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https://www.readbyqxmd.com/read/28639023/uncertainties-in-vegetated-buffer-strip-function-in-controlling-phosphorus-export-from-agricultural-land-in-the-canadian-prairies
#1
Reza Habibiandehkordi, David A Lobb, Steve C Sheppard, Don N Flaten, Philip N Owens
Vegetated buffer strips (VBSs) are widely encouraged as a cost-effective strategy to address phosphorus (P) pollution associated with agricultural production. However, there is a lack of evidence in the effectiveness of these measures for tackling diffuse P pollution in cold-climate regions under concentrated runoff flow conditions. This research aimed to investigate the effects of VBSs on reducing P concentrations in surface runoff at three different watersheds in Manitoba, Canada. Surface runoff samples were collected in four sub-catchments from each watershed by installing paired weirs at 0...
June 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28633079/assessment-of-stormwater-runoff-management-practices-and-bmps-under-soil-sealing-a-study-case-in-a-peri-urban-watershed-of-the-metropolitan-area-of-rome-italy
#2
Fabio Recanatesi, Andrea Petroselli, Maria Nicolina Ripa, Antonio Leone
By 2006, almost 100,000 km(2) of EU soil (2.3% of the whole territory) had been sealed, with a per capita quota of 200 m(2) of sealed surface for each EU citizen. Italy, in 2016, recorded a soil sealing rate of 2.8% of the entire territory. In this context, the urban expansion which occurred in past decades is considered one of the main causes of the increase in flood frequency and intensity in small catchments, causing both social and financial damage. In the present paper, the positive impact of introducing Best Management Practices (BMPs) at urban scale is assessed, with particular regard to the decreasing of flood prone areas...
June 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28628823/drug-development-against-tuberculosis-impact-of-alkaloids
#3
REVIEW
Shardendu K Mishra, Garima Tripathi, Navneet Kishore, Rakesh K Singh, Archana Singh, Vinod K Tiwari
Despite of the advances made in the treatment and management, tuberculosis (TB) still remains one of main public health problem. The contrary effects of first and second-line anti-tuberculosis drugs have generated extended research interest in natural products in the hope of devising new antitubercular leads. Interestingly, plethoras of natural products have been discovered to exhibit activity towards various resistant strains of M. tuberculosis. Extensive applications of alkaloids in the field of therapeutics is well-established and nowday's researches being pursued to develop new potent drugs from natural sources for tuberculosis...
June 3, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28628820/river-flow-is-critical-for-vegetation-dynamics-lessons-from-multi-scale-analysis-in-a-hyper-arid-endorheic-basin
#4
Qin Shen, Guangyao Gao, Yihe Lü, Shuai Wang, Xiaohui Jiang, Bojie Fu
Knowledge of the spatio-temporal responses of vegetation dynamics to hydro-climatic factors is important to assess ecological restoration efforts in arid and semiarid areas. In this study, the vegetation dynamics during 2000-2015 were investigated in the downstream area of the Heihe River Basin (HRB) in Northwest China where an ecological water diversion project (EWDP) commenced in 2000. The spatio-temporal relationships between vegetation cover and climatic factors (precipitation and temperature) and available water resources (river flow and groundwater) were determined...
June 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28620711/evaluating-expected-outcomes-of-acid-remediation-in-an-intensively-mined-appalachian-watershed
#5
Andrew S Watson, George T Merovich, J Todd Petty, J Brady Gutta
Assessments of watershed-based restoration efforts are rare but are essential for the science of stream restoration to advance. We conducted a watershed scale assessment of Abram Creek before and after implementation of a watershed-based plan designed to maximize ecological recovery from acid mine drainage (AMD) impairment. We surveyed water chemistry, physical habitat, benthic macroinvertebrates, and fish community structure in three stream types: AMD-impacted (14 streams), AMD-treated (13 streams), and unimpaired reference (4 streams)...
July 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28600936/a-novel-technique-for-establishing-soil-topographic-index-thresholds-in-defining-hydrologically-sensitive-areas-in-landscapes
#6
Subhasis Giri, Zeyuan Qiu, Zhen Zhang
Hydrologically sensitive areas (HSAs) are useful for analyzing a watershed. However, correct delineation of HSAs is critical for conducting such analysis. Scientifically defensible methods for delineating HSAs are lacking. The objectives of this study are to identify threshold soil topographic indices (STIs) based on the relationship between the observed soil moisture and the calculated STI in two sites using a trellis plot approach, and validate the identified threshold STIs in delineating HSAs in 15 watersheds in North Central New Jersey based on a linear mixed modeling of the relationship between land use and water quality at the watershed and HSA scales...
June 7, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28589540/depletion-mapping-and-constrained-optimization-to-support-managing-groundwater-extraction
#7
Michael N Fienen, Kenneth R Bradbury, Maribeth Kniffin, Paul M Barlow
Groundwater models often serve as management tools to evaluate competing water uses including ecosystems, irrigated agriculture, industry, municipal supply, and others. Depletion potential mapping-showing the model-calculated potential impacts that wells have on stream baseflow-can form the basis for multiple potential management approaches in an oversubscribed basin. Specific management approaches can include scenarios proposed by stakeholders, systematic changes in well pumping based on depletion potential, and formal constrained optimization, which can be used to quantify the tradeoff between water use and stream baseflow...
