LIVIVO - Search results -

Search results

Result 1 - 10 of total 393

Search options

Article: Impacts of environmental stressors on nonpoint source pollution in intensively managed hydrologic systems

Botero-Acosta, A / Chu, M.L / Huang, C

Journal of hydrology. 2019 Dec., v. 579

2019

Abstract: Agricultural practices intended to increase productivity can adversely affect our soil and water resources. Expected changes in climate and other social pressure are anticipated to exacerbate these impacts jeopardizing the sustainability of the agro- ... ...

Abstract	Agricultural practices intended to increase productivity can adversely affect our soil and water resources. Expected changes in climate and other social pressure are anticipated to exacerbate these impacts jeopardizing the sustainability of the agro-ecosystems. Watershed Management Practices (WMPs) are meant to achieve a rational use of resources as well as enhance ecosystem resilience to climate change. However, the effectiveness of WMPs depends on the complex interactions between processes occurring across the watershed. The objective of this study was to simulate the impacts of WMPs and projected climate on the sediment and nitrate-nitrogen (NO3-N) stream loads in an intensively managed watershed. The modeling framework was developed with the physically-based distributed model Mike SHE for the Upper Sangamon River Basin (USRB), an agricultural watershed in central Illinois. The fate and transport of sediment and NO3-N in the watershed and rivers was simulated using a generic advection-dispersion equation (ADE) with NO3-N and sediment as the main species. Results showed that non-structural WMPs, such as crop rotation and cover crops, presented the highest reductions of simulated NO3-N and sediment load, respectively, while structural WMPs had higher area-efficiency performance. On the other hand, climate conditions had a strong impact on the transport of both pollutants due to water fluxes alterations especially for a future dry climate scenario. Sediment transport was shown to be more sensitive to climate given that rainfall is one of the main drivers of the erosion processes. Outcomes from this research will give a more comprehensive approach toward understanding the impacts of environmental stressors at a watershed scale, and how they may be propagated to ecological systems.
Keywords	agricultural watersheds ; agroecosystems ; climate change ; climatic factors ; cover crops ; crop rotation ; dry climates ; ecological resilience ; equations ; models ; nitrate nitrogen ; nonpoint source pollution ; pollutants ; pollution load ; rain ; rivers ; sediment transport ; sediment yield ; sediments ; soil ; streams ; watershed management ; Illinois
Language	English
Dates of publication	2019-12
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	1473173-3
ISSN	1879-2707 ; 0022-1694
ISSN (online)	1879-2707
ISSN	0022-1694
DOI	10.1016/j.jhydrol.2019.124056
Database	NAL-Catalogue (AGRICOLA)

Order via subito

This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

Article ; Online: Evaluating the impacts of agricultural land management practices on water resources: A probabilistic hydrologic modeling approach.

Prada, A F / Chu, M L / Guzman, J A / Moriasi, D N

Journal of environmental management

2017 Volume 193, Page(s) 512–523

Abstract: Evaluating the effectiveness of agricultural land management practices in minimizing environmental impacts using models is challenged by the presence of inherent uncertainties during the model development stage. One issue faced during the model ... ...

Abstract	Evaluating the effectiveness of agricultural land management practices in minimizing environmental impacts using models is challenged by the presence of inherent uncertainties during the model development stage. One issue faced during the model development stage is the uncertainty involved in model parameterization. Using a single optimized set of parameters (one snapshot) to represent baseline conditions of the system limits the applicability and robustness of the model to properly represent future or alternative scenarios. The objective of this study was to develop a framework that facilitates model parameter selection while evaluating uncertainty to assess the impacts of land management practices at the watershed scale. The model framework was applied to the Lake Creek watershed located in southwestern Oklahoma, USA. A two-step probabilistic approach was implemented to parameterize the Agricultural Policy/Environmental eXtender (APEX) model using global uncertainty and sensitivity analysis to estimate the full spectrum of total monthly water yield (WYLD) and total monthly Nitrogen loads (N) in the watershed under different land management practices. Twenty-seven models were found to represent the baseline scenario in which uncertainty of up to 29% and 400% in WYLD and N, respectively, is plausible. Changing the land cover to pasture manifested the highest decrease in N to up to 30% for a full pasture coverage while changing to full winter wheat cover can increase the N up to 11%. The methodology developed in this study was able to quantify the full spectrum of system responses, the uncertainty associated with them, and the most important parameters that drive their variability. Results from this study can be used to develop strategic decisions on the risks and tradeoffs associated with different management alternatives that aim to increase productivity while also minimizing their environmental impacts.
MeSH term(s)	Agriculture ; Conservation of Natural Resources ; Hydrology ; Models, Theoretical ; Water Resources
Language	English
Publishing date	2017-05-15
Publishing country	England
Document type	Journal Article
ZDB-ID	184882-3
ISSN	1095-8630 ; 0301-4797
ISSN (online)	1095-8630
ISSN	0301-4797
DOI	10.1016/j.jenvman.2017.02.048
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

