Seasonal nearshore sediment resuspension and water clarity at Lake Tahoe

Reardon, Kristin E.; Moreno-Casas, Patricio A.; Bombardelli, Fabián A.; Schladow, S. Geoffrey

doi:10.1080/10402381.2015.1136013

Cited by 9 publications

(8 citation statements)

References 25 publications

(37 reference statements)

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“…The rain intensity that was observed from June to October produced an aquifer recharge that consequently diluted the pesticides. In addition, a horizontal drag of sediments caused a resuspension of solids that muddled the water (Reardon et al ). p , p ´‐DDT was subsequently retained in the solids resuspended in the water.…”

Section: Resultsmentioning

confidence: 99%

Presence of DDT and Lindane in a Karstic Groundwater Aquifer in Yucatan, Mexico

Giácoman‐Vallejos¹,

Lizarraga‐Castro²,

Ponce‐Caballero³

et al. 2018

Groundwater Monitoring Rem

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Pollution caused by pesticides is becoming relevant because of their harmful environmental effects. The persistence, bioaccumulation and toxicity of some organochloride pesticides have resulted in their restricted use since 1970 and a requirement to monitor them in many countries. Pesticides have endocrine, immunological, reproductive and carcinogenic effects in both humans and animals. The facilitated infiltration of substances results in the pollution of hydric underground resources in karstic limestone such as that found in the state of Yucatan. Observing the north occidental region of the state of Yucatan is particularly important as it is characterized by agricultural activities (wide use of pesticides), significant human settlements and underground water flows oriented towards the north coast. In this study, the underground water quality of a karstic aquifer was evaluated by quantifying the presence of organochlorine pesticides in 29 wells located throughout the Mérida‐Progreso transect, Yucatan, Mexico. The presence of DDT, lindane and their metabolites was detected at concentrations above the permissible limits stated by Mexican regulatory standards (NOM‐127‐SSA1‐1994 2010) in the majority of wells studied. Continuous monitoring of the underground hydric resources in this region is therefore essential to raising awareness of pollution risks and the vulnerability of the coastal north to the contamination of the underground water flows.

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Section: Resultsmentioning

confidence: 99%

Presence of DDT and Lindane in a Karstic Groundwater Aquifer in Yucatan, Mexico

Giácoman‐Vallejos¹,

Lizarraga‐Castro²,

Ponce‐Caballero³

et al. 2018

Groundwater Monitoring Rem

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“…There is little precedent for applying STWAVE to the full perimeter of a lake, and, to the authors' knowledge, there is no other steady‐state wave model actively used in lake research. Reardon et al (, ) investigated STWAVE bed‐shear predictions at a single site in Lake Tahoe under a limited range of wind conditions but did not directly evaluate the validity of steady‐state, uniform‐wind field assumptions. STWAVE has been evaluated in a variety of coastal settings (Buonaiuto et al, ; Dietrich et al, ; Fonseca et al, ; Gonçalves et al, ) and to storm‐forcing predictions in southern Lake Michigan (Jensen et al, ).…”

Section: Discussionmentioning

confidence: 99%

“…Reardon et al () use STWAVE output to generate management curves for predicting resuspension as a product of only wind speed and direction data for a single site in the nearshore of south Lake Tahoe and extend their results to estimate the areal extent of resuspension potential in south Lake Tahoe's shore zone. The bases for this model application are the results of Reardon et al (), which utilize acoustic Doppler velocimeter data to validate STWAVE‐predicted bed‐shear stress and suspended sediment concentration data to validate the extension of STWAVE model results to a sediment resuspension model.…”

Section: Introductionmentioning

confidence: 99%

“…The bases for this model application are the results of Reardon et al (), which utilize acoustic Doppler velocimeter data to validate STWAVE‐predicted bed‐shear stress and suspended sediment concentration data to validate the extension of STWAVE model results to a sediment resuspension model. However, as noted by Reardon et al (), the use of STWAVE to reconstruct wave‐forcing and resuspension patterns for the full perimeter of Lake Tahoe, or for the full perimeter of any lake, would be better justified with field validation data encompassing a greater spatial and temporal scope.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Predicting Wave‐Induced Sediment Resuspension at the Perimeter of Lakes Using a Steady‐State Spectral Wave Model

