scholarly journals An explicit GIS-based river basin framework for aquatic ecosystem conservation in the Amazon

2016 ◽  
Vol 8 (2) ◽  
pp. 651-661 ◽  
Author(s):  
Eduardo Venticinque ◽  
Bruce Forsberg ◽  
Ronaldo Barthem ◽  
Paulo Petry ◽  
Laura Hess ◽  
...  
Keyword(s):  
River Basin ◽  
Spatial Model ◽  
Aquatic Ecosystems ◽  
Large Scale ◽  
Amazon Basin ◽  
River System ◽  
Aquatic Systems ◽  
Petroleum Exploration ◽  
Infrastructure Development ◽  
Multi Scale

Abstract. Despite large-scale infrastructure development, deforestation, mining and petroleum exploration in the Amazon Basin, relatively little attention has been paid to the management scale required for the protection of wetlands, fisheries and other aspects of aquatic ecosystems. This is due, in part, to the enormous size, multinational composition and interconnected nature of the Amazon River system, as well as to the absence of an adequate spatial model for integrating data across the entire Amazon Basin. In this data article we present a spatially uniform multi-scale GIS framework that was developed especially for the analysis, management and monitoring of various aspects of aquatic systems in the Amazon Basin. The Amazon GIS-Based River Basin Framework is accessible as an ESRI geodatabase at doi:10.5063/F1BG2KX8.

scholarly journals An Explicit GIS-Based River Basin Framework for Aquatic Ecosystem Conservation in the Amazon

2016 ◽  
Author(s):  
Eduardo Venticinque ◽  
Bruce Forsberg ◽  
B. Ronaldo Barthen ◽  
Paulo Petry ◽  
Laura Hess ◽  
...  
Keyword(s):  
River Basin ◽  
Spatial Model ◽  
Aquatic Ecosystems ◽  
Large Scale ◽  
Amazon Basin ◽  
River System ◽  
Aquatic Systems ◽  
Petroleum Exploration ◽  
Infrastructure Development ◽  
Multi Scale

Abstract. Despite large-scale infrastructure development, deforestation, mining and petroleum exploration in the Amazon Basin, relatively little attention has been given to the management scale required for the protection of wetlands, fisheries and other aspects of aquatic ecosystems. This is due, in part, to the enormous size, multinational composition and interconnected nature of the Amazon River system, but also to the absence of an adequate spatial model for integrating data across the entire Amazon Basin. In this data article we present a spatially uniform multi-scale GIS framework that was developed especially for the analysis, management and monitoring of various aspects of aquatic systems in the Amazon Basin. The Amazon GIS-Based River Basin Framework is accessible as an ESRI geodatabase at https://knb.ecoinformatics.org/#view/doi:10.5063/F1BG2KX8.

General Characteristics and Variability of Climate in the Amazon Basin and its Links to the Global Climate System

2001 ◽  
Author(s):  
Jose A. Marengo ◽  
Carlos A. Nobre
Keyword(s):  
Surface Temperature ◽  
Land Surface ◽  
Large Scale ◽  
Amazon Basin ◽  
Global Climate ◽  
River System ◽  
Climate System ◽  
Wet Season ◽  
Tropospheric Circulation ◽  
The Tropics

The Amazon region is of particular interest because it represents a large source of heat in the tropics and has been shown to have a significant impact on extratropical circulation, and it is Earth’s largest and most intense land-based convective center. During the Southern Hemisphere summer when convection is best developed, the Amazon basin is one of the wettest regions on Earth. Amazonia is of course not isolated from the rest of the world, and a global perspective is needed to understand the nature and causes of climatological anomalies in Amazonia and how they feed back to influence the global climate system. The Amazon River system is the single, largest source of freshwater on Earth. The flow regime of this river system is relatively unimpacted by humans (Vörösmarty et al. 1997 a, b) and is subject to interannual variability in tropical precipitation that ultimately is translated into large variations in downstream hydrographs (Marengo et al. 1998a, Vörösmarty et al. 1996, Richey et al. 1989a, b). The recycling of local evaporation and precipitation by the forest accounts for a sizable portion of the regional water budget (Nobre et al. 1991, Eltahir 1996), and as large areas of the basin are subject to active deforestation there is grave concern about how such land surface disruptions may affect the water cycle in the tropics (see reviews in Lean et al. 1996). Previous studies have emphasized either how large-scale atmospheric circulation or land surface conditions can directly control the seasonal changes in rainfall producing mechanisms. Studies invoking controls of convection and rainfall by large-scale circulation emphasize the relationship between the establishment of upper-tropospheric circulation over Bolivia and moisture transport from the Atlantic ocean for initiation of the wet season and its intensity (see reviews in Marengo et al. 1999). On the other hand, Eltahir and Pal (1996) have shown that Amazon convection is closely related to land surface humidity and temperature, while Fu et al. (1999) indicate that the wet season in the Amazon basin is controlled by both changes in land surface temperature and the sea surface temperature (SST) in the adjacent oceans, depending if the region is north-equatorial or southern Amazonia.