In stock of ZB MED Bonn / Germany

Z 7556: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾

Article: Evaluating the impacts of agricultural land management practices on water resources: A probabilistic hydrologic modeling approach

Prada, A.F / Chu, M.L / Guzman, J.A / Moriasi, D.N

Elsevier Ltd Journal of environmental management. 2017 May 15, v. 193

2017

Abstract	Evaluating the effectiveness of agricultural land management practices in minimizing environmental impacts using models is challenged by the presence of inherent uncertainties during the model development stage. One issue faced during the model development stage is the uncertainty involved in model parameterization. Using a single optimized set of parameters (one snapshot) to represent baseline conditions of the system limits the applicability and robustness of the model to properly represent future or alternative scenarios. The objective of this study was to develop a framework that facilitates model parameter selection while evaluating uncertainty to assess the impacts of land management practices at the watershed scale. The model framework was applied to the Lake Creek watershed located in southwestern Oklahoma, USA. A two-step probabilistic approach was implemented to parameterize the Agricultural Policy/Environmental eXtender (APEX) model using global uncertainty and sensitivity analysis to estimate the full spectrum of total monthly water yield (WYLD) and total monthly Nitrogen loads (N) in the watershed under different land management practices. Twenty-seven models were found to represent the baseline scenario in which uncertainty of up to 29% and 400% in WYLD and N, respectively, is plausible. Changing the land cover to pasture manifested the highest decrease in N to up to 30% for a full pasture coverage while changing to full winter wheat cover can increase the N up to 11%. The methodology developed in this study was able to quantify the full spectrum of system responses, the uncertainty associated with them, and the most important parameters that drive their variability. Results from this study can be used to develop strategic decisions on the risks and tradeoffs associated with different management alternatives that aim to increase productivity while also minimizing their environmental impacts.
Keywords	agricultural policy ; environmental impact ; hydrologic models ; lakes ; land cover ; land management ; nitrogen ; pastures ; risk ; streams ; uncertainty ; watersheds ; winter wheat ; Oklahoma
Language	English
Dates of publication	2017-0515
Size	p. 512-523.
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	184882-3
ISSN	1095-8630 ; 0301-4797
ISSN (online)	1095-8630
ISSN	0301-4797
DOI	10.1016/j.jenvman.2017.02.048
Database	NAL-Catalogue (AGRICOLA)

In stock of ZB MED Bonn / Germany

Z 7556: Show issues

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Details ▾
- See ZB MED holdings
- Order with fees

Article: Impacts of urbanization on river flow frequency: A controlled experimental modeling-based evaluation approach

Chu, M.L / A. Ghulam / J.A. Guzman / J.H. Knouft / Z. Pan

Elsevier B.V. Journal of hydrology. 2013 July 12, v. 495

2013

Abstract: Changes in land use are likely to cause a non-linear response in watershed hydrology. Specifically, small increases in urban expansion may greatly increase surface runoff while decreasing infiltration, impacting aquifer recharge and changing streamflow ... ...

