Stream Temperature Impacts Because of Changes in Air Temperature, Land Cover and Stream Discharge: Navarro River Watershed, California, USA

Woltemade, Christopher J.; Hawkins, Timothy W.

doi:10.1002/rra.3043

Cited by 29 publications

(21 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…We did not specifically analyze changes in thermal regimes in streams that are currently well shaded. However, comparing mature riparian forest scenarios under base case and +4°C air temperature scenarios suggests that increases in air temperatures would increase stream temperatures in streams that are currently well shaded, a result that agrees well with Woltemade and Hawkins (2016). Further, we would expect that disturbances, such as wildfire, that can substantially reduce shade could lead to large increases in stream temperatures if shade was removed over large segments of a stream's length.…”

Section: Future Thermal Regimes Under a Warmer Climatesupporting

confidence: 58%

“…However, comparing mature riparian forest scenarios under base case and +4°C air temperature scenarios suggests that increases in air temperatures would increase stream temperatures in streams that are currently well shaded, a result that agrees well with Woltemade and Hawkins (2016). However, comparing mature riparian forest scenarios under base case and +4°C air temperature scenarios suggests that increases in air temperatures would increase stream temperatures in streams that are currently well shaded, a result that agrees well with Woltemade and Hawkins (2016).…”

Section: Future Thermal Regimes Under a Warmer Climatementioning

confidence: 53%

See 1 more Smart Citation

What Matters Most: Are Future Stream Temperatures More Sensitive to Changing Air Temperatures, Discharge, or Riparian Vegetation?

Wondzell

Diabat

Haggerty

2018

J American Water Resour Assoc

View full text Add to dashboard Cite

Simulations of stream temperatures showed a wide range of future thermal regimes under a warming climate — from 2.9°C warmer to 7.6°C cooler than current conditions — depending primarily on shade from riparian vegetation. We used the stream temperature model, Heat Source, to analyze a 37‐km study segment of the upper Middle Fork John Day River, located in northeast Oregon, USA. We developed alternative future scenarios based on downscaled projections from climate change models and the composition and structure of native riparian forests. We examined 36 scenarios combining future changes in air temperature (ΔTair = 0°C, +2°C, and +4°C), stream discharge (ΔQ = −30%, 0%, and +30%), and riparian vegetation (post‐wildfire with 7% shade, current vegetation with 19% shade, a young‐open forest with 34% shade, and a mature riparian forest with 79% effective shade). Shade from riparian vegetation had the largest influence on stream temperatures, changing the seven‐day average daily maximum temperature (7DADM) from +1°C to −7°C. In comparison, the 7DADM increased by 1.4°C with a 4°C increase in air temperature and by 0.7°C with a 30% change in discharge. Many streams throughout the interior western United States have been altered in ways that have substantially reduced shade. The effect of restoring shade could result in future stream temperatures that are colder than today, even under a warmer climate with substantially lower late‐summer streamflow.

show abstract

Section: Future Thermal Regimes Under a Warmer Climatesupporting

confidence: 58%

Section: Future Thermal Regimes Under a Warmer Climatementioning

confidence: 53%

What Matters Most: Are Future Stream Temperatures More Sensitive to Changing Air Temperatures, Discharge, or Riparian Vegetation?

Wondzell

Diabat

Haggerty

2018

J American Water Resour Assoc

View full text Add to dashboard Cite

show abstract

“…ater temperature is of considerable importance with respect to physical and biological conditions, and chemical processes within river systems (Blaen et al, 2012;Dickson et al, 2012;Fellman et al, 2014;Woltemade and Hawkins, 2016;Yang et al, 2014). As a result of this the impact stream temperatures will have on downstream fisheries, specifically Salmonids has been thoroughly researched (Brittain and Milner, 2001;Brown et al, 2004;2006a;Hannah et al, 2004).…”

Section: Part Imentioning

confidence: 99%

“…Alpine streams are dominated by steep gradients (Smith et al, 2001). Locational factors are known to hold significant control over solar radiation receipts above the stream; a major site factor is local topographic shading (Woltemade and Hawkins, 2016). As a parcel of water moves through the river system, it will be heated by the friction along the streambed.…”

