October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 1
PRESENTATION TOPICS • Introduction & Project Overview • Issues and Watershed Management Projects, Programs, and Strategies • Priority Watersheds and Catalyst Projects • Next Steps October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 2
Introduction and Project Overview October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 3
KOʻOLAU LOA 8 Watershed • (2009) Management NORTH SHORE Plans (2016) → O ʻ ahu Water KOʻOLAU POKO Management CENTRAL OʻAHU (2012) Plan (in progress) → Required by WAIʻANAE State Water (2009) Code and ʻEWA mandated by (in progress) County Ordinance PRIMARY URBAN CENTER EAST HONOLULU (in progress) (in progress) October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 4
Overall Management Plan Goal To formulate an en envi vironmentally ly holis listic ic, communit ity-based, and ec economically via viable watershed management plan that will provide a balance between: Sustainable Preservation water use and and management development B A L A N C E of Oʻahu’s to serve present watersheds users and future generations October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 5
Watershed Management Plan Objectives 1. Promote sustainable watersheds 2. Protect and enhance water quality and quantity 3. Protect native Hawaiian rights and traditional and customary practices 4. Facilitate public participation, education, and project implementation 5. Meet future water demands at reasonable costs October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 6
Ahupua ʻ a Approach October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 7
Primary Urban Center (PUC): Three Main Drainage Areas October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 8
PUC WMP Stakeholder Outreach 50+ In-person 4 Series of talk story with 17 Community entities, Neighborhood Meetings (12 organizations, Boards total meetings) and individuals Community Meeting Schedule st Series nd Seri rd Series th Seri 1 st 2 nd 3 rd 4 th ries eries st Qtr (1 st (Ma (May 2017) (March 2018) (Ma (Oct (Oct 2018) (1 tr 2019) 2019) • PUC Watershed • PUC Water Use • PU PUC Watershed • PUC WMP Overview and and Future Projects ts, Public Review Critical Issues Water Programs an and Draft Demands Strategie St ies October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 9
Issues and Concerns Watershed Management Projects, Programs, and Strategies October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 10
PUC-Specific Sub-Objectives, Projects and Programs/Strategies Development COMMUNITY OUTREACH WMP PROJECTS OBJECTIVES WITH “CHAMPIONS” SUB- ISSUES OBJECTIVES PROGRAMS/ STRATEGIES October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 11
Watershed Health Development Climate and Future Change Water Supply Water- Traditional Sea related and Level Customary Issues and Rise Practices Concerns Water Flooding Quantity Water Quality October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 12
• Degraded conditions of some of the forest lands • Impacts of invasive plant species, feral pigs and recreational activities • Reduced rainfall in some areas due Issue: Watershed to climate change Health October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 13
PROJECTS Objective #1: ❑ Native Forest Ecosystem Restoration Issue: Watershed Health Promote ❑ Fencing and Ungulate Control Sustainable ❑ Mānoa Valley Loʻi Restoration, Watersheds Education, and Stewardship ❑ Hoʻoulu ʻĀina Sub-Objective 1.1 Improve the PROGRAMS/STRATEGIES overall health and ❑ Albizia Removal and Reuse water-absorbing ❑ Native Plant Propagation and capacity of PUC Outplanting Program forest lands. ❑ Coordinated Pig Hunting Program ❑ Stream Restoration and Maintenance October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 14
Issue: Native Forest Ecosystem Restoration Watershed Health • 45% of PUC watersheds classified as “non - native” (USGS GIS data) – Oʻahu Invasive Species Committee (OISC) and Koʻolau Mountains Watershed Partnership (KMWP) target specific non- native plant species • BWS funding for watershed management projects: – Authorization to fund 4% of CIP budget (or approximately $3.3 million) a year – FY16-18, about $754k for Koʻoalu specific watershed projects, including to OISC, KMWP, and DOFAW View of Kōnāhuanui Photo credit: Katie Ersbak October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 15
