Journal ArticleDOI
Projecting climate change impacts on stream flow regimes with tracer-aided runoff models - preliminary assessment of heterogeneity at the mesoscale
R. Capell,R. Capell,Doerthe Tetzlaff,Doerthe Tetzlaff,Richard Essery,Richard Essery,Chris Soulsby,Chris Soulsby +7 more
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In this article, tracer-aided conceptual runoff models were used to investigate the impacts of climate change on catchment hydrological function in a mesoscale catchment in northern Scotland.Abstract:
The northern mid-high latitudes form a region that is sensitive to climate change, and many areas already have seen – or are projected to see – marked changes in hydroclimatic drivers on catchment hydrological function In this paper, we use tracer-aided conceptual runoff models to investigate such impacts in a mesoscale (749 km2) catchment in northern Scotland The catchment encompasses both sub-arctic montane sub-catchments with high precipitation and significant snow influence and drier, warmer lowland sub-catchments We used downscaled HadCM3 General Circulation Model outputs through the UKCP09 stochastic weather generator to project the future climate This was based on synthetic precipitation and temperature time series generated from three climate change scenarios under low, medium and high greenhouse gas emissions Within an uncertainty framework, we examined the impact of climate change at the monthly, seasonal and annual scales and projected impacts on flow regimes in upland and lowland sub-catchments using hydrological models with appropriate process conceptualization for each landscape unit The results reveal landscape-specific sensitivity to climate change In the uplands, higher temperatures result in diminishing snow influence which increases winter flows, with a concomitant decline in spring flows as melt reduces In the lowlands, increases in air temperatures and re-distribution of precipitation towards autumn and winter lead to strongly reduced summer flows despite increasing annual precipitation The integration at the catchment outlet moderates these seasonal extremes expected in the headwaters This highlights the intimate connection between hydrological dynamics and catchment characteristics which reflect landscape evolution It also indicates that spatial variability of changes in climatic forcing combined with differential landscape sensitivity in large heterogeneous catchments can lead to higher resilience of the integrated runoff response Copyright © 2012 John Wiley & Sons, Ltdread more
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Stream water age distributions controlled by storage dynamics and nonlinear hydrologic connectivity: Modeling with high-resolution isotope data.
TL;DR: A new long‐term record of daily isotope measurements in precipitation and streamflow was used to calibrate and test a parsimonious tracer‐aided runoff model, well suited for constraining process‐based modeling in a range of northern temperate and boreal environments.
Journal ArticleDOI
Catchments on the cusp? Structural and functional change in northern ecohydrology
Doerthe Tetzlaff,Chris Soulsby,James M. Buttle,R. Capell,Sean K. Carey,Hjalmar Laudon,Jeffrey J. McDonnell,Jeffrey J. McDonnell,Kevin J. McGuire,Jan Seibert,Jan Seibert,Jamie Shanley +11 more
TL;DR: In this article, Tetzlaff et al. presented an analysis of the relationship between water security and water quality in the field of geology and water resources at the National Hydrology Research Centre at the University of Saskatchewan, Saskatchewan, Canada.
Journal ArticleDOI
Effect of climate change on runoff of Campylobacter and Cryptosporidium from land to surface water.
TL;DR: Climate change has little overall impact on runoff of Campylobacter and Cryptosporidium from land to the surface waters, and the net effect on the pathogen concentration in surface waters and consequently also on infection risks through recreation seems limited.
Journal ArticleDOI
An integrated Hydrological Model for Assessing Climate Change Impacts on Water Resources of the Upper Po River Basin
Giovanni Ravazzani,Secondo Barbero,Alessio Salandin,Alfonso Senatore,Marco Mancini,Marco Mancini +5 more
TL;DR: In this paper, an integrated model that can simulate mutual interactions between natural hydrological processes and anthropogenic disturbances is used to quantify the impacts of climate change on water resources availability in the Upper Po river basin in Italy.
Journal ArticleDOI
An assessment of the possible impacts of climate change on snow and peak river flows across Britain
TL;DR: In this article, a temperature-based snow module has been coupled with a grid-based distributed hydrological model, to improve simulations of river flows in upland areas of Britain subject to snowfall and snowmelt.
References
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Journal ArticleDOI
Potential impacts of a warming climate on water availability in snow-dominated regions
TL;DR: In a warmer world, less winter precipitation falls as snow and the melting of winter snow occurs earlier in spring, which leads to a shift in peak river runoff to winter and early spring, away from summer and autumn when demand is highest.
Journal ArticleDOI
Stationarity Is Dead: Whither Water Management?
Paul C.D. Milly,Julio L. Betancourt,Malin Falkenmark,Robert M. Hirsch,Dennis P. Lettenmaier,Ronald J. Stouffer +5 more
TL;DR: Climate change undermines a basic assumption that historically has facilitated management of water supplies, demands, and risks and threatens to derail efforts to conserve and manage water resources.
Journal ArticleDOI
A review of paired catchment studies for determining changes in water yield resulting from alterations in vegetation
TL;DR: In this paper, the authors focus on the use of paired catchment studies for determining the changes in water yield at various time scales resulting from permanent changes in vegetation and highlight the potential underestimation of water yield changes if regrowth experiments are used to predict the likely impact of permanent alterations to a catchment's vegetation.
Journal ArticleDOI
The Effects of Climate Change on the Hydrology and Water Resources of the Colorado River Basin
Niklas S. Christensen,Andrew W. Wood,Nathalie Voisin,Dennis P. Lettenmaier,Richard N. Palmer +4 more
TL;DR: The potential effects of climate change on the hydrology and water resources of the Colorado River basin are assessed by comparing simulated hydrologic and water resource scenarios derived from downscaled climate simulations of the U.S. Department of Energy/National Center for Atmospheric Research Parallel Climate Model (PCM) to scenarios driven by observed historical (1950-1999) climate as discussed by the authors.
Journal ArticleDOI
Threats to the running water ecosystems of the world
Björn Malmqvist,Simon D. Rundle +1 more
TL;DR: In this article, the authors reviewed long-term trends in the factors that currently impact running waters with the aim of predicting what the main threats to rivers will be in the year 2025, and concluded that the overriding pressure on running water ecosystems up to 2025 will stem from the predicted increase in the human population, with concomitant increases in urban development, industry, agricultural activities and water abstraction, diversion and damming.