Temperature and oxygen in Missouri reservoirs

Jones, John R.; Knowlton, Matthew F.; Obrecht, Daniel V.; Graham, Jennifer L.

doi:10.1080/07438141.2011.583713

Cited by 27 publications

(19 citation statements)

References 31 publications

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“…The presence of stratification can limit the transfer of oxygen within the water column and lead to anoxic conditions near the bottom. This process is often responsible for increasing eutrophication through release of phosphorus and ammonia from bottom sediments (Dodson, 2005;Elci, 2008;Escobar et al, 2009;Jones et al, 2011). The timing and magnitude of phytoplankton blooms are closely related to the temporal and spatial features of stratification.…”

Section: Introductionmentioning

confidence: 99%

Recycling Irrigation Reservoir Stratification and Implications for Crop Health and Production

Zhang

Richardson

Belayneh

et al. 2016

J American Water Resour Assoc

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Recycling irrigation reservoirs (RIRs) are an emerging aquatic ecosystem and water resource of global significance. This study investigated the vertical distribution of water temperature, dissolved oxygen (DO), and pH in eight RIRs at two nurseries each in Virginia and Maryland from 2011 to 2014. Monomictic thermal stratification was observed from April to October in all RIRs, despite their shallow depths (0.75-3.89 m). The strongest stratification had a top-bottom temperature difference of 21.53°C. The top-bottom temperature difference was positively correlated with water column depth, air temperature, and daily light integral (p < 0.05). Wind speed did not impact the thermal stratification, likely due to their relatively small surface areas. Thermal stratification affected the vertical distribution of DO and pH. The top-bottom differences in DO and pH were greater during stratification periods than nonstratification periods. Water pH in all RIRs was higher at the top than at the bottom with the greatest difference of 4.16 units. Discovery and characterization of thermal stratification in RIRs helps understand water quality dynamics in this novel ecosystem and promote safe and productive water reuse for irrigation. Specifically, water withdrawal depths should be adjusted according to variations in temperature, DO, and pH during the stratification and nonstratification periods to mitigate pathogen risk and improve water treatment efficacy and crop production.(KEY TERMS: recycling irrigation reservoir; thermal stratification; recycled water quality; dissolved oxygen; pH; water management.)

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Section: Introductionmentioning

confidence: 99%

Recycling Irrigation Reservoir Stratification and Implications for Crop Health and Production

Zhang

Richardson

Belayneh

et al. 2016

J American Water Resour Assoc

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“…Although the profound effects of water temperature, thermal structure, and stratification on the physical, chemical, and biological characteristics of many deep lakes are well known, few studies have quantified such effects in reservoirs (Becker et al 2009;Jones et al 2011;Wang et al 2012). Many reservoirs in China supply the water for industry, agriculture, and residential drinking water.…”

mentioning

confidence: 99%

Thermal structure and response to long‐term climatic changes in Lake Qiandaohu, a deep subtropical reservoir in China

Zhang

Liu

et al. 2014

Limnology & Oceanography

130

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Using the vertical temperature profiles of Lake Qiandaohu from January 2010 to April 2013, we evaluated the monthly and seasonal variations of water temperature and thermocline parameters, and developed empirical models among thermocline depth (TD), thickness (TT), and strength (TS). We also developed empirical models between TD, TT, TS, and surface-water temperature (0-2 m) (T 0-2 m ), and transparency (Secchi disk depth, SDD). Additionally, we assessed the changes in TD, TT, and TS over the past 62 yr, based on our empirical models, air temperature data from 1951 to 2012, and SDD data from 1987 to 2012. Lake Qiandaohu is warm monomictic, with a long period of thermal stratification from April until January, and only a short period of mixing in the winter or spring (February or March). There were significant correlations between SDD and TD (positive), and between SDD and TT (negative). There was a significant negative correlation between T 0-2 m and TD during the stratification weakness period (July-February), and a significant positive correlation between T 0-2 m and TT for all data, including the stratification formation and weakness periods. Air temperature near the lake rose 1.2uC between 1951 and 2012, corresponding to a 0.8uC increase in T 0-2 m , and a 0.78 m decrease in SDD between 1987 and 2012. The increase in air temperature and the decrease in SDD caused a decrease in TD and an increase in TT, facilitating the thermal stratification and stability of the lake; therefore, climate warming has had a significant effect on the thermal regime of Lake Qiandaohu.

