Integrated workflow for interpretation of satellite imageries using machine learning to assess and monitor algal blooms in Utah Lake, USA

Ecological Informatics, Journal Year: 2023, Volume and Issue: 75, P. 102033 - 102033

Published: Feb. 24, 2023

Language: Английский

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How seasonal hydroclimate variability drives the triple oxygen and hydrogen isotope composition of small lake systems in semiarid environments

Hydrology and earth system sciences, Journal Year: 2025, Volume and Issue: 29(6), P. 1783 - 1806

Published: April 2, 2025

Abstract. This research investigates the influence of seasonal hydroclimate variability on triple oxygen and hydrogen isotope composition small, shallow lake systems that show substantial intra-annual interannual fluctuations in water level. The study was conducted at Laguna Honda, a semi-permanent located semiarid Mediterranean environment southern Spain. Over 1 year, level monitored continuously samples from northern margin were taken monthly for major ion concentration analyses. period, dropped 1.4 to 0.6 m, while salinity increased 23 130 g L−1 δ18O, δ2H, 17O excess varied −2 ‰ 15 ‰, −26 51 −9 per meg −87 meg, respectively. Hydrological mass balance calculations indicate precipitation, basin discharge, evaporation control changes inflow other sources, such as groundwater, is absent. water's mainly driven by relative humidity (34 %–73 %), precipitation discharge can cause transitional mixing effects that, however, remain small magnitude (<10 %). In vs. δ′18O space, forms loop evolving low δ18O high winter higher lower summer along convex curvature, then back with beginning subsequent rainy season concave curvature. system allows identification non-steady-state conditions, which challenging using δ2H alone due linearity trends this system. large isotopes should be considered when interpreting data obtained paleo-archives sediments arid environments.

Language: Английский

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Investigating Temporal and Spatial Variations of Nutrient and Trace Metal Loading in Utah Lake (Utah, USA)

Water, Journal Year: 2024, Volume and Issue: 16(3), P. 502 - 502

Published: Feb. 4, 2024

Utah Lake is one of the largest freshwater bodies in West and a valuable resource for agricultural recreational activities region. However, it has suffered elevated trace metal nutrient levels since pioneer settlement 1847. The objectives this project were as follows: (1) investigate temporal spatial variations concentrations its tributaries; (2) model across lake using GIS analysis techniques. We collected floc layer sediment samples quarterly well monthly water analyses at designated sites. techniques used to lake. Elevated river have been detected, especially month June. modeling revealed that highest located deepest part near Spanish Fork River inlet, respectively. Moreover, results indicate not mixed horizontally but vertically. Our findings can help state agencies address issues quality management related human–environment interactions.

Language: Английский

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Megafire affects stream sediment flux and dissolved organic matter reactivity, but land use dominates nutrient dynamics in semiarid watersheds

PLoS ONE, Journal Year: 2021, Volume and Issue: 16(9), P. e0257733 - e0257733

Published: Sept. 23, 2021

Climate change is causing larger wildfires and more extreme precipitation events in many regions. As these ecological disturbances increasingly coincide, they alter lateral fluxes of sediment, organic matter, nutrients. Here, we report the stream chemistry response watersheds a semiarid region Utah (USA) that were affected by megafire followed an event October 2018. We analyzed daily to hourly water samples at 10 locations from before storm until three weeks after its conclusion for suspended solute nutrient concentrations, isotopes, dissolved matter concentration, optical properties, reactivity. The caused ~2,000-fold increase sediment flux ~6,000-fold particulate carbon nitrogen over course storm. Unexpectedly, (DOC) concentration was 2.1-fold higher burned watersheds, despite decreased fire. DOC 1.3-fold biodegradable 2.0-fold photodegradable than unburned based on 28-day dark light incubations. Regardless burn status, concentrations with greater urban agricultural land use. Likewise, human use had effect apparent hydrological residence time, rapid stormwater signals areas but gradual pulse without direct influence. These findings highlight how megafires intense rainfall short-term characteristics. However, contrast previous research, which has largely focused burned-unburned comparisons pristine found influence exerted primary control status. Reducing anthropogenic sources could therefore socioecological resilience surface networks changing wildfire regimes.

Language: Английский

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Historical Phosphorus Mass and Concentrations in Utah Lake: A Case Study with Implications for Nutrient Load Management in a Sorption-Dominated Shallow Lake

Water, Journal Year: 2024, Volume and Issue: 16(7), P. 933 - 933

Published: March 23, 2024

Utah Lake is unusual due to its large surface area, shallow depth, phosphorus-rich sediments, and well-mixed, unstratified waters. This creates conditions where water column phosphorous concentrations tend toward equilibrium, with lake sediments containing high of geologic phosphorus. To help understand the potential impact load reductions, we computed a time history phosphorus mass in using state federal records volume, dissolved concentrations, outflow. We show that historically, have remained stable over time, range 0.02 0.04 mg/L, despite changes volume internal mass. performed sorption calculations data from literature, demonstrating it would take unrealistically alter under processes. The model produces results consistent historical relatively constant changes. show, through several lines evidence, are insensitive external loads. Phosphorous reduction unlikely significant effect on and, by extension, other sorption-dominated lakes sediment.

