Modelling the impacts of climate change on riverine thermal regimes in western Canada’s largest Pacific watershed

Islam, Siraj ul; Hay, Rachel W.; Déry, Stephen J.; Booth, Barry P.

doi:10.1038/s41598-019-47804-2

Cited by 47 publications

(36 citation statements)

References 50 publications

(69 reference statements)

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“…Nevertheless, the increases in the surface water temperature and depth average temperature in summer were relatively large (0.29°C/yr and 0.13°C/yr, respectively) with statistical significance (p < 0.05), which is thought to be because, due to the increased air temperature, factors such as solar radiation and tropical nights also affect heat energy transfer and accumulation in water bodies, and these effects are especially strong in lakes and other water bodies with long retention times [14]. Islam et al [51] used the Air2Stream model, which is a state-of-the-art hybrid river water temperature model relying on heat budgets with a similar formulation and approach as a lake surface temperature model, to investigate changes in air and water temperature between 1950 and 2015 at the Fraser River Basin in British Columbia, Canada, and reported that the summer water temperature increased by approximately 1°C in 17 rivers during this time. Kwak et al [52] modeled water temperature in the Fourchue River in Quebec, Canada using the CMIP5 climate model and RCP 2.6, 4.5, and 8.5 climate change scenarios, and predicted that median water temperatures in June would increase by 0.2-0.7°C, resulting in favorable temperatures for trout growth and altering the habitats of coldwater species.…”

Section: Comparison Of Air and Water Temperature Trends At Lakementioning

confidence: 98%

Long-term relationship between air and water temperatures in Lake Paldang, South Korea

Ryu

Park

et al. 2020

Environmental Engineering Research

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A long-term investigation into the relationship between air and water temperatures was conducted in Lake Paldang, which is the largest water source in South Korea, by studying hysteresis. From 1973 to 2018, the annual mean air temperature increased by 0.05°C/yr (seasonal Sen’s slope). The results of a numerical model (R > 0.86) showed that the ratios of the air and water temperatures increased (0.71‒0.77) in the rising limb and decreased (0.70‒0.76) in the falling limb. However, the intercept values were 0.13–3.52 and 6.62–7.78 in the rising and falling limbs, respectively, and hence there was a 4–5°C increase in temperature. In particular, in 2015, 2016, and 2018, the intercept values in the falling limb were ≥ 7, exhibiting hysteresis, whereby high water temperatures were slow to decline. Lake Paldang showed stronger water temperature hysteresis than its influent rivers and stream. The rising and falling limbs did not show a large difference in the extent of water temperature change (slope). However, the water temperature did not decrease rapidly, and the decrease continued for longer due to hysteresis, which is a type of inertia where the elevated temperature persists if the summer air temperature is significantly increased.

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Section: Comparison Of Air and Water Temperature Trends At Lakementioning

confidence: 98%

Long-term relationship between air and water temperatures in Lake Paldang, South Korea

Ryu

Park

et al. 2020

Environmental Engineering Research

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“…Water temperature (WT) is a good indicator of both changes in air temperature (AT) and ways of river supply (Bates et al, 2008;Ficklin et al, 2013;Goulden et al, 2009;Isaak et al, 2012;Koutsoyiannis and Montanari, 2007;Ul Islam et al, 2019;Zhu et al, 2018). Hydrological regime (river regime) is a characteristic, rhythmic course of hydrological phenomena in the river in the yearly cycle, established on the basis of many years of observation.…”

Section: Introductionmentioning

confidence: 99%

Temporal and spatial patterns of the river flow and water temperature relations in Poland

