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https://www.readbyqxmd.com/read/28104330/evaluation-of-individual-and-combined-management-practices-to-reduce-the-off-site-transport-of-pesticides-from-golf-course-turf
#1
Pamela J Rice, Brian P Horgan, Jennifer L Hamlin
The detection of pesticides, associated with turfgrass management, in storm runoff and surface waters of urban watersheds has raised concerns regarding their source, potential environmental effects and a need for strategies to reduce their inputs. In previous research we discovered that hollow tine core cultivation (HTCC) was more effective than other management practices for reducing the off-site transport of pesticides with runoff from creeping bentgrass turf managed as a golf course fairway. This was primarily the result of enhanced infiltration and reduced runoff volumes associated with turf managed with hollow tines...
January 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28092769/spatiotemporal-change-of-phosphorous-speciation-and-concentration-in-stormwater-in-the-st-lucie-estuary-watershed-south-florida
#2
Liguang Li, Zhenli He, Zhigang Li, Suli Li, Yongshan Wan, Peter J Stoffella
Phosphorous (P) concentration in stormwater runoff varies at different spatial and temporal scales. Excessive P loading from agriculture system into the St. Lucie Estuary (SLE) contributed to water quality deterioration in southern Indian River Lagoon. This study examines the spatial and temporal shifts of different P forms in runoff and storm water under different land use, water management, and rainfall conditions. Storm water samplings were conducted monthly between April 2013 and December 2014 in typical farmland and along the waterway (Canal C-24) that connects lands to the SLE...
January 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/28087074/quantifying-loading-toxic-concentrations-and-systemic-persistence-of-chloride-in-a-contemporary-mixed-land-use-watershed-using-an-experimental-watershed-approach
#3
J A Hubbart, E Kellner, L W Hooper, S Zeiger
A nested-scale experimental watershed study was implemented to quantify loading and persistence of chloride in an urbanizing, mixed-land-use watershed. A Midwest USA (Missouri) watershed was partitioned into five sub-basins with contrasting dominant land use. Streamwater was tested for chloride concentration four days per week from October 2009 through May 2014 at each site. Monitoring sites included co-located gauging and climate stations recording variables at 30-minute intervals. Results indicate significant (p<0...
January 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28078369/effectiveness-of-integrated-best-management-practices-on-mitigation-of-atrazine-and-metolachlor-in-an-agricultural-lake-watershed
#4
Richard Lizotte, Martin Locke, Ronald Bingner, R Wade Steinriede, Sammie Smith
The study examined the influence of land-use (cropping patterns) and integrated agricultural best management practices (BMPs) on spring herbicide levels in an agricultural watershed. Atrazine and metolachlor were applied for weed control during spring of 1998-2002, 2005, and 2007-2013. Watershed-wide mass of applied herbicides ranged from 12.7 to 209.2 g atrazine and 10.9-302.2 g metolachlor with greatest application during 1998, 2009-2010 (atrazine) and 2007-2013 (metolachlor). Spring herbicide concentrations in Beasley Lake water ranged from below detection to 3...
January 11, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28073478/mitigating-cyanobacterial-harmful-algal-blooms-in-aquatic-ecosystems-impacted-by-climate-change-and-anthropogenic-nutrients
#5
REVIEW
Hans W Paerl, Wayne S Gardner, Karl E Havens, Alan R Joyner, Mark J McCarthy, Silvia E Newell, Boqiang Qin, J Thad Scott
Mitigating the global expansion of cyanobacterial harmful blooms (CyanoHABs) is a major challenge facing researchers and resource managers. A variety of traditional (e.g., nutrient load reduction) and experimental (e.g., artificial mixing and flushing, omnivorous fish removal) approaches have been used to reduce bloom occurrences. Managers now face the additional effects of climate change on watershed hydrologic and nutrient loading dynamics, lake and estuary temperature, mixing regime, internal nutrient dynamics, and other factors...
