Browsing Department of Civil Engineering by Title
Now showing items 358-377 of 631
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IDENTIFICATION OF THE MANAGEABLE CONSTRUCTION REWORK INDICATORS AND RELATED SUCCESSFUL STRATEGIES
(2019-05-08)In construction projects whether small or large scale, in the design and construction phases, contractors and owners face numerous reworks which finally leads to schedule delays and cost overruns. Although studying the ... -
Identifying Issues Impacting Productivity Of Box Jacking Projects
(Civil & Environmental Engineering, 2013-03-20)Jacking is a trenchless construction technique used for installing underground pipeline system. Jacking method is more widely used for upgrading under capacity culverts and drainage structures under roads and railroad ... -
Identifying the Optimal Combination of Critical Roadside Slope Segments Susceptible to Rainfall-induced Failures for Minimizing Vulnerability of Highway Networks
(2022-08-11)The stability of roadside slopes is vital for the smooth operation of the highway transportation system. The failure of slopes adjacent to the highway corridors adversely impacts the network users and network operators. ... -
Impact Of A Pre-combustion Retrofit Device On Vehicular Emissions: A Case Study
(Civil & Environmental Engineering, 2007-08-23)Vehicular emissions are a major cause of air pollution in the cities worldwide. Increased numbers of vehicles and the vehicle miles traveled by them every year means that the emissions are going to have a detrimental effect ... -
Impact Of Lateral Swell Pressure On Retaining Structure Design Using Expansive Cohesive Backfill
(Civil & Environmental Engineering, 2008-08-08)Since cohesive soils are difficult to drain once becoming saturated, in order to reduce lateral earth pressures exerted by saturated cohesive soils on retaining structures, retaining wall designs most always specify use ... -
The Impact Of Lime Dosage On Odor Reduction Of Biosolids
(Civil & Environmental Engineering, 2014-12)The amount of boisolids production is increasing due to developing cities and the mitigation of biosolids odorants is a key role to have a successful biosolids land application program. The objective of this study is to ... -
Impact Of Transit-oriented Infrastructure Investments on Property Valuations
(Civil & Environmental Engineering, 2012-04-11)The population explosion of the second half of the last century brought about increased human activity. Much of the attendant increased access to activities has been facilitated by the incredible technological advances in ... -
IMPACT OF WEATHER FACTORS ON GO-AROUND OCCURRENCE
(2016-05-10)A “go-around” occurs when an aircraft, which is on final approach, aborts it landing due to unsatisfactory conditions. Go-arounds have a significant impact on the capacity of the airports and pose a serious concern at large ... -
IMPACT OF WET-DRY CYCLE ON MECHANICAL PROPERTIES OF EXPANSIVE CLAY UNDER LOW OVERBURDEN STRESS
(2016-09-16)The seasonal variation in the water content termed as drying-wetting cycle is one of the most important environmental factor that may cause the degradation of strength for expansive clay. Highway embankment within the north ... -
IMPACTS OF CONSTRUCTION MATERIAL DELAY IN IRAQ
(2020-01-06)The construction industry is considered one of the most important industries in Iraq. It is well known that most construction projects in this country can experience missed deadlines and cost overruns or both. The main ... -
IMPACTS OF GEOTECHNICAL ASPECTS IN TUNNELING DESIGN AND CONSTRUCTION
(2018-05-07)In tunneling project, different type of methods is conducted to do the project. Knowing geotechnical aspects of tunnel project is unavoidable and crucial in early stage of project especially before contract to have efficient ... -
Impacts Of Signal Synchronization On Vehicular Emissions - An On-board Measurement Case Study
(Civil & Environmental Engineering, 2007-08-23)Nearly 56% of total nitrogen oxide (NOx) emissions are produced by mobile sources. Transportation and air quality managers at the state and regional level have the responsibility of developing and evaluating Transportation ... -
An Improved Model For Predicting Methane Emissions From Landfills Based On Rainfall, Ambient Temperature And Waste Composition
(Civil & Environmental Engineering, 2013-03-20)Accurately estimating the emissions of methane (CH4) and carbon dioxide (CO2) in a landfill is important for quantifying its greenhouse gas (GHG) emissions and power generation potential. Previous studies have shown that ... -
IMPROVEMENTS TO THE DUPLICATE SHEAR TESTER
(2018-02-15)Rutting in the asphalt concrete layer is a major distress in flexible pavements caused by the permanent shear deformation in asphalt mixes. The shear deformation is induced by heavy truck axis during hot summer days. Rutting ... -
Improving Analysis Of Heavy To Extreme Precipitation Using Conditional Bias-penalized Optimal Estimation
(Civil & Environmental Engineering, 2014-03-10)Precipitation estimation is a very important topic from the societal perspective as heavy precipitation can cause flooding from which loss of lives and damage to properties can occur. In current practice, a number of spatial ... -
IMPROVING FLOOD FORECASTING USING CONDITIONAL BIAS-AWARE ASSIMILATION OF STREAMFLOW OBSERVATIONS AND DYNAMIC ASSESSMENT OF FLOW-DEPENDENT INFORMATION CONTENT
(2020-12-22)Accurate forecasting of floods is a long-standing challenge in hydrology and water management. Data assimilation (DA) is a popular technique used to improve forecast accuracy by updating the model states in real time using ... -
IMPROVING HYDROLOGIC PREDICTION FOR LARGE URBAN AREAS THROUGH STOCHASTIC ANALYSIS OF SCALE-DEPENDENT RUNOFF RESPONSE, ADVANCED SENSING AND HIGH-RESOLUTION MODELING
(2016-05-18)Due to urbanization and climate change, large urban areas such as the DallasFort Worth Metroplex (DFW) area is vulnerable not only to river flooding but also flash flooding. Due to the nonstationarities involved, projecting ... -
IMPROVING MULTI-RESERVOIR WATER SUPPLY SYSTEM OPERATION USING ENSEMBLE FORECASTING AND GLOBAL SENSITIVITY ANALYSIS
(2019-05-16)The objective of this research is to improve the cost-effectiveness, reliability and resilience of water supply system operation through the utilization of ensemble forecasting and optimization of the operating policies. ... -
IMPROVING OPERATIONAL HYDROLOGIC FORECASTING VIA CONDITIONAL BIAS-PENALIZED MULTI-SENSOR PRECIPITATION ESTIMATION AND MULTI-MODEL STREAMFLOW PREDICTION
(2021-05-09)Many multivariate analysis techniques involve minimizing mean square error (MSE) or error variance under unbiasedness. In the presence of observation error, variance minimization tends to introduce negative and positive ... -
Improving Post Processing of Ensemble Streamflow Forecast for Short-to-long Ranges: A Multiscale Approach
(2019-08-30)A novel multi-scale post-processor for ensemble streamflow prediction, MS-EnsPost, and a multiscale probability matching (MS-PM) technique for bias correction in streamflow simulation are developed and evaluated. The MS-PM ...