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Articles 1 - 10 of 10
Full-Text Articles in Engineering
An Investigation Into The Water Budget And The Management Of The Snake River System, John Whitney Hildreth
An Investigation Into The Water Budget And The Management Of The Snake River System, John Whitney Hildreth
Boise State University Theses and Dissertations
Future climate change poses a major conceptual challenge to the availability of water resources due to the uncertainty involved with changes to the hydrologic cycle. Over the past decades, observed warming temperatures across the Western United Sates have shown significant impacts on river basin scale hydrology. This research uses physically based modeling tools to assess the hydrologic impacts of climate change in the Snake River Basin. Physically based hydrologic modeling studies of future climate do not typically take into account interactions between groundwater and surface water. To account for these interactions, the Variable Infiltration Capacity model is coupled with the …
Field Procedure For Estimating The Measurement Area Of Non-Contact Temperature Sensors, M. Khanal, R. Davidson
Field Procedure For Estimating The Measurement Area Of Non-Contact Temperature Sensors, M. Khanal, R. Davidson
Civil Engineering Faculty Publications and Presentations
Transportation departments across the United States have installed sensors mounted on towers by the roadside to measure road surface temperatures. Since no guidelines exist for verifying the accuracy of such measurements, agencies are forced to accept claims made by vendors. To correct this situation, the Idaho Transportation Department (ITD) contracted with Boise State University (BSU) to test the accuracy of the non-contact, infrared temperature sensors installed throughout Idaho. Before collecting independent temperature data, BSU devised an easy-to-use procedure for determining the effective area viewed by the infrared sensors. According to ITD, the vendor claimed that at a distance of 10 …
Swell And Shrinkage Characterizations Of Unsaturated Expansive Clays From Texas, Anand J. Puppala, Thammanoon Manosuthikij, Bhaskar C. S. Chittoori
Swell And Shrinkage Characterizations Of Unsaturated Expansive Clays From Texas, Anand J. Puppala, Thammanoon Manosuthikij, Bhaskar C. S. Chittoori
Civil Engineering Faculty Publications and Presentations
Expansive soils have long been recognized as problematic because they cause failure to civil structures constructed above them. The main problem of these soils can be attributed to poor understanding of the volume changes caused by moisture fluctuations. Current swell and shrinkage characterization models are limited by both the lack of standardized tests and tests that employ volume changes in uniaxial direction. In the present research, a comprehensive laboratory investigation was undertaken to study the volume change related swell–shrinkage behaviors of five different types of expansive clayey soils sampled from various regions in Texas, USA. Extensive experimental programs consisting of …
Electromagnetic Stimulation Of Transport In Water For Geoenvironmental Applications, A. Farid, M. Azad, J. Browning, Elisa H. Barney Smith
Electromagnetic Stimulation Of Transport In Water For Geoenvironmental Applications, A. Farid, M. Azad, J. Browning, Elisa H. Barney Smith
Civil Engineering Faculty Publications and Presentations
Air sparging is a popular soil remediation technique that enables the removal of contaminants by diffusing air into saturated zones of soil. The removal process is, however, slow. The goal of this work is to study the effect of electromagnetic (EM) waves - with minimal heat generation - on transport mechanisms such as diffusion, in order to improve airflow or contaminant transport and expedite the cleanup process using air sparging or similar technologies. This effect is studied through an experimental setup that examines the diffusion of a nonreactive dye in water under EM waves at a range of frequencies between …
Consequences Of Electromagnetic Stimulation On Hydraulic Conductivity Of Soils, A. Farid, S. Azad, J. Browning, Elisa H. Barney Smith
Consequences Of Electromagnetic Stimulation On Hydraulic Conductivity Of Soils, A. Farid, S. Azad, J. Browning, Elisa H. Barney Smith
Civil Engineering Faculty Publications and Presentations
Hydraulic conductivity is a measure of the rate at which water flows through porous media. Because of the dipole properties of water molecules, any electric field can affect hydraulic conductivity. In this study, the effect of radio-frequency (RF) waves on hydraulic conductivity is investigated. This is important both for the geophysical measurement of hydraulic conductivity as well as remediation using electromagnetic waves. Bentonite clay and sandy samples are tested in rigid-wall, cylindrical permeameters and stimulated using a CPVC-cased monopole antenna vertically centered in the permeameters. The permeameters are encased within RF cavities constructed of aluminum mesh in order to prevent …
