Effects of Water Level Fluctuation and Short-Term Climate Variation on Thermal and Stratification Regimes of a British Columbia Reservoir and Lake

Nowlin, Weston H.; Davies, John-Mark; Nordin, Rick; Mazumder, Asit

doi:10.1080/07438140409354354

Cited by 64 publications

(40 citation statements)

References 33 publications

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“…If we treat the lake or reservoir as a control volume, the thermodynamics is mainly governed by meteorological conditions that determine the surface heat flux [16][17][18][19][20], the heat exchange with sediment bed, and the inflows and outflows of the reservoir [21][22][23][24]. A reservoir differs from a natural lake due to its dynamic outflows associated with reservoir regulation [12,[24][25][26][27][28][29]. A reservoir typically has inflows varying with the season (dry or wet periods).…”

Section: Introductionmentioning

confidence: 99%

Understanding the Temperature Variations and Thermal Structure of a Subtropical Deep River-Run Reservoir before and after Impoundment

Xie

Liu

Fang

et al. 2017

Water

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A two-dimensional hydrodynamic CE-QUAL-W2 model was configured for a deep subtropical river-run reservoir, the Xiluodu Reservoir (XLDR), in China to simulate water temperature in the first two years of impoundment (2013)(2014) using measured data as model input. It was calibrated using observed temperature profiles near the dam and the outflow temperatures. Observed daily temperatures at four gauging stations upstream or downstream of XLDR before (2000)(2001)(2002)(2003)(2004)(2005)(2006)(2007)(2008)(2009)(2010)(2011)(2012) and after the impoundment (4 May 2013) were analyzed and fitted with a sine function representing seasonal temperature variation. The fitted annual temperature phase shifts showed no phase delay in XLDR area before the impoundment but revealed a phase delay about 17 days between outflow and inflow after the impoundment, which was not caused by the air temperature variation. The simulated temperatures verified a similar phase delay after the impoundment. The simulated temperatures, water ages, and vertical temperature gradients demonstrated an average metalimnetic deepening rate of 0.49 m/day (average inflow~4500 m 3 /s) while the largest rate due to massive inflow (~15,000 m 3 /s) was 1.67 m/day. The W2 model was run under hypothetic scenarios of different inflow/outflow rates and outflow withdrawn elevations. The results revealed that greater inflow/outflow rate could lead to higher metalimnetic deepening rate and smaller outflow phase delay, while deeper outflow withdrawn could lead to deeper metalimnion and larger epilimnetic depth.

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Section: Introductionmentioning

confidence: 99%

Understanding the Temperature Variations and Thermal Structure of a Subtropical Deep River-Run Reservoir before and after Impoundment

Xie

Liu

Fang

et al. 2017

Water

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“…The littoral zone tends to be more productive than the pelagic zone (Wetzel, 2001). In deeper lakes, which are defined as water bodies deep enough to stratify (Zohary and Ostrovsky, 2011), effects of excessive water level fluctuations may not be as noticeable as in shallow lakes, with visible changes only evident in the littoral zone (Nowlin et al, 2004). However, littoral zone changes can noticeably affect the pelagic zone (Zohary and Ostrovsky, 2011).…”

Section: Introductionmentioning

confidence: 99%

Trophic state categorisation and assessment of water quality in Manjirenji Dam, Zimbabwe, a shallow reservoir with designated multi-purpose water uses

Utete¹,

Tsamba²

2017

WSA

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“…Water level fluctuation is a key component of hydrology, especially in shallow lakes and wetlands [3,4]. The extent, frequency, and duration of water level fluctuations play an important role in regulating physical processes in lakes [5] and provide alternating habitats suitable for aquatic and terrestrial plants [6].…”

Section: Introductionmentioning

confidence: 99%

Lake Fluctuation Effectively Regulates Wetland Evapotranspiration: A Case Study of the Largest Freshwater Lake in China

Zhao

Liu

2014

Water

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Lakes and wetlands provide valuable water resources. Wetland evapotranspiration (ET) is a key hydrologic component; however, the effects of lake fluctuation on wetland ET remain unclear. The Poyang Lake is the largest freshwater lake in China and experiences a dramatic fluctuation in water level and inundated area. This study used remote sensing data to estimate the wetland ET for Poyang Lake and to illustrate the distribution of wetland ET and its response to lake fluctuations. Our results showed that wetland ET was related to lake fluctuation both spatially and temporally. Within the same year, the difference between annual water evaporation (E water ) and wetland ET (ET wetland ) was primarily attributed to lake fluctuation through its effects on inundated area and exposure days. A 1% increase in inundated area would result in a 7.87 ± 1.13 mm a −1 reduction in annual E water -to-ET wetland differences, and a 10-day elongation of exposure could lead to an 11.1 ± 1.6 mm a −1 increase in annual E water -to-ET wetland differences, on average. Inter-annually, the E water -to-ET wetland differences were attributed to the combined effects of atmospheric and environmental variables and lake fluctuation. The lake fluctuation contributed 73% to the inter-annual ET difference, followed by relative humidity (19%), net radiation (5%), and wind speed (4%). Overall, lake fluctuation effectively regulates wetland ET, and its effect should receive careful consideration in hydrological and water resources studies under the current changing climate.

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Effects of Water Level Fluctuation and Short-Term Climate Variation on Thermal and Stratification Regimes of a British Columbia Reservoir and Lake

Cited by 64 publications

References 33 publications

Understanding the Temperature Variations and Thermal Structure of a Subtropical Deep River-Run Reservoir before and after Impoundment

Understanding the Temperature Variations and Thermal Structure of a Subtropical Deep River-Run Reservoir before and after Impoundment

Trophic state categorisation and assessment of water quality in Manjirenji Dam, Zimbabwe, a shallow reservoir with designated multi-purpose water uses

Lake Fluctuation Effectively Regulates Wetland Evapotranspiration: A Case Study of the Largest Freshwater Lake in China

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