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...
Influence of a Sand Layer on Headcut Advance
The presence of an erodible material layer in the soil profile has been observed to influence headcut movement in earth emergency spillways. Large-scale flume tests were conducted to examine...
Analysis of Sand Movement on Noto Coast by Geochemical Method
The analysis of sand samples by X - ray fluorescent spectroscopy (abbreviated by XRF) gives the ratio of the geochemical elements to construct the sand samples. This shows the geochemical...
Toe Scour Protection Methods
Toe scour protection is an important element in bank protection projects because undermining by scour at the toe is one of the major causes of failure of bank protection. Existing toe...
Sandbar Formation in Side-Diversion Channels
Prediction of sandbar formation in side-diversion channels is desirable in a wide range of river engineering problems. However, the mechanism by which they form is still not well understood...
New Methods to Characterize Site Amplification
Methods alternative to spectral ratios are introduced to characterize site amplification. The methods are developed by using a range of models, from the simple constant amplification model...
Hanford Waste Vitrification Project Overview and Status
The Hanford Waste Vitrification Project (HWVP) is being constructed at the U.S. Department of Energy's Hanford Site in Richland, Washington. The paper gives an overview of the HWVP which...
Optimal State Feedback Estimation in Groundwater: Application to Leaky Aquifers
The problem of groundwater flow in leaky aquifer is looked at from a stochastic point of view. Optimal estimation of hydraulic heads are achieved using Kalman filtering. The Kalman filtering...
Algorithm for Crack Detection in Automated Pavement Analysis
This paper summarizes recent research in various algorithms for detection of pavement cracks. The most successful algorithms use a digital filter to obtain an approximation of the principal...
Coastal Erosion and Protection in China
The recent coastal erosion in China was becoming increasingly remarkable in the late fifties and had taken a turn for the worse in the late seventies. At present there exist about 70 per...
Geological Characterization of Selected Offshore Sand Resources on the OCS, Offshore Alabama, for Beach Nourishment
Most Alabama Gulf and estuarine shoreline is undergoing long-term erosion; threatened shorelines will need programs of replenishment and maintenance if they are to be even temporarily...
Five Year Program to Evaluate Sand, Mineral and Hard Bottom Resources of the Continental Shelf off South Carolina
In July of 1992, the State of South Carolina entered into a cooperative arrangement with the Minerals Management Service (MMS) to establish a technical working group to identify and evaluate...
Sand Management Planning in Oregon
Under Statewide Planning Goal 18 dune grading or sand movement necessary to maintain views or prevent sand inundation is allowed only as part of an area-wide foredune management plan....
Laboratory Testing of an Artificial Reef Erosion Control Device
A physical model study has been conducted to examine the effectiveness of a concrete artificial reef in limiting offshore, storm-induced sand loss from a nourished beach. The experiment...
Mississippi-Alabama: Natural and Man-Made Shores?A Study in Contrasts
Quaternary formations essentially define the present configuration of the Alabama-Mississippi coast. As the result of the coast's tectonic history, they are much less widespread and thinner...
DUNECARE: Healing the Coast
DUNECARE is active community participation in environmental restoration. This document reports on the operation of the DUNECARE programme in coastal New South Wales, Australia. A Model...
Coastal Erosion Analysis of the Belle Fontaine Area, Jackson County, Mississippi
The Belle Fontaine area contains the only remaining natural beach on the mainland Mississippi shoreline. The fine to medium-grained sand beach is the result of erosion and retreat of the...
The Profile Volume Approach to Beach Nourishment
The purpose of this paper is to outline a design approach to beach nourishment that emphasizes profile volumes. The advantages and disadvantages of the method are discussed and related...
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