SWMM56

Subject:   RDII Parameters for SWMM 5 There are three types of RDII Response, six different parameters and an annual and optional twelve monthly sets of distinct parameters. RDII Parameters for SWMM 5 by  dickinsonre Subject:    RDII   Parameters  for  SWMM   5 There are three types of  RDII  Response, six different  parameters  and an annual and optional twelve monthly sets of distinct parameters .

Subject:   RDII Initial Abstraction in SWMM 5 RDII Initial Abstraction in SWMM 5 by  dickinsonre Subject:    RDII   Initial   Abstrac tion  in  SWMM   5   The  initial   abstraction  in each of the three components of  RDII  in  SWMM   5  are updated at each time step.  The  initial abstraction   (ia) is:   ia = iaMax - iaUsed   based on the maximum amount of ia, the ia used (iaUsed), the recovery rate (iaRecov) and the month and class of  RDII .  You can enter a value for iaMax, iaInit and iaRecov for each month.     The iaUsed at the beginning of the simulation is set equal to iaInit and if there is no rainfall via Blogger  http://www.swmm5.net/2013/08/ rdii-initial-abstraction-in- swmm-5.html

Subject:   The Groundwater flow in SWMM 5 Groundwater The Groundwater Flow Component in SWMM5 by  dickinsonre Subject:   The  Groundwater   flow  in  SWMM   5   Groundwater   The  Groundwater   flow  in  SWMM   5  is actually made up of three components:   1.    A  groundwater   flow   computed from the coefficient a1 and exponent b1 2.    A  groundwater   flow   computed from the coefficient a2 and exponent b2 and 3.    A Surface Water /  Groundwater  Interaction coefficient a3 The total  Groundwater   flow  is the sum of the  flow  from 1, 2 and 3 – normally 2 is the opposite of 1. via Blogger  http://www.swmm5.net/2013/08/ the-groundwater-flow- component-in-swmm5.html

Subject:   Exit, Other and Entrance Loss Values in SWMM 5 The entrance, exit and other losses in SWMM 5 are computed at the upstream, downstream and midpoint of the sections of the link.  However, if the normal flow equation is used for the link during a time step then these losses are zero as the flow in the link is based solely on the upstream area and upstream hydraulic radius of the link.   If you add loss coefficients and the normal flow equation is used then you will not see any change in the flow as you modify the loss coefficients. Exit, Other and Entrance Loss Values in SWMM 5 by  dickinsonre Subject:    Exit ,  Other  and  Entr ance   Loss   Values  in  SWMM   5 The  entrance ,  exit  and  other   losses in  SWMM   5  are computed at the upstream, downstream and midpoint of the sections of the link.  However, if the normal flow equation is used for the link during a time step then these losses are zero as the flow in the link is based solely on the upstream area and upstream

Subject:   Link Simulated Parameters used in either the Normal Flow or St Venant Equation of SWMM 5 St. Venant equation – this is the link attribute data used when the St. Venant Equation is used in SWMM 5.  Simulated Parameters from the upstream, midpoint and downstream sections of the link are used. Normal Flow Equation – this is the link attribute data used when the Normal Flow Equation is used in SWMM 5. Only simulated parameters from the upstream end of the link are used if the normal flow equation is used for the time step. Link Simulated Parameters used in either the Normal Flow or St Venant Equation of SWMM 5 by  dickinsonre Subject:    Link   Simulated   Param eters   used  in  either  the  Norma l   Flow  or  St   Venant   Equation   of  SWMM   5 St .  Venant   equation  – this is the  link  attribute data  used  when the  St .  Venant   Equation  is  use d  in  SWMM   5 .   Simulated   Parame ters  from the upstream, midpoint and downstream sections of the  link  are  use

Subject:   Green Roof LID Control in SWMM 5 I saw this on the Daily Dish, http://andrewsullivan.thedailybeast.com/2011/07/roo.html , it is an extremely green roof but a roof that can be simulated in SWMM 5.  You simulated it as a Bio Retention Cell with a Surface, Soil, Storage and an Underdrain to the Gutters of the roof.  You can also have a rain barrel connected to the gutters to storage and drain the rainfall.  

Note:   Weir and Orifice Flow Equations for a Weir in SWMM 5 If you use a weir in SWMM 5 then two flow equations are used 1.        The weir uses the weir flow equation when the head at the weir is between the invert elevation of the weir and the crown of the weir and   2.       An orifice equation when the head is above the weir crown or the weir is submerged. Weir and Orifice Flow Equations for a Weir in SWMM 5 by  dickinsonre Note:    Weir  and  Orifice   Flow   E quations  for a  Weir  in  SWMM   5 If you use a  weir  in  SWMM   5  then two  flow   equations  are used 1.        The  weir  uses the  weir   flow  equation when the head at the  weir  is between the invert elevation of the  weir  and the crown of the  weir  and 2.       An  orifice  equation when the head is above the  weir  crown or the  weir  is submerged. via Blogger  http://www.swmm5.net/2013/08/ weir-and-orifice-flow- equations-for.html

Philadelphia Low Impact  Development Symposium Greening the Urban Environment September 25-28, 2011, Philadelphia, PA Image courtesy of  Philadelphia Water Dept . Home Program Abstract Submission Registration Contact Us Sunday, September 25, 2011 9:00am - 4:30pm Pre-Conference Workshops 9:00am - 12:00pm - LID 101: Basic Concepts and Applications 9:00am - 12:00pm - Extensive Green Roof Design for Civil/Stormwater Engineers 1:00pm - 4:30pm - LID 201: Design Guidelines for LID Practices 1:00pm - 4:30pm - Permeable/Pervious Pavement Workshop descriptions can be found by clicking here. Pre-Conference Workshops 9:00am - 4:30pm Commonwealth Rooms Monday, September 26 - Plenary Session Mr. Howard Neukrug  Commissioner Philadelphia Water Department We are pleased to have Commissioner Howard Neukrug of the Philadelphia Water Department as our Plenary Speaker. Commissioner Neukrug has been the driving force behind the Green City, Clean Waters approach to solutions to the city's Combined Sewer