Towering Views
A proposed observation tower for New York City�s Central Park would comprise the world�s tallest temporary wooden structure and include a wind-powered system to filter water from the reservoir it would...
Evaluation of a Bias Aware Ensemble Kalman Filter Using a Scaled Aquifer Transport Experiment
In this study, a bias-aware Ensemble Kalman Filter (EnKF) is applied to a scaled aquifer transport experiment (1-cm of the model equals 1-m at field scale and 1-day of model transport...
Redesigning the San Roque Dam
Engineers updated a 20-year-old design for the San Roque Dam in the Philippines to save time and money and improve the dam's ability to withstand earthquakes. The structure...
Clearing the Air, Biologically
Using biofilters to reduce air pollution emitted from publicly owned treatment works is becoming more popular as owners realize how effective the systems are. The process cleans the air...
The Membrane Treatment
Innovations in the design and use of pressure-driven membranes can help municipalities reach stringent drinking water quality standards. Although membrane processes have been used successfully...
Filtration and Drainage in Geotechnical/Geoenvironmental Engineering
This proceedings,
Sludge's Re-Treat
The Shreveport, La., water treatment plant was losing up to 25% of the water it pumped into filter backwashing and sludge. Demopulos & Ferguson Associates (DFA), Shreveport, designed...
Permanent Runoff Controls
The Center for Research in Water Resources at the University of Texas, Austin, Texas, conducted tests showing that grassy swales can remove pollutants from highway runoff. Many pollutants...
Hydraulic and Engineering Considerations in Designing Constructed Treatment Wetlands for a Lake Restoration
A 12,600 ha (31,000 acre) hypereutrophic lake in central Florida is being restored by constructing a 2,020 ha (5,000 acre) wetland filter to remove suspended sediments and particulate...
Comparison of Methods for Sizing Secondary Treatment Filters for Wastewater
The trickling filter process in which a bacterial biomass is allowed to grow attached to a filter medium of rock or plastic is effectively used for removal of organic materials in domestic...
Anaheim State-of-the-Art Water Treatment Plant?Six Years from Conception to Completion
After six years of intensive planning, budgeting, pilot testing, design, and construction, the City of Anaheim, California, has successfully completed the modifications to the 15 mgd Lenain...
Recreational Impoundments Retrofit of Existing and Design of New Facilities
Water has been a critical component of most human endeavors, and its value as a recreational amenity is well-known. An increasing number of recreational impoundments are being considered...
Designing for the First Flush
This article explains some of the details involved in separating the first flush of a storm event from the remainder of the storm. It also explains how to provide primary treatment of...
Modal Filter Based Structural Control of a Highway Bridge
An Adaptive Modal Filter (AMF) algorithm is developed which uncouples complicated multi-mode structural dynamic response into simple single-mode response. The application to active structural...
Linking Hydrodynamic and Biogeochemical Transport Models for Estuarine and Coastal Waters
Methodologies for linking estuarine and coastal hydrodynamic and biogeochemical transport models are reviewed and evaluated. The central premise of the review and evaluation is that intratidal...
Cryptosporidium and the Milwaukee Incident
In early 1993, Milwaukee, Wisconsin reported a sharp increase in the number of diarrhea patients and shortage of over the counter drugs for diarrhea control at local pharmacies. This increase...
Assessing Roughing Filtration Design Variables
Rural communities are affected by the surface water treatment rule and are looking for inexpensive filtration options which are easy to operate and maintain. This paper evaluates roughing...
Filtration and Backwashing Performance of Biologically-Active Filters
Before widespread use can be made of biological filters, it is crucial to develop an understanding of the filtration and backwashing performance of these filters. Experimental results...
Nitrification in Single-Stage Trickling Filters
An assessment of nitrification of municipal wastewater in trickling filters was performed using operating data from wastewater treatment facilities currently in operation. A survey of...
Real-Time Flood Forecasting Using Adaptive Estimation
The proposed flood forecasting system combines a flood routing model with a parameter estimation model. The flood routing model utilizes ?-index to determine the effective rainfall and...
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