Modeling Hydrodynamic and Water Quality Processes in a Reservoir

Ji, Zhen‐Gang; Morton, Michael R.; Hamrick, John M.

doi:10.1061/40734(145)38

Cited by 11 publications

(4 citation statements)

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“…Accordingly, the higher May mean wind speeds (over the years in which VHOD calculations were possible) may have led to enhanced vertical transport of DO, replenishment of hypolimnetic DO resources and, consequently, a lower rate of DO depletion. The influence of wind has been observed elsewhere, with Ji, Morton & Hamrick (2004) reporting that wind forcing was one of the major hydrodynamic processes controlling hypolimnetic DO depletion in a North American lake. The rates of vertical DO transport over the VHOD period were not used to confirm the wind effect because of the degree of error associated with the calculations during early stratification when the thermal gradient in the water column was relatively weak.…”

Section: Discussionmentioning

confidence: 78%

Long-term changes in oxygen depletion in a small temperate lake: effects of climate change and eutrophication

Foley¹,

et al. 2011

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1. We analysed 41 years of data from Blelham Tarn, U.K., to determine the consequences of eutrophication and climate warming on hypolimnetic dissolved oxygen (DO). 2. The establishment of thermal stratification was strongly related to the onset of DO depletion in the lower hypolimnion. As a result of a progressively earlier onset of stratification and later overturn, the duration of stratification increased by 38 ± 8 days over the 41 years. 3. The observed rate of volumetric hypolimnetic oxygen depletion (VHOD obs ) ranged from 0.131 to 0.252 g O 2 m )3 per day and decreased significantly over the study period, despite the increase in the mean chlorophyll a (Chl a) concentration in the growing season. The vertical transport of DO represented from 0 to 30% of VHOD obs , while adjustments for interannual differences in hypolimnetic temperature were less important, ranging from )11 to 9% of VHOD obs . 4. The mean wind speed during May made the strongest significant contribution to the variation in VHOD obs . VHOD obs adjusted for the vertical transport of DO and hypolimnetic temperature differences, VHOD adj , was significantly related to the upper mixed layer Chl a concentration during spring. 5. Hypolimnetic anoxia (HA) ranged from 27 to 168 days per year and increased significantly over time, which undoubtedly had negative ecological consequences for the lake. 6. In similar small temperate lakes, the negative effects of eutrophication on hypolimnetic DO are likely to be exacerbated by changes in lake thermal structure brought about by a warming climate, which may undermine management efforts to alleviate the effects of anthropogenic eutrophication.

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Section: Discussionmentioning

confidence: 78%

Long-term changes in oxygen depletion in a small temperate lake: effects of climate change and eutrophication

Foley¹,

et al. 2011

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“…Additionally EFDC has been utilised for hydrodynamic and water quality studies in the Asia Pacific, including the Yellow Sea between mainland China and the Korean Penisula (Luo & Li, 2009), Kwang-Yang Bay, Korea (Park et al, 2005) and the Tasman/Golden Bay system in New Zealand (Tuckey, et, al., 2006). The modelling package is capable of simulating one or multidimensional flow, transport and bio-geochemical processes in a variety of aquatic systems and has been successfully applied to lakes, rivers, reservoirs, estuaries, coastal lagoons, bays and wetlands (Hamrick, 1992b;Zarillo and Surak, 1995;Yang, 1996;Kuo et al, 1996;Zarillo, 1998;Shen et al, 1999;Ji et al, 2000;Lin and Kuo, 2003;Shen and Haas, 2004;Park et al, 2005;Shen and Lin, 2006;Lin et al, 2007Lin et al, , 2008aXu et al, 2008;Liu et al, 2009;Huang et al, 2009). EFDC has the capacity to model eutrophication processes, sediment transport and fate of dissolved and particulate phases of contaminants.…”

Section: Cross-sectional Discharge and Current Speed Measurementsmentioning

confidence: 99%

Field and modelling investigations of fresh-water plume behaviour in response to infrequent high-precipitation events, Sydney Estuary, Australia

Lee

Birch

Lemckert

2011

Estuarine, Coastal and Shelf Science

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“…EFDC solves the vertically hydrostatic equations for turbulent flow for a variable-density fluid (including salinity and temperature dependencies). EFDC is a widely used modeling framework that has been applied in a variety of surface-water studies (Ji 2017), including several reservoirs throughout the southern United States (Ji et al 2004;Elçi et al 2007;Dynamic Solutions 2013).…”

Section: Methodsmentioning

confidence: 99%

Hydrodynamic Modeling Results Showing the Effects of the Luce Bayou Interbasin Transfer on salinity in Lake Houston, TX

Smith

Shah

2020

Texas Water Journal

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An over-reliance on groundwater resources in the Houston (Texas) metropolitan area led to aquifer drawdowns and land subsidence, so regional water suppliers have been turning to surface water resources to meet water demand. Lake Houston, an important water supply reservoir 25 miles northeast from downtown Houston, requires new water supply sources to continue to meet water supply demands for the next several decades. The upcoming Luce Bayou Interbasin Transfer Project will divert up to 500 million gallons per day of Trinity River water into Lake Houston. Trinity River water has significantly different water quality than the Lake Houston tributaries. To evaluate the project's impact on water quality, the U.S. Geological Survey used an enhanced version of a previously released Lake Houston hydrodynamic model. With a focus on salinity and water-surface elevations, the model combined data from 2009-2017 with simulated flow from the Luce Bayou Interbasin Transfer to evaluate potential outcomes from three hypothetical flow scenarios. Overall, these scenarios found that the Luce Bayou Interbasin Transfer would cause salinities to rise over most of the modeled time (2009-2017), although salinities were buffered under 2011 drought conditions. Large inflow events equalized salinities under baseline conditions as well as the enhanced flow scenarios. Citation: Smith EA, Shah S. 2020. Hydrodynamic modeling results showing the effects of the Luce Bayou Interbasin Transfer on salinity in Lake Houston, TX. Texas Water Journal. 11(1):64-88. Available from: https://doi.org/10.21423/twj.v11i1.7094.

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Modeling Hydrodynamic and Water Quality Processes in a Reservoir

Cited by 11 publications

References 0 publications

Long-term changes in oxygen depletion in a small temperate lake: effects of climate change and eutrophication

Long-term changes in oxygen depletion in a small temperate lake: effects of climate change and eutrophication

Field and modelling investigations of fresh-water plume behaviour in response to infrequent high-precipitation events, Sydney Estuary, Australia

Hydrodynamic Modeling Results Showing the Effects of the Luce Bayou Interbasin Transfer on salinity in Lake Houston, TX

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