Wrzesiński

Graf

2022

Journal of Hydrology and Hydromechanics

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Main aim of the study was to determine the temporal and spatial patterns of relations between monthly and annual average river flow (RF) and water temperature (WT) for 53 rivers in Poland. The research made use of monthly and annual WT and RF for 88 water gauges for the period 1971–2015. Correlations were established using the Spearman’s rank correlation coefficient and the similarity of RF–WT relations was determined using the Ward’s hierarchical grouping. It was demonstrated that correlations between average annual RF and WT were negative (for >85% of water gauges) and statistically significant (p<0.05) only for 30% of water gauges. It was confirmed that the studied RF–WT relations underwent seasonal changes. Positive correlations were clearly predominant in the winter months, while from April to September these relations were negative and statistically significant. The RF–WT relations were also characterized by spatial differences and this had been confirmed by separation of seven groups of water gauge profiles distinguished with the help of the Ward’s hierarchical grouping method. The strongest RF–WT relations were apparent in the case of mountainous rivers, for which snow melt supply and summer rainfall supply were predominant, and lakeland rivers, which had a considerable share of groundwater supply. These were classified as cold rivers, as opposed to the cool rivers in the lowland belt, for which the RF–WT relations were the weakest. The results obtained may contribute to the elaboration of an appropriate management strategy for river ecosystems, which are assigned important economic and environmental functions.

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“…In consequence, water temperature studies are of great practical importance, as optimization and appropriate management of fisheries requires determining both spatial and temporal water temperature dynamics, particularly in streams inhabited by ecologically valuable fish species (Malcolm et al 2008;Broadmeadow et al 2011). Apart from issues associated with fisheries and aquatic ecology water temperature was commonly used in recent years as a climate change indicator (Isaak et al 2012;Ficklin et al 2013;Ul Islam et al 2019), as well as a tracer of groundwater flow patterns (Anderson 2015). Finally, temperature monitoring seems to be highly valuable in the case of rivers and streams flowing in the proximity of sprawling urbanized areas, where changes in thermal characteristics can be used in the evaluation of future anthropopressure.…”

Section: Introductionmentioning

confidence: 99%

The effect of environmental drivers on summer spatial variability of water temperature in Polish lowland watercourses

Łaszewski

2020

Environ Earth Sci

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Thermal properties of streams and rivers, due to significant impact on biota and other physico-chemical water properties, were broadly recognized in hydrological literature last years. Nevertheless, water temperature of temperate lowland watercourses has received relatively small attention, despite the development of new measurement devices and techniques. Thus, the current study attempt to document spatial water temperature variability of lowland watercourses and examined the effects of environmental drivers on their thermal heterogeneity. For this purpose, water temperature was monitored from May to October 2017 with the use of digital data loggers in 20 sites located in central Poland, representing two spatial scales-main rivers (MR) and tributaries (TR). On the basis of the measurement data, statistical distribution of magnitude and variability water temperature parameters was presented, whereas cluster analysis (Ward method) was used to group sites similar in their thermal properties. Furthermore, selected catchment and channel metrics were computed using GIS software for each site, which in combine with the principal component analysis allowed to assess the effect of such metrics on thermal parameters. Then, to support the findings of PCA and assess meteorological dependence of the water temperature, linear regression between daily mean water and air temperatures was performed. The results indicate that in terms of magnitude and variability parameters TR scale sites demonstrated clear thermal heterogeneity, particularly in comparison to MR sites, characterized by similar thermal properties even between separate, independent catchments; in such sites the highest thermal contrast were related to anthropogenic impacts, such as reservoir releases and sewage inflows. Clear longitudinal zonation of water temperature parameters was found as presented by first two principal components, which was related to transition from small headwater sites to the largest, downstream catchments, driven mainly by changes of catchment area, mean slope, and width:depth ratio. The increase of the catchment area also resulted in a shift in linear regression parameters, which suggested higher meteorological control in the downstream direction and simultaneously, lower impacts of groundwater inflows. The obtained results provide new insight into lowland watercourses temperature behavior, being of primary significance in the context of fisheries and environmental management, particularly in the face of climate warming and increasing anthropopressure.

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Modelling the impacts of climate change on riverine thermal regimes in western Canada’s largest Pacific watershed

Cited by 47 publications

References 50 publications

Long-term relationship between air and water temperatures in Lake Paldang, South Korea

Long-term relationship between air and water temperatures in Lake Paldang, South Korea

Temporal and spatial patterns of the river flow and water temperature relations in Poland

The effect of environmental drivers on summer spatial variability of water temperature in Polish lowland watercourses

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