Abstract	Changes in land use are likely to cause a non-linear response in watershed hydrology. Specifically, small increases in urban expansion may greatly increase surface runoff while decreasing infiltration, impacting aquifer recharge and changing streamflow regimes. Quantifying the effects of urbanization on streamflow is crucial to the development of plans to mitigate the effects of anthropogenic changes on watershed processes. This study focused on quantifying the potential effects of varying degrees of urban expansion on the frequency of discharge, velocity, and water depth using the physically-based watershed model, MIKE-SHE, and the 1D hydrodynamic river model, MIKE-11. Five land cover scenarios corresponding to varying degrees of urban expansion were used to determine the sensitivity of these flow variables in the Big River watershed located in east central Missouri, in which urban areas have increased by more than 300% in the last 15years (1992–2006). Differences in the frequency distributions of the flow variables under each scenario were quantified using a Smirnov test. Results indicated a potential increase in the frequency of high flow events to more than 140% while decreasing the frequency of low flow events by up to 100% if the current rate of urbanization continues. In general, the frequency of low flow events decreased as urban expansion increased while the frequency of average and high-flow events increased as urbanization increased. An increase in frequency of high-flow events is expected to impact the safety of structures, sediment load, water quality, and the riparian ecosystem. This research will be valuable to assess mitigation strategies in order to protect the ecosystem, infrastructure, and livelihood in the watershed where urban development is inevitable.
Keywords	anthropogenic activities ; aquifers ; ecosystems ; hydrologic models ; infrastructure ; land cover ; land use change ; livelihood ; pollution load ; risk reduction ; rivers ; runoff ; stream flow ; urban areas ; urbanization ; water quality ; watershed hydrology ; watersheds ; Missouri
Language	English
Dates of publication	2013-0712
Size	p. 1-12.
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	1473173-3
ISSN	0022-1694
ISSN	0022-1694
DOI	10.1016/j.jhydrol.2013.04.051
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Article: A simplified approach for simulating changes in beach habitat due to the combined effects of long-term sea level rise, storm erosion, and nourishment

Chu, M.L / G.A. Kiker / I. Linkov / J.A. Guzman / R. MuÃ±oz-Carpena

Environmental modelling & software. 2014 Feb., v. 52

2014

Abstract: Better understanding of the vulnerability of coastal habitats to sea level rise and major storm events are aided by the use of simulation models. Since coastal habitats also undergo frequent nourishment restoration works in order to maintain their ... ...

Abstract	Better understanding of the vulnerability of coastal habitats to sea level rise and major storm events are aided by the use of simulation models. Since coastal habitats also undergo frequent nourishment restoration works in order to maintain their viability, vulnerability models must be able to assess the combined effects of sea level rise, storm surge, and beach nourishment. The Sea Level Affecting Marshes Model (SLAMM) was modified and applied to quantify the changes in the beach area in a 5-km stretch of beach in Santa Rosa Island, Florida due to these combined effects. A new methodology to estimate spatial erosion patterns was developed based on measured erosion during three historic storm events representing a wide range of storm intensities over the study area (named storms Ivan (H5), Dennis (H4), and Katrina (TS)). Future major storms over the 2012-2100 period were generated based on the frequency distribution of historic storms using 4000 simulations to account for uncertainty in the storms temporal distribution. Potential effects of individual, successive, and random storms occurring over the area under 0-1.5 m nourishment schemes were evaluated. The risk of losing the beach habitat in 90 years for different scenarios is studied based on probability distribution contours constructed with the model results. Simulation results suggest that without nourishment, a major storm with a category of tropical storm or higher will reduce the beach at the end of the period by 97-100%. This loss can be reduced to 60% by maintaining a 1-m beach elevation and can further be reduced to 34% with 1.5 m beach nourishment.
Keywords	computer software ; environmental models ; habitats ; long term effects ; marshes ; methodology ; probability distribution ; risk ; sea level ; simulation models ; storms ; uncertainty ; viability ; Florida
Language	English
Dates of publication	2014-02
Size	p. 111-120.
Publishing place	Elsevier Ltd
Document type	Article
ISSN	1364-8152
DOI	10.1016/j.envsoft.2013.10.020
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article: [Diagnostic value of cell free

Shou, J / Xie, Q M / Long, Z L / Wu, Q / Gan, C Y / Lin, Y S / Huang, P / Tu, G L / Chu, M L / Yi, W

