Open Access. Powered by Scholars. Published by Universities.®
Civil and Environmental Engineering Commons™
Open Access. Powered by Scholars. Published by Universities.®
- File Type
Articles 1 - 3 of 3
Full-Text Articles in Civil and Environmental Engineering
Weather Impacts On Traffic Parameters And Signal Timing Performance, Ashrafur Rahman
Weather Impacts On Traffic Parameters And Signal Timing Performance, Ashrafur Rahman
Ashrafur Rahman
This research is a combination of three studies carried out to explore weather impacts on traffic parameters. The first part investigates light rainfall’s impact on uncongested speed during the daytime on a two lane state highway with a detailed statistical analysis and spatially compatible rainfall and speed data. The results show that the speed distribution in light rain conditions is significantly different from the no-rain condition. Light rain causes a drop of 0.9 mph (1.5 km/hr) or 1.8% of speed from the no-rain condition. Variability of speed is not found significantly different between the two conditions. The second part investigates …
Runoff Production In The Upper Rio Chagres Watershed, Panama, Fred Ogden
Runoff Production In The Upper Rio Chagres Watershed, Panama, Fred Ogden
Fred L. Ogden
Runoff production in tropical watersheds is governed by a wide variety of potential sources and there have been few rigorous studies to date. The 414 km2 upper Río Chagres basin offers a unique opportunity to better understand the runoff production mechanisms in tropical watersheds through data analysis and modeling with rainfall and runoff data. Flow data and tipping bucket rain gage data are available at both the basin outlet (Chico gage) and for an 80.6 km2 internal basin location (Piedras gage). Modeling is performed using the Sacramento Soil Moisture Accounting Model (SAC-SMA), calibrated using data from 2000 and verified using …
Comparison Between Analytical Probabilistic And Computer Simulation Models, Using Current Design Examples, Barry A. Palynchuk Phd
Comparison Between Analytical Probabilistic And Computer Simulation Models, Using Current Design Examples, Barry A. Palynchuk Phd
Barry A. Palynchuk PhD
Closed form analytical expressions have been developed to solve several basic problems related to the hydrologic design of storm water management facilities. The collection of these analytical expressions is referred to as the Analytical Probabilistic Storm Water Models (APSWM). APSWM can be used as an alternative to the design storm simulation models in the design and analysis of storm water management facilities. In this paper, a comparison is made between APSWM and design storm simulation models as applied to an actual design case. Conventional outputs such as runoff volume, peak discharge, and peak discharge from detention ponds are reviewed and …