April 2016: Harmful Algae
https://www.readbyqxmd.com/read/28065545/geochemical-isotopic-composition-in-the-loess-plateau-and-corresponding-source-analyses-a-case-study-of-china-s-yangjuangou-catchment
#6
Yafeng Wang, Liding Chen, Yang Gao, Shibo Chen, Weiliang Chen, Zhuo Hao, Junjie Jia, Ning Han
Isotopic fractionation technology is widely used in identifying sources and the speciation of geochemical isotopic elements. With the increase in human activity, geochemical element transport by soil erosion has become the most critical environmental problem in the Loess Plateau, so tracing the geochemical element source would help in the identification and management of local soil erosion. In this study, we investigated the spatial distribution of carbon (C), nitrogen (N), oxygen (O), and hydrogen (H) isotopes in water and then further analyzed (13)C and (15)N in soil and vegetation to better understand the C and N sources and their biogeochemical cycling function in the Loess Plateau...
January 5, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28052389/infectious-hematopoietic-necrosis-virus-virological-and-genetic-surveillance-2000-2012
#7
Rachel Breyta, Ilana Brito, Gael Kurath, Shannon LaDeau
Surveillance records of the acute RNA pathogen of Pacific salmonid fish infectious hematopoietic necrosis virus are combined for the first time to enable landscape-level ecological analyses and modeling. The study area is the freshwater ecosystems of the large Columbia River watershed in the U.S. states of Washington, Oregon, and Idaho, as well as coastal rivers in Washington and Oregon. The study period is 2000-2012, and records were contributed by all five resource management agencies that operate conservation hatcheries in the study area...
January 2017: Ecology
https://www.readbyqxmd.com/read/28043701/unconventional-oil-and-gas-spills-materials-volumes-and-risks-to-surface-waters-in-four-states-of-the-u-s
#8
Kelly O Maloney, Sharon Baruch-Mordo, Lauren A Patterson, Jean-Philippe Nicot, Sally A Entrekin, Joseph E Fargione, Joseph M Kiesecker, Kate E Konschnik, Joseph N Ryan, Anne M Trainor, James E Saiers, Hannah J Wiseman
Extraction of oil and gas from unconventional sources, such as shale, has dramatically increased over the past ten years, raising the potential for spills or releases of chemicals, waste materials, and oil and gas. We analyzed spill data associated with unconventional wells from Colorado, New Mexico, North Dakota and Pennsylvania from 2005 to 2014, where we defined unconventional wells as horizontally drilled into an unconventional formation. We identified materials spilled by state and for each material we summarized frequency, volumes and spill rates...
December 30, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/28040221/spatial-patterns-and-origins-of-heavy-metals-in-sheyang-river-catchment-in-jiangsu-china-based-on-geographically-weighted-regression
#9
Shan-Shan Wu, Hao Yang, Fei Guo, Rui-Ming Han
Multivariate statistical analyses combined with geographically weighted regression (GWR) were used to identify spatial variations of heavy metals in sediments and to examine relationships between metal pollution and land use practices in watersheds, including urban land, agriculture land, forest and water bodies. Seven metals (Cu, Zn, Pb, Cr, Ni, Mn and Fe) of sediments were measured at 31 sampling sites in Sheyang River. Most metals were under a certain degree enrichment based on the enrichment factors. Cluster analysis grouped all sites into four statistically significant cluster, severely contaminated areas were concentrated in areas with intensive human activities...
December 28, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/28030551/dynamic-changes-of-soil-surface-organic-carbon-under-different-mulching-practices-in-citrus-orchards-on-sloping-land
#10
Chiming Gu, Yi Liu, Ibrahim Mohamed, Runhua Zhang, Xiao Wang, Xinxin Nie, Min Jiang, Margot Brooks, Fang Chen, Zhiguo Li
Mulching management has been used in many places all over the world to improve agricultural sustainability. However, the cycling of carbon in the soil under applications of mulch on sloping arable land is not yet fully understood. A four-year field experiment was carried out in Xiaofuling watershed of Danjiangkou reservoir in China. The object was to evaluate the effects of the application of straw mulch (ST) and grass mulch (GT) on dynamic changes in soil organic carbon and its fractions. Results showed that mulch applied on the soil surface increased the contents of SOC and its active fractions in the soil...