Zhonghua bing li xue za zhi = Chinese journal of pathology

2018 Volume 47, Issue 6, Page(s) 465–467

Language	Chinese
Publishing date	2018-07-06
Publishing country	China
Document type	Journal Article
ZDB-ID	784533-9
ISSN	0529-5807
ISSN	0529-5807
DOI	10.3760/cma.j.issn.0529-5807.2018.06.016
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.B 2958: Show issues			Location: Je nach Verfügbarkeit (siehe Angabe bei Bestand) bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular ab Jg. 2022: Lesesaal (EG)
Zs.MO 360: Show issues

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article: A tool for mapping and spatio-temporal analysis of hydrological data

Guzman, J.A / Moriasi, D.N / Chu, M.L / Starks, P.J / Steiner, J.L / Gowda, P.H

Environmental modelling & software. 2013 Oct., v. 48

2013

Abstract: There is a need in water sciences for computational tools to integrate large spatially distributed datasets to provide insight into the spatial and temporal domains of the data while allowing visualization, analysis in the spatial and temporal dimensions, ...

Abstract	There is a need in water sciences for computational tools to integrate large spatially distributed datasets to provide insight into the spatial and temporal domains of the data while allowing visualization, analysis in the spatial and temporal dimensions, data metrics, and pattern recognition in the same application. Spatial and temporal variability of hydrological processes as well as the associated phenomena transport is better represented in high spatio-temporal resolution datasets. A conceptual data model and analysis tool, SPELLmap, was developed at the USDA Agricultural Research Service, Grazinglands Research Laboratory using the Delphi programming language to rapidly process, manipulate, analyze, and visualize large geo-located datasets. SPELLmap integrates the spatial and temporal domains of hydrological data to perform analyses in space and time while providing data metrics. SPELLmap has the capacity to represent three or four dimensional problems using a layer data structure. Three examples to illustrate SPELLmap functionalities were provided for the raster and raster-to-network domains. SPELLmap can be used for data interpolation, visualization, gridding, pattern recognition, and data metrics in integrated environmental modeling problems.
Keywords	Agricultural Research Service ; computer software ; data collection ; environmental models ; grazing lands ; hydrologic data ; temporal variation
Language	English
Dates of publication	2013-10
Size	p. 163-170.
Publishing place	Elsevier Ltd
Document type	Article
ISSN	1364-8152
DOI	10.1016/j.envsoft.2013.06.014
Database	NAL-Catalogue (AGRICOLA)

Order via subito

Inter-library loan at ZB MED

Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

Article ; Online: Fibulin-2 is involved in early extracellular matrix development of the outgrowing mouse mammary epithelium.

Olijnyk, D / Ibrahim, A M / Ferrier, R K / Tsuda, T / Chu, M-L / Gusterson, B A / Stein, T / Morris, J S

Cellular and molecular life sciences : CMLS

2014 Volume 71, Issue 19, Page(s) 3811–3828

Abstract: Cell-matrix interactions control outgrowth of mammary epithelium during puberty and pregnancy. We demonstrate here that the glycoprotein fibulin-2 (FBLN2) is strongly associated with pubertal and early pregnant mouse mammary epithelial outgrowth. FBLN2 ... ...

Abstract	Cell-matrix interactions control outgrowth of mammary epithelium during puberty and pregnancy. We demonstrate here that the glycoprotein fibulin-2 (FBLN2) is strongly associated with pubertal and early pregnant mouse mammary epithelial outgrowth. FBLN2 was specifically localized to the cap cells of the terminal end buds during puberty and to myoepithelial cells during very early pregnancy (days 2-3) even before morphological changes to the epithelium become microscopically visible, but was down-regulated thereafter. Exposure to exogenous oestrogen (E2) or E2 plus progesterone (P) increased Fbln2 mRNA expression in the pubertal gland, indicating hormonal control. FBLN2 was co-expressed and co-localised with the proteoglycan versican (VCAN) and co-localised with laminin (LN), while over-expression of FBLN2 in HC-11 cells increased cell adhesion to several extracellular matrix proteins including LN and fibronectin, but not collagens. Mammary glands from Fbln2 knockout mice showed no obvious phenotype but increased fibulin-1 (FBLN1) staining was detected, suggesting a compensatory mechanism by other fibulin family members. We hypothesise that similar to embryonic aortic smooth muscle development, FBLN2 and VCAN expression alters the cell-matrix interaction to allow mammary ductal outgrowth and development during puberty and to enable epithelial budding during pregnancy.
MeSH term(s)	Animals ; Calcium-Binding Proteins/deficiency ; Calcium-Binding Proteins/genetics ; Calcium-Binding Proteins/metabolism ; Cell Movement/drug effects ; Cells, Cultured ; Estrogens/pharmacology ; Extracellular Matrix/metabolism ; Extracellular Matrix Proteins/deficiency ; Extracellular Matrix Proteins/genetics ; Extracellular Matrix Proteins/metabolism ; Female ; Fibronectins/metabolism ; Laminin/analysis ; Laminin/metabolism ; Male ; Mammary Glands, Animal/cytology ; Mammary Glands, Animal/drug effects ; Mammary Glands, Animal/metabolism ; Mice ; Mice, Inbred C57BL ; Mice, Knockout ; Pregnancy ; Progesterone/pharmacology ; RNA, Messenger/metabolism ; Versicans/analysis ; Versicans/metabolism
Chemical Substances	Calcium-Binding Proteins ; Estrogens ; Extracellular Matrix Proteins ; Fibronectins ; Laminin ; RNA, Messenger ; fibulin ; fibulin 2 ; Versicans (126968-45-4) ; Progesterone (4G7DS2Q64Y)
Language	English
Publishing date	2014-02-13
Publishing country	Switzerland
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	1358415-7
ISSN	1420-9071 ; 1420-682X
ISSN (online)	1420-9071
ISSN	1420-682X
DOI	10.1007/s00018-014-1577-4
Database	MEDical Literature Analysis and Retrieval System OnLINE

Full text online

Accessible to users with ZB MED library card

In stock of ZB MED Cologne/Königswinter

Zs.A 195: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
Jg. 1995 - 2021: Lesesall (1.OG)
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾

Article: Continuing care of a total laryngectomy patient.

Chu, M L

Home healthcare nurse

1985 Volume 3, Issue 4, Page(s) 37–39

MeSH term(s)	Community Health Nursing ; Continuity of Patient Care ; Humans ; Laryngeal Neoplasms/surgery ; Laryngectomy/nursing ; Male ; Middle Aged ; Patient Discharge ; Self Care
Language	English
Publishing date	1985-07
Publishing country	United States
Document type	Case Reports ; Journal Article
ZDB-ID	605757-3
ISSN	1539-0713 ; 0884-741X
ISSN (online)	1539-0713
ISSN	0884-741X
DOI	10.1097/00004045-198507000-00009
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.B 2710: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

Article: The rhesus blood group in Taiwan.

Chu, M L

Taiwan yi xue hui za zhi. Journal of the Formosan Medical Association

1984 Volume 83, Issue 8, Page(s) 796–799

MeSH term(s)	Asian Continental Ancestry Group ; Gene Frequency ; Humans ; Phenotype ; Rh-Hr Blood-Group System/genetics ; Taiwan
Chemical Substances	Rh-Hr Blood-Group System
Language	English
Publishing date	1984-08
Publishing country	China (Republic : 1949- )
Document type	Journal Article
ZDB-ID	604019-6
ISSN	0371-7682
ISSN	0371-7682
Database	MEDical Literature Analysis and Retrieval System OnLINE

In stock of ZB MED Cologne/Königswinter

Zs.B 1041: Show issues

Location:
Je nach Verfügbarkeit (siehe Angabe bei Bestand)
bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
ab Jg. 2022: Lesesaal (EG)

Order via subito

Details ▾
- See ZB MED holdings
- Order with fees

To top

More links

Kategorien

Order via subito

Full text online

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

In stock of ZB MED Bonn / Germany

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

Order via subito

Inter-library loan at ZB MED

Full text online

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito

More links

Kategorien

In stock of ZB MED Cologne/Königswinter

Order via subito