Section: Topographicmentioning

confidence: 99%

Meltwater temperature in streams draining Alpine glaciers

Williamson

Entwistle

Collins

2019

Science of The Total Environment

View full text Add to dashboard Cite

Thermal conditions in river water are of importance as they influence water quality, chemical processes, ecology, and biological conditions in rivers. In meltwater streams draining from Alpine glaciers, temperatures measured close to glacier termini show strong diurnal variation and paradoxical seasonal variation, being cool when energy availability is greatest. This thesis aims to describe temporal variations of water temperatures in five glacier-fed streams, which drain catchments of varying percentage glacierisation, in the Swiss Alps. Contrasting patterns of ablation season meltwater temperatures, and influences of basin characteristics and river channel morphology on water temperature are assessed. Relationships between solar radiation, air temperature, and water temperature were also investigated. A model was developed in order to estimate the impact of glacier recession on meltwater temperature. Observed temperatures in the Findelenbach during one ablation season were used to calibrate the model, which was subsequently validated on other years. Paucity of data in mountainous regions necessitated a model that required few measured variables to be developed. Distinctive seasonal water temperature regime was identified for larger rivers which drain relatively steep catchments, with substantial basin ice coverage. Such a regime is not replicated in streams draining smaller glaciers with lower gradients. Patterns in diurnal ranges of temperature in rivers draining large glaciers have been identified, temperature ranges reducing during days with high radiation and rising riverflows. Stream surface area was found to be the main catchment characteristic influencing temperature in glacier-fed rivers. Measured stream albedo values suggest that surface reflectivity is unlikely to be a major control on water temperature. Stream temperatures simulated by the model demonstrate high fidelity to those measured in the field. The temperature of glacier-fed streams will increase as climate warms as the distance over which heating can occur will lengthen as glaciers retreat, despite volume of flow being augmented by the deglaciation discharge dividend.

show abstract

“…In addition, the relationship between the changes in streamflow to water temperature and DO concentration were presented using the regression model. The aim was to observe whether climate change can influence the interaction between the streamflow with water temperature and DO concentration in the tropical climate because studies suggested that stream temperatures in the moderate flow conditions were cooler than under low flow conditions [47]. Finally, the interaction between land-use and climate change was evaluated using tributary (small) rivers in the watershed (Sengkang, Senai and Melana rivers) and a graphical plot of their relationship was produced.…”

Section: Evaluation Of Scenariosmentioning

confidence: 99%

Predicting Impact of Climate Change on Water Temperature and Dissolved Oxygen in Tropical Rivers

Bello

Hashim

Haniffah

2017

Climate

View full text Add to dashboard Cite

Predicting the impact of climate change and human activities on river systems is imperative for effective management of aquatic ecosystems. Unique information can be derived that is critical to the survival of aquatic species under dynamic environmental conditions. Therefore, the response of a tropical river system under climate and land-use changes from the aspects of water temperature and dissolved oxygen concentration were evaluated. Nine designed projected climate change scenarios and three future land-use scenarios were integrated into the Hydrological Simulation Program FORTRAN (HSPF) model to determine the impact of climate change and land-use on water temperature and dissolved oxygen (DO) concentration using basin-wide simulation of river system in Malaysia. The model performance coefficients showed a good correlation between simulated and observed streamflow, water temperature, and DO concentration in a monthly time step simulation. The Nash-Sutcliffe Efficiency for streamflow was 0.88 for the calibration period and 0.82 for validation period. For water temperature and DO concentration, data from three stations were calibrated and the Nash-Sutcliffe Efficiency for both water temperature and DO ranged from 0.53 to 0.70. The output of the calibrated model under climate change scenarios show that increased rainfall and air temperature do not affects DO concentration and water temperature as much as the condition of a decrease in rainfall and increase in air temperature. The regression model on changes in streamflow, DO concentration, and water temperature under the climate change scenarios illustrates that scenarios that produce high to moderate streamflow, produce small predicted change in water temperatures and DO concentrations compared with the scenarios that produced a low streamflow. It was observed that climate change slightly affects the relationship between water temperatures and DO concentrations in the tropical rivers that we include in this study. This study demonstrates the potential impact of climate and future land-use changes on tropical rivers and how they might affect the future ecological systems. Most rivers in suburban areas will be ecologically unsuitable to some aquatic species. In comparison, rivers surrounded by agricultural and forestlands are less affected by the projected climate and land-uses changes. The results from this study provide a basis in which resource management and mitigation actions can be developed.

show abstract

Stream Temperature Impacts Because of Changes in Air Temperature, Land Cover and Stream Discharge: Navarro River Watershed, California, USA

Cited by 29 publications

References 51 publications

What Matters Most: Are Future Stream Temperatures More Sensitive to Changing Air Temperatures, Discharge, or Riparian Vegetation?

What Matters Most: Are Future Stream Temperatures More Sensitive to Changing Air Temperatures, Discharge, or Riparian Vegetation?

Meltwater temperature in streams draining Alpine glaciers

Predicting Impact of Climate Change on Water Temperature and Dissolved Oxygen in Tropical Rivers

Contact Info

Product

Resources

About