Weather Infographics
Source: http://visual.ly/cloud-types-and-pronunciations-cloud-spotting
http://visual.ly/how-forecast-weather-without-gadgets
via Blogger http://www.swmm5.net/2013/08/weather-infographics.html… Read the rest
Hydrology
Posts about runoff, groundwater, infiltration, RDII etc
#INFOSWMM, Hydrology, InfoSWMM, RTC, SWMM5
… Read the rest
Sensitivity Analysis in InfoSWMM and H2OMAP SWMM
Subject: Sensitivity Analysis in InfoSWMM and H2OMAP SWMM
It is easy to perform sensitivity analysis in InfoSWMM and H2oMAP SWMM using the Scenario Manager, Dataset manager, Block Edit in the Database Editor, Batch Simulation and theReport Manager. For example, we will do a
#INFOSWMM, Hydrology, InfoSWMM, Rossman, SWMM5
How is the Volume Calculated in the SWMM 5 Groundwater Component?
Subject: How is the Volume Calculated in the SWMM 5 Groundwater Component?
The groundwater component of SWMM 5 is found in the gwater.c code. It (as is all of SWMM 5) is excellently written in small functions by Lew Rossman of the EPA during the SWMM 5 development process. … Read the rest
#INFOSWMM, Hydrology, InfoSWMM, Rossman, SWMM5
How is the Mass Balance Calculated in the SWMM 5 Groundwater Component?
Subject: How is the Mass Balance Calculated in the SWMM 5 Groundwater Component?
The groundwater component of SWMM 5 is found in the gwater.c code. It (as is all of SWMM 5) is excellently written in small functions by Lew Rossman of the EPA during the SWMM 5… Read the rest
Hydrology, InfoSWMM, SWMM5
The Groundwater Flow Component in SWMM5
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 … Read the rest
#INFOSWMM, 2D, Hydrology, InfoSWMM, SWMM5
… Read the rest
Detention Pond Infiltration and Evaporation Losses in SWMM 5
Subject: Detention Pond Infiltration and Evaporation Losses
You can also add a storage pond infiltration and surface evaporation losses to the pond. The surface evaporation is added to theinfiltration (computed from the green ampt parameters); a storage volume summary listing the average and maximum
#INFOSWMM, 2D, Hydrology, InfoSWMM, SWMM5
The additional features supply the tools for your modeling or modelling:
1. Dry Flow Allocation for your Sanitary or Combined Sewer Model
2. Subcatchment Manager to estimate the impervious, slope, width and area of your Subcatchments,
3. RDII Analyst to estimate the Infiltration/Inflow into your Sanitary Network,… Read the rest
Additional Suite Features in InfoSWMM and H2OMAP SWMM
The additional features supply the tools for your modeling or modelling:
1. Dry Flow Allocation for your Sanitary or Combined Sewer Model
2. Subcatchment Manager to estimate the impervious, slope, width and area of your Subcatchments,
3. RDII Analyst to estimate the Infiltration/Inflow into your Sanitary Network,
#INFOSWMM, ARC GIS, Hydrology, InfoSWMM, SWMM5
InfoSWMM 11 (for ArcGIS 9, 10) and H20MAP SWMM v10 Updated for the new SWMM 5.0.022 Engine
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EPA SWMM 5 Build 5.0.022 (04/21/11)
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Engine Updates
1. The following fixes and updates were made to the LID module of the code (lid.c):
a. The Drain Delay time for a Rain Barrel LID is now correctly converted internally from hours to seconds.
b. … Read the rest
#INFOSWMM, Hydrology, InfoSWMM, SWMM5
… Read the rest
Tributary Area to a Node in SWMM 5 or InfoSWMM
Note: Tributary Area to a Node in SWMM 5 or InfoSWMM
Here are the steps you neeed to take to calculate the tributary area of a node in InfoSWMM:
Step 1: Use the DB Editor to get the total area in your model using the Data
#INFOSWMM, Hydrology, InfoSWMM, SWMM5
Drainage Wells or a Vertical Exfiltration Trench in InfoSWMM
Subject: Drainage Wells or a Vertical Exfiltration Trench in InfoSWMM
Note, this is just one way to model an Exfiltration Trench. The source for the image below is Rice Creek Watershed.
You can make a storage node to simulate the trench with the following characteristics:
· Functional or … Read the rest
#INFOSWMM, Force Mains, Hydrology, InfoSWMM, SWMM5
Pump / Force Main System in InfoSWMM and SWMM 5
Subject: Pump / Force Main System in InfoSWMM and SWMM 5
The basic system consists of:
- Wet Well and its associated physical parameters,
- Pump Type
- Defined Pump Curve,
- Downstream Pressure Node and
- Downstream Force Main
Step 1: Wet Well Data
Enter the invert elevation, maximum depth of the Wet Well, … Read the rest
#INFOSWMM, Hydrology, InfoSWMM, SWMM5
How to change the Maximum Infiltration in a DB Table of InfoSWMM and H2OMAP SWMM
Note: How to change the Maximum Infiltration in a DB Table of InfoSWMM and H2OMAP SWMM
There are a lot of methods in InfoSWMM and H20MAP SWMM to change the infiltration data. You have the ability to change it for
1. an individual subcatchment using the Attribute Browser
2. by … Read the rest
Hydrology, InfoSWMM, SWMM5
… Read the rest
The Time Base is T + T*K from the Time(T) and Storage (K) values for RDII in SWMM5
Note: Each of the RDII UH's has a base time for the convolution of the RDII from each UH. The Time Base is T + T*K from the Time(T) and Storage (K) values used in the RTK data. In this particular case:
· The Fast
Hydrology, InfoSWMM, SWMM5
SWMM 5 Aquifer has a Saturated and Unsaturated Zone
Note: The unsaturated upper zone soil moisture varies between the initial upper zone moisture fraction to the porosity fraction for the soil. The soil moisture content is for the SWMM5 Aquifer which can cover more than one Subcatchment in your simulation network.
via Blogger http://www.swmm5.net/2013/07/swmm-5-aquifer-has-saturated-and.html… Read the rest
Hydrology, InfoSWMM, SWMM5
SWMM5 Runoff and Depth Relationships
Note: The surface runoff is a non linear function of the independent depth in both the pervious and impervious areas of the subcatchments. No surface runoff occurs until the depth over either the impervious or pervious area is greater than the respective depression storage (Figure's 1, 2, 3 and 4).… Read the rest
Hydrology, InfoSWMM, SWMM5
SWMM5 Groundwater Flow Components
Note: There are three sub flow components in the calculation of the groundwater flow from a SWMM 5 Subcatchment.
1st Component: Flow = Groundwater Flow Coef. * (LowerDepth – Aquifer Bottom to Node Invert) ^ Groundwater Flow Exponent
2 nd Component: Flow = SurfaceWater Flow Coef. * … Read the rest
Hydrology, InfoSWMM, SWMM5
SWMM 5 Subcatchment Runoff and Depth Relationship
Note: The surface runoff is a non linear function of the independent depth in both the pervious and impervious areas of the subcatchments. No surface runoff occurs until the depthover either the impervious or pervious area is greater than the respective depression storage (Figure's 1, 2, 3 and 4).… Read the rest
Hydrology, InfoSWMM, LID, SWMM5
… Read the rest
What are the LID Control Flow Source Options in SWMM 5?
What are the LID Control Flow Source Options in SWMM 5?
The SWMM 5 options for Low Impact Development (LID) controls on a Subcatchment are very flexible, exciting, possibly recursive and a completely integrated method to treat both the pervious and impervious flow. You can
Hydrology, InfoSWMM, SWMM5
The relationship between the rainfall, total losses from the previous area, evaporation and infiltration only rate for SWMM 5
Subject: The relationship between the rainfall, total losses from the previous area, evaporation and infiltration only rate.
The total loss from a subcatchment pervious area is the sum of the evaporation + infiltration loss. Typically the evaporation rate is much less than the infiltration rate. SWMM… Read the rest
Hydrology, InfoSWMM, LID, Rossman, SWMM5
EPA National Stormwater Calculator
Released today by the EPA (Dr Lewis Rossman) is a USA Nationwide Stormwater Calculator
… Read the rest Here is a new tool, based on SWMM, that may be of interest. It provides non-modelers with a quick and easy way to rigorously estimate stormwater runoff volumes from their properties. For you SWMM experts, it