Roberts

Moreno-Casas

Bombardelli

et al. 2019

Water Resources Research

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A steady-state spectral wave model, STWAVE, is evaluated as a tool for predicting wave-induced sediment resuspension in lake littoral zones. Steady-state wave height and bed-shear stress estimates are tested against 2 years of high-frequency wave height and turbidity data from six littoral measurement stations in Lake Tahoe. Average wave and sediment resuspension response to a broad range of wind conditions are well captured by the model. Despite steady-state assumptions, the model reproduces patterns in wave height and sediment resuspension under time-varying wind conditions at sites with different wave exposure. Model results are insensitive to the measurement location of wind data input among six offshore meteorological buoys. Uniform and variable wind field assumptions yield similar resuspension predictions. Results representing the steady-state response to spatially uniform wind speed-direction combinations enable output from a single set of model runs to serve as a reasonable static reference for hindcasting and predicting wave resuspension patterns. This obviates the need for repeated model runs, making STWAVE output an efficient tool for exploring long-term spatio-temporal patterns in nearshore wave forcing. Application of this tool is limited by wave height overprediction for short fetches and presumably by the validity of uniform wind field assumptions over very long fetches. Applied successfully at Lake Tahoe, we find that the north and east shores, exposed to the prevailing southwesterly winds, see resuspension conditions upward of 3,000 hr/year, while the south and west shores typically see less than 500. Location-specific resuspension hours can vary by upward of ±200 hr/year due to shifting interannual wind patterns.Plain Language Summary A tool that describes lake-wide wave conditions as a function of combinations of wind speeds and directions is tested using 2 years of wave height and water clarity data from six nearshore locations at Lake Tahoe. The data confirm the modeling tool's ability to predict wave-driven resuspension of lake bed sediments. An example application details seasonal and interannual variability in wind wave influence at the perimeter of Lake Tahoe. Due to the prevailing southwesterly winds, exposed sections of the north and east shores of the lake can see in excess of 3,000 hr of sediment resuspension-inducing wave conditions per year, while the south and west shores are comparatively calm. In representative year 2016, wave forcing was more prevalent in the fall and winter seasons. Key Points:• A steady-state wind-wave model, with uniform-wind field forcing, accurately predicts littoral sediment resuspension in a deep lake • Model output for discrete wind speed-direction combinations enables reconstruction of resuspension patterns without repeated model runs • Wind waves drive resuspension conditions 30-40% of the fall and winter seasons on the wave-exposed north and east shores of Lake Tahoe

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“…Our approach is calibrated by modeling the historical section in core OL97 with limnological conditions for the period AD 1872-1878 when Owens Lake was at its historical maximum water level. Winddriven sediment entrainment occurs when water depth is shallow enough to effectively transfer the momentum of windwaves from the water surface to the sedimentwater interface (Håkanson and Jansson, 2002;Reardon et al, 2016). Wind waves and the fluid shear stresses they produce within the water column are the main mechanism responsible for sediment erosion and resuspension when the critical shear stress of bottom sediment is exceeded (e.g., Fagherazzi and Wiberg, 2009).…”

Section: Radiocarbon Analysismentioning

confidence: 99%

A continuous 4000-year lake-level record of Owens Lake, south-central Sierra Nevada, California, USA

et al. 2018

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Reconstruction of lake-level fluctuations from landform and outcrop evidence typically involves characterizing periods with relative high stands. We developed a new approach to provide water-level estimates in the absence of shoreline evidence for Owens Lake in eastern California by integrating landform, outcrop, and existing lake-core data with wind-wave and sediment entrainment modeling of lake-core sedimentology. We also refined the late Holocene lake-level history of Owens Lake by dating four previously undated shoreline features above the water level (1096.4 m) in AD 1872. The new ages coincide with wetter and cooler climate during the Neopluvial (~3.6 ka), Medieval Pluvial (~0.8 ka), and Little Ice Age (~0.35 ka). Dates from stumps below 1096 m also indicate two periods of low stands at ~0.89 and 0.67 ka during the Medieval Climatic Anomaly. The timing of modeled water levels associated with 22 mud and sand units in lake cores agree well with shoreline records of Owens Lake and nearby Mono Lake, as well as with proxy evidence for relatively wet and dry periods from tree-ring and glacial records within the watershed. Our integrated analysis provides a continuous 4000-yr lake-level record showing the timing, duration, and magnitude of hydroclimate variability along the south-central Sierra Nevada.

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Seasonal nearshore sediment resuspension and water clarity at Lake Tahoe

Cited by 9 publications

References 25 publications

Presence of DDT and Lindane in a Karstic Groundwater Aquifer in Yucatan, Mexico

Presence of DDT and Lindane in a Karstic Groundwater Aquifer in Yucatan, Mexico

Predicting Wave‐Induced Sediment Resuspension at the Perimeter of Lakes Using a Steady‐State Spectral Wave Model

A continuous 4000-year lake-level record of Owens Lake, south-central Sierra Nevada, California, USA

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