09-06-2010, 09:33 AM
ska51 wrote:-
……working in water supply like BossStormNet, WaterCAD etc…… I would suggest to use SWMM model to work for urban water
management system. ……..
Comment:-
Please not that BossStormNet and SWMM are not for the design of water supply network. They are for storm, sewage and wastewater systems’ design/management.
hazus wrote:-
…..Then you calculate 1- pic hourly demand Qphd, 2- specific
flow Qsf=Qphd/TOT lenghth of network 3- demand flow per
pipe : Qfp=Qsf*L (pipe) 4- demand in the nodes assuming that
every pipe will offer 50% in the beginning and 50% in the end
All this calculation is necessary to apply hardy cross method to calculate
diameter, pressure, flows, velocity, tank elevation, pumps...
Comment:- That’s a good and an elaborate guide.
If you are using any of the software (at least EPANET), you do not have the need to calculate most of the parameters as enumerated above. You only have to establish your demand, the positions, elevations, the appurtenances of the your network and the software will do the rest. For a beginning, it would be very useful to evaluate the parameters enumerated above as to have a feel of the design(though not necessary as to get the programmes running).
Regards
Teddy
……working in water supply like BossStormNet, WaterCAD etc…… I would suggest to use SWMM model to work for urban water
management system. ……..
Comment:-
Please not that BossStormNet and SWMM are not for the design of water supply network. They are for storm, sewage and wastewater systems’ design/management.
hazus wrote:-
…..Then you calculate 1- pic hourly demand Qphd, 2- specific
flow Qsf=Qphd/TOT lenghth of network 3- demand flow per
pipe : Qfp=Qsf*L (pipe) 4- demand in the nodes assuming that
every pipe will offer 50% in the beginning and 50% in the end
All this calculation is necessary to apply hardy cross method to calculate
diameter, pressure, flows, velocity, tank elevation, pumps...
Comment:- That’s a good and an elaborate guide.
If you are using any of the software (at least EPANET), you do not have the need to calculate most of the parameters as enumerated above. You only have to establish your demand, the positions, elevations, the appurtenances of the your network and the software will do the rest. For a beginning, it would be very useful to evaluate the parameters enumerated above as to have a feel of the design(though not necessary as to get the programmes running).
Regards
Teddy