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Hydromodification - Causes, Effects, and Mitigation

As professionals in erosion and sediment control we are often focused on on-site erosion and sediment controls. When considering changes in runoff rates and volumes, however, it is essential to look downstream of the site to understand how changes in hydrology may adversely affect downstream receiving waters from the standpoints of degradation, aggradation, and aquatic habitat. This presentation will focus on the causes and effects of hydromodification, the roles of peak flow rates and runoff/streamflow volume, and the fundamentals of mitigating these effects. The presentation will provide examples of strategies to mitigate impacts of hydromodofication including the importance of stormwater volume reduction, control of frequently occurring events that form channels, and bed and bank stabilization.
Member Price:
$50.00
Nonmember Price:
$65.00
Available for Immediate Download
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IECA Annual Conference and Expo 2019 - Attendee Registration

http://www.ieca.org/images/Events/2019_AnnualConferenceHeader_2550x675.jpg
Description: IECA's annual premier educational event for the erosion, sediment control and stormwater industry.The IECA Annual Conference and Expo combines intense, full and half day training courses with topic-focused technical sessions and the largest expo of its kind.
Start Date:
Tuesday, February 19, 2019
End Date:
Friday, February 22, 2019
Location:
Colorado Convention Center
700 14th St
Denver, CO 80202
UNITED STATES


Implementing a SWPPP - Easy, right?

The design is complete, the permits have been obtained, and contracts are in place for contractors. It's time to get construction started! What could possibly go wrong? A SWPPP, stormwater pollution prevention plan, is a best guess about how the construction site will begin, progress and finish based upon the information that the design has before construction. However, it is rare that construction progresses as the designer envisioned. When implementing a SWPPP, expect to encounter the following: - The contractor will have a different - and possibly better - way of grading the site, along with a different construction sequence. - The unforeseen will be uncovered and it will impact the construction schedule. - Not all parties on the construction site will agree on E&SC or stormwater management for the site. When implementing the SWPPP, the inspector/site manager must adapt to these issues while still meeting the intent of all permits. SWPPP modifications. There is no perfect SWPPP. All SWPPPs will need revision and modification during construction. Some states do not require that plans be resubmitted when modifications are required. Other states do require plan submittal and approval. Know your state's requirements - and any professional requirements. In most states, professional engineers are the only people licensed to design pipes and embankments (think sediment basins and culverts). The SWPPP must reflect what's on the ground and vice versa. For example, when silt fence or check dams are removed when they are no longer needed, the SWPPP should be modified to show that these measures have been removed. Inspection documentation should also indicate that the measures have been removed and why they were removed. Together, the modified SWPPP and inspection documentation should clearly tell the story of the site conditions at the time of the inspections. Take photos of the site as well to confirm site conditions. Documentation. As the SWPPP is revised or modified, document the changes on the SWPPP sheets, in inspection reports and with photos. Documentation is critical to show compliance. The construction general permit allows time for a contractor/developer to respond to problems found on a construction site, and if the problems are resolved within that timeframe, the site is in compliance. Note that some states have additional regulations governing construction sites and off-site sedimentation can be considered a violation of the regulation, regardless of storm size. Besides SWPPP modification and inspection reports, a site manager/inspector must also keep good documentation of rain events. The Construction General Permit requires that measures be designed for the 2yr, 24hr rain event. To determine the return interval for each storm, document the time a storm started and ended and the depth of rain. That information can be compared to rainfall information provided on NOAA's Atlas 14 Point Precipitation Frequency Estimates website (https://hdsc.nws.noaa.gov/hdsc/pfds/pfds_map_cont.html) to determine the storm's return interval. Site managers/inspectors should use the rainfall data to make decisions about the failed measures. If measures failed in a storm that exceeded the 2 year storm equivalent intensity, the measures were adequate and should be reinstalled. If measures failed in a storm that was less than or equal to the 2 year storm event, the measures should be upgraded. can be compared to the rain fall information on NOAA's Atlas 13 site to determine the equivalent intensity storm. As a final good practice on a construction site, provide feedback to the designer about the site: what worked well, what didn't work well. If that information is not conveyed to the designer, the same issues may occur on other construction sites.
Member Price:
$90.00
Nonmember Price:
$120.00
Available for Immediate Download
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Introduction to Low Impact Development

This course has been developed to introduce participants to the concept of Low Impact Development (LID). It is intended for developers, consultants, municipal staff, landowners or anyone looking to gain a general knowledge of sustainable stormwater planning and practices. The course is comprised of four modules, the first discusses the evolution of stormwater management and the progression to LID. The next module introduces the principles of LID and non-structural site design strategies. Eleven LID practices are examined, providing general descriptions, special considerations and an overview of typical stormwater performance expectations in the third module. The final module explores the financial benefits of LID and introduces useful guides and tools that can be used to determine the costs of an LID project.
Member Price:
$40.00
Nonmember Price:
$50.00
Available for Immediate Download
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Lessons in LID Construction

Low Impact Development (LID), an innovative stormwater management approach that treats, infiltrates, filters, and retains runoff at the source, is quickly becoming the new norm in Ontario. Construction of LID practices involves techniques and specifications that differ from traditional stormwater management construction practices. Failing to follow proper LID construction methods can result in barren bioretention landscapes, clogged infiltration practices, uneven permeable pavements, and ultimately costly post-construction repairs.
Member Price:
$50.00
Nonmember Price:
$65.00
Available for Immediate Download
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Low Impact Development (LID) Design & Implementation

The Low Impact Development (LID) Design & Implementation Course Package offers you a discount of training for those seeking design and implementation training on Low Impact Development (LID). This package includes access to: Lessons in LID Construction Construction Site Erosion and Sediment Control: Best Practices and Low Impact Solutions Changing the Development Paradigm to Embrace LID - Part One & Part Two Stormwater Low Impact Development Practices • Part One & Part Two Designing LID Systems: What do you need to know and why Continuing education credit for this package is 0.7 CEU (7 PDH) Credit. Course Level: Basic - Intermediate
Member Price:
$250.00
Nonmember Price:
$300.00
Available for Immediate Download
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Maintenance of Permanent Best Management Practices (BMPs)

As more permanent stormwater best management practices (BMPs) are being installed across the nation, performing ongoing maintenance has been a challenge. Permanent stormwater BMPs are now required in most urban developments across the country and it is crucial that these BMPs be maintained correctly. All permanent stormwater BMPs require regular maintenance to remain operating as designed. Maintenance has been neglected in the past due to a failure to understand who is responsible for maintenance, failure to budget for maintenance, and from a lack of knowledge on appropriate maintenance practices. In this webinar, we teach participants to recognize permanent stormwater BMPs in the field, identify maintenance needs and activities, and to perform maintenance correctly. This webinar will provide attendees a broad introduction to the needs and application of permanent stormwater BMP maintenance.
Member Price:
$50.00
Nonmember Price:
$65.00
Available for Immediate Download
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Permeable Pavement Design and Construction

Stormwater drainage technology has evolved to the point where it is now possible to create permeable pavements that allow stormwater drainage to occur almost immediately. The benefits to permeable pavements include having rainwater drain directly into soil, decreasing urban heating, and reducing overall stormwater runoff. This concept is gaining acceptance through studies conducted in the United States, the United Kingdom, and Australia. This webinar focuses on what constitutes permeable pavement, design tools and methodologies in designing permeable pavement, the structural and hydrological capacities, and design traffic characterization.
Member Price:
$50.00
Nonmember Price:
$65.00
Available for Immediate Download
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Polymers for Construction Site Erosion and Sediment Control

This course has been developed to familiarize participants with the concepts of polymers and how they can be used for Erosion and Sediment Control (ESC) on construction sites. The course is intended for developers, consultants, municipalities, landowners or anyone looking to learn about polymers and apply them for ESC. This course consists of six modules that discuss the basic concepts of polymers, soil stabilization with anionic polyacrylamide (PAM), PAM based stormwater clarification applications, additional PAM enhanced sediment controls, PAM assisted pond dredging, and anionic PAM application guidance for urban construction.
Member Price:
$75.00
Nonmember Price:
$100.00
Available for Immediate Download
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