Stream flow monitoring golabi
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The document summarizes a study on monitoring stream flow in the Talakhaya watershed on the island of Rota, CNMI following revegetation efforts to reduce sediment loading. The goals were to quantify the reduction in sediment from revegetating with vetiver grass and educate the community. Monitoring equipment was installed to measure rainfall, stream levels, water quality, and discharge. Soil samples were also taken. Preliminary results showed revegetated streams had lower turbidity levels during rainfall events compared to unvegetated streams. Continued monitoring and community education were recommended to further assess the impact of revegetation.
Stream flow monitoring golabi
- 1. STREAM FLOW MONITORING FOR WATERSHED STUDIES FOLLOWING ‘RE-VEGETATION’ FOR REDUCING THE SEDIMENT LOADING ON THE SHORELINES OF MICRONESIAN ISLAND OF ROTA, CNMI Mohammad H. Golabi, Soil Scientist Sydonia Manibusan, Research Associate College of Natural and Applied Sciences University of Guam Presented at the 71st Annual SWCS Louisville, KN
- 2. Where is Rota (CNMI)?
- 4. A bird eye view of Rota
- 5. Some of the beautiful shores of Rota that might be already polluted by sedimentation
- 7. Typical exposed/badland areas at the Talakhaya Watershed in Rota, CNMI
- 8. Rota volcanic area Google Earth image
- 9. Streams/Rivers that drain the Talakhaya Watershed runoff to ocean
- 10. Purpose of the Project Talakhaya watershed was identified as a priority area to improve water quality and reduce sedimentation impacting coral reefs. The study was designed to quantify the reduction in sediment as a result of the re-vegetation efforts occurring in Talakhaya Watershed.
- 11. Some of the management practices: (i.e. Vetiver grass establishment)
- 12. Volunteer workers carrying Vetiver grass seedlings to Talakhaya Watershed
- 14. Areas where Vetiver grass is being planted at the Talakhaya Watershed in Rota
- 16. Volunteer workers carrying Vetiver grass seedlings to Talakhaya Watershed (at break)
- 17. Picture time
- 18. Volunteers at work planting Vetiver grass seedlings _____________________ Vetiver seedlings are mass produced and prepared at the Rota’s DLNR in Rota. Seedlings and equipment are carried manually to the selected areas of the Talakhaya Watershed despite steep slopes and rough terrain leading to the designated sites
- 20. Seedlings are planted one by one
- 21. Talakhaya on-going re-vegetation project (Dr. Golabi helping a Rota DLNR manager with planting of the Vetiver)
- 22. Show Time
- 23. Some of the results from the re-vegetation efforts so far:
- 24. Remember This:
- 28. More Show time: Only 4 months old Vetiver
- 29. What do you think?
- 30. Proud members of the team standing in the areas where Vetiver grass planting is completed
- 31. Victory moments
- 32. Areas where Vetiver grass is planted which in turn has induced improvement with vegetation growth
- 33. Year old Vetiver grass at the Talakhaya Re-vegetation project site: Note: As shown Vetiver works as barrier to sediment loading down to the streams and shorelines, hence protecting the precious coral from siltation.
- 34. Project Goals Year 1 Site assessment of the watershed Obtain permissions and collaborate with community members and local agencies Purchase equipment needed Install equipment Begin sampling/monitoring Year 2 Continue Planting/Monitoring Analyze Data Submission of Final Report Presentation of Findings to the community and resource agencies
- 35. Monitoring Methodology/Tools Hydrologic Data Collection Rainfall Stream Level Water Quality Stream Discharge → → Soil Sampling tools: ↓
- 36. Methodology/Observations Rain Gauge Water Quality Meter Level Logger Flow Meter Analysis of Beach sediment/deposits
- 37. Soil sampling at the Talakhaya re-vegetation site for analysis
- 39. Stream Study Sites Treatment categorization at the Talakhaya Watershed Site _________________________ Unvegetated Project Stream (TK1) Re-vegetated Project Stream (TK2 and TK3) Natural Vegetation Control Stream (TK4)
- 45. Stream Comparison y = ‐3857.4x2 + 706.31x + 43.938 R² = 0.14785 y = 5693x2 ‐ 805.15x + 49.887 R² = 0.17939 y = 233.45x2 + 195.54x + 36.56 R² = 0.11453 y = 2161.5x2 ‐ 114.04x + 35.472 R² = 0.58621 0.0 50.0 100.0 150.0 200.0 250.0 0.0001 0.001 0.01 0.1 1 Turbidity(NTU) Average Rainfall (in) Talakhaya 6‐Hour Average Rainfall vs Turbidity TK4 TK3 TK2 TK1 Poly. (TK4) Poly. (TK3) Poly. (TK2) Poly. (TK1)
- 47. Educational efforts at the local level in Rota
- 48. Educational efforts at the local level (cont’d)
- 49. Recommendations: It appears that re-vegetation to include Vetiver grass has had a positive impact on reducing sedimentation, however: New growth must have time to establish itself More data is required Need for increased community awareness
- 50. More about Vetiver and its effect on Sedimentation Mitigation
- 51. Pago Bay construction site before a big rain Source: Jason Biggs
- 52. Pago Bay construction site after a big rain Source: Jason Biggs
- 54. Growing stage at Pago Bay cont’d
- 55. Since the Vetiver grass is salt tolerance it can also grow very close to sea water and protect the shoreline on the spot (Pago Bay, Guam)
- 56. Cutting at hip height
- 57. Cutting at hip height cont’d
- 58. Our Vetiver grass inventory in UOG research station in Ija (six years after planting)
- 59. We also have fun after we finish our daily work in Rota, etc.
- 62. Flying Residents of Rota
- 63. Rota’s ….bird
- 65. Acknowledgement This project was funded by NOAA's Coral Reef Conservation Program through National Fish and Wildlife Foundation. Dr. Dana Okano from NOAA office in Saipan, CNMI Staff from the DLNR, Forestry Division in Rota. Xerxes Camacho, Research Assistant, Rota Clancy Iyekar, Soil Labs, UOG Our calabash cousins: all WERI and Marine Lab folks and of course the POETers.
- 66. Thank You!
- 67. Questions?