Runoff-induced vertical thermal dynamics in a canyon-shaped reservoir during the summer monsoon

Byun, Do-Seong; Cho, Yang‐Ki; Huh, In-Ae; Hart, Deirdre E.

doi:10.1071/mf04285

Cited by 6 publications

(4 citation statements)

References 13 publications

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“…During these events, the density of the inflowing water is substantially increased by mineral particles and a plume is formed that quickly penetrates into the deep interior of the lake sometimes reaching the deepest point. Such density-driven inflow plumes are also documented in other lakes and reservoirs (Byun et al 2005). A recent analysis by Fink et al (2016) indicated that these plumes constitute a regular characteristic of Lake Constance and contribute substantially to the oxygen dynamics within the deep hypolimnion.…”

Section: Alternative Ways Of Oxygen Import Into Deep Hypolimniamentioning

confidence: 81%

Long-term development of hypolimnetic oxygen depletion rates in the large Lake Constance

Rhodes

Hetzenauer

Frassl

et al. 2017

Ambio

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This study investigates over 30 years of dissolved oxygen dynamics in the deep interior of Lake Constance (max. depth: 250 m). This lake supplies approximately four million people with drinking water and has undergone strong re-oligotrophication over the past decades. We calculated depth-specific annual oxygen depletion rates (ODRs) during the period of stratification and found that 50% of the observed variability in ODR was already explained by a simple separation into a sediment- and volume-related oxygen consumption. Adding a linear factor for water depth further improved the model indicating that oxygen depletion increased substantially along the depth. Two other factors turned out to significantly influence ODR: total phosphorus as a proxy for the lake's trophic state and mean oxygen concentration in the respective depth layer. Our analysis points to the importance of nutrient reductions as effective management measures to improve and protect the oxygen status of such large and deep lakes.

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Section: Alternative Ways Of Oxygen Import Into Deep Hypolimniamentioning

confidence: 81%

Long-term development of hypolimnetic oxygen depletion rates in the large Lake Constance

Rhodes

Hetzenauer

Frassl

et al. 2017

Ambio

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“…The penetration of short wave radiation depends on the particulate matter, such as clay, colloids, bacteria, phytoplankton, and other large particles in water (Casamitjana et al ., ). The thermocline development is related to the inflow of runoff containing sediment, turbidity, conductivity, and nutrients (Byun et al ., ) and water withdrawal at different layers (Milstein and Zoran, ).…”

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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“…rivers, dams, lakes and estuaries) in combination with other physico-chemical factors (e.g. increased water inflow from rainfall events and stratification) may lead to algal blooms (Robson and Hamilton 2003;Byun et al 2005), resulting in de-oxygenation, reduced aesthetics and increased toxicity, and the loss of, and changes in, species diversity. Eutrophication can also detrimentally affect water for drinking and recreational use (Di and Cameron 2000; Davis and Koop 2001;McDowell et al 2004).…”

Section: Introductionmentioning

confidence: 99%

A review of nitrogen and phosphorus export to waterways: context for catchment modelling

Drewry

Newham

Greene

et al. 2006

Mar. Freshwater Res.

106

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This paper reviews knowledge of nitrogen and phosphorus generation from land use and export to waterways, including studies relevant to Australia. It provides a link between current and future modelling requirements, and the context for incorporation of this knowledge into catchment models for use by catchment managers. Selected catchment models used by catchment managers are reviewed, and factors limiting their application are addressed. The review highlights the importance of dissolved N and P for overland flow and groundwater pathways, for sheep, beef and dairy grazing land use. Consequently, the effectiveness of riparian buffers to remove N and P may not be adequate. Consideration of the effects of rainfall and hydrology, dissolved P and N losses from pastures and event-based catchment-scale loads are therefore important factors that should be incorporated into catchment models. The review shows that it is likely that nutrient losses under Australian dairying conditions have many similarities to worldwide studies. Catchment models need to represent the importance of event-based loads, intensively farmed land use, management and forms of nutrients. Otherwise there is a likelihood of either underestimating nutrient losses, or potentially overestimating the effectiveness of riparian buffers.

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Runoff-induced vertical thermal dynamics in a canyon-shaped reservoir during the summer monsoon

Cited by 6 publications

References 13 publications

Long-term development of hypolimnetic oxygen depletion rates in the large Lake Constance

Long-term development of hypolimnetic oxygen depletion rates in the large Lake Constance

Recycling Irrigation Reservoir Stratification and Implications for Crop Health and Production

A review of nitrogen and phosphorus export to waterways: context for catchment modelling

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