2016: PloS One
https://www.readbyqxmd.com/read/28029480/sediment-source-identification-and-load-prediction-in-a-mixed-use-piedmont-watershed-south-carolina
#11
Kerry McCarney-Castle, Tristan M Childress, Christian R Heaton
Many streams in the Piedmont region of the southeastern United States transport a disproportionately large amount of suspended sediment in response to moderately increased streamflows. Transport and deposition of excess sediment affect the stability of the channel and the health of the biological community; therefore, identifying the main source(s) of sediment and assessing the relationships between source, transport, and streamflow are critical to aquatic life and habitat management, dynamic equilibrium preservation, and development of feasible mitigation scenarios...
October 28, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/28028479/impacts-of-land-use-management-on-ecosystem-services-and-biodiversity-an-agent-based-modelling-approach
#12
Thomas J Habib, Scott Heckbert, Jeffrey J Wilson, Andrew J K Vandenbroeck, Jerome Cranston, Daniel R Farr
The science of ecosystem service (ES) mapping has become increasingly sophisticated over the past 20 years, and examples of successfully integrating ES into management decisions at national and sub-national scales have begun to emerge. However, increasing model sophistication and accuracy-and therefore complexity-may trade-off with ease of use and applicability to real-world decision-making contexts, so it is vital to incorporate the lessons learned from implementation efforts into new model development. Using successful implementation efforts for guidance, we developed an integrated ES modelling system to quantify several ecosystem services: forest timber production and carbon storage, water purification, pollination, and biodiversity...
2016: PeerJ
https://www.readbyqxmd.com/read/28017419/integrating-remote-sensing-with-nutrient-management-plans-to-calculate-nitrogen-parameters-for-swine-cafos-at-the-sprayfield-and-sub-watershed-scales
#13
Elizabeth C Christenson, Marc L Serre
North Carolina (NC) regulates swine concentrated animal feeding operations (CAFOs) using five-year nutrient management plans (NMPs) requiring the plant available nitrogen sprayed (PANspray) to be less than that utilized by crops (PANcrops), i.e. the PAN balance (defined as PANbal=PANspray-PANcrops) remains negative, which avoids over-spraying liquid effluent onto crops. Objectives of this research are first to characterize Duplin County sprayfields and PANbal by creating the first, open-source sprayfield spatial database created for swine CAFOs in NC (for Duplin County)...
December 22, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/28017417/an-enhanced-export-coefficient-based-optimization-model-for-supporting-agricultural-nonpoint-source-pollution-mitigation-under-uncertainty
#14
Qiangqiang Rong, Yanpeng Cai, Bing Chen, Wencong Yue, Xin'an Yin, Qian Tan
In this research, an export coefficient based dual inexact two-stage stochastic credibility constrained programming (ECDITSCCP) model was developed through integrating an improved export coefficient model (ECM), interval linear programming (ILP), fuzzy credibility constrained programming (FCCP) and a fuzzy expected value equation within a general two stage programming (TSP) framework. The proposed ECDITSCCP model can effectively address multiple uncertainties expressed as random variables, fuzzy numbers, pure and dual intervals...
December 22, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/28013474/use-of-continuous-monitoring-to-assess-stream-nitrate-flux-and-transformation-patterns
#15
Christopher Jones, Sea-Won Kim, Keith Schilling
Delivery of nitrogen from farmed fields to the stream network is an ongoing water quality issue in central North America and other parts of the world. Although fertilization and other farming practices have been refined to produce environmental improvements, stemming loss of nitrogen, especially in the soluble nitrate form, is a problem that has seemingly defied solution. The Iowa Nutrient Reduction Strategy is a policy initiative designed to implement conservation and other farm management practices to produce reductions in nitrate loading...
