SWMM56

Fifty Years of Watershed Modeling – Past, Present and Future September 24-26, 2012 Boulder, Colorado On behalf of Engineering Conferences International and the conference chairs,  Anthony S. Donigian, Jr.  (AQUA TERRA Consultants), and Richard Field  (US Environmental Protection Agency/ORD [retired], Michael J. Baker Jr., Inc.), it is my pleasure to extend this invitation to you to participate in  Fifty Years of Watershed Modeling – Past, Present and Future  to be held September 24-26, 2012 at NCAR (National Center for Atmospheric Research – Center Green Campus) in Boulder, Colorado. Continuous Simulation using SWMM 5 LID and Groundwater Features in a Linked 1D/2D Network using InfoSWMM 2D for a 50 Year Period has been accepted for  Poster Presentation  at the forthcoming conference  Fifty Years of Watershed Modeling: Past, Present and Future  to be held September 24-26, 2012 at  National Center for Atmospheric Research (NCAR – Cent...

InfoSWMM v11.1: Support ArcGIS 10.1. InfoSWMM or H2OMAP SWMM import: corrected the typos in error messages. (HsHxfSvr.dll, N/A, 6/22/2012) Improvement: for better hours/minutes listing in Report Manager Report Table for Continuous Simulation with Odd Report Time Step Intervals.  For example, this fix improved the output time display for irregular (in 60 minute sense) output time steps.  Now it displays 00:50, 01:40, etc. more correctly than before (00:49, 01:39, etc). (HsOutPkg.dll, N/A, 6/21/2012) Improvement or Bug Fix: Added an IF statement to the RDII Unit Hydrograph Convolution for the  rare instances in which the user sets the time base of the UH to zero by setting either T or K to zero.  The Time Base is T*K in the convolution integral and zero values are not allowed.  This bug was also forwarded to the EPA for a future SWMM 5.  The convolution uses the value of R and the Time Base to estimate the amount of Infiltration and Inflow in the Sewer Networ...

How Good Were Climate Models 30 Years Ago? July 17, 2012  by ADAM FRANK   http://www.npr.org/blogs/13.7/ Geet Jan van Oldenborg Models vs Reality: Gray lines are predictions from 1981 models of global temperature increase. Red line is real world data. Pretty good it appears. In a piece back in April at  RealClimate ,  guest bloggers  Geert Jan van Oldenborgh and Rein Haarsma of the Dutch Meterological Institute ( KNMI ) look at back at a 1981  paper  by the now famous James Hansen and others. At the time, of course, neither Hansen or global warming were household names. Still the paper got noticed. As the Oldenborgh and Haarsma explain: "They got 10 pages in Science, which is a lot, but in it they cover radiation balance, 1D and 3D modelling, climate sensitivity, the main feedbacks (water vapour, lapse rate, clouds, ice- and vegetation albedo); solar and volcanic forcing; the uncertainties of aerosol forcings; and ocean heat uptake." The Hansen et...

Subject:    How is the Soil Saturated Conductivity Used in SWMM 5 Green-Ampt? How is the Soil Saturated Conductivity Used in SWMM 5 Green-Ampt? by  dickinsonre Subject:    How is the Soil Saturated Conductivit y Used in SWMM 5 Green-Ampt? How sensitive is the infiltration loss and rate to the Soil Saturated Conductivit y parameter in the SWMM 5 Green-Ampt   infiltration method.   Figure 2 shows how the total infiltration loss and total loss rate vary as you change the soil saturated conductivit y from 1 to 0.1 to 0.01 inches/hour.  Internally, Ks is used to check saturation and in the computation of the soil infiltration rate. Two of the checks are: ·          In low rainfall everything infiltrates as irate less than Infil>Ks and ·       ...

Subject:    How is Capillary Suction Head Used in SWMM 5 Green-Ampt? How is Capillary Suction Head Used in SWMM 5 Green-Ampt? by  dickinsonre Subject:    How is Capillary Suction Head Used  in SWMM 5 Green-Ampt? How sensitive is the infiltration loss and rate to the capillary suction head  parameter in the SWMM 5 Green-Ampt   infiltration method.   Figure         1 shows how the total infiltration loss and total loss rate vary as you change the suction head from 12 to 6 to 3 inches.    Internally the suction head is used in infil.c of SWMM 5 by adding the suction head to the ponded water on the pervious area in the parameter c1 of the implicit Green-Ampt SWMM5 solution. C1 =  (Suction Head + Depth of Ponded Water) * IMD o...