A New Framework For Flooding Control In Regulated River Systems, Elizabeth Akemi Kanashiro
A New Framework For Flooding Control In Regulated River Systems, Elizabeth Akemi Kanashiro
Boise State University Theses and Dissertations
This thesis presents a case study on the application of a dynamic framework for the intelligent control of flooding in the Boise River system in Idaho. This framework couples a robust and numerically efficient hydraulic routing approach with the popular multi-objective, non-dominated Sorting Genetic Algorithm II (NSGA-II). The novelty of this framework is that it allows for controlled flooding when the conveyance capacity of the river system is exceeded or is about to exceed. Controlled flooding is based on weight factors assigned to each reach of the system depending on the amount of damage that would occur should a flood …
Assessment Of Surface Energy Balance In Southern Idaho, Beda Luitel
Assessment Of Surface Energy Balance In Southern Idaho, Beda Luitel
McNair Scholars Research Journal
Proper management of water resources is always a matter of concern in arid regions like southern Idaho such as the Snake River basin where rainfall is limited and the moisture level of atmospheric air is below threshold level most of the time throughout a year. For the proper assessment of water resources it is necessary to quantify the Evapotranspiration (ET) loss in this region and use the available water resources efficiently. A vast quantity of water is moving in the atmosphere under the direct influence of solar energy. So, in order to characterize the behavior of the water cycle, it …
Explaining The Hydroclimatic Variability And Change In The Salmon River Basin, Venkataramana Sridhar, Xin Jin, W. Thilini Jaksa
Explaining The Hydroclimatic Variability And Change In The Salmon River Basin, Venkataramana Sridhar, Xin Jin, W. Thilini Jaksa
Civil Engineering Faculty Publications and Presentations
Climate change in the Pacific Northwest and in particular, the Salmon River Basin (SRB), is expected to bring about 3–5 °C rise in temperatures and an 8 % increase in precipitation. In order to assess the impacts due to these changes at the basin scale, this study employed an improved version of Variable Infiltration Capacity (VIC) model, which includes a parallel version of VIC combined with a comprehensive parameter estimation technique, Shuffled Complex Evolution (SCE) to estimate the streamflow and other water balance components. Our calibration (1955–1975) and validation (1976–1999) of the model at the outlet of the basin, White …
Groundwater Levels In Northern Texas High Plains: Baseline For Existing Agricultural Management Practices, Jairo E. Hernández, Prasanna H. Gowda, Thomas H. Marek, Terry A. Howell, Wonsook Ha
Groundwater Levels In Northern Texas High Plains: Baseline For Existing Agricultural Management Practices, Jairo E. Hernández, Prasanna H. Gowda, Thomas H. Marek, Terry A. Howell, Wonsook Ha
Civil Engineering Faculty Publications and Presentations
New groundwater policies are being debated for the Northern Texas High Plains because of Ogallala Aquifer depletion. These policies should be evaluated using a calibrated groundwater model for assessing their impact on subsequent groundwater levels. The objective of this study was to calibrate and validate a regional groundwater model for predicting the impact of existing agricultural management practices on groundwater levels beneath 4 counties located in the Northern Texas High Plains. Results indicated that the MODFLOW-2000 groundwater model was calibrated and validated satisfactorily based on reproducing and comparing groundwater levels with coefficients of determination of 0.97 and 0.98, root mean …
Evaluation Of The Complementary Relationship Using Noah Land Surface Model And North American Regional Reanalysis (Narr) Data To Estimate Evapotranspiration In Semiarid Ecosystems, W. Thilini Jaksa, Venkataramana Sridhar, Justin L. Huntington, Mandar Khanal
Evaluation Of The Complementary Relationship Using Noah Land Surface Model And North American Regional Reanalysis (Narr) Data To Estimate Evapotranspiration In Semiarid Ecosystems, W. Thilini Jaksa, Venkataramana Sridhar, Justin L. Huntington, Mandar Khanal
Civil Engineering Faculty Publications and Presentations
Estimating evapotranspiration using the complementary relationship can serve as a proxy to more sophisticated physically based approaches and can be used to better understand water and energy budget feedbacks. The authors investigated the existence of complementarity between actual evapotranspiration (ET) and potential ET (ETp) over natural vegetation in semiarid desert ecosystems of southern Idaho using only the forcing data and simulated fluxes obtained from Noah land surface model (LSM) and North American Regional Reanalysis (NARR) data. To mitigate the paucity of long-term meteorological data, the Noah LSM-simulated fluxes and the NARR forcing data were used in the advection–aridity …