Water distribution systems in hilly areas are always divided into several zones due to the undulating terrain. The present approach of dividing water distribution systems lacks an assessment index and is characterized by a low degree of automation. With the building of a mathematical model, this paper introduces two indicators – pressure limitation and pressure variation – to enable the automatic division of the water supply pipe network. It prioritizes economic index as the objective function in the evaluation of the division of water distribution systems in hilly areas, and then selects the optimal division scheme by generic algorithm in a large number of candidates. The SY terrain in YW City China is used for verification. Compared to traditional water supply partition methods, this procedure is easier to operate time-savingly by staff and is more automatic.
Wallingford Software’s asset and database management solution, InfoNet, has multiple uses within a water company. This new series of articles examines practical uses for InfoNet within a utility, highlighting the processes that can be optimized.
One key use for InfoNet within water distribution companies is as a tool to assist in planning mains rehabilitation work. As the utility can determine which properties or customers are affected by repair work to an individual pipe, whether planned or emergency works, it...
Untitled Document
The problem
Do you know the validity of the data in your various databases?
Do you know how accurate it is?
Do you know how much data is missing?
Have you ever checked it?
All of it?
When we talk to our clients about InfoNet and the benefits it brings to the storage and retrieval of their asset data, we sometimes have the opportunity to run some of their data through InfoNet's validation processes, for both their collection system assets and their water distributio...
The water industry is not short of software offerings, and so the arguments in favour of yet another software program had better be very good indeed. In this article we examine how one very significant community of users – operations managers, engineers and planners - have largely had their specific needs overlooked; we identify the type of system needed to fulfil their requirements and the operational and commercial benefits that might flow from its use.
There are currently four types of software in widespread...
Overview
In the UK, numerical Hydraulic Modelling of the urban environment, water networks and rivers plays a vital role in providing the UK Water Industry with solutions for protecting the environment, meeting UK Government and European Regulations, meeting OPEX and CAPEX business targets, and improving the efficiency of Water Companies in managing their assets.
Similarly, the UK water industry has invested heavily in GIS and asset databases. But until recently these have been under utilised by the modelling...
Introduction
Danfoss is a global manufacturer of hermetic compressors, pumps, valves, motors and other electrical control units. The company owns a major manufacturing facility located on a small island, Als, in the Baltic Sea. In 1983 the company was routinely withdrawing two million cubic meters of fresh water from the sole aquifer which supplies the entire island, home to 50,000 residents. This was well within the limit of three million cubic meters authorized by local officials.
In 1983, Danfoss discovered...
A wave of privatization is rolling through the water industry – at the environment‘s expense? In order to provide an answer to this question, the Environmental-Rating agency oekom research AG, Munich, put a number of water supply companies and manufacturers of water appliances to the environmental test. In results published today, oekom identifies the British water supplier Severn Trent as the environmental leader of the water supply group with a B grade in the overall Environmental-Rating. The Austrian water...
The Halifax Regional Municipality (HRM) in Nova Scotia took a giant leap in 1998 to reaching a 50 percent diversion goal by 2000. Between July and November, 1998, organics collection carts were distributed to almost 100,000 households in the region. In December, two new composting facilities designed to process those materials, as well as feedstocks from the commercial sector, opened their doors.
“The Halifax Regional Municipality’s new integrated solid waste-resource management system is ‘leading edge’ in all...
Background
The Printing Office (TPO) is a medium sized print shop employing 15 staff. It specialises in the production of high quality, short run jobs.
In the printing industry, the use of solvents has always been a problem. Whether it is from the point of view of workplace health and safety or from environmental concern, any reduction in the use of solvents is a welcome change. Motivated by these issues, TPO decided to trial a new dampener roller washer system that uses no solvents.
Issue
The offset...
BASF Australia is saving $120,000 per year after installing a $40,000 pump that enabled them to recover valuable acrylic latex previously flushed to effluent when equipment was washed. They are also saving on water costs and thinking about cleaner production led the company to improved scheduling which boosted productivity.
Background
Based in Victoria, BASF Australia manufactures a range of acrylic latex products. These are packaged into different sized containers for transport and sale.
The process
Until...
On 12th March 1997, the European Commission adopted a proposal from the Environment Commissioner Ritt Bjerregaard on a European Union strategy to combat acidification. The strategy will, by 2010, reduce significantly the extent of the areas in the European Union where the tolerance of sensitive ecosystems to acidity is exceeded. Main elements of the strategy include establishment of national emission ceilings for each acid rain pollutant; ratification of the UN protocol on further reductions of sulphur emissions;...
Measuring and valuing the health impacts of pollution are very complex and available methods of economic analysis are often rudimentary. In recent years, considerable progress has been made, especially in respect to air pollution. This note summarizes the latest findings and outlines some basic approaches that can be applied in the economic analysis of Bank projects and sector studies. However, a degree of uncertainty still remains, and great care must be taken in their application.
Background
Investments in...
Introduction
Today`s high technology water purification systems are designed to remove many types of impurities. One of the most difficult to deal with is microbiological contamination. Microbial growth in a water system presents two problems: it not only reduces water quality, but if left unattended, the problem can `grow` to reduce system performance and life. Biofouling can cause a decrease in product water flow rate, a decrease in driving pressure, and can contribute to corrosion of piping and housings. This...
`The definition and selection of environmental performance indicators is still at an early stage but the use of indicators is increasing, both for the tracking of trends in pollution and other environmental issues at a large scale (national or regional) and also for the monitoring of Bank projects. This note provides a framework to assist in the selection of appropriate indicators for pollution projects, and discusses the issues that must be considered. It provides examples of some commonly used indicators of air...
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