Design Storms for Urban Drainage
The characteristics of design storms for urban drainage are reviewed. There are indications that, under certain conditions, design storms produce runoff simulation results which are equivalent...
On-Site Microcomputer Control of a Combined Sewer Overflow Diversion Structure
This paper describes the design of an inexpensive system for controlling combined sewer overflows using on-site equipment (raingauges, flow gauges, automatic gates, and microcomputers)....
The United Kingdom Approach to Rehabilitation
Following concern over the condition and performance of its underground assets, the UK Water Industry has developed strategies for cost effective sewer and water main rehabilitation. These...
Intense Storms and the Runoff Coefficient
During prolonged, intense storms the runoff coefficient increases in value and approaches one irrespective of the vegetation and soil characteristics of the watershed. As the runoff coefficient...
Unique Flood and Drainage Problems in Los Angeles
Storm drainage for the coastal cities has to traverse highly used sandy recreational beaches. Due to new requirements on the construction of storm drains to the ocean, a beach outlet has...
Orleans Parish Drainage Improvements
A case study of the development of an urban drainage master plan for Orleans Parish, Louisiana is presented. The Parish, which occupies an area of approximately 98,000 acres, lies entirely...
Alternate Sewers�No Longer Alternate
The term alternate sewers means those used where neither conventional gravity sanitary sewers will suffice, nor will the septic tank/leach field system. In such situations, usually one...
Optimal Design of Sanitary Sewers
Virtually all recent research has been on conventional gravity sewers without pumping. A variety of optimization techniques has been used, including linear programming, nonlinear programming,...
Physical and Chemical Data Needs for Design
The problems and deficiencies in the existing characterisation and evaluation of urban stormwater runoff quality are examined through discussion of adopted and proposed design criteria...
Cleaning the Nut Island Outfalls
As an early component of a comprehensive program to reduce pollution in Boston Harbor, two 80-year-old cast-iron outfalls, each 60 inches in diameter and a mile long were cleaned in a...
Inventorying the System/Inspection Introductory Remarks
A major sewer system evaluation survey is nearing completion in the seven communities which make up Special District No. 1 of the East Bay Municipal Utility District. A major effort has...
The National Infrastructure Act
Today, more than ever before, the United States faces a serious problem related to the condition and adequacy of its basic infrastructure - surface transportation, water supply and distribution,...
Real Time Control of Combined Sewers
After an introduction on the scope of urban drainage and water pollution control problems static solution approaches are shortly described and their disadvantages are lined out. The potential...
Integrated Knowledge-Based Software for Flood and Water Pollution Management
The authors' aim is to develop a comprehensive city-wide system to control both flooding and pollution. This system provides information on the sewer system with regard to:...
Storm Sewer Computer-Aided Design and Uncertainty
A micro-computer based storm drainage model is presented which facilitates urban storm sewer design on fast tracked construction projects. The model is an interactive Basic program using...
The WSSC Integrated System Implementation Project
The software development effort conducted for the Washington Suburban Sanitary Commission began in October, 1981 and has been in process since that date. The goal of the effort is to produce...
Hydrograph Decomposition: Using a Technical Database
Trouble shooting for infiltration/inflow (I/I) problems in a sewer system is made much easier with the aid of a computerized hydrograph decomposition methodology. A methodology has been...
Eliminating Pollution From Combined Sewer Overflows With Inlet Controls
The problem of contamination of surface waters with storm and sanitary discharges from combined sewer systems has been one of the most difficult problems confronting environmental engineers,...
Elimination of Tidal Inflow?Bridgeport, CT
Using a program of sewer gauging, chloride sampling, sewer system analysis and treatment plant record review, it was determined that Bridgeport's old tide gates allowed 19...
Quali-Continuous Simulation of CSOs
Providence, Rhode Island, has a combined sewer system. During and following a precipitation event the capacity of the system may be exceeded and a mixture of wastewater and urban runoff...
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