June 6, 2017: Ground Water
https://www.readbyqxmd.com/read/28589455/terrestrially-derived-glomalin-related-soil-protein-quality-as-a-potential-ecological-indicator-in-a-peri-urban-watershed
#8
Xueyan Sui, Zhipeng Wu, Chen Lin, Shenglu Zhou
Glomalin, which sequesters substantial amounts of carbon, plays a critical role in sustaining terrestrial biome functions and contributes to the fate of many pollutants from terrestrial to aquatic ecosystems. Despite having focused on the amount of glomalin produced, very few attempts have been made to understand how landscapes and environmental conditions influence glomalin composition and characteristics. This study focused on glomalin-related soil protein (GRSP) exported as storm runoff including eroded sediment and water that was collected before flowing to surface waters in a peri-urban watershed...
July 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28577487/modeling-pesticide-diuron-loading-from-the-san-joaquin-watershed-into-the-sacramento-san-joaquin-delta-using-swat
#9
Huajin Chen, Yuzhou Luo, Christopher Potter, Patrick J Moran, Michael L Grieneisen, Minghua Zhang
Quantifying pesticide loading into the Sacramento-San Joaquin Delta of northern California is critical for water quality management in the region, and potentially useful for biological weed control planning. In this study, the Soil and Water Assessment Tool (SWAT) was applied to model streamflow, sediment, and pesticide diuron loading in the San Joaquin watershed, a major contributing area to the elevated pesticide levels in the downstream Delta. The Sequential Uncertainty Fitting version 2 (SUFI-2) algorithm was employed to perform calibration and uncertainty analysis...
May 16, 2017: Water Research
https://www.readbyqxmd.com/read/28575835/a-review-on-effectiveness-of-best-management-practices-in-improving-hydrology-and-water-quality-needs-and-opportunities
#10
REVIEW
Yaoze Liu, Bernard A Engel, Dennis C Flanagan, Margaret W Gitau, Sara K McMillan, Indrajeet Chaubey
Best management practices (BMPs) have been widely used to address hydrology and water quality issues in both agricultural and urban areas. Increasing numbers of BMPs have been studied in research projects and implemented in watershed management projects, but a gap remains in quantifying their effectiveness through time. In this paper, we review the current knowledge about BMP efficiencies, which indicates that most empirical studies have focused on short-term efficiencies, while few have explored long-term efficiencies...
May 30, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28575831/assessing-the-magnitude-of-potential-environmental-impacts-related-to-water-and-toxicity-in-the-peruvian-hyper-arid-coast-a-case-study-for-the-cultivation-of-grapes-for-pisco-production
#11
Ian Vázquez-Rowe, Jorge Renato Torres-García, Ana Lucía Cáceres, Gustavo Larrea-Gallegos, Isabel Quispe, Ramzy Kahhat
The environmental sustainability of the cultivation of grapes for the production of alcoholic beverages has been extensively analyzed in the literature from a Life Cycle Assessment perspective, although certain impact categories have been repeatedly neglected despite their importance, such as toxic emissions or the depletion of freshwater resources. Hence, the current study provides a detailed assessment of water footprint-related impact categories, including toxicity, for the cultivation of grapes for pisco production, an alcoholic beverage produced in coastal Peru in hyper-arid areas that suffer high levels of water scarcity...
May 30, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28549304/landowner-preferences-for-wetlands-conservation-programs-in-two-southern-ontario-watersheds
#12
Ryan Trenholm, Wolfgang Haider, Van Lantz, Duncan Knowler, Pascal Haegeli
Wetlands in the region of Southern Ontario, Canada have declined substantially from their historic area. Existing regulations and programs have not abated this decline. However, reversing this trend by protecting or restoring wetlands will increase the supply of important ecosystem services. In particular, these actions will contribute to moderating the impacts of extreme weather predicted to result from climate change as well as reducing phosphorous loads in Lake Erie and ensuing eutrophication. Since the majority of land in the region is privately owned, landowners can play an important role...
May 23, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28531796/spatially-explicit-modeling-of-multi-scale-drivers-of-aboveground-forest-biomass-and-water-yield-in-watersheds-of-the-southeastern-united-states
#13
Mukhtar Ahmed Ajaz Ahmed, Amr Abd-Elrahman, Francisco J Escobedo, Wendell P Cropper, Timothy A Martin, Nilesh Timilsina
Understanding ecosystem processes and the influence of regional scale drivers can provide useful information for managing forest ecosystems. Examining more local scale drivers of forest biomass and water yield can also provide insights for identifying and better understanding the effects of climate change and management on forests. We used diverse multi-scale datasets, functional models and Geographically Weighted Regression (GWR) to model ecosystem processes at the watershed scale and to interpret the influence of ecological drivers across the Southeastern United States (SE US)...
