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https://www.readbyqxmd.com/read/28813138/quantifying-lake-water-quality-evolution-coupled-geochemistry-hydrodynamics-and-aquatic-ecology-in-an-acidic-pit-lake
#1
S Ursula Salmon, Matthew R Hipsey, Geoffrey W Wake, Gregory N Ivey, Carolyn E Oldham
Assessment of water quality evolution in the thousands of existing and future mine pit lakes worldwide requires new numerical tools that integrate geochemical, hydrological, and biological processes. A coupled model was used to test alternative hypothesized controls on water quality in a pit lake over ∼8 years. The evolution of pH, Al, and Fe were closely linked; field observations were reproduced with generic solubility equilibrium controls on Fe(III) and Al and a commonly reported acceleration of the abiotic Fe(II) oxidation rate by 2-3 orders of magnitude...
August 16, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28811606/identification-of-potential-impacts-of-climate-change-and-anthropogenic-activities-on-streamflow-alterations-in-the-tarim-river-basin-china
#2
Lianqing Xue, Fan Yang, Changbing Yang, Xinfang Chen, Luochen Zhang, Yixia Chi, Guang Yang
Understanding contributions of climate change and human activities to changes in streamflow is important for sustainable management of water resources in an arid area. This study presents quantitative analysis of climatic and anthropogenic factors to streamflow alteration in the Tarim River Basin (TRB) using the double mass curve method (DMC) and the Budyko methods. The time series (1960~2015) are divided into three periods: the prior impacted period (1960~1972) and the two post impacted periods, 1973~1986 and 1987~2015 with trend analysis...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811497/vertical-ocean-heat-redistribution-sustaining-sea-ice-concentration-trends-in-the-ross-sea
#3
Olivier Lecomte, Hugues Goosse, Thierry Fichefet, Casimir de Lavergne, Antoine Barthélemy, Violette Zunz
Several processes have been hypothesized to explain the slight overall expansion of Antarctic sea ice over the satellite observation era, including externally forced changes in local winds or in the Southern Ocean's hydrological cycle, as well as internal climate variability. Here, we show the critical influence of an ocean-sea-ice feedback. Once initiated by an external perturbation, it may be sufficient to sustain the observed sea-ice expansion in the Ross Sea, the region with the largest and most significant expansion...
August 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28810506/controls-on-anastomosis-in-lowland-river-systems-towards-process-based-solutions-to-habitat-conservation
#4
Paweł Marcinkowski, Robert C Grabowski, Tomasz Okruszko
Anastomosing rivers were historically common around the world before extensive agricultural and industrial development in river valleys. Few lowland anastomosing rivers remain in temperate zones, and the protection of these river-floodplain systems is an international conservation priority. However, the mechanisms that drive the creation and maintenance of multiple channels, i.e. anabranches, are not well understood, particularly for lowland rivers, making it challenging to identify effective management strategies...
August 8, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28810076/groundwater-development-stress-global-scale-indices-compared-to-regional-modeling
#5
William M Alley, Brian R Clark, David M Ely, Claudia C Faunt
The increased availability of global datasets and technologies such as global hydrologic models and the Gravity Recovery and Climate Experiment (GRACE) satellites have resulted in a growing number of global-scale assessments of water availability using simple indices of water stress. Developed initially for surface water, such indices are increasingly used to evaluate global groundwater resources. We compare indices of groundwater development stress for three major agricultural areas of the United States to information available from regional water budgets developed from detailed groundwater modeling...
August 15, 2017: Ground Water
https://www.readbyqxmd.com/read/28807999/role-of-co-occurring-competition-and-facilitation-in-plant-spacing-hydrodynamics-in-water-limited-environments
#6
Andrew C Trautz, Tissa H Illangasekare, Ignacio Rodriguez-Iturbe
Plant performance (i.e., fecundity, growth, survival) depends on an individual's access to space and resources. At the community level, plant performance is reflected in observable vegetation patterning (i.e., spacing distance, density) often controlled by limiting resources. Resource availability is, in turn, strongly dependent on plant patterning mediated by competitive and facilitative plant-plant interactions. Co-occurring competition and facilitation has never been specifically investigated from a hydrodynamic perspective...
August 14, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28806551/effects-of-agricultural-land-use-on-fluvial-carbon-dioxide-methane-and-nitrous-oxide-concentrations-in-a-large-european-river-the-meuse-belgium
#7
A V Borges, F Darchambeau, T Lambert, S Bouillon, C Morana, S Brouyère, V Hakoun, A Jurado, H-C Tseng, J-P Descy, F A E Roland
We report a data-set of CO2, CH4, and N2O concentrations in the surface waters of the Meuse river network in Belgium, obtained during four surveys covering 50 stations (summer 2013 and late winter 2013, 2014 and 2015), from yearly cycles in four rivers of variable size and catchment land cover, and from 111 groundwater samples. Surface waters of the Meuse river network were over-saturated in CO2, CH4, N2O with respect to atmospheric equilibrium, acting as sources of these greenhouse gases to the atmosphere, although the dissolved gases also showed marked seasonal and spatial variations...
