Modeling hypoxia in the central basin of Lake Erie under potential phosphorus load reduction scenarios

Rucinski, Daniel K.; DePinto, Joseph V.; Beletsky, Dmitry; Scavia, Donald

doi:10.1016/j.jglr.2016.07.001

Cited by 31 publications

(15 citation statements)

References 16 publications

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“…This finding suggested that the average water quality of Lake Yangchenghu was directly influenced by external loading, and that the improvement effectiveness was proportionate to the percentage of load reduction. Previous studies have similarly reported a strong linear relationship between maximum bloom biomass and summer averaged Chl-a versus the external TP loads, indicating that variations in TN, TP, and net algal growth are predominantly influenced by external loads, and that other factors, such as the meteorological conditions, remain less influential [18,20]. The load-response curves can be used to define target N and P loads for achieving a specific eutrophication status.…”

Section: Loading Reductionmentioning

confidence: 92%

“…In-lake nutrient inactive measures, like chemical precipitation and sediment capping, were successfully performed in many lakes, but a long-term success can only be obtained with sufficiently reduced external P-loadings [10]. The reduction of nutrient loads is, therefore, the preferred measure for eutrophication control and efficient reduction of chlorophyll-a [18,19] as well as cyanobacterial biomass [20]. Intensifying flushing by additional water transfer is an alternative approach, which aims at increasing the N and P export of the lake by replacing the nutrient-rich lake water with nutrient-poor transferred water.…”

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confidence: 99%

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Predicting Lake Eutrophication Responses to Multiple Scenarios of Lake Restoration: A Three-Dimensional Modeling Approach

Wang

Peng

et al. 2018

Water

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To improve the water quality and alleviate the eutrophication of Lake Yangchenghu, the third largest freshwater body within the Lake Taihu basin in China and an important source of drinking water, nutrient reduction strategies should be urgently addressed by decision makers, since virtually no improvement of water quality has taken place since the mid-1990s. Due to the lack of sufficient observation data and simulation results, a vertically compressed three-dimensional numerical model, the EcoTaihu model, was used to study the impact of three restoration measures on the water quality-namely, total nitrogen (TN), total phosphorus (TP) and biomass of phytoplankton (BP)-of Lake Yangchenghu: (i) total nutrient reduction, (ii) intensification of flushing by water transfer, and (iii) spatial adjustment of inflow channels. In particular, the spatial effects of the three restoration measures on the water quality were investigated. The results showed that the EcoTaihu model is applicable to other shallow lakes in China. The water quality responses to the different restoration scenarios showed significant spatio-temporal differences. The reduction of nutrient loads from inflows appeared to be the most effective measure for controlling the eutrophication and algal blooms in Lake Yangchenghu. The effectiveness of water transfer on the improvement of water quality for TN and TP was more influenced by the differences of nutrient concentrations between the transferred water and lake water, rather than flow rate, since no proportionate increase of improvement was observable in the case of larger transferred rates (60 m 3 s −1 ). The spatial narrowing of inflowing rivers in the southwestern lake could preferentially improve the water quality in the southern bay of the western lake, but would also result in a deterioration trend of water quality in the total lake and drinking water abstraction areas.measures for eutrophication control can be classified into two groups: (i) external measures aiming at reducing the load from catchment area, specifically including reduction of nutrient loads [5,6] and flushing [7][8][9], whereas (ii) in-lake measures influence the properties within the lake, including chemical precipitation [10][11][12], sediment capping [13], sediment dredging [14,15], biological uptake [16], or bio-manipulation [17]. In-lake nutrient inactive measures, like chemical precipitation and sediment capping, were successfully performed in many lakes, but a long-term success can only be obtained with sufficiently reduced external P-loadings [10]. The reduction of nutrient loads is, therefore, the preferred measure for eutrophication control and efficient reduction of chlorophyll-a [18,19] as well as cyanobacterial biomass [20]. Intensifying flushing by additional water transfer is an alternative approach, which aims at increasing the N and P export of the lake by replacing the nutrient-rich lake water with nutrient-poor transferred water. The efficiency of improvement depends on the lake size and the details of the water t...