Subject:    How Does the Green Ampt Initial Moisture Deficit Work in SWMM 5? How Does the Green Ampt Initial Moisture Defiict Work in InfoSWMM and SWMM 5? by  dickinsonre Subject:    How Does the Green Ampt Initial Moisture Defiict Work in InfoSWMM and SWMM 5? This graph shows the values of the internal SWMM 5 parameters for Green Ampt Infiltration for the pervious area of a Subcatchment during a simulation.  The parameters are: ·          Soil Moisture = IMD  Max – (FUMax – FU)/Upper Soil Zone D epth ·          FU or current moisture content of the upper zone of the of the soil ·          FUMax which is the saturated moisture content of the upper zone in feet and stays constant during the simulat...

Subject:   How Does Green Ampt Cumulative Event Infiltration work in SWMM 5? How Does Green Ampt Cumulative Event Infiltration work in SWMM 5? by  dickinsonre Subject:   How Does Green Ampt Cumulative  Event Infiltration work in SW MM 5? This graph shows the values of the internal SWMM 5 parameters for Green Ampt Infiltration  for the pervious area of a Subcatchment during a simulation.  The parameters are: ·          F or FTOT which is the cumulative event infiltrat ion at the start of a time interval in the internal units of feet in SWMM 5, ·          FU or current moisture content of the upper zone of the of the soil ·          FUMAX which is the saturated moisture content of the upper zone in feet and s...

Subject:   How does the Infiltration Maximum Time to Drain the Upper Soil Zone Work in SWMM 5 Green Ampt? How does the Infiltration Maximum Time to Drain the Upper Soil Zone Work in SWMM 5 Green Ampt? by  dickinsonre Subject:   How does the  Infiltration Maxi mum Time to Drain the Upper So il Zone  Work in SWMM 5 Green A mpt? You can use the monthly soil recovery factor (Figure 1) in SWMM 5 to change how the Infiltration Maximum Time  to Drain the Upper Soil Zone ( Figure 2) is computed each month during a continuous simulation.  The  depth of the upper soil zone in the internal  SWMM 5 units of feet is calculated at the start of the simulation based on the Green Ampt Soil Saturated Hydraulic Conductivity Upper Soil Zone Dept...

A Canopy of Man-Made Solar-Powered Supertrees Flourishes in Singapore A national park filled with electrified, man-made trees sounds like a paradox. But Singapore’s latest landscaping project, a 250-acre site called  Gardens by the Bay , mixes nature and mechanics with an "artificial forest" full of glowing trees, globally-sourced plants, heritage vegetation, and a conservatory built around a 35-meter mountain complete with the world's tallest indoor waterfall. The project is pushing the boundary of what an urban park can be. On June 29, Singapore’s National Parks Board will open a section of this project, called Bay South Garden, to the public, welcoming visitors to 18 just-installed "Supertrees," climbing to 50 meters in height. "Many countries now do tree-planting and call themselves garden cities," CEO of Gardens by the Bay, Dr. Kiat Tan explained in a 2011 speech. "To retain our edge and continue to improve our living environment, we have bee...

Virginia Lawmaker Says ‘Sea Level Rise’ Is A ‘Left Wing Term,’ Excises It From State Report On Coastal Flooding By  Rebecca Leber  posted from  Climate Progress  on Jun 10, 2012 at 6:59 pm Virginia’s legislature commissioned a $50,000 study to determine the impacts of climate change on the state’s shores. To greenlight the project, they   omitted words   like “climate change” and “sea level rise” from the study’s description itself. According to the House of Delegates sponsor of the study, these are “liberal code words,” even though they are noncontroversial in the climate science community. Instead of using climate change, sea level rise, and global warming, the study uses terms like “coastal resiliency” and “recurrent flooding.” Republican State Delegate Chris Stolle, who steered the legislation, cut “sea level rise” from the draft. Stolle has also said the “ jury’s still out ” on humans’ impact on global warming: State Del. Chris Stolle, R-Virginia Bea...