Showing posts with the label Hydrology

Many Water Cycle Images that look Great

Water Cycle (Cycle de l'eau - Cycle hydrologique) #STORMWATER#WATER@InnovyzeDavid — Robert Dickinson (@InnovyzeRobert) January 10, 2016

Soil Water Characteristic Estimates by Texture and Organic Matter for Hydrologic Solutions Saxton and W. J. Rawls

1/ Soil Water Characteristic Estimates by Texture and Organic Matter for Hydrologic Solutions Saxton and W. J. Rawls — Robert Dickinson (@InnovyzeRobert) November 8, 2015
2/ Soil Water Characteristic Estimates by Texture and Organic Matter — Robert Dickinson (@InnovyzeRobert) November 8, 2015

@Innovze has RDII Flow at the Subcatchment Level in ICM and IWCS and at the node level in InfoSWMM and H2OMap SWMM.

@Innovze has RDII Flow at the Subcatchment Level in ICM and IWCS and at the node level in InfoSWMM and H2OMap SWMM. Lateral Inflow In InfoSWMM and SWMM5 consists of Runoff, DWF, Inflow and RDII Flow
— RDickinson (@RDickinson) January 1, 2014

Initial Moisture Deficit or IMD for a 100 Year SWMM 5 Simulation for Green Ampt Infiltration

Introduction:  This set of blogs uses the 1000 year rainfall/runoff/hydraulics model that you can download at to show the inner workings of SWMM 5 and by extension InfoSWMM and H2oMap SWMM using a QA/QC version of SWMM 5 with extended graphics.   I always hope that seeing the inner workings of a SWMM 5 feature helps to understand the code, sensitivity and importance of a parameter.   It also helps show sometimes when a parameter is not important.   In this example, we show some of the internal working of the Green Ampt Infiltration Parameters over the 100 year period.  The IMD is normally near the initial user defined value but it can go to zero during the course of the simulation (Figure 1)
Discussion:  A key internal and user defined parameter is the Green Ampt Infiltration parameter Initial Moisture Deficit.  It starts out at the user Initial Deficit and then is computed at each hydrology time step…

How Clouds Move from Starts with a Bang

An interesting post from Starts with a Bang about moving clouds in one large Image. The daytime photo techniques are incredible for showing how clouds move over time and appear to smear out across the sky, painting a glorious natural picture. Image credit: Matt Molloy. When even more frames are added, it can produce skies that look like they’re straight out of a painting. Image credit: Matt Molloy. But the photos that blew me away the most were the ones that combined day-and-night in a way I’d never before imagined: not only with sunsets and clouds, but with the color of the aurorae thrown in there, too! Image credit: Matt Molloy. Image credit: Matt Molloy. Matt’s photos are truly works of art to be marveled at, and you can purchase them here. There’s also an interview with the 29-year-old Canadian photographer, where he reveals that these sunset track images typically consist of 100 to 200 p…

How to Define Green Ampt Infiltration in ICM

Here are the steps to make a Subcatchment with Green Ampt Infiltration in ICM:

1.You use the Subcatchment, Land Use and Runoff Surface Tabs in the Subcatchment Grid (Bullet 1)
2.The Subcatchment Tab has three Runoff Areas for Impervious with Depression Storage or Initial Loss, Impervious with no Initial Loss and Pervious Area (Bullet 2)
3.The Runoff Surface percentages on the Subcatchment are connected to the Land Use Tab by the Land Use ID, in this example we are using Runoff Surfaces 22, 23 and 24 (Bullet 3)
4.The Runoff Tab defines the Runoff Surfaces defined in the Subcatchment Tab and Land Use Tab (Bullet 4)
5.You can define the Routing Model per Runoff Surface or SWMM in this case (Bullet 5)
6.The type of Runoff Surface and Surface Type for each Runoff Surface or GreenAmpt for Runoff Surface ID of 24 (Bullet 6)
7.The Depression Storage or Initial Loss Value for each Runoff Surface in the Runoff Surface Tab (Bullet 7)
8.The Green Ampt Infiltration Parameters are defined to the rig…