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Section: Loading Reductionmentioning

confidence: 92%

mentioning

confidence: 99%

Predicting Lake Eutrophication Responses to Multiple Scenarios of Lake Restoration: A Three-Dimensional Modeling Approach

Wang

Peng

et al. 2018

Water

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“…Studies on hypoxia formation in the Chesapeake Bay, the Gulf of Mexico, and the Tokyo Bay have examined the influence of wind on hypoxia in various ways [14][15][16][17][36][37][38][39][40]. The intensity and direction of the wind were evaluated as the main factors influencing the formation and duration of the hypoxic layer.…”

Section: Physical Factors Affecting Hypoxia Formationmentioning

confidence: 99%

“…Further, many studies on the hypoxia formation in Lake Erie have quantitatively evaluated the effect of nutrient loading. Scavia et al [39] and Rucinski et al [40] suggested that the reduction of phosphorus may reduce the hypoxia area of the Lake Erie. Considering these prior studies, the reduction of nutrients from the Han River and the Gulpo River may have the potential to reduce hypoxia in GAW, and therefore, additional research is needed.…”

Section: Physical Factors Affecting Hypoxia Formationmentioning

confidence: 99%

Modeling Summer Hypoxia Spatial Distribution and Fish Habitat Volume in Artificial Estuarine Waterway

Chong

Park

Lee

et al. 2018

Water

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This study analyzes the dissolved oxygen (DO) depletion or hypoxia formation affecting the ecological vulnerability of Gyeongin-Ara Waterway (GAW), an artificial estuarine waterway. The physical, chemical, and biochemical factors affecting the summer hypoxia dynamics and distribution are simulated and the habitat volumes of major fish species are calculated. CE-QUAL-W2, a two-dimensional hydrodynamic and water quality model, is applied for the simulation. Comparison with observation reveals that the salinity stratification, vertical DO gradient, and summer hypoxia characteristics are realistically reproduced by the model. Comprehensive analysis of the spatial distributions of the residence time, salinity, and DO concentration reveal that the residence time is longest at the bottom of a freshwater inflow zone. Accordingly, residence time is identified as the physical factor having the greatest influence on hypoxia. It is also clear that a hypoxic water mass diffuses towards the entire waterway during neap tides and summer, when the seawater inflow decreases. Based on the modeling results, the DO depletion drivers are identified and the hypoxic zone formation and distribution are sufficiently explained. Finally, fish habitat volumes are calculated. In particular, the survival habitat volume of Mugil cephalus is found to decrease by 32–34% as a result of hypoxia from July to August. The model employed in this study could be utilized to establish an operational plan for the waterway, which would increase fish habitat volumes.

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“…he western basin of Lake Erie (WBLE) is currently experiencing a resurgence of harmful algal blooms (HABs) and low oxygen conditions (hypoxia), driven primarily by increases in phosphorus (P) loads to the lake (Obenour et al, 2014;Scavia et al, 2014Scavia et al, , 2016Rucinski et al, 2016). To reduce the occurrence and severity of HABs and hypoxia, the U.S. and Canada set a lake-wide P load target of a 40% reduction from 2008 levels.…”

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confidence: 99%

Pay-for-Performance Conservation Using SWAT Highlights Need for Field-Level Agricultural Conservation

Muenich¹,

Kalcic

Winsten

et al. 2017

Transactions of the ASABE

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Modeling hypoxia in the central basin of Lake Erie under potential phosphorus load reduction scenarios

Cited by 31 publications

References 16 publications

Predicting Lake Eutrophication Responses to Multiple Scenarios of Lake Restoration: A Three-Dimensional Modeling Approach

Predicting Lake Eutrophication Responses to Multiple Scenarios of Lake Restoration: A Three-Dimensional Modeling Approach

Modeling Summer Hypoxia Spatial Distribution and Fish Habitat Volume in Artificial Estuarine Waterway

Pay-for-Performance Conservation Using SWAT Highlights Need for Field-Level Agricultural Conservation

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