Issue: Impacts of Sea Level Rise on Infrastructure and Development Photos from October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 16 2017 King Tide
Hawaii Sea Level Rise Viewer October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 17
Hawaii Sea Level Rise Viewer October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 18
Hawaii Sea Level Rise Viewer October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 19
NOAA Sea Level Rise Viewer October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 20
Critical infrastructure in the SLR-XA with 3.2 feet of sea level rise Source: Hawaiʿi Sea Level Rise Vulnerability and Adaptation Report (2017) October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 21
Objective #1: Promote Sustainable Watersheds PROJECTS Issue: Sub-Objective 1.2 Impacts of ❑ Execute the Mayor’s City - Adapt to and plan wide Directive on Climate Sea Level for climate change Change and Sea Level Rise Rise on and sea level rise, ❑ City-wide Infrastructure Infrastructure particularly its Resiliency- Integrated and Response to Sea Level impacts on coastal Rise and Flooding due to infrastructure and Development Climate Change people of the PUC. October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 22
Issue: Impacts of Execute the Mayor’s City -wide Sea Level Rise on Directive on Climate Change and Sea Infrastructure and Level Rise Development • Directive issued July 2018 – Responsibilities for implementation – References the Commission’s Guidance and Brief, and State’s Report and Hawaii Sea Level Rise Viewer – Revisions to amend shoreline rules and regulations – SLR targets • Up to 3.2 ft of high tide flooding by mid-century • Up to 6 ft of high tide flooding by 2100, es espec eciall lly for crit critic ical l in infr frastructure with ith lon long g exp xpected lif lifes espans and lo low risk risk tole olerance October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 23
• Polluted runoff • Impacts of urban land uses on nearshore and surface waters, and ground water Issue: Water Quality October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 24
PROJECT CTS ❑ Pearl Harbor Estuary Water Quality Improvement & Ecosystem Restoration Objective #2: ❑ Abandoned Well-Sealing Promote and Enhance Water Issue: Water Quality Program Quality and Quantity ❑ Red Hill Fuel Tanks Rehabilitation Sub-Objective 2.1 ❑ Potable Source Water Reduce polluted urban runoff and to Protection improve the quality of the PUC’s nearshore waters. PR PROGRAMS/STRATEGIES Sub-Objective 2.2 ❑ Stream Restoration and Protect the quality of the PUC's ground Maintenance water resources from urban land uses. ❑ Incorporate Low Impact Development Techniques ❑ Upgrade Cesspools to Septic Systems or Connect to Sewer System October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 25
October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 26
Erosion, Sediment Runoff Cesspool Fertilizer/ Household Hosing Pesticide Chemicals down Fluid leaks dirt/oil From vehicles Disposing dirt/leaves to storm drains Pet Waste Litter October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 27
Erosion, Sediment Runoff Reduce sediment runoff: Forest and Stream Restoration Cesspool Upgrade Fertilizer/ Household Hosing Cesspools Pesticide Chemicals down Fluid leaks dirt/oil From vehicles Disposing Public Education Low Impact Development dirt/leaves to Techniques/ storm drains Stormwater Capture and Reuse Pet Waste Litter Project, Programs and Strategies to Protect Water Quality October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 28
Issue: Flooding • Undersized an and not ot well ll main aintain ined str tream channels ch ls • Threat to heal alth an and sa safety, an and property March 2006: o overflo lowin ing of f Makik iki St Stream duri ring rain in storm October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 29
Objective #2: Promote and Enhance Water PROJECT CTS Quality and Quantity Issue: Flooding ❑ Ala Wai Flood Mitigation Sub-Objective 2.3 ❑ Ala Wai Watershed Restore the function of perennial Collaboration streams of the PUC, including Mānoa Stream and Nu'uanu Stream. Sub-Objective 2.4 PR PROGRAMS/STRATEGIES Use a watershed approach to improve ❑ Stream Restoration and water quality and mitigate major Maintenance flooding of the Ala Wai Canal and its tributaries. October 2018 P RIMARY U RBAN C ENTER W ATERSHED M ANAGEMENT P LAN 30
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