Journal ArticleDOI
Global river hydrography and network routing: baseline data and new approaches to study the world's large river systems
Bernhard Lehner,Günther Grill +1 more
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A new modeling framework that integrates hydrographic baseline data at a global scale with new modeling tools, specifically a river network routing model (HydroROUT) that is currently under development that is designed to provide an avenue for advanced hydro-ecological applications at large scales in a consistent and highly versatile way is presented.Abstract:
Despite significant recent advancements, global hydrological models and their input databases still show limited capabilities in supporting many spatially detailed research questions and integrated assessments, such as required in freshwater ecology or applied water resources management. In order to address these challenges, the scientific community needs to create improved large-scale datasets and more flexible data structures that enable the integration of information across and within spatial scales; develop new and advanced models that support the assessment of longitudinal and lateral hydrological connectivity; and provide an accessible modeling environment for researchers, decision makers, and practitioners. As a contribution, we here present a new modeling framework that integrates hydrographic baseline data at a global scale (enhanced HydroSHEDS layers and coupled datasets) with new modeling tools, specifically a river network routing model (HydroROUT) that is currently under development. The resulting ‘hydro-spatial fabric’ is designed to provide an avenue for advanced hydro-ecological applications at large scales in a consistent and highly versatile way. Preliminary results from case studies to assess human impacts on water quality and the effects of dams on river fragmentation and downstream flow regulation illustrate the potential of this combined data-and-modeling framework to conduct novel research in the fields of aquatic ecology, biogeochemistry, geo-statistical modeling, or pollution and health risk assessments. The global scale outcomes are at a previously unachieved spatial resolution of 500 m and can thus support local planning and decision making in many of the world's large river basins. Copyright © 2013 John Wiley & Sons, Ltd.read more
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Journal ArticleDOI
Integrating Perspectives to Understand Lake Ice Dynamics in a Changing World
Sapna Sharma,Michael F. Meyer,Joshua Culpepper,Joshua Culpepper,Xiao Yang,Stephanie E. Hampton,Stella A. Berger,Matthew R. Brousil,Steven C. Fradkin,Scott N. Higgins,Kathi Jo Jankowski,Georgiy Kirillin,Adrianne P. Smits,Emily C. Whitaker,Foad Yousef,Shuai Zhang +15 more
TL;DR: In this paper, the authors provide a primer on the predominant drivers of freshwater lake ice cover and the current methodologies used to study lake ice, including in situ and remote sensing observations, physical based models, and experiments.
Journal ArticleDOI
Threshold responses of riverine fish communities to land use conversion across regions of the world.
TL;DR: Threshold responses of community composition, such as those identified in this study, illustrate the need for globally coordinated efforts to prioritize country-specific management and policy initiatives that ensure that freshwater fish diversity is not inevitably loss in the future.
Journal ArticleDOI
Basin-scale impacts of hydropower development on the Mompós Depression wetlands, Colombia
Hector Angarita,Hector Angarita,A. J. Wickel,Jack Sieber,John Chavarro,Javier A. Maldonado-Ocampo,Guido A. Herrera-R,Guido A. Herrera-R,Juliana Delgado,David Purkey +9 more
TL;DR: In this article, the authors implemented an integrated approach focused on key attributes of medically functional floodplains, including hydrologic connectivity between the Magdalena River and the floodplain, and between upstream and downstream sections.
Journal ArticleDOI
Quantification of phytoplankton bloom dynamics by citizen scientists in urban and peri-urban environments.
Eva Pintado Castilla,Davi Gasparini Fernandes Cunha,Fred Wang-Fat Lee,Steven Loiselle,Kin Chung Ho,Charlotte Hall +5 more
TL;DR: The capacity of trained community members to assess elevated phytoplankton densities in urban and peri-urban freshwater ecosystems was examined to examine possible drivers of algal blooms.
Journal ArticleDOI
mizuRoute version 1: a river network routing tool for a continental domain water resources applications
Naoki Mizukami,Martyn P. Clark,Kevin Sampson,Bart Nijssen,Yixin Mao,Hilary McMillan,Hilary McMillan,Roland J. Viger,Steven L. Markstrom,Lauren E. Hay,Ross Woods,Jeffrey R. Arnold,Levi D. Brekke +12 more
TL;DR: The mizuRoute tool as mentioned in this paper postprocesses runoff outputs from any distributed hydrologic model or land surface model to produce spatially distributed streamflow at various spatial scales from headwater basins to continental-wide river systems.
References
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The River Continuum Concept
TL;DR: It is hypothesized that producer and consumer communities characteristic of a given river reach become established in harmony with the dynamic physical conditions of the channel.
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Network Flows: Theory, Algorithms, and Applications
TL;DR: In-depth, self-contained treatments of shortest path, maximum flow, and minimum cost flow problems, including descriptions of polynomial-time algorithms for these core models are presented.
Journal ArticleDOI
Global threats to human water security and river biodiversity
Charles J. Vörösmarty,Peter B. McIntyre,Peter B. McIntyre,Mark O. Gessner,David Dudgeon,Alexander A. Prusevich,Pamela A. Green,Stanley Glidden,Stuart E. Bunn,Caroline A Sullivan,C. Reidy Liermann,Peter Davies +11 more
TL;DR: The first worldwide synthesis to jointly consider human and biodiversity perspectives on water security using a spatial framework that quantifies multiple stressors and accounts for downstream impacts is presented.
Journal ArticleDOI
Global Water Resources: Vulnerability from Climate Change and Population Growth
TL;DR: Numerical experiments combining climate model outputs, water budgets, and socioeconomic information along digitized river networks demonstrate that (i) a large proportion of the world's population is currently experiencing water stress and (ii) rising water demands greatly outweigh greenhouse warming in defining the state of global water systems to 2025.
Journal ArticleDOI
Basic principles and ecological consequences of altered flow regimes for aquatic biodiversity.
Stuart E. Bunn,Angela Arthington +1 more
TL;DR: This literature review has focused this literature review around four key principles to highlight the important mechanisms that link hydrology and aquatic biodiversity and to illustrate the consequent impacts of altered flow regimes.