Language: Английский

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Regulated ICP-OES Detectible Elements in Utah Lake: Characterization and Discussion

Published: July 4, 2024

During 2021 and 2022 summers, we measured the total dissolved (&amp;lt; 0.45 mm) concentration of 25 elements in Utah Lake using Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES). regulates twelve these elements. ICP-OES sensitivity is at ppb-level but not approved regulatory method. All regulations are for concentrations; except aluminum (Al) phosphorus (P) which recovery. We found Al concentrations above allowable, were well below allowable concentrations. attribute high to suspended clays. Dissolved copper (Cu) levels 2021, some samples 2022. This could be related use Cu-based algaecide treatments, or from other sources. Lead (Pb) data inconclusive; Pb acute (1-hour average) limit, chronic limit (4-hour minimal detection limit. Arsenic (As) exhibit a seasonal trend that groundwater inflows. study provides insight into regulated previously available due method measurements both

Language: Английский

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Tracking seasonal evaporation of arid Ebinur Lake, NW China: isotopic evidence

Environmental Earth Sciences, Journal Year: 2024, Volume and Issue: 83(18)

Published: Sept. 1, 2024

Language: Английский

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Citizen science reveals unexpected solute patterns in semiarid river networks

PLoS ONE, Journal Year: 2021, Volume and Issue: 16(8), P. e0255411 - e0255411

Published: Aug. 19, 2021

Human modification of water and nutrient flows has resulted in widespread degradation aquatic ecosystems. The resulting global crisis causes millions deaths trillions USD economic damages annually. Semiarid regions have been disproportionately affected because high relative demand pollution. Many proven management strategies are not fully implemented, partially a lack public engagement with freshwater In this context, we organized large citizen science initiative to quantify status cultivate connection the semiarid watershed Utah Lake (USA). Working community members, collected samples from ~200 locations throughout 7,640 km 2 on single day spring, summer, fall 2018. We calculated ecohydrological metrics for nutrients, major ions, carbon. For most solutes, concentration leverage (influence flux) were highest lowland reaches draining directly lake, coincident urban agricultural sources. Solute sources relatively persistent through time parameters despite substantial hydrological variation. Carbon, nitrogen, phosphorus species showed critical source area behavior, 10–17% sites accounting flux. Unlike temperate watersheds, where spatial variability often decreases size, longitudinal an hourglass shape: among headwaters, low mid-order reaches, tailwaters. This unexpected pattern was attributable distribution human activity complexity associated return flows, losing river diversions conclude that participatory great potential reveal patterns rehabilitate individual relationships local way, such projects represent opportunity both understand improve quality diverse socioecological contexts.

Language: Английский

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Characteristics of Hydrogen and Oxygen Isotope Composition in Precipitation, Rivers, and Lakes in Wuhan and the Ecological Environmental Effects of Lakes

Water, Journal Year: 2023, Volume and Issue: 15(16), P. 2996 - 2996

Published: Aug. 19, 2023

Wuhan has a dense network of rivers and lakes. Due to the city’s development, water system been fragmented, degradation lakes is becoming increasingly severe, eco-environment significantly damaged. By collecting samples central surface bodies in Wuhan, including Yangtze River water, Han lake precipitation, by utilizing hydrogen oxygen isotopes multivariate statistical methods, hydraulic connectivity ecological environmental effects between River, were revealed. The results indicated following: (1) local meteoric Line (LMWL) area was δD = 7.47δ18O + 1.77. river line equation approximately parallel atmospheric precipitation area. intercept slope waterline smaller. enrichment degree δ18O < Hanjiang water. (2) cluster analysis showed that could be divided into two types, i.e., inner-flow degraded (IFD) outer-flow (OFE) Urban expansion resulted fragmentation IFD lakes, changing weakening exchange Simultaneously, evaporation caused isotope fractionation, resulting relative isotopes. included Taizi Lake, Yehu Shenshan Lake. OFE active, weak, relatively depleted, mainly Huangjia East Tangxun etc. (3) excessive deuterium (d-excess) parameter values positive. In contrast, d negative. case weakened cycle, effect on had significant impact. It suggested connection project “North Lake-South Lake-Yangtze River” small connecting large “Wild Lake-Shenshan Lake-Tangxun Lake” should implemented time restore eco-environment.

Language: Английский

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Promoting Biotic Resistance in Seed-based Wetland Restoration Under Hydrologic Extremes

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: June 21, 2024

Understanding the factors that drive biotic resistance is important for designing invasion resistant wetland seed mixes. Two affect and can be altered in a mix are native plant seeding density diversity. Here we evaluated effects of functional group identity (annual forb, bulrush, grass, perennial or rush) (low high) on growth species an invader (Phragmites australis) at two sites Great Salt Lake Watershed, USA, over years. We found treatments appeared to largely overwhelmed by water depth due extreme weather events (severe drought year 1 prolonged flooding 2). However, these provided opportunity observe recovery potential different groups identify three (Bolboschoenus maritimus Schoenoplectus acutus from bulrush Distichlis spicata grass group) were able survive conditions during both growing seasons one field sites. Furthermore, emergent restoration have community outcomes despite geographic proximity, possibly distinct site environmental conditions. These findings underscore importance using bet-hedging strategies (e.g., diverse mixes with range hydrologic tolerances) overcome challenges under extremes, likely become more common climate change ever-increasing upstream diversions.

Language: Английский

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