January 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28002784/integrative-analysis-of-the-lake-simcoe-watershed-ontario-canada-as-a-socio-ecological-system
#16
Alex Neumann, Dong-Kyun Kim, Gurbir Perhar, George B Arhonditsis
Striving for long-term sustainability in catchments dominated by human activities requires development of interdisciplinary research methods to account for the interplay between environmental concerns and socio-economic pressures. In this study, we present an integrative analysis of the Lake Simcoe watershed, Ontario, Canada, as viewed from the perspective of a socio-ecological system. Key features of our analysis are (i) the equally weighted consideration of environmental attributes with socioeconomic priorities and (ii) the identification of the minimal number of key socio-hydrological variables that should be included in a parsimonious watershed management framework, aiming to establish linkages between urbanization trends and nutrient export...
March 1, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/27988182/the-importance-of-catchment-vegetation-for-alkalinity-phosphorus-burial-and-macrophytes-as-revealed-by-a-recent-paleolimnological-study-in-a-soft-water-lake
#17
Anna-Marie Klamt, Henning S Jensen, Morten F Mortensen, Norman Schreiber, Kasper Reitzel
The land use within a catchment may markedly affect the environmental conditions in a lake and the storage capability of its sediments. This study investigated how changes in the dominant catchment vegetation (from local stands of deciduous trees over extensive heathland with some agriculture to mainly coniferous forest) occurring during the last ca. 200years were reflected in the sediments of a soft water lake and how these changes influenced the lake ecosystem. Pollen, macrofossils, metals, different phosphorus (P) forms, organic matter, carbon and nitrogen contents were determined in short sediment cores...
December 14, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27943156/a-geochemical-approach-to-the-restoration-plans-for-the-odiel-river-basin-sw-spain-a-watershed-deeply-polluted-by-acid-mine-drainage
#18
Francisco Macías, Rafael Pérez-López, Manuel A Caraballo, Aguasanta M Sarmiento, Carlos R Cánovas, Jose M Nieto, Manuel Olías, Carlos Ayora
The Odiel River Basin (SW Spain) drains the central part of the Iberian Pyrite Belt (IPB), a world-class example of sulfide mining district and concomitantly of acid mine drainage (AMD) pollution. The severe AMD pollution and the incipient state of remediation strategies implemented in this region, coupled with the proximity of the deadline for compliance with the European Water Framework Directive (WFD), urge to develop a restoration and water resources management strategy. Furthermore, despite the presence of some reservoirs with acid waters in the Odiel basin, the construction of the Alcolea water reservoir has already started...
December 10, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27939775/potential-of-an-outranking-multi-criteria-approach-to-support-the-participatory-assessment-of-land-management-actions
#19
Anahí Ocampo-Melgar, Susana Bautista, J Edward deSteiguer, Barron J Orr
We evaluated the potential of an outranking Multi-Criteria Decision Analysis approach for assisting in the participatory assessment of dryland management actions implemented in the San Simon watershed, in southeastern Arizona, USA. We compared an outranking-facilitated assessment of actions with a simple and direct (baseline) ranking of the same actions by the participating stakeholders in terms of: 1) internal homogeneity of each assessment approach, (2) similarity of individual assessments between methods, and (3) effects of the use of implicit/explicit assessment criteria...
December 7, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27939083/long-term-diffuse-phosphorus-pollution-dynamics-under-the-combined-influence-of-land-use-and-soil-property-variations
#20
Haobo Huang, Wei Ouyang, Haotian Wu, Hongbin Liu, Critto Andrea
Analyses of the spatial-temporal distribution of diffuse pollution in agricultural regions are essential to the sustained management of water resources. Although nutrients, such as phosphorus fertilizers, can promote crop growth while improving soil fertility, excessive nutrient inputs can produce diffuse pollution, which may results in water quality degradation. The objective of this paper is to employ the SWAT (Soil and Water Assessment Tool) to estimate diffuse P effects on temporal and spatial distributions for a typical agricultural watershed and to identify the conjunct and independent influences of long-term land use and soil properties variation on diffuse P...
February 1, 2017: Science of the Total Environment
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