August 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28806475/using-the-washoe-language-to-inform-hydrologic-and-environmental-models
#8
Helen Fillmore
No abstract text is available yet for this article.
August 14, 2017: Ground Water
https://www.readbyqxmd.com/read/28803424/nitrate-pollution-in-the-warta-river-poland-between-1958-and-2016-trends-and-causes
#9
Józef Górski, Krzysztof Dragon, Piotr Michał Jan Kaczmarek
The article presents analyses of long-term water quality data from the Warta River between 1958 and 2016. A clear increasing trend in nitrate concentrations was observed from 1958 to the early 1990s. This trend was mainly related to the increasing use of fertilizers in Poland in this period. Then, after the early 1990s, a slow decreasing trend related to improvements in water and sewage management and more rational fertilizer use was observed after political and economic changes in Poland. The influence of long-term hydrological droughts on nitrate concentrations was also investigated...
August 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28803376/debris-flow-induced-topographic-changes-effects-of-recurrent-debris-flow-initiation
#10
Chien-Yuan Chen, Qun Wang
Chushui Creek in Shengmu Village, Nantou County, Taiwan, was analyzed for recurrent debris flow using numerical modeling and geographic information system (GIS) spatial analysis. The two-dimensional water flood and mudflow simulation program FLO-2D were used to simulate debris flow induced by rainfall during typhoon Herb in 1996 and Mindulle in 2004. Changes in topographic characteristics after the debris flows were simulated for the initiation of hydrological characteristics, magnitude, and affected area. Changes in topographic characteristics included those in elevation, slope, aspect, stream power index (SPI), topographic wetness index (TWI), and hypsometric curve integral (HI), all of which were analyzed using GIS spatial analysis...
August 12, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28803202/interplay-of-hydrology-community-ecology-and-pollutant-attenuation-in-the-hyporheic-zone
#11
REVIEW
Ignacio Peralta-Maraver, Julia Reiss, Anne L Robertson
No abstract text is available yet for this article.
August 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28803200/ecological-state-of-a-mountain-river-before-and-after-a-large-flood-implications-for-river-status-assessment
#12
Hanna Hajdukiewicz, Bartłomiej Wyżga, Antoni Amirowicz, Paweł Oglęcki, Artur Radecki-Pawlik, Joanna Zawiejska, Paweł Mikuś
Assessment of the ecological status of rivers is key to monitoring the achievement of the environmental goal of the EU Water Framework Directive and the success of restoration projects. In summer of 2009 and 2010, repeated assessments of physical habitat conditions and of fish and benthic invertebrate communities were performed at low-flow conditions in 10 unmanaged and 10 channelized cross-sections of the Biała River, Polish Carpathians. Between the two surveys, an 80-year flood occurred, significantly affecting habitat characteristics and river communities...
August 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28801596/a-synthesis-of-soil-carbon-and-nitrogen-recovery-after-wetland-restoration-and-creation-in-the-united-states
#13
Lingfei Yu, Yao Huang, Feifei Sun, Wenjuan Sun
Wetland restoration and creation efforts have been widely attempted as a way to compensate for wetland losses and to recover wetland functions; however, to date, there has been no comprehensive evaluation of the efficacy of soil carbon (C) and nitrogen (N) content recovery at a regional scale. This meta-analysis synthesizes 48 articles to identify the general patterns of soil C and N change after wetland restoration and creation in the United States. Our results indicate that, after 11-20 years, soil C and N in restored and created wetlands are still significantly lower by 51...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28800978/modelling-landscape-dynamics-with-lst-in-protected-areas-of-western-ghats-karnataka
#14
T V Ramachandra, Setturu Bharath, Nimish Gupta
Forest ecosystems sustain biota on the earth as they are habitat to diverse biotic species, arrests soil erosion, play a crucial role in water cycle, sequester carbon, and helps in mitigating the impacts of global warming. Large scale land use land cover (LULC) change leading to deforestation is one of the drivers of global climate changes and alteration of biogeochemical cycles with significant consequences in ecosystem services and biodiversity. This has necessitated the investigation of LULC by mapping, monitoring and modelling spatio-temporal patterns and evaluating these in the context of human-environment interactions...
