Exploration of spatial variability in nearshore water quality using the first Great Lakes National Coastal Condition Assessment survey

Kelly, John R.; Yurista, Peder M.; Starry, Matthew A.; Scharold, Jill V.; Bartsch, Will; Cotter, Anne M.

doi:10.1016/j.jglr.2015.09.007

Cited by 13 publications

(4 citation statements)

References 53 publications

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“…Many surface and groundwater pollution problems are related to excess nutrients derived from agricultural production practices (Ritter et al, 2002;Kelly et al, 2015;Liang et al, 2014). Preferential flow in agricultural soils can directly and significantly contribute to many of these pollution burdens (Gärdenäs et al, 2006;Ulén et al, 2014).…”

mentioning

confidence: 99%

Reactive Transport of Manure‐Derived Nitrogen in the Vadose Zone: Consideration of Macropore Connectivity to Subsurface Receptors

Hussain

Frey

Blowes

et al. 2019

Vadose Zone Journal

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Core Ideas Manure N transformation was modeled with different soil pore connectivities to tile drains. Macropores facilitated NH4+ oxidation reaction products deeper in the profile. Nitrate losses to tile were best predicted by models using pores connected to tile drains. Macropores can be important conduits for surface‐derived nutrients to reach subsurface receptors. Accordingly, nutrient reactive transport processes in macroporous soils need to be well understood. In this study, steady‐state two‐dimensional reactive transport simulations with MIN3P‐THCm (version 1.0.519.0) were used to elucidate how soil macropore connectivity to tile drains can influence N transformations following liquid swine manure (LSM) applications to soil. Four different soil scenarios were considered: homogeneous sand, homogeneous clay loam, and clay loam with discrete macropores connected to or disconnected from the bottom boundary used to represent tile drain outflow. In relation to the homogeneous soils, macropores, overall, facilitated chemical diffusion into the adjacent soil matrix along their length and broadly augmented O2 ingress into the soil profile. These processes combined to critically control the spatial distribution of NH4+ oxidation reaction products. When used in transient simulation mode with field data observed at experimental tile‐drained plots that received LSM application, the model showed that simulated nitrate mass losses to tile are considerably higher and most realistic under the connected macropore scenario compared with the homogeneous or disconnected macropore scenarios.

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mentioning

confidence: 99%

Reactive Transport of Manure‐Derived Nitrogen in the Vadose Zone: Consideration of Macropore Connectivity to Subsurface Receptors

Hussain

Frey

Blowes

et al. 2019

Vadose Zone Journal

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“…2). First we defined the nearshore as a well-mixed zone, distinct from the stratified offshore and where longshore currents dominate, and is often thought to be the approximate depth limit of tributary influence (Yurista et al 2012(Yurista et al , 2016Kelly et al 2015;Scharold et al 2015;Wang et al 2015). We defined the extent of the nearshore zone as <30 m depth Fig.…”

Section: Bathymetrymentioning

confidence: 99%

“…The directional (alongshore) current was defined as occurring from the 5 m isobaths to either the 30 m isobaths (15 m in Lake Erie) or 5 km from the high-resolution shoreline, whichever distance was greater (Table 3; Fig. 2) based on a compilation of studies and information describing circulation patterns (Beletsky et al 1999;Rao and Schwab 2007;Kelly et al 2015;C. Troy, Purdue University, personal communication, 2015).…”

Section: Mechanical Energymentioning

confidence: 99%

Ecosystem classification and mapping of the Laurentian Great Lakes

Riseng

Wehrly

Wang³

et al. 2018

Can. J. Fish. Aquat. Sci.

