Engineering Commons^™

Spatial And Temporal Analysis Of Precipitation And Effective Rainfall Using Gauge Observations, Satellite, And Gridded Climate Data For Agricultural Water Management In The Upper Colorado River Basin, Mahyar Aboutalebi, Alfonso F. Torres-Rua, L. Niel Allen

Civil and Environmental Engineering Faculty Publications

Accurate spatial and temporal precipitation estimates are important for hydrological studies of irrigation depletion, net irrigation requirement, natural recharge, and hydrological water balances in defined areas. This analysis supports the verification of water savings (reduced depletion)from deficit irrigation of pastures in the Upper Colorado River Basin. The study area has diverse topography with scattered fields and few precipitation gauges that are not representative of the basin.Gridded precipitation products from TRMM-3B42, PRISM, Daymet, and gauge observations were evaluated on two case studies located in Colorado and Wyoming during the 2014–2016 irrigation seasons. First, the resolution at the farm level is discussed. …

Input Uncertainty On Watershed Modeling: Evaluation Of Precipitation And Air Temperature Data By Latent Variables Using Swat, Ruoyu Wang

Ruoyu Wang

Ltpp Data Analysis: Factors Affecting Pavement Roughness For The State Of California, Pedro Zavanga, Alisha Khanal, Mena I. Souliman

Civil Engineering Faculty Publications and Presentations

The contributions of pavement structure and features, rehabilitation techniques, climatic conditions, traffic levels, layer materials and properties, pavement distress, and other factors causing changes in pavement smoothness are not well documented. As a result, it becomes difficult to select the appropriate pavement structure, design features and rehabilitation strategies to ensure pavement smoothness. This study focuses on analysing the available LTPP data for asphalt pavements in California by investigating the correlation between the pavement roughness and the effect of pavement temperature, precipitation, fatigue, age of pavement, rutting, and the average annual daily truck traffic. IRI has been identified as the factor …

Marangoni Flows During Nonsolvent Induced Phase Separation, Douglas R. Tree, Tatsuhiro Iwama, Kris T. Delaney, Joshua Lee, Glenn H. Fredrickson

Faculty Publications

Motivated by the much discussed, yet unexplained, presence of macrovoids in polymer membranes, we explore the impact of Marangoni flows in the process of nonsolvent induced phase separation. Such flows have been hypothesized to be important to the formation of macrovoids, but little quantitative evidence has been produced to date. Using a recently developed multifluid phase field model, we find that roll cells indicative of a solutal Marangoni instability are manifest during solvent/nonsolvent exchange across a stable interface. However, these flows are weak and subsequently do not produce morphological features that might lead to macrovoid formation. By contrast, initial conditions …

1958 - Dwr Bulletin No. 18, San Luis Obispo County Investigation, Volume Ii, Appendixes

State and Federal Documents Relating to Monterey and San Luis Obispo Counties

This 1958 document contains the agreement and supplements between California State Water Resources Board, San Luis Obispo County and the California Department of Public Works; a discussion concerning the geology and groundwater in San Luis Obispo County; as well as records of precipitation, daily runoff and miscellaneous stream flow measurements, depths of groundwater, mineral analyses of surface and groundwater supplies, applications to appropriate water, soil moisture depletion, plans for the protection and development of recreational resources, and alternative plan of development of Nacimiento and San Antonio Rivers.