August 8, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28800684/sediment-zn-release-during-post-drought-re-flooding-assessing-environmental-risk-to-hyalella-azteca-and-daphnia-magna
#15
Sara M Nedrich, G Allen Burton
Hydrologic variability exacerbated by climate change affects biogeochemical cycling in sediments through changes in pH, redox, and microbial activity. These alterations affect the lability and speciation of metals, such that toxicity may be observed in otherwise non-toxic sediments. In this study, we investigate the effects of drought and reflooding on metal bioavailability in sediments with low to moderate concentrations of Zn (18-270 mg kg(-1)). Sediments were collected from coastal wetlands in Michigan, dried (36-days) and re-inundated in lab microcosms...
August 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28800225/automated-in-situ-oxygen-profiling-at-aquatic-terrestrial-interfaces
#16
Tanja Brandt, Michael Vieweg, Gerrit Laube, Robert Schima, Tobias Goblirsch, Jan H Fleckenstein, Christian Schmidt
Optical sensing technologies provide opportunities for in situ oxygen sensing capable of capturing the whole range of spatial and temporal variability. We developed a miniaturized Distributed Oxygen Sensor ('mDOS') specifically for long-term in situ application in soil and sediment. The mDOS sensor system enables the unattended, repeated acquisition of time series of in situ oxygen profiles at a sub-cm resolution covering a depth of up to one meter. Compared to existing approaches, this provides the possibility to reveal highly variable and heterogenous oxygen dynamics at a high, quasi-continuous resolution across both scales...
August 11, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28797901/plastic-and-other-microfibers-in-sediments-macroinvertebrates-and-shorebirds-from-three-intertidal-wetlands-of-southern-europe-and-west-africa
#17
Pedro M Lourenço, Catarina Serra-Gonçalves, Joana Lia Ferreira, Teresa Catry, José P Granadeiro
Microplastics are widespread in aquatic environments and can be ingested by a wide range of organisms. They can also be transferred along food webs. Estuaries and other tidal wetlands may be particularly prone to this type of pollution due to their particular hydrological characteristics and sewage input, but few studies have compared wetlands with different anthropogenic pressure. Furthermore, there is no information on microplastic transfer to secondary intertidal consumers such as shorebirds. We analysed intertidal sediments, macroinvertebrates and shorebirds, from three important wetlands along the Eastern Atlantic (Tejo estuary, Portugal; Banc d'Arguin, Mauritania and Bijagós archipelago, Guinea-Bissau), in order to evaluate the prevalence and transfer of microplastics along the intertidal food web...
August 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28796807/modeling-vegetation-community-responses-to-sea-level-rise-on-barrier-island-systems-a-case-study-on-the-cape-canaveral-barrier-island-complex-florida-usa
#18
Tammy E Foster, Eric D Stolen, Carlton R Hall, Ronald Schaub, Brean W Duncan, Danny K Hunt, John H Drese
Society needs information about how vegetation communities in coastal regions will be impacted by hydrologic changes associated with climate change, particularly sea level rise. Due to anthropogenic influences which have significantly decreased natural coastal vegetation communities, it is important for us to understand how remaining natural communities will respond to sea level rise. The Cape Canaveral Barrier Island complex (CCBIC) on the east central coast of Florida is within one of the most biologically diverse estuarine systems in North America and has the largest number of threatened and endangered species on federal property in the contiguous United States...
2017: PloS One
https://www.readbyqxmd.com/read/28792541/hydrologic-cost-effectiveness-ratio-favors-switchgrass-production-on-marginal-croplands-over-existing-grasslands
#19
Yohannes Tadesse Yimam, Tyson E Ochsner, Garey A Fox
Switchgrass (Panicum virgatum L.) has attracted attention as a promising second generation biofuel feedstock. Both existing grasslands and marginal croplands have been suggested as targets for conversion to switchgrass, but the resulting production potentials and hydrologic impacts are not clear. The objectives of this study were to model switchgrass production on existing grasslands (scenario-I) and on marginal croplands that have severe to very severe limitations for crop production (scenario-II) and to evaluate the effects on evapotranspiration (ET) and streamflow...
2017: PloS One
https://www.readbyqxmd.com/read/28783916/veterinary-pharmaceutical-contamination-in-mixed-land-use-watersheds-from-agricultural-headwater-to-water-monitoring-watershed
#20
A Jaffrézic, E Jardé, A Soulier, L Carrera, E Marengue, A Cailleau, B Le Bot
Veterinary pharmaceuticals, widely used in intensive livestock production, may contaminate surface waters. Identifying their sources and pathways in watersheds is difficult because i) most veterinary pharmaceuticals are used in human medicine as well and ii) septic or sewer wastewater treatment plants (WWTP) can release pharmaceuticals into surface water, even in agricultural headwater watersheds. This study aimed to analyze the spatiotemporal variability of animal-specific, mixed-use, and human-specific pharmaceuticals, from agricultural headwaters with intensive livestock production and a WWTP to a watershed used for Water Framework Directive monitoring...
August 1, 2017: Science of the Total Environment
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