September 1, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28511353/assessment-of-water-retention-function-as-tool-to-improve-integrated-watershed-management-case-study-of-poprad-river-basin-slovakia
#14
Barbora Šatalová, Pavol Kenderessy
The presented study concentrates on assessing the ecosystem function of water retention. The water retention function is defined as the ability of the landscape to retain water, slow runoff and encourage water infiltration. The water retention function was expressed by calculating the hydric significance (HS) indicator. This method is based on scoring the individual input parameters according to their overall impact on watershed hydrology. The study was conducted on a sample area of Poprad River basin. The final results presented a spatial distribution of hydric function within the watershed classified according to its significance into four classes (from limited to excellent significance)...
December 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28511348/integrated-flood-hazard-assessment-based-on-spatial-ordered-weighted-averaging-method-considering-spatial-heterogeneity-of-risk-preference
#15
Yangfan Xiao, Shanzhen Yi, Zhongqian Tang
Flood is the most common natural hazard in the world and has caused serious loss of life and property. Assessment of flood prone areas is of great importance for watershed management and reduction of potential loss of life and property. In this study, a framework of multi-criteria analysis (MCA) incorporating geographic information system (GIS), fuzzy analytic hierarchy process (AHP) and spatial ordered weighted averaging (OWA) method was developed for flood hazard assessment. The factors associated with geographical, hydrological and flood-resistant characteristics of the basin were selected as evaluation criteria...
December 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28507148/correction-for-hobbie-et-al-contrasting-nitrogen-and-phosphorus-budgets-in-urban-watersheds-and-implications-for-managing-urban-water-pollution
#16
(no author information available yet)
No abstract text is available yet for this article.
May 16, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28503260/dynamics-of-hexavalent-chromium-in-four-types-of-aquaculture-ponds-and-its-effects-on-the-morphology-and-behavior-of-cultured-clarias-gariepinus-burchell-1822
#17
Moshood Keke Mustapha
Hexavalent chromium is a bio accumulative toxic metal in water and fish. It enters aquaculture ponds mainly through anthropogenic sources. Hexavalent chromium concentrations and its effects on the morphology and behavior of Clarias gariepinus were investigated from four aquaculture ponds for 12 weeks. Chromium was measured using diphenyl carbohdrazide method; alkalinity and hardness were measured using colometric method and analyzed with Bench Photometer. Temperature and pH were measured using pH/EC/TDS/Temp combined tester...
April 2017: Toxicological Research
https://www.readbyqxmd.com/read/28499222/the-actual-role-of-oxygen-deficit-in-the-linkage-of-the-water-quality-and-benthic-phosphorus-release-potential-implications-for-lake-restoration
#18
Olga Tammeorg, Tõnu Möls, Juha Niemistö, Heidi Holmroos, Jukka Horppila
Human activities in watersheds have resulted in huge accumulations of phosphorus (P) in sediments that have subsequently hindered restoration efforts of lake water quality managers worldwide. Much controversy exists about the factors that control the release of P from sediments (internal P loading). One of the main debates concerns the role of oxygen deficit (anoxia) in the regulation of water quality. Our results based on a comprehensive set of lakes worldwide demonstrate that internal P loading (IPtot) plays a significant role in water quality regulation...
December 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28499221/a-water-quality-management-strategy-for-regionally-protected-water-through-health-risk-assessment-and-spatial-distribution-of-heavy-metal-pollution-in-3-marine-reserves
#19
Yinan Zhang, Chunli Chu, Tong Li, Shengguo Xu, Lei Liu, Meiting Ju
Severe water pollution and resource scarcity is a major problem in China, where it is necessary to establish water quality-oriented monitoring and intelligent watershed management. In this study, an effective watershed management method is explored, in which water quality is first assessed using the heavy metal pollution index and the human health risk index, and then by classifying the pollution and management grade based on cluster analysis and GIS visualization. Three marine reserves in Tianjin were selected and analyzed, namely the Tianjin Ancient Coastal Wetland National Nature Reserve (Qilihai Natural Reserve), the Tianjin DaShentang Oyster Reef National Marine Special Reserve (DaShentang Reserve), and the Tianjin Coastal Wetland National Marine Special Reserve (BinHai Wetland Reserve) which is under construction...
December 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28488149/identification-of-water-quality-management-policy-of-watershed-system-with-multiple-uncertain-interactions-using-a-multi-level-factorial-risk-inference-based-possibilistic-probabilistic-programming-approach
#20
Jing Liu, Yongping Li, Guohe Huang, Haiyan Fu, Junlong Zhang, Guanhui Cheng
In this study, a multi-level-factorial risk-inference-based possibilistic-probabilistic programming (MRPP) method is proposed for supporting water quality management under multiple uncertainties. The MRPP method can handle uncertainties expressed as fuzzy-random-boundary intervals, probability distributions, and interval numbers, and analyze the effects of uncertainties as well as their interactions on modeling outputs. It is applied to plan water quality management in the Xiangxihe watershed. Results reveal that a lower probability of satisfying the objective function (θ) as well as a higher probability of violating environmental constraints (q i ) would correspond to a higher system benefit with an increased risk of violating system feasibility...
June 2017: Environmental Science and Pollution Research International
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