Programme Poster session 4
A DMA DESIGN FOR “NAPOLI EST” WATER DISTRIBUTION
Author(s): Maurizio Giugni, Nicola Fontana, Davide Portolano, Davide Romanelli
Department of Hydraulic and Environmental Engineering
G. Ippolito, University of Naples Federico II, Via Claudio 21, 80125 Naples, Italy,
phone: +39 081 7683443;
fax: +39 081 5938936, e-mail: email@example.com
Keyword(s): Water networks, water systems management, District Meter Areas (DMA) design, pressure patterns, physical
leaks, water losses reduction
Session: Poster session 4
The District Meter
Areas (DMA) design is an innovative methodology of water networks management, based on the pressure patterns
control and on the water flows monitoring, in order to reduce water losses and to optimize the water systems
management. A District Meter Area is an area supplied from few water inputs, into which discharges can be easily
measured to determine leaks. So, the DMA design represent an alternative to the traditional approach based on
heavy looped distribution network.
In the present paper the DMA design of the “Napoli Est” water distribution
system (approximately 70.000 customers), performed with the support of the Water Agency ARIN S.p.A. (Azienda
Risorse Idriche Napoli), is discussed.
After analysis of authorized consumption, by means of a monitoring
campaign of water fluxes over the area, the system water balance was performed, showing significant water losses,
as a consequence of high pressure patterns. This situation was confirmed by the high number of maintenance
operations performed in the area during the last years. In order to characterize the piezometric head on the network,
ARIN S.p.A. supplied to the installation of six pressure transducers in the most vulnerable areas. The water level in
the reservoir was also measured in order to estimate its influence on the network pressure head.
simulations were carried out with the EPANET software version 2.0 (Rossman, 2000) applied to a network layout
resulted from the system “skeletonization” (Hamberg e Shamir, 1988), achieved by eliminating out of order pipes,
integrating pipelines of same diameter and roughness, replacing dead-end branches and small networks supplied by a
single junction with an equivalent flow.
After the skeletonizated network was calibrated, several hypothesis of
designing and implementing DMA to reduce physical losses were performed, providing adequate operating pressure
of the system and performing many numerical simulations to guarantee adequate head pressure especially for peak
hours demand, break of transmission mains and fire hydrant service. A chlorine residuals analysis was also effected,
by simulating the transport and decay of chlorine through the network.
Six District Meter Areas, therefore, were
designed, and the corresponding hydraulic and water quality investigations and simulations were carried out. A
remarkable water saving was achieved, approximately equal to 34% of the physical losses, corresponding to 16% of
system input volume.
Actually ARIN S.p.A. is implementing and monitoring the six District Meter Areas planned.
A preliminary comparison of numerical simulations with experimental measures showed satisfactory results.