!
!
Bentley PondPack V8i

Detention Pond Analysis and Design

 

PondPack

 

Overview

The FEMA-approved PondPack will save you hours of manual calculation time whenanalyzing pre- and post- development hydrology. PondPack's robust analysis engine sizes ponds, develops outlet rating curves with tailwater effects, accounts for pond infiltration, calculates pond detention times, analyzes channels, performsinterconnected pond routing computations and handles divergent (multiple) outfalls.

With a single stand-alone software package, you will be able to analyze, design, manage, and plan detention pond projects of any size quickly, correctly, and within budget.

Most importantly, you will be able to submitagency ready reports. PondPack's intuitive interface allows even a novice user to produce a customized professional report complete with a table of contents and an index.

Save money with every pond design

PondPack has been delivering practical pond design and stormwater compliance to thousands of engineers for more than 15 years. The reason for PondPack's continued prominence within the industry is simple: it really does save you time with every design.

Quick and easy pond modeling; design a single pond or a complex watershed

  • Step-by-step automated pond sizing
  • Sleek new editing tools and interface
  • Start-to-finish watershed application
  • Pre- and post-development calculations
  • Agency-ready report and graph generation

Learn more about the features and benefits of PondPack.

All the technical requirements you need to run PondPack.

Read this case study: PondPack at PebbleCreek

 


Trailer
Highlights


Advantages

Interface, CAD Interoperability, and Data Management

PondPack's graphical user interface has been completely redone using the same style as StormCAD, CivilStorm, and WaterGEMS V8i. This interface streamlines network layout, data entry, and output viewing.

Layout: For the first time, PondPack users have the option to lay elements out to scale. Add DXF, shapefile or raster (such as aerial photo) background layers and trace catchments, ponds and channels over the top to scale.

Interoperability: PondPack is available in two versions: PondPack stand-alone and PondPack for AutoCAD. Both versions include a stand-alone interface (no platform requirement) and can run in MicroStation V8i and PowerCivil V8i. PondPack for AutoCAD can be run in AutoCAD 2009, 2010, or 2011.

Model building: Engineers can use ModelBuilder to create a model from external data sources, including shapefiles, Excel, Oracle Locator/spatial data. Pond elevation volume data can be imported from InRoads and PowerCivil.

Scenario management and active topology: The Scenario Management Center in PondPack gives engineers full control to configure, run, evaluate, visualize, and compare an unlimited number of scenarios within a single file. Engineers can easily make decisions by comparing alternative designs for a variety of storm events and system conditions (including pre- and post- development).

Pondpack Interface and Data Management
Enlarge Image

Automatic Design with PondMaker

One of the most difficult and time-consuming aspects of detention pond design is managing the sequence of steps required to take a pond from blank page to final design.

PondPack's PondMaker guides users through the confusing maze of pond design steps by providing a step-by-step process that provides constant feedback on how the design is progressing.

Set maximum outflow rate: Users can explicitly set the allowable pond outflow rate, or let PondMaker automatically apply pre-developed conditions for multiple storm events.

Estimate storage: Know the size of the pond before laying out the first grading plan. PondMaker leverages PondPack's precision estimate tools to establish the maximum storage requirements.

Check outlet design: PondMaker greatly reduces design iterations by automatically computing a target rating curve based on storage requirements, grading plan data, and allowable outflow rates for multiple return events.

Check final design: PondMaker processes full routing results to report maximum outflow, storage, water surface elevation, and freeboard for multiple design events.

Automatic Design with PondMaker
Enlarge Image

Pond Routing

Pond routing is a mathematical procedure that models a detention pond’s response to a given storm event. By routing a stormwater hydrograph through a pond, engineers can determine how the water surface elevation, outflow, and storage values vary during and after the storm event of interest.

Options include routing a single pond, multiple ponds,interconnected ponds, and variable tailwater conditions. PondPack also allows modeling unlimited diversions by computing flow splits for ponds with multiple outfalls.

 

Pond Routing
Enlarge Image

Pond Sizing and Pond Volume

Pond Sizing

With PondPack, get the grading plan right the first time byautomatically determining storage requirements and pond dimensions using developed pond inflow and target outflow rates. Solve for surface area, depth, or underground pipe size.

Size the pond in two easy steps:

  1. Use PondPack’s sophisticated Storage Estimatorto trim hours off grading plan efforts by estimating storage requirements and pond dimensions before laying out the first pond contour.
  2. Check to see if the pond grading plan meets storage requirements using PondPack’sautomated volume calculation tools for a variety of pond shapes.

Pond Volume

Once PondPack has estimated the size and dimensions of the pond, simply plug in the design data.

PondPack offers several format options for entering pond volume data, providing the flexibility to easily model a wide variety of pond configurations. Volume data formats include elevation versus contour area, elevation versus planimeter area, and elevation versus volume data. Users can even model underground storage by using multiple-barrel circular pipes on grade or entering geometric parameters for trapezoidal basins.

Pond Sizing
Enlarge Image

Outlet Design

PondPack uses the industry-standard Hydraulic Design Series No. 5 methods from the FHWA to automatically perform outlet calculations.

With PondPack, model complex outlets in parallel and series for a variety of tailwater conditions and automatically check for inlet or outlet control. Include weirs, orifices, culverts, risers, inlet boxes, and any user-defined structure in the design. Users can then generate single, multi-stage, or complex rating curves for interconnected pond analysis.

Outlet Design
Enlarge Image

Water Quality Best Management Practices (BMP)

Many reviewers are now requiring additional BMP calculations governing water quality.

PondPack can quickly calculate first-flush volume – the initial portion of the storm that flushes off pollutant particles that have accumulated since the previous rainfall event. Detaining stormwater for longer periods allows more time for particulates to settle out of the system. Test the pond design for minimum drain time performance, or select from a variety of detention time methods, including peak-to-peak, centroid-to-centroid, and weighted average plug flow.

PondPack also addresses water quality issues surrounding infiltration by offering a variety of infiltration options in ponds and reaches.

Water Quality Best Management Practices (BMP)
Enlarge Image

Channel Routing

PondPack provides a variety of options for modeling hydrologically significant channel reaches within a watershed network.

Attenuate flows and account for travel time by routing hydrographs through geometrically shaped channels such as pipes and trapezoidal ditches, or through irregularly shaped natural channel sections. Available channel routing methods include Muskingum,Translation, and Modified Puls.

Channel Routing
Enlarge Image

Interconnected Pond Modeling (ICPM)

In many scenarios, downstream conditions cause backwater effects that influence performance of detention pond outlet structures. A pond may discharge to another pond that is close in elevation, or to a location influenced by downstream tidal effects or flooding. These situations can be extremely difficult to model correctly.

Some approaches simplify the problem through overly conservative assumptions about downstream water surface elevations that can result in oversized facilities and excessive costs. Others ignore the downstream effects entirely, resulting in overtopping of undersized ponds.

With PondPack’s advanced ICPM capabilities, there is no need to compromise the integrity of the solution. Leveraging the technically sound algorithms native to PondPack, users can model these complex scenarios with confidence.

Interconnected Pond Modeling (ICPM)
Enlarge Image

Hydrology

Rainfall data: PondPack can handle an unlimited number of synthetic or real storm events of any duration or distribution. Choose any standard and regionalized methods such as: SCS 24-hour Type I, IA, II, and III rainfall distributions, Bulletin 70 and 71 rainfall distribution data for the Midwest U.S., gauged rainfall data, rainfall curves created from I-D-F data, I-D-F curves, and more.

Infiltration and runoff computations: Choose from the SCS Runoff CN method, Green-Ampt equation, Horton equation, initial and average infiltration rates, user-defined infiltration equations, and more.

Time of concentration calculator: Calculate Tc quickly and accurately, even when there are several possible flow paths to consider. Set up different "what-if" situations for various assumptions to remove the guesswork in finding the most representative Tc, or directly insert a user-defined value.

Peak flow and hydrograph methods: Use the SCS Graphical Peak Discharge method, the rational method, or generate and add an unlimited number of hydrographs throughout the watershed.

Hydrology
Enlarge Image

Reporting and Graphing

Reporting

PondPack's advanced automated report building technology helps quickly and automatically create a complete or summarized easy-to-read drainage report that includes a comprehensive table of contents and an index.

A tree view of all available reports allows users to click items on and off and combine graphs to their reports. These reports can even be opened outside of PondPack.

Create concise executive summaries for paper output, or burn a CD with hundreds of pages of detailed input data, intermediate calculations, and final results. PondPack CD reports provide reviewers with a convenient and searchable read-only archive document.

Graphing

Communicate results effectively by creating scalable color graphics for network diagrams, rainfall curves, flow hydrographs, volume, outlet, and channel rating curves, interconnected pond results, and more. Even compare contributing structures and composite curves all on the same graph.

The graph manager provides a tree view of all available graphs for quick and easy access. 

PondPack's powerful graphing suite also providesautomatic variable interpolation tools to solve for intermediate x or y data points at any specified point on a curve. Export all graphics to a DXF file for import into AutoCAD, MicroStation, or other drafting programs.

Reporting
Enlarge Image