River temperature modelling: A review of process-based approaches and future directions

Dugdale, Stephen J.; Hannah, David M.; Malcolm, I. A.

doi:10.1016/j.earscirev.2017.10.009

Cited by 146 publications

(131 citation statements)

References 145 publications

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“…Previous data limitations have not constrained the number of studies that address temperatures in lotic systems, which is a popular topic with reviews common in both the physical science (Webb et al 2008; Gallice et al 2015; Dugdale et al 2017) and ecological literatures (Ward 1985; Poole and Berman 2001; Caissie 2006; Olden and Naiman 2010; Steel et al 2017). By necessity, however, a primary focus has often been the description and modeling of thermal characteristics at a small number of sites or across areas of limited geographic extent.…”

Section: Introductionmentioning

confidence: 99%

Thermal Regimes of Perennial Rivers and Streams in the Western United States

Isaak

Luce

Horan

et al. 2020

J American Water Resour Assoc

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Thermal regimes of rivers and streams profoundly affect aquatic ecosystems, but are poorly described and classified in many areas due to the limited availability of annual datasets from extensive and representative monitoring networks. By mining a new temperature database composed of >23,000 site records that spans the western United States (U.S.), we extract annual monitoring records at 578 sites on perennial streams to describe regimes in this diverse region. Records were summarized using 34 metrics that described regime aspects related to magnitude, variation, frequency, duration, and timing. The metrics were used in a multivariate cluster analysis to classify streams into seven distinct regime types and in a principal components analysis (PCA) to examine patterns of redundancy among metrics. The PCA indicated that 2-5 orthogonal PC axes accounted for 74%-89% of the variation in thermal regimes at the monitoring sites. Most of the variation in PC scores that defined the two dominant axes was in turn predictable from a suite of geospatial covariates in multiple linear regressions that included elevation, latitude, riparian canopy density, reach slope, precipitation, lake prevalence, and dam height. Our results have parallels to previous flow regime analyses that describe the utility of small numbers of PCs or allied metrics in regime characterization, and can be used to better understand and parsimoniously represent thermal regimes in the western U.S.

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Section: Introductionmentioning

confidence: 99%

Thermal Regimes of Perennial Rivers and Streams in the Western United States

Isaak

Luce

Horan

et al. 2020

J American Water Resour Assoc

View full text Add to dashboard Cite

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“…Water temperatures exert a primary control on river ecosystem function with influences on habitat suitability (e.g., Boisneau et al, ) and growth rates (e.g., Deegan et al, ; Nicieza & Metcalfe, ) for aquatic species, as well as physical (Arp et al, ; Merck & Neilson, ; Pohl et al, ; Rawlins et al, ; Syvitski, ) and chemical (Cory et al, ; McNamara et al, ) river processes. Given the ecological importance of river temperature, understanding the controlling heat fluxes is key to effective river management (Dugdale et al, ; Hannah & Garner, ; Poole & Berman, ). This can be even more important in a changing climate where energy balances can shift (Caldwell et al, ; Luce et al, ; Muñoz‐Mas et al, ; van Vliet et al, ) and has already been shown to impact some rivers (e.g., Isaak et al, ).…”

Section: Introductionmentioning

confidence: 99%

Quantifying Reach‐Average Effects of Hyporheic Exchange on Arctic River Temperatures in an Area of Continuous Permafrost

King

Neilson

2019

Water Resources Research

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Hyporheic exchange has the potential to significantly influence river temperatures in regions of continuous permafrost under low‐flow conditions given the strong thermal gradients that exist in river bed sediments. However, there is limited understanding of the impacts of hyporheic exchange on Arctic river temperatures. To address this knowledge gap, heat fluxes associated with hyporheic exchange were estimated in a fourth‐order Arctic river using field observations coupled with a river temperature model that accounts for hyporheic exchange influences. Temperature time series and tracer study solute breakthrough curves were measured in the main channel and river bed at multiple locations and depths to characterize hyporheic exchange and provide parameter bounds for model calibration. Model results for low‐flow periods from 3 years indicated that hyporheic exchange contributed up to 27% of the total river energy balance, reduced the main channel diel temperature range by up to 1.7 °C, and reduced mean daily temperatures by up to 0.21 °C over a 13.1‐km study reach. These influences are due to main channel heat loss during the day and gain at night via hyporheic exchange and heat loss from the hyporheic zone to the ground below via conduction. Main channel temperatures were found to be sensitive to simulated changes in ground temperatures due to changes in hyporheic exchange heat flux and deeper ground conduction. These results suggest that the moderating influence of hyporheic exchange could be reduced if ground temperatures warm in response to projected increases in permafrost thaw below rivers.

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“…Stream temperature is an aggregate of conductive, convective and advective fluxes between water column, stream bed, hyporheic zone, groundwater, seeps of varying origin, shade and substrate type (Webb and Zhang 1997;Johnson 2004;Guenther et al 2014;Fullerton et al 2015). The dominant process influencing stream temperature is solar loading (Brown 1969;Torgersen et al 2001;Mayer 2012;Dugdale et al 2017;Dugdale et al 2018;Loicq et al 2018). A barrier to solar loading such as riparian vegetation or topographic shading reduces stream temperature (Bond et al 2015;Kalny et al 2017;Wawrzyniak et al 2017).…”

Section: Hydroclimate Impacts From Fog and Low Cloudsmentioning

confidence: 99%

Hydrologic Resilience from Summertime Fog and Recharge: A Case Study for Coho Salmon Recovery Planning

Torregrosa

Flint

2019

J American Water Resour Assoc

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Research Impact Statement: Coastal fog and recharge strongly influence late summer instream hydroclimate conditions critical to coho and help to identify watersheds least vulnerable to future warming.ABSTRACT: Fog and low cloud cover (FLCC) and late summer recharge increase stream baseflow and decrease stream temperature during arid Mediterranean climate summers, which benefits salmon especially under climate warming conditions. The potential to discharge cool water to streams during the late summer (hydrologic capacity; HC) furnished by FLCC and recharge were mapped for the 299 subwatersheds ranked Core, Phase 1, or Phase 2 under the National Marine Fisheries Service Recovery Plan that prioritized restoration and threat abatement action for endangered Central California Coast Coho Salmon evolutionarily significant unit. Two spatially continuous gridded datasets were merged to compare HC: average hrs/day FLCC, a new dataset derived from a decade of hourly National Weather Satellite data, and annual average mm recharge from the USGS Basin Characterization Model. Two use-case scenarios provide examples of incorporating FLCC-driven HC indices into long-term recovery planning. The first, a thermal analysis under future climate, projected 65% of the watershed area for 8-19 coho population units as thermally inhospitable under two global climate models and identified several units with high resilience (high HC under the range of projected warming conditions). The second use case investigated HC by subwatershed rank and coho population, and identified three population units with high HC in areas ranked Phase 1 and 2 and low HC in Core. Recovery planning for cold-water fish species would benefit by including FLCC in vulnerability analyses.(

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River temperature modelling: A review of process-based approaches and future directions

Cited by 146 publications

References 145 publications

Thermal Regimes of Perennial Rivers and Streams in the Western United States

Thermal Regimes of Perennial Rivers and Streams in the Western United States

Quantifying Reach‐Average Effects of Hyporheic Exchange on Arctic River Temperatures in an Area of Continuous Permafrost

Hydrologic Resilience from Summertime Fog and Recharge: A Case Study for Coho Salmon Recovery Planning

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