1. Stream and sediment monitoring
Background
Current status
Preliminary results

2. Rationale
Provide information on the flow and suspended sediment concentration in Wailupe and Kuli‘ou‘ou streams
Used for flood control and stream habitat design in Wailupe Stream
Used to measure suspended sediment from land to coastal waters and reef
Data applicable to all streams flowing into Maunalua Bay

3. Scope of Work Funding from US Army Corps of Engineers
Continuous measurement of flow & sediment in Wailupe and Kuli‘ou‘ou Streams
Site selection and permits
Gage construction
Gage operation
Periodic measurement of flow at selected locations in Wailupe Stream
Above debris basin, several times per year
Two sets of concurrent measurements at other locations (Seepage Run)
Funding from US Army Corps of Engineers

4. Status
Wailupe
Gage operational since Oct. 2008
Measurements at mauka debris basin
Seepage runs completed in Feb & July 2008
Final permit to construct Kuli‘ou‘ou gage received March ; installation planned for May

5. ft3/s
Debris basin
(1 gpm)
Gage
Not measured
Not measured
Seepage Runs

6. Debris basin

7. Flow at debris basin 9 measurements (Feb 08 to Jan 09)
Range from 0.4 cfs to dry
Median = cfs (~½ gal. per minute)
Flow at debris basin

8. Stream gage

9. Real-time data at hi.water.usgs.gov

10. 29.3 cfs
1 cfs = 450 gpm

11. 102 cfs

12. Streamflow
(230 cfs)
cfs

13. Flow Duration
cfs
No flow ~ 75% of the time

14. Annual Peak Flow
cfs
230 cfs

15. Streamflow & Sediment
cfs
mg/l

16. Coming to Kuliouou: May 2009

17. And then what ??
Measurements of flow will be used by COE to design flood control and aquatic habitat projects
Sediment load information helps understand coastal impacts and are a benchmark the effectiveness of watershed restoration