Many cities and districts worldwide approaches a situation with increasing deficit of water needed for urban consumption (households, industry). Expensive projects are planned to bring water supply over long distances or create costly treatment processes. At the same time water losses from distribution network can be up to 50%. Still the reduction of leakage is often not straight-forward, and ageing systems with increasing failure rate increase the stress on the network. The challenges for urban water distribution have a huge financial dimension. Although they do what they can, many cities and countries do not have the economic capability cope with their problems. They are therefore chasing international funds such as EU structural funds, World Bank etc. This situation is a challenge regarding the fulfilment of the UN Millennium goals for water. Also in the highest developed countries in financial terms the network ageing is considered as a major challenge into 21 century, and sustainable levels of renovation and corresponding decision criteria is under discussion. Also in these countries the willingness to invest in networks is probably less than the actual need. A minimum ambition should be not to expel the financial burden of water network management to our children and grandchildren generations, and it is the responsibility of researchers to demonstrate consequences of to-days practises. The contribution of research community can be very important to cope with the problems, by demonstrating the best ways to approach the situation, new technologies and optimization techniques. These approaches can optimise the necessary expenditure of resources to improve the urban water situation for the less favorized regions. This is the background for the extensive joint efforts that has been carried out by 16 research centres and 20 cities Europe-wide and also including Australia, namely the CARE-W project. Intermediate results have been presented in several international conferences, including the IWA World Congresses in Paris, Hamburg, Melbourne and Marrakech. CARE-W is now finished as EU research projects, but it continues with application and implementation world-wide. The main goals for CARE-W have been to support cities in achieving the right urban water rehabilitation project using the right technology at the right time. The research team had as its vision to support a move from re-active approach to the networks to a pro-active approach. This means leaving the strategy of repairing damages to avoid the damages by preventive rehabilitation, in other words to move from crisis handling to risk based network management. Avoiding damages means saving money. On the other side and there will be a risk of wrong selection of projects and waste of investment capital. To avoid this, better knowledge about the network performance is needed. This can be obtained by a systematic analysis of the relevant factors of network performance based on a systematic collection and processing of urban network information. The information may need to be more extensive than practise in cities, but the main idea is to make the data collection and processing more intelligent. The network manager of CARE-W acts as the operating system and connect tools to GIS platform and databases. It is also managing the data flow (input and results) between the tools. The tools of the system are summarized as follows: Objective 1: Status, trends, investments, customer related performance: PI tool on investment and condition for drinking water systems; Objective 2: Failure forecasting: Tool based on failure history (breaks, leaks) analyzed by stochastic method (Proportional Hazard model); Objective 3: Hydraulic performance: Hydraulic network and hydraulic reliability model (consequences when pipe stop working); Objective 4: Socio-economic impact (impact to customer) : Integrated in ranking methodology; Objective 5:Long-term investment strategies: Based on lif...
S. Saegrov, V. Di Federico (2004). CARE_W : Computer Aided Rehabilitation of Water Networks, EU Fifth Framework Program, (contratto EVK1-CT-2000-00053), 2001-2004.
CARE_W : Computer Aided Rehabilitation of Water Networks, EU Fifth Framework Program, (contratto EVK1-CT-2000-00053), 2001-2004
DI FEDERICO, VITTORIO
2004
Abstract
Many cities and districts worldwide approaches a situation with increasing deficit of water needed for urban consumption (households, industry). Expensive projects are planned to bring water supply over long distances or create costly treatment processes. At the same time water losses from distribution network can be up to 50%. Still the reduction of leakage is often not straight-forward, and ageing systems with increasing failure rate increase the stress on the network. The challenges for urban water distribution have a huge financial dimension. Although they do what they can, many cities and countries do not have the economic capability cope with their problems. They are therefore chasing international funds such as EU structural funds, World Bank etc. This situation is a challenge regarding the fulfilment of the UN Millennium goals for water. Also in the highest developed countries in financial terms the network ageing is considered as a major challenge into 21 century, and sustainable levels of renovation and corresponding decision criteria is under discussion. Also in these countries the willingness to invest in networks is probably less than the actual need. A minimum ambition should be not to expel the financial burden of water network management to our children and grandchildren generations, and it is the responsibility of researchers to demonstrate consequences of to-days practises. The contribution of research community can be very important to cope with the problems, by demonstrating the best ways to approach the situation, new technologies and optimization techniques. These approaches can optimise the necessary expenditure of resources to improve the urban water situation for the less favorized regions. This is the background for the extensive joint efforts that has been carried out by 16 research centres and 20 cities Europe-wide and also including Australia, namely the CARE-W project. Intermediate results have been presented in several international conferences, including the IWA World Congresses in Paris, Hamburg, Melbourne and Marrakech. CARE-W is now finished as EU research projects, but it continues with application and implementation world-wide. The main goals for CARE-W have been to support cities in achieving the right urban water rehabilitation project using the right technology at the right time. The research team had as its vision to support a move from re-active approach to the networks to a pro-active approach. This means leaving the strategy of repairing damages to avoid the damages by preventive rehabilitation, in other words to move from crisis handling to risk based network management. Avoiding damages means saving money. On the other side and there will be a risk of wrong selection of projects and waste of investment capital. To avoid this, better knowledge about the network performance is needed. This can be obtained by a systematic analysis of the relevant factors of network performance based on a systematic collection and processing of urban network information. The information may need to be more extensive than practise in cities, but the main idea is to make the data collection and processing more intelligent. The network manager of CARE-W acts as the operating system and connect tools to GIS platform and databases. It is also managing the data flow (input and results) between the tools. The tools of the system are summarized as follows: Objective 1: Status, trends, investments, customer related performance: PI tool on investment and condition for drinking water systems; Objective 2: Failure forecasting: Tool based on failure history (breaks, leaks) analyzed by stochastic method (Proportional Hazard model); Objective 3: Hydraulic performance: Hydraulic network and hydraulic reliability model (consequences when pipe stop working); Objective 4: Socio-economic impact (impact to customer) : Integrated in ranking methodology; Objective 5:Long-term investment strategies: Based on lif...I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
