2013 NGWA Summit — The National and International Conference on Groundwater

Groundwater Dewatering and Control in Sensitive Environments

Monday, April 29, 2013: 8:40 a.m.-10:00 a.m.
Regency East 1 (Hyatt Regency San Antonio)
Construction dewatering or water control are common terms used to describe removal or draining groundwater or surface water from a riverbed, construction site, caisson, or mine shaft by pumping or evaporation. This frequently involves the use of submersible dewatering pumps, centrifugal pumps, sump pumps, or application of vacuum to well points. When a dewatering site is located adjacent to environmentally or structurally sensitive features such as wetlands, surface water bodies, contaminated sites, or earthen dams, special considerations must be made in the design of a successful dewatering scheme. In addition, the long-term dewatering needs of such a site may be different given its proximity to the sensitive feature. This session showcases the innovative approaches practitioners have used to address groundwater dewatering near sensitive areas and lessons learned from successful applications.
Moderator:
Bill Fernandez, PE
Water Resources, CDM Smith, Walnut Creek, CA

8:40 a.m.
Sinkhole Hazard Assessment Based on Real-Time Monitoring of Karst Water Pressure in Guangzhou, China

Yongli Gao, University of Texas at San Antonio
Mingtang Lei, Institute of Karst Geology
9:20 a.m.
Mitigation of Groundwater Dewatering Impact on a Nearby Contaminant Plume During Pipeline Construction

Bill Fernandez, PE, CDM Smith
John P. Nyznyk, PE, BCEE, LEEDAP, CDM Smith
Robert P. Schreiber, PE, BCEE, D.WRE, CDM Smith
9:40 a.m.
Groundwater Modeling to Assist in Designing a Dewatering System for the Protection of Egyptian Antiquities

Buvana Ramaswamy, PG, CDM Smith
Robert Fitzgerald, PE, CDM Smith
Henning Moe, CDM Smith
Thomas Nichols, PE, CDM Smith