scholarly journals New species of Cetopsidium (Siluriformes: Cetopsidae: Cetopsinae) from the upper rio Branco system in Guyana

2009 ◽  
Vol 7 (3) ◽  
pp. 289-293 ◽  
Author(s):  
Richard P. Vari ◽  
Carl J. Ferraris Jr.
Keyword(s):  
New Species ◽  
River Basin ◽  
Amazon Basin ◽  
River System ◽  
The Body ◽  
Dna Barcodes ◽  
Pectoral Fins ◽  
Pelvic Fin

Cetopsidium soniae, new species, is described from the Takutu River basin of southwestern Guyana, within the upper portions of the rio Branco of the Amazon basin. The new species differs from its congeners in details of pigmentation, the length of the pelvic fin, the form of the first rays of the dorsal and pectoral fins in mature males, the relative alignment of the dorsal and ventral profiles of the postdorsal portion of the body, the position of the anus, and the depth of the body. DNA barcodes were generated for the holotype and paratype. An examination of other samples of Cetopsidium from the rio Branco system extends the range of C. pemon into the Ireng River system of Guyana.

Pragmatic state rescaling: The dynamics and diversity of state space in Indonesian megaproject planning and governance

2021 ◽  
pp. 239965442110309
Author(s):  
Delik Hudalah ◽  
Tessa Talitha ◽  
Seruni Fauzia Lestari
Keyword(s):  
High Speed ◽  
Large Scale ◽  
Theoretical Perspective ◽  
Infrastructure Development ◽  
Multi Scale ◽  
Policy Domain ◽  
State Involvement ◽  
State Activism ◽  
Planning Development ◽  
Shed Light

In the past decade, Indonesia has become one of the Asian countries that massively promote large-scale infrastructure development to stimulate economic growth and improve the nation's competitiveness. Using the theoretical perspective of state rescaling, we explore how megaproject complexity defines the scope and process of state involvement in Indonesia's regional infrastructure planning, development, and governance. Aided by a typology of state rescaling, we compare two megaproject case studies: the Jakarta-Bandung High-Speed Train (JBHST) and the Kertajati International Airport and Aerocity (KIAA). It reveals that the dynamics of political culture, governance style, and policy domain shed light on the pragmatic rediscovering of state activism to manage risk and uncertainty in Indonesia’s multi-actor and multi-scale megaproject decision-making environment.

scholarly journals Ecohydromorphology of river environments of the das Velhas River upstream of Rio de Pedras hydroelectric reservoir, MG, Brazil

2016 ◽  
Vol 4 (1) ◽  
pp. 41
Author(s):  
Helena Lúcia Menezes Ferreira ◽  
Paulo de Tarso Amorim Castro ◽  
Márcia Couto Melo ◽  
Pedro Fialho Cordeiro ◽  
Aylton Carlos Soares ◽  
...  
Keyword(s):  
River Basin ◽  
Large Scale ◽  
Ecological Integrity ◽  
River System ◽  
Minas Gerais ◽  
Water Bodies ◽  
Hydroelectric Reservoir ◽  
Physico Chemical ◽  
Chemical Conditions

<p>This paper presents the applicability of ecohydromorphology assessment in differentiating ecophysical structure of river habitats of Rio das Velhas river basin upward of Rio de Pedras reservoir, Minas Gerais,Brazil. It also presents the identification of the factors conditioning the ecophysical structure of river habitats. This review associated with biological and physico-chemical conditions of the waters aims to assess the ecological integrity of the river system and also validate the characterization of water bodies identified on a large scale in the Rio das Velhas basin.</p>

scholarly journals The Rise of Climate-Driven Sediment Discharge in the Amazonian River Basin