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Owing to the enormity and complexity of the Laurentian Great Lakes, an ecosystem classification is needed to better understand, protect, and manage this largest freshwater ecosystem in the world. Using a combination of statistical analyses, published knowledge, and expert opinion, we identified key driving variables and their ecologically relevant thresholds and delineated and mapped aquatic systems for the entire Great Lakes. We identified and mapped 77 aquatic ecological units (AEUs) that depict unique combinations of depth, thermal regime, hydraulic, and landscape classifiers. Those 77 AEU types were distributed across 1997 polygons (patches) ranging from 1 to >48 000 km 2 in area and were most diverse in the nearshore (35 types), followed by the coastal margin (26), and then the offshore (16). Our classification and mapping of ecological units captures gradients that characterize types of aquatic systems in the Great Lakes and provides a geospatial accounting framework for resource inventory, status and trend assessment; research for ecosystem questions; and management and policy-making. Résumé : En raison de l'énormité et de la complexité des Grands Lacs laurentiens, une classification des écosystèmes est nécessaire pour mieux comprendre, protéger et gérer ce plus grand écosystème d'eau douce du monde. En utilisant une combinaison d'analyses statistiques, de connaissances publiées et d'opinions de spécialistes, nous avons cerné des variables clés et leurs seuils importants sur le plan écologique, et délimité et cartographié les systèmes aquatiques pour l'entièreté des Grands Lacs. Nous avons cerné et cartographié 77 unités écologiques aquatiques (UEA) qui représentent les différentes combinaisons de profondeur, de régime thermique et de variables hydrauliques et du paysage importantes pour la classification. Ces 77 types d'UEA sont répartis sur 1997 polygones (parcelles) de superficies allant de 1 à >48 000 km 2 , la région sublittorale en présentant la plus grande diversité (35 types), suivie des bandes côtières (26), puis de la zone extracôtière (16). La classification et la cartographie des unités écologiques font ressortir les gradients qui caractérisent les types de systèmes aquatiques dans les Grands Lacs et fournissent un cadre géospatial de référence pour l'inventaire des ressources, l'évaluation des statuts et tendances, la recherche sur des questions touchant aux écosystèmes et la gestion et l'élaboration de politiques. [Traduit par la Rédaction]

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“…Specific pollutants (pollution caused by all major pollutants; pollution caused by other substances discharged into the water) USA Nutrients (total nitrogen and total phosphorus,); dissolved oxygen, temperature, pH, turbidity, buffer capacity, salinity, mercury content in sediment Japan COD or BOD (the amount of organic matter excreted in human daily life); transparency; fecal coliforms; ammonia nitrogen; odor; dissolved oxygen Landscape and recreation index Europe USA Fishing; swimming Japan Landscape (feel) (whether the waterside landscape is coordinated); visual (whether the garbage is heaped by the water); touch (do you feel good when you touch the bottom of the river); smell (whether the water smells good); hearing (whether the sounds heard by the water are comfortable); geographical resources of history and culture (whether there is history and culture related to the river evaluation, whether it is developed); difficulty and easiness of being near water (whether it is safe and easy to be near water); utilization of residents (whether walking around the lake, or carrying out recreational activities); economic activities (whether it is used for tourism, industrial and agricultural water, shipping, etc. ); environmental activities (whether residents and other people use the evaluated river to carry out water environment learning and conservation activities) river basin organizations have put forward some evaluation index systems and evaluation methods [7][8][9][10][11][12]. In LE security evaluation, the domestic researches pay attention to the ecological health and service function security of lakes and emphasize the harmony between people and water.…”

Section: Usamentioning

confidence: 99%

An evaluation of the ecological security of the Dongting Lake, China

Wang¹,

Zhang²,

Kang³

et al. 2018

Desalination and Water Treatment

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Evaluation of lake ecological security is important for sustainable management of lakes and regional ecological environment construction. Dongting Lake is the second largest freshwater lake in China; its ecological security directly threatens the ecological security of the middle and lower reaches of the Yangtze River. In this paper, the ecological security evaluation index system of the Dongting Lake is constructed, including target layer (first order), criterion layer (second order), and index layer (last order). The target layer is the ecological security of the lake, the standard layer includes five indicators, and the index layer includes 11 indicators. The comprehensive evaluation method is used to evaluate the ecological security of the Dongting Lake by assessing all indexes of every layer. The weight of each index is determined by analytic hierarchy process. The evaluation results showed that the ecological security score of the Dongting Lake is 58 points, belonging to sub-security level. At present, the Dongting Lake has problems of low ecological water level, reduced lake surface area, eutrophication, and reduced lake storage capacity. Therefore, in future, the industrial and domestic pollution sources should be controlled, and the carrying capacity of water environment should be improved.

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Exploration of spatial variability in nearshore water quality using the first Great Lakes National Coastal Condition Assessment survey

Cited by 13 publications

References 53 publications

Reactive Transport of Manure‐Derived Nitrogen in the Vadose Zone: Consideration of Macropore Connectivity to Subsurface Receptors

Reactive Transport of Manure‐Derived Nitrogen in the Vadose Zone: Consideration of Macropore Connectivity to Subsurface Receptors

Ecosystem classification and mapping of the Laurentian Great Lakes

An evaluation of the ecological security of the Dongting Lake, China

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