"At the Summit of Olympus Mons
Credit: G. Neukum (FU Berlin) et al., DLR, ESA
From martian orbit, the Mars Express cameras looked down on the largest volcano in the solar system. The result was this stunningly detailed overhead view of the…"
SWMM5 - Stormwater Management Model
SWMM 5, InfoSWMM, H20MAP SWMM, InfoSewer for Water Quality,Hydrology, Hydraulics
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Robert Dickinson replied to Robert Dickinson's discussion How is the St Venant Equation Solved for in the Dynamic Wave Solution of SWMM 5?"Subject: Link Iterations in the SWMM 5 Dynamic Wave Solution
Each of the links in the SWMM 5 network can use up to 8 iterations to reach convergence during a time step in the dynamic wave solution of SWMM 5. The rules…"
Robert Dickinson left a comment for wu ze jian"Hi, I added this discussion http://swmm2000.com/forum/topics/how-is-the-st-venant-equation-solved-for-in-the-dynamic-wave-solu"
Robert Dickinson posted a discussionHow is the St Venant Equation Solved for in the Dynamic Wave Solution of SWMM 5?
Subject: How is the St Venant Equation Solved for in the Dynamic Wave Solution of SWMM 5? An explanation of the four St. Venant Terms in SWMM 5 and how they change for Gravity Mains and Force Mains. The HGL is the water surface elevation in the upstream and downstream nodes of the link. The HGL for a full link goes from the pipe crown elevation up to the rim elevation of the node + the surcharge depth of the node. The four terms are: dq2 = Time Step * Awtd * (Head Downstream – Head Upstream)…See More
Robert Dickinson added a page to the group Hydraulics
Force Main Friction Loss in InfoSWMM and the Transition from Partial to Full Flow
Subject: Force Main Friction Loss in InfoSWMM and the Transition from Partial to Full Flow
You can model Force Main friction loss in InfoSWMM using either Darcy Weisbach or Hazen Williams as the full pipe friction loss method (see Figure 1 for the…
Robert Dickinson's blog post was featuredSWMM 5 Precipitation Options
Subject: SWMM 5 Precipitation Options You can have design storms, monitored storms of any length of the time from minutes to centuries, use intensity, volume or cumulative precipitation, use both rainfall and snowfall in the same rain gage depending on temperature, use both time series or external files for the rain gage and have unlimited rain gages with the limitation of one rain gage per subcatchment. …See More
Robert Dickinson posted a blog postSWMM 5 Precipitation Options
Subject: SWMM 5 Precipitation Options You can have design storms, monitored storms of any length of the time from minutes to centuries, use intensity, volume or cumulative precipitation, use both rainfall and snowfall in the same rain gage depending on temperature, use both time series or external files for the rain gage and have unlimited rain gages with the limitation of one rain gage per subcatchment. …See More
Robert Dickinson commented on Robert Dickinson's group Stream of Information"Pacheena Indian Reserve, British Columbia, Canada
May. 25, 2012
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Robert Dickinson commented on Robert Dickinson's group Stream of Information"All the Water on Europa Illustration Credit & Copyright: Kevin Hand (JPL/Caltech), Jack Cook (Woods Hole Oceanographic Institution), Howard Perlman (USGS)
Explanation: How much of Jupiter's moon…"
Robert Dickinson commented on Robert Dickinson's group Water Quality"URBAN STORMWATER QUANTITY/QUALITY MODELING USING THE SCS METHOD AND EMPIRICAL EQUATIONS†
http://onlinelibrary.wiley.com/doi/10.1111/j.1752-1688.1997.tb04093.x/abstract
May 24, 2012
Wiley Online Library will be disrupted on 26 May from…"
Robert Dickinson commented on Robert Dickinson's group Water Quality"Hi MeHa, Here is one good source of data, I also have the SWMM 5 models for the USGS areas.
http://www.1000friendsofflorida.org/pubs/stmarksgreen/apend4.asp
http://sofia.usgs.gov/publications/ofr/78-324/ofr-78-324.pdf
"
MeHa commented on Robert Dickinson's group Water Quality"I want to model WQ of sewers. Can any body provide me a network with real measured calibration files? "
MeHa posted a status"Hello, When designing a sewer system, we consider the Node Flooding and Conduit surcharge in the status report. Is there any guideline which"
Quah Soon Tong left a comment for Esther Bergareche Auricenea"Hi Esther, I am not sure you are the same Esther that was at the United World College in South Wales with me. I am Quah Soon Tong from Singapore. I noticed you are also an engineer. I did Civil Engineering at Cambridge University, but practised as…"
Robert Dickinson commented on Robert Dickinson's group Stream of Information"River Canyon
May. 23, 2012
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Robert Dickinson commented on Robert Dickinson's group Stream of Information"Litla Dimun, Faroe Islands
May. 23, 2012
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Question : Quality surface buildup - report
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Hi!
I want to clarify something. I am running a long term simulation to know the charge of fecal coliform in the summer.
This is the report:
************************** CF
Runoff Quality Continuity LogN
************************** ----------
Initial Buildup .......... 0.000
Surface Buildup .......... 14.254
Wet Deposition ........... 0.000
Sweeping Removal ......... 0.000
Infiltration Loss ........ 0.000
BMP Removal .............. 0.000
Surface Runoff ........... 14.254
Remaining Buildup ........ 0.000
Continuity Error (%) ..... 0.000
I want to clarify the meaning of "surface buildup". To calculate the total load, have I to multiply "surface buildup" with "Surface Runoff" with "the total area" ????
thanks for your reply
Amélie
Replies to This Discussion
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Permalink Reply by Robert Dickinson on -
The names in SWMM 4 were more meaningful but in SWMM 5 the Surface Runoff corresponds to the Washoff. You had a buildup of 14 logN and a Washoff of the same. The Washoff or Surface Runoff in the Water Quality table already is concentration * flow internally in SWMM 5.
I hope this helps.
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Permalink Reply by Robert Dickinson on
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Initial Buildup .......... 0.000 this is the initial user defined buildup
Surface Buildup .......... 14.254 this is the buildup during the simulation
Wet Deposition ........... 0.000 this is the precipitation load
Sweeping Removal ......... 0.000 this is the sweeping load removal
Infiltration Loss ........ 0.000 loss out of ponds and lakes
BMP Removal .............. 0.000 loss out of BMP'S
Surface Runoff ........... 14.254 here is your Washoff - C * Flow
Remaining Buildup ........ 0.000 is there anything left to washoff?
Continuity Error (%) ..... 0.000 perfect - you have a zero CE model
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Permalink Reply by Amélie Thériault on -
Hi Mrs Dickinson,
Thanks for the reply.
For the question above : There is no remaining buildup because I use the EMC with 100% efficiency.
On more time, just to be sure (english is not my fisrt language) : I can measure the total load of fecal coliform like this : exp(14.254) = 1.6x10^6 #of fecal coliform. Is that right?
Thanks,
amélie
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Permalink Reply by Robert Dickinson on
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Sorry, for my poor interpretation of your question but yes you answer is right - the exp will give you the total number of fecal coli forms.
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