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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TLDR
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
Sensitivity of Water Balance in the Qaidam Basin to the Mid-Pliocene Climate
Xun Wang,Benjamin Schmidt,Marco Otto,Todd A. Ehlers,Sebastian G. Mutz,Svetlana Botsyun,Dieter Scherer +6 more
TL;DR: The Qaidam Basin (QB) in the northeastern Tibetan Plateau held a mega-lake system during the Pliocene epoch as discussed by the authors, and today, the lower elevations in the basin are hyperarid.
Journal ArticleDOI
How much inundation occurs in the Amazon River basin?
TL;DR: In this article , the authors present an intercomparison of 29 inundation datasets for the Amazon basin, based on remote sensing only, hydrological modeling, or multi-source datasets, with 18 covering the lowland Amazon basin (elevation <500 m), and 11 covering individual wetland complexes (subregional datasets).
Journal ArticleDOI
Global conservation status of the world's most prominent forage fishes (Teleostei: Clupeiformes)
Traci Birge,Gina M. Ralph,F. Di Dario,Thomas A. Munroe,R.W. Bullock,Sara M. Maxwell,Mudjekeewis D. Santos,H. Hata,Kent E. Carpenter +8 more
TL;DR: This article applied the IUCN Red List methodology, a comprehensive and systematic approach to assess extinction risk, to all clupeiform species and found that nearly 11% of species are of elevated conservation concern, although this could be as high as 36%.
Journal ArticleDOI
Systematic method for mapping fine-resolution water cover types in China based on time series Sentinel-1 and 2 images
TL;DR: Wang et al. as discussed by the authors proposed a comprehensive water cover classification system in terms of water sources, water body shapes, and water usage, including rivers, reservoirs, lakes, agricultural ponds, seasonal wetlands, and rice fields.
References
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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.
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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
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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.