"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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Newbie question - importing precipitation files
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I've tooled around the forum for a while, but if there are easy hits on this topic they're eluding me.
All I want to know (for now, at least) is where to find and how to import precipitation data into SWMM5 for a rain gage.
I've downloaded files from the NCDC (DSI 3240), which come out as TXT files, either comma or space delimited. Are these useful to SWMM? It wants a DAT file, can I just change the filetype? Is the formatting of the NCDC's files alright for SWMM? I am in the process of trying to test this out a bit on my own, but thought it might be worth asking the group in the event that I can't figure it out on my own.
Any hints appreciated. Thanks!
Derek
Replies to This Discussion
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Permalink Reply by Robert Dickinson on -
Hi,
SWMM 5 will read and detect a variety of NWS and Canadian files - it figures out the format from parsing th e format of the data. It really does not matter if the extension is .dat or .txt - though it has a default of .dat. NCDC is one of the formats that it reads.
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Permalink Reply by Derek Schilling on -
Thanks for the quick response.
Does it matter if the file is space or comma or fixed-width delimited?
D
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Permalink Reply by Derek Schilling on
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Nevermind - got it :)
D
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Permalink Reply by Robert Dickinson on
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In general these are the formats it recognizes for the next person
// The following types of external data files are supported:
// NWS_TAPE: NCDC NWS TD 3240 or 3260 data in fixed field widths
// NWS_SPACE_DELIMITED: NCDC NWS TD (DSI) 3240 or 3260 data in space delimited
// format, with or without header lines, with or without //(5.0.015 - LR)
// station name //(5.0.015 - LR)
// NWS_COMMA_DELIMITED: NCDC NWS TD (DSI) 3240 or 3260 data in comma delimited
// format, with or without header lines
// AES_HLY: Canadian AES hourly data with 3-digit year
// CMC_HLY: Canadian CMC hourly data in HLY03 or HLY21 format
// CMC_FIF: Canadian CMC fifteen minute data in in FIF21 format
// STD_SPACE_DELIMITED: standard SWMM space delimted format:
// StaID Year Month Day Hour Minute Rainfall
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