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Wai‘ula‘ula Watershed Plan Background Watershed condition Status of plan.

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Presentation on theme: "Wai‘ula‘ula Watershed Plan Background Watershed condition Status of plan."— Presentation transcript:

1 Wai‘ula‘ula Watershed Plan Background Watershed condition Status of plan

2 Wai‘ula‘ula watershed

3 headwaters Intermittent flow in middle and lower reaches groundwater seep

4 Current and future land use

5 Background on watershed plan.... focus on nonpoint pollutants prerequisite for EPA funding of BMPs MKSWCD lead agency Carolyn Stewart lead writer

6 Phase 1 of Watershed Management plan Describe watershed and threats to water quality stream water quality monitored with autosamplers and urban grab samples Potential BMPs identified

7 identified impairments Waikoloa Stream below Waimea Town –TN and TP Wai‘ula‘ula stream just above ocean –TN adjacent Pelekane stream –TSS, TN, TP 2 orders of magnitude above standard nearshore marine waters –ammonia and algae Of concern but not measured –pools in intermittent sections of stream –losses due to streambed infiltration

8 Potential sediment and nutrient sources forest urban and suburban Waimea –Stormwater runoff –septic tanks Lalamilo farm lots grasslands and scrublands –fire –overgrazing –feral ungulates Coastal resort

9 Stream after a fire (excessive sedimentation)

10 Potential sediment and nutrient sources forest urban and suburban Waimea –Stormwater runoff –septic/cesspools tanks Lalamilo farm lots grasslands and scrublands –fire –overgrazing –feral ungulates Coastal resort

11  Original Plan did not meet EPA 9 elements Without the 9 elements there is no EPA 319 funding Need a rationale for selection of BMPs Currently re-writing plan to meet requirements

12 EPA 9 elements: What must be done prior to applying for funding Identify causes and sources of nonpoint pollutants (data limited) Quantify load reductions expected for selected BMPs (methodology not mature – using N- SPECT model) Have monitoring plan to evaluate if project is successful

13 N-SPECT model can (?) evaluate sources and pollutant loads with/without BMPs

14 Priority BMPs identified in draft plan conservation plans for