College of Tropical Agriculture and Human Resources
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Hawaii Water Quality Extension Program
nps 319 | oahu watersheds | koolaupoko | project 04-303
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Natural Resources Extension

Project Name: Improving and Maintaining Water Quality in Kawa Stream
ASO Log No.: 04-303
Start/End Date: June 2004 to December 2006
Federal Funds: $199,602.00
Matching Funds: $200,612.00
Contractor: Dr. Wenhao Sun
Marine AgriTech, Inc.
1188 Bishop Street, Ste., 2003
Honolulu, HI 96813
Phone: (808) 523-5517
Fax: (808) 526-9411
Nonpoint source pollution is a serious problem impairing the water quality of Kawa Stream, which flows into and impacts the coastal environment of South Kaneohe Bay, are on the 303d list of impaired waters.
Objectives/Goals: Restore and maintain the water quality of South Kaneohe Bay by improving the water quality of Kawa Stream.
Methods Employed: • Design and construct 57 FPP (floating phytoremediation platforms) units made of ground cover or heavy polyethylene sheet supported by air-inflated plastic pipes and using cultivated akulikuli (Sesuvium portulacastrum)
• Coordinate and work with Castle High School to engage students in the assessment of water quality.
• Conduct 2 public workshops on benefits of phytoremediation.
• Conduct a college-level lecture on phytoremediation.
• Reconnect Kawa Stream with Waikalua Loko to restore the fishpond in the loko kuapa style.
Pollutants of Concern: Nutrients, turbidity, and suspended solids
Watershed: Koolaupoko Watershed, island of Oahu
Size of Project: 3500 feet of Kawa Estuary
Affected Water Bodies: Kawa Stream and South Kaneohe Bay
Deliverables: • Photo documentation of selected portions of Kawa Stream and fishpond
• Water quality monitoring data
• Plant biomass measurement data
• Video called “Clean Hawaii Water: Phytoremediation Works
• Curriculum on ahupuaa concept and fishpond restoration
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Cooperative Extension Service programs, conducted in cooperation with the U. S. Department of Agriculture, are provided to the people of Hawaii without regard to race, sex, age, religion, color, national origin, ancestry, disability, marital status, arrest and court record, sexual orientation, or veteran status. The University is an equal opportunity / affirmative action institution.