Stream Water Quality ◽  
Quality Water

A variação na qualidade de água depende do regime hidrológico do rio, principalmente da variabilidade do deflúvio. Este trabalho foi conduzido na bacia hidrográfica do Alto Capivari, localizada 20 km ao norte da Região Metropolitana de Curitiba, Estado do Paraná, Brasil. Foram analisados e comparados dados diários de qualidade de água e de vazão de 1998 a 1999. Os resultados mostram que a qualidade das águas sofreram grande variação com a vazão, principalmente em relação a alguns parâmetros de qualidade, tais como turbidez, pH, alcalinidade, cor e matéria orgânica. Esta alta variabilidade foi relacionada ao deflúvio por meio de coeficientes correlação. As correlações encontradas foram fortes, denotando uma tendência, quando comparados intervalos de vazão com a média dos valores médios dos parâmetros. Com exceção do pH e alcalinidade, todos os parâmetros tiveram seus valores elevados quando há aumento na vazão, o mesmo ocorrendo com o desvio padrão. Abstract Water quality variability depends on the hydrological regime of the river or stream, meanly water discharge variability. This work was carried out in the Alto Capivari basin, located 20 km northern part of Curitiba’s Metropolitan Region, Paraná state, Brazil. Daily dates of quality water and water discharge from 1998 to 1999 were analyzed and compared. The results reveal that the stream water quality varies significantly with discharge mainly for turbidity, alkalinity, pH, color and organic matter. This high variability was linked to discharge by means of coefficient of correlation. The results indicate a good correlation while comparing the discharge intervals in the stream with average of the studied parameters. With exception of pH and alkalinity, all parameters increased with increasing the discharge and it occurred with standard deviation.

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