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“…( Table 5). Hypolimnetic anoxia is common in Missouri reservoirs during summer stratification (Jones et al, 2011). We observed this in both summers, wherein every warm monomictic reservoir (n = 31) experienced hypolimnetic anoxia with DO concentrations < 0.5 mg L −1 .…”

Section: Physical Parametersmentioning

confidence: 57%

“…High eutrophication rates in the agriculturally dominated Midwest (Mitsch et al, 2001;Jones et al, 2008a) make these reservoirs precursors of future surface water quality, as ∼94% of reservoirs in the study region are classified as mesotrophic, eutrophic, or hypertrophic (Jones et al, 2008b). Moreover, since Midwestern reservoirs regularly experience hypolimnetic anoxia during summer stratification (Jones et al, 2011), they may also forewarn how future light and nutrient dynamics will affect phytoplankton biomass and primary productivity.…”

Section: Introductionmentioning

confidence: 99%

Filling in the Flyover Zone: High Phosphorus in Midwestern (USA) Reservoirs Results in High Phytoplankton Biomass but Not High Primary Productivity

Petty

Obrecht

North

2020

Front. Environ. Sci.

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In lakes and reservoirs, climate change increases surface water temperatures, promotes thermal stability, and decreases hypolimnetic oxygen. Increased anthropogenic land-use and precipitation enhance nutrient and sediment supply. Together, these effects alter the light and nutrient dynamics constraining phytoplankton biomass and productivity. Given that lake and reservoir processes differ, and that globally, reservoir numbers are increasing to meet water demands, reservoir-centric studies remain underrepresented. In the agricultural Midwest (United States), ubiquitous reservoirs experience eutrophy and hypolimnetic anoxia. Here, we explore influences of eutrophication and landuse on the proximate light and nutrient status of phytoplankton communities in 32 Missouri reservoirs. Light and nutrient status indicators include mixed layer irradiance, phosphorus (P) and nitrogen (N) stoichiometry/debts, photosynthetic efficiency, and photosynthetic-irradiance parameters. Contributing to the ongoing P vs. N and P management debate, we evaluate if phytoplankton biomass and productivity are constrained by light, P, N, or a combination thereof, across gradients of trophic status and land-use during two contrasting wet and dry summers. Despite agricultural prevalence, P-deficiency is more prominent than either Nor light-deficiency. In 2018, ∼46% of samples were P-deficient with ∼36% indicating neither light nor nutrient deficiency. Gross primary productivity per unit chlorophyll-a (GPP B) demonstrates negative relationships with nutrients, biomass, and turbidity, and positive relationships with light availability. GPP B is highest in oligotrophic reservoirs where light utilization efficiency is also highest. Overall, phytoplankton biomass and productivity appear constrained by P and light, respectively. If Midwestern reservoirs are precursors of future inland waters affected by climate change and eutrophication, our crystal ball indicates that both P and light will be important regulators of phytoplankton dynamics and subsequent water quality.

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Temperature and oxygen in Missouri reservoirs

Cited by 27 publications

References 31 publications

Recycling Irrigation Reservoir Stratification and Implications for Crop Health and Production

Recycling Irrigation Reservoir Stratification and Implications for Crop Health and Production

Thermal structure and response to long‐term climatic changes in Lake Qiandaohu, a deep subtropical reservoir in China

Filling in the Flyover Zone: High Phosphorus in Midwestern (USA) Reservoirs Results in High Phytoplankton Biomass but Not High Primary Productivity

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