Atmosphere ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 208 ◽  
Author(s):  
Nazzareno Diodato ◽  
Naziano Filizola ◽  
Pasquale Borrelli ◽  
Panos Panagos ◽  
Gianni Bellocchi
Keyword(s):  
River Basin ◽  
Amazon Basin ◽  
Global Climate ◽  
Climate Extremes ◽  
Temporal Variations ◽  
Sediment Discharge ◽  
Storm Events ◽  
Discharge Data ◽  
Magdalena River ◽  
Sediment Export

The occurrence of hydrological extremes in the Amazon region and the associated sediment loss during rainfall events are key features in the global climate system. Climate extremes alter the sediment and carbon balance but the ecological consequences of such changes are poorly understood in this region. With the aim of examining the interactions between precipitation and landscape-scale controls of sediment export from the Amazon basin, we developed a parsimonious hydro-climatological model on a multi-year series (1997–2014) of sediment discharge data taken at the outlet of Óbidos (Brazil) watershed (the narrowest and swiftest part of the Amazon River). The calibrated model (correlation coefficient equal to 0.84) captured the sediment load variability of an independent dataset from a different watershed (the Magdalena River basin), and performed better than three alternative approaches. Our model captured the interdecadal variability and the long-term patterns of sediment export. In our reconstruction of yearly sediment discharge over 1859–2014, we observed that landscape erosion changes are mostly induced by single storm events, and result from coupled effects of droughts and storms over long time scales. By quantifying temporal variations in the sediment produced by weathering, this analysis enables a new understanding of the linkage between climate forcing and river response, which drives sediment dynamics in the Amazon basin.

scholarly journals Public Awareness: What Climate Change Scientists Should Consider

2020 ◽  
Vol 12 (20) ◽  
pp. 8369
Author(s):  
Mohammad Rahimi
Keyword(s):  
Climate Change ◽  
Social Media ◽  
Large Scale ◽  
Public Awareness ◽  
Connected Network ◽  
Multi Scale ◽  
Valuable Addition ◽  
Scientific Approach ◽  
Design Solutions ◽  
Mitigate Climate Change

In this Opinion, the importance of public awareness to design solutions to mitigate climate change issues is highlighted. A large-scale acknowledgment of the climate change consequences has great potential to build social momentum. Momentum, in turn, builds motivation and demand, which can be leveraged to develop a multi-scale strategy to tackle the issue. The pursuit of public awareness is a valuable addition to the scientific approach to addressing climate change issues. The Opinion is concluded by providing strategies on how to effectively raise public awareness on climate change-related topics through an integrated, well-connected network of mavens (e.g., scientists) and connectors (e.g., social media influencers).

scholarly journals The Impacts of Hydropower Dams in the Mekong River Basin: A Review

Water ◽  
2021 ◽  
Vol 13 (3) ◽  
pp. 265
Author(s):  
Akarath Soukhaphon ◽  
Ian G. Baird ◽  
Zeb S. Hogan
Keyword(s):  
River Basin ◽  
River System ◽  
Economic Security ◽  
Mekong River ◽  
Aquatic Biodiversity ◽  
Environmental Impact Assessments ◽  
The Social ◽  
Hydropower Dams ◽  
River Hydrology ◽  
Riparian Communities

The Mekong River, well known for its aquatic biodiversity, is important to the social, physical, and economic health of millions living in China, Myanmar, Laos, Thailand, Cambodia, and Vietnam. This paper explores the social and environmental impacts of several Mekong basin hydropower dams and groupings of dams and the geographies of their impacts. Specifically, we examined the 3S (Sesan, Sekong Srepok) river system in northeastern Cambodia, the Central Highlands of Vietnam, and southern Laos; the Khone Falls area in southern Laos; the lower Mun River Basin in northeastern Thailand; and the upper Mekong River in Yunnan Province, China, northeastern Myanmar, northern Laos, and northern Thailand. Evidence shows that these dams and groupings of dams are affecting fish migrations, river hydrology, and sediment transfers. Such changes are negatively impacting riparian communities up to 1000 km away. Because many communities depend on the river and its resources for their food and livelihood, changes to the river have impacted, and will continue to negatively impact, food and economic security. While social and environmental impact assessments have been carried out for these projects, greater consideration of the scale and cumulative impacts of dams is necessary.

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