Colorado’s Flooding Becomes A 1,000 Year Event As Rescuers Search For 500 Missing People

Colorado’s Flooding Becomes A 1,000 Year Event As Rescuers Search For 500 Missing PeopleBY KATIE VALENTINE ON SEPTEMBER 15, 2013 AT 12:18 PM, CREDIT: AP/Colorado Heli-Ops, Dennis Pierce Boulder County, Colorado is bracing for up to four more inches of rain Sunday afternoon, a forecast that Colorado Gov. John Hickenlooper says would magnify the problems rescuers are already facing in trying to reach stranded residents. Hickenlooper said on CNN’s State of the Union Sunday that the forecast of more rain in a region that’s received more than 14 inches in the last week is troubling because the ground is already saturated with water, making it easy for more rain to lead to even more flooding. So far, rescuers have moved 2,000 people out of Boulder, but 500 are still missing and at least four have been killed. This week’s rain has already washed away roads leading into smaller valley regions, Hickenlooper said, and more rai…

Innovyze Ships Generation V10 of Industry-Leading InfoWater UDF, Raising the Bar for Unidirectional Flushing of Water Distribution Systems

Innovyze does not send unsolicited e-mail. This message is intended for members of the Water and Wastewater Industries only and we hope that you find it informative and useful. However, if you have received this message in error or would like to be removed, please use the link at the bottom of this message to update your notification settings. View this email in your browser Press Room | Products | News | Events | The Company Innovyze Ships Generation V10 of Industry-Leading InfoWater UDF, Raising the Bar for Unidirectional Flushing of Water Distribution Systems New Technology Enhancements Enable Faster Model Creation and Optimized Performance, Delivering Even More Power to Clean Mains, Restore Hydraulic Integrity and Enhance Water Quality Broomfield, Colorado, USA, August 13, 2013 — Innovyze, a leading global innovator of business analytics software and technologies for smart wet infrastructure, today announced the worldwide release of Generation V10 of InfoWater UDF, its industry-leadin…

How to use the Report Feature of the HGL Plot in InfoSWMM

Subject:   How to use the ReportFeature of the HGLPlot in InfoSWMM
The reportfeature of the HGLplot helps you understand in more detail the pump flows, forcemain flows and node heads.
Step 1. Load the Domain in the HGLPlot using Report Manager

Step 2. Click on the Report Command to Show the HGL Data in Tabular Format

Step 3.  Format the Results Table from the HGLPlot to see the data better.

Step 4.  Now we have the heads, flows and velocities for the pumps, nodes and force main links in our Domain around the pump of interest at time steps of 2 seconds,  We can now see how the flows, heads and velocities change downstream from the pump.

Step 5.  Force Mains, Nodes and Pumps in our Table
Step 6.  The pump turns on and the flow moves downstream to the force mains – the heads in the nodes increase to balance the flow at each node.  As you can see there is a 1 to 2 GPM decrease due to attenuation as the flow from the pump moves into the force mains.

Step 7.  The pump turns off and flows downstream…

How to Set Up Hot Start Files in InfoSWMM for a Fixed Boundary Outfall

Subject:  How to SetUpHotStartFiles in InfoSWMM for a FixedBoundaryOutfall
If you have a fixedboundaryoutfall condition in your model and want to prevent reverse flow when you run your simulation the best way is to use the HotStartfiles to fill up the links and nodes at the start of the simulation.
1st Step:  Turn off the DWF inflow so that ONLY the flow from outfall enters the network.  Use the Process Models in Run Manager to turn off and turn on the Dry Weather flow.

2nd Step:  Run the simulation first SAVING a HotStart File using zero initial node depths and link flows.

3rd Step:  Save and Use HotStartFiles until the initial and final volume in your Network stays the same. 

4th Step:  Check the Initial and Final Stored Volume in the output text file

5th Step:  Check to see if you nodes are stable by using a Junction Group Graph

6th Step:  Now Run the Simulation with flows turned an and the network will start out with the Boundary Condition depths and stable flows

3 Types of Subcatchment Flow in SWMM 5

Subject:3Types of SubcatchmentFlow in SWMM5
There are three types of Subcatchmentflow in SWMM5
1.Impervious area with depression storagein which the runoff from the precipitation is delayed due to the depression storage.Evaporation occurs based on the depth of water in the subarea of theSubcatchment. 2.   Impervious area without depression storage in which the runoff from precipitation is NOT delayed.  Evaporation does occur based on the depth of water in the subarea of the Subcatchment.
3.   Pervious area with depression storage in which the runoff from the precipitation is delayed due to the depression storage.  Evaporation and Infiltration occurs based on the depth of water in the subarea of theSubcatchment.

How to Set a Flap Gate in InfoSWMM

Note:  How to Set a FlapGate in InfoSWMM
You can set a flapgate in InfoSWMM either by using the attribute browser and changing the FlapGate Installed to Yes or No or by using the DB Editor and changing the Flag for FlapGate Installed to Yes by using the Block Edit tool.   The DB method is better for changing many conduits. 

SWMM 5 Arrow Direction Question

A question often asked is what happens to the flow in a SWMM5 link if the downstream and upstream node names are entered in reverse.    The flow will be exactly the same as if the nodes were entered in the right order but the flow in the link will be negative.  As long as the inflow to the model is at the same node in both alternate models the node depth, the link upstream depths and upstream cross sectional areas will be the same.  For example, the flow out of Nodes 80408A and 80408 will be the same but the flow out of 80408 will be negative and the flow out of 80408A will be positive.

SWMM 5, H2OMap SWMM and InfoSWMM Time Step Guide

Subject: SWMM 5, H2OMap SWMM and InfoSWMM Time Step Guide
If you use a variable timestep in SWMM5 or InfoSWMM/H2OMAP SWMM it is hard to gauge the proper value of the conduit lengthening.  You want to use a value that does not increase the volume of the network yet does increase the length of the shortest links so you can use a longer timestep.  A good approximation to the timestep that you want to use is shown in the image.  
The TimeStepGuide in seconds is Link Length / [Velocity + sqrt(g*Maximum Depth)] with the assumption that the velocity at maximum depth is about the value of the wave celerity for closed links or sqrt(g*Maximum Depth).  Normally (unless pumps are involved) the average timestep used during the simulation is a good gauge of the time to use for the simulation.  For example, in this model run the timestep used is 13 seconds which is about the conduit lengthening timestep of 20 seconds * adjustment factor of 0.75

How to Use Domain Manager in InfoSWMM to Reduce the Output File Size

Subject:   How to UseDomainManager in InfoSWMM to Reduce the OutputFileSize
If you want to save the output at a small report time step (2 seconds in this case) and you have a long simulation or large model then the reading of the graphicalo results may not be as speedy as you want.  You can save ONLY the DOMAIN to the output binary file however to make this smaller and faster to react.
Step 1.  Define your Reporting Time Step and Your Routing Time Step.  In this case we are routing at 1 second but saving the DOMAIN results every 2 seconds.
Step 2.  Clear your existing DOMAIN and Create a DOMAIN based on the area you are most interested in during the simulation. Step 3.Use the Advanced Tab in Run Manager and select Domain as the Output Scope – this will save only the Domain to the output binary file.
Step 4.  Run the simulation using Run Manager and then look at the output.  You are restricted to 8800 graph points but the number of points in the Report Table is unlimited.

Step 5. You can use…

InfoSWMM Report Manager and Field Statistics

Subject:InfoSWMMReportManager and FieldStatistics
You can also use the mixed graph feature to plot the pump flow and the downstream flows on the same graph.  If you click on the Report command then you can also use aFieldStatistics command to see the Statistics for each Link and Pump.   The right mouse button for the Report also allows you to make a scatter plot and graph the flows in theforcemains versus the flows in the pumps.