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Articles 1 - 23 of 23
Full-Text Articles in Physical Sciences and Mathematics
Thermodynamic Simulation Of Carbonitride Precipitation In Micro-Alloyed Steel, Weigang Li, Yang Wei, Liu Chao, Baokang Yan
Thermodynamic Simulation Of Carbonitride Precipitation In Micro-Alloyed Steel, Weigang Li, Yang Wei, Liu Chao, Baokang Yan
Journal of System Simulation
Abstract: A mathematical model for calculating the precipitation of carbonitride in the process of hot rolling of composite micro-alloyed steel is established, and the interaction between the carbonitride and AlN is considered. In view of the difficulties of the thermodynamic model that the variables are multiple, the equations are nonlinear and the boundary conditions are determined difficultly, the Newton-Raphson numerical algorithm characterized by coupled problem is adopted. The precipitation starting temperature and precipitation sequence of carbonitride and AlN at different compositions are determined. The equilibrium composition of elements in austenite, the composition and mass fraction of carbonitride precipitates, as well …
Comparative Assessment Of Downscaling Methods And Application Towards Analysis Of Climate Change Impact On Urban Regions, Markus Eichenbaum
Comparative Assessment Of Downscaling Methods And Application Towards Analysis Of Climate Change Impact On Urban Regions, Markus Eichenbaum
Electronic Thesis and Dissertation Repository
Global climate models (GCM) are sophisticated numerical models used to make long term climate projections. However, the resolution of their output is too coarse for climate change related local impact studies on urban regional scales. Downscaling efforts are taken to address this and increase GCM projection resolution. Physical Scaling (SP) downscaling methodology attempts to incorporate the physical basis of dynamical downscaling efforts with the computational efficiency of statistical methods. In this study, North American Regional Reanalysis surface skin temperature and precipitation data for a 1°x1° region centered on Houston, TX are downscaled to a resolution of 500m via SP and …
Next-Generation Rainfall Idf Curves For The Virginian Drainage Area Of Chesapeake Bay, Xixi Wang, Xiaomin Yang, Zhaoyi Cai
Next-Generation Rainfall Idf Curves For The Virginian Drainage Area Of Chesapeake Bay, Xixi Wang, Xiaomin Yang, Zhaoyi Cai
Civil & Environmental Engineering Faculty Publications
Probability-based intensity-duration-frequency IDF curves are needed but currently lacking for Department of Defense DoD to construct and manage its infrastructure in changing climate. The objectives of this project were to 1 develop an innovative approach for considering rainfall non-stationarity in developing such IDF curves and 2 apply this approach to the state of Virginia. In this regard, the observed data on 15-min rainfall at 57 gauges and the precipitations projected by twelve pairs of Regional Climate Model RCM and Global Circulation Model GCM were used. For a given gauge or watershed, in terms of fitting the empirical exceedance probabilities, a …
Multi-Resolution Spatio-Temporal Change Analyses Of Hydro-Climatological Variables In Association With Large-Scale Oceanic-Atmospheric Climate Signals, Kazi Ali Tamaddun
Multi-Resolution Spatio-Temporal Change Analyses Of Hydro-Climatological Variables In Association With Large-Scale Oceanic-Atmospheric Climate Signals, Kazi Ali Tamaddun
UNLV Theses, Dissertations, Professional Papers, and Capstones
The primary objective of the work presented in this dissertation was to evaluate the change patterns, i.e., a gradual change known as the trend, and an abrupt change known as the shift, of multiple hydro-climatological variables, namely, streamflow, snow water equivalent (SWE), temperature, precipitation, and potential evapotranspiration (PET), in association with the large-scale oceanic-atmospheric climate signals. Moreover, both observed datasets and modeled simulations were used to evaluate such change patterns to assess the efficacy of the modeled datasets in emulating the observed trends and shifts under the influence of uncertainties and inconsistencies. A secondary objective of this study was to …
Utilization Of Remote Sensing Data For Estimation Of The Groundwater Storage Variation, Gaurang Mistry
Utilization Of Remote Sensing Data For Estimation Of The Groundwater Storage Variation, Gaurang Mistry
UNLV Theses, Dissertations, Professional Papers, and Capstones
Groundwater is the most extracted raw material, with an average withdrawal rate of 982 km3 per year, where 70 percent of the total groundwater withdrawn is used for agriculture globally (Margat & van der Gun, 2013). With climate change and increased water demands in recent years, monitoring the changes in the groundwater storage is of the utmost importance. This thesis presents an analysis that determines the rates, trends, and directions where groundwater storage is going in Pakistan. It also correlates fluctuations in groundwater storage with variations in precipitation and agricultural productivity in the country. The overall objectives of this thesis …
Future Changes Of Hydroclimatic Extremes In Western North America Using A Large Ensemble: The Role Of Internal Variability, Mohammad Hasan Mahmoudi
Future Changes Of Hydroclimatic Extremes In Western North America Using A Large Ensemble: The Role Of Internal Variability, Mohammad Hasan Mahmoudi
Electronic Thesis and Dissertation Repository
Increases in the intensity and frequency of extreme events in Western North America (WNA) can cause significant socioeconomic problems and threaten existing infrastructure. In this study we analyze the impacts of climate change on hydroclimatic extremes and assess the role of internal variability over WNA, which collectively drain an area of about 1 million km2. We used gridded observations and downscaled precipitation, maximum and minimum temperature from seven General Circulation Models (GCMs) that participated in the Coupled Model Intercomparison Project Phase 5 (CMIP5) and a large ensemble of CanESM2 model simulations (CanESM2-LE; 50 members) for this analysis. Spatial …
1923 - Flow In California Streams, Bulletin No. 5, Appendix A, Report To The Legislature
1923 - Flow In California Streams, Bulletin No. 5, Appendix A, Report To The Legislature
Miscellaneous Documents and Reports
The legislature of 1921 appropriated $200,000 for an investigation of California's water resources by the State Department of Public Works, Division of Engineering and Irrigation. Accordingly, an engineering investigation was completed and a report on California's water resources transmitted to the legislature on January 1, 1923. The report addresses the geology, precipitation and run-off in California.
2006 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2006 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2005-2006 (WY06), July through September 2006. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.
2010 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2010 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2009-2010 (WY10), July through September 2010. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.
2013 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2013 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2012-2013 (WY13), July through September 2013. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.
2005 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2005 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2004-2005 (WY05), July 2005 through September 2005. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.
2008 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2008 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2007-2008 (WY08), July through September 2008. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.
2009 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2009 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2008-2009 (WY09), July through September 2009. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.
2012 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2012 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2011-2012 (WY12), July through September 2012. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.
2015 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2015 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2014-2015 (WY15), July through September 2015. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.
2003 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2003 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2002-2003 (WY2003), July through September 2003. It provides a brief overview of water conditions in the Salinas Basin with discussion on precipitation, reservoir storage, and ground water trends.
2004 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2004 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2003-2004 (WY2004), July through September 2004. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.
2007 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2007 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2006-2007 (WY07), July through September 2007. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.
2011 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2011 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2010-2011 (WY11), July through September 2011. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.
2014 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2014 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2013-2014 (WY14), July through September 2014. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.
2017 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2017 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2016-2017 (WY17), July through September 2017. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.
2016 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2016 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2015-2016 (WY16), July through September 2016. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.
2018 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
2018 - Salinas Valley Hydrologic Subareas, 4th Quarter Water Conditions
Monterey County Water Resources Agency Water Reports
This report covers the fourth quarter of Water Year 2017-2018 (WY18), July through September 2018. It provides a brief overview of water conditions in the Salinas River Basin with discussion on precipitation, reservoir storage, and ground water trends.