Where:HDR's Bellevue Office, 500 108th Ave NE, Suite 1200 (Map)
Logistics: No registration is necessary. Bring your own lunch and contact firstname.lastname@example.org with questions.
Title: The Borehole Permeameter Approach for Stormwater Infiltration Testing
Speaker: Scott Kindred, Kindred Hydro
Bio: Scott Kindred, P.E., is the president of Kindred Hydro, Inc., a hydrogeologic consulting firm specializing in stormwater infiltration. Scott teams with civil engineering firms designing green stormwater infrastructure solutions for municipalities and private developers. In recent years, he has developed cost-effective infiltration testing methods for dense urban neighborhoods. With expertise in hydrogeology, contaminant fate and transport, geotechnical engineering, and civil stormwater design, Scott provides a unique multidisciplinary perspective in addressing the range of issues associated with stormwater infiltration. He is a registered professional engineer and hydrogeologist with over 25 years of consulting experience.
Abstract: The 2014 Western Washington Stormwater Manual recommends the use of the Pilot Infiltration Test (PIT) for estimating infiltration rates to be used in design of Green Stormwater Infrastructure (GSI) facilities. Unfortunately, the PIT approach ignores important physical processes and overestimates the infiltration rate by up to 50 percent. Although the non-conservative nature of this approach is partially mitigated as the size of the test excavation increases, the cost and logistical challenges (e.g., sufficient water supply) can become prohibitive.
This presentation provides an alternative approach, the borehole permeameter (BP) method (also referred to as the constant head well permeameter approach), that is well suited for estimating infiltration rates for use in design of green stormwater infrastructure (GSI). The BP approach has been used in excavated test pits (similar to the PIT approach), shallow boreholes excavated using a vactor truck, and deeper drilled boreholes completed within the unsaturated zone. Under ideal conditions, the BP procedure involves adding water to the borehole at a steady rate and monitoring the head rise until it achieves steady state. The test results provide estimates of bulk hydraulic conductivity (K) using simple analytical solutions that were originally developed in the 1950's and have been refined in recent decades. Bulk K is a composite parameter that incorporates both fine-scale layering and larger-scale soil variability within the tested interval.
In recent years, the BP approach has been tested and refined during numerous stormwater infiltration assessments and examples of the approach will be provided. These examples will illustrate the following:
- Cost effective approaches for estimating bulk K for use in designing stormwater infiltration systems for both new development and retrofit projects,
- Using the BP approach for estimating the capacity of excavated and drilled infiltration drains (drywells or underground injection control wells),
- Range of bulk K for advance outwash soils within several Seattle, WA neighborhoods.
Fundamental of Building Science Course RSVP
Course Description:The FEMA Building Science Branch has developed numerous training courses and workshops to provide information to communities and homeowners on how to build stronger and minimize damage from natural disasters. This course provides an overview of technical guidance on basic scientific and engineering concepts for hazard-resistant buildings and the course will be targeted to the hazards and construction type found in this region.
Target Audience:Engineers and Architects whose work assignments require disaster-resistant building science knowledge.
For more information and instructions on how to apply, please contact Regional Earthquake Program Manager, Gala Gulacsik, at email@example.com or at (425) 487-4573.
Volunteer NeedsASCE Seattle Section is searching for candidates to fill the role of chairperson of the Legislative Committee. The new State Advocacy Captain is Dr. Conrad Felice.
Candidates for volunteer positions at the local level should have the following qualities and be willing to perform the duties described.
- Be a leader in the engineering profession and have sound understanding of all aspects of the engineering profession.
- Understanding of the legislative process and can follow the bills and other initiatives that move across Washington State
- Communicate frequently and work with the Architects and Engineers Legislative Council to influence our elected leaders regarding the issues ASCE and today's engineers are facing
- Educate and communicate current legislative issues with the ASCE Seattle membership
- Educate local and state elected officials on important engineering issues
- Work with key Washington funding groups and programs to support legislation that is vital to the engineering profession
- Work with a volunteer committee of engineers to organize events regarding key local legislative issues.
- Participate in National Level training and fly to Washington DC to participate in a political process where you can share with members of congress your engineering perspective on structures, transportation, water resources, energy, to name a few to help influence program legislation. (Funding for travel, training and accommodations provided to selected volunteers.)
Below is a description of the work that the Legislative Committee participates in.
The Legislative Committee functions in the political arena. The committee can become active in federal, state, county or other governmental issues that are of interest to the profession (such as university engineering budget considerations, issues that affect the practice of or employment of civil engineers, and environmental issues of significance to the profession). The committee is responsible for disseminating information from the AELC pertaining to state legislation. In recent years, the chair of the Legislative Committee has also been the AELC representative. If they are different, the Legislative Committee chair is an alternate to the AELC and shall be responsible for keeping abreast of current activities of the AELC.
The committee reviews proposed legislation and comments on it with regards to its effect on the civil engineering profession. The committee may request the Board take an official stance on certain legislation that is being proposed as appropriate. The committee and its members may also be called upon to testify at Legislative hearings or for other governmental committees (it must be noted that if such testimony is not previously approved by the Board or general membership, such testimony cannot represent the official position of the Seattle Section and is as an individual). The committee should work toward establishing a key contact group of members of the Society who have contacts with elected officials and who would be available to communicate the position of the Section. The committee is generally active prior to and during the sessions of the state legislature. The committee at times seeks the advice of other Section committees that may be more versed on a particular legislation topic. The committee typically sends at least one representative to the Society's annual Legislative Fly-In in Washington D.C.
Support the Seattle ASCE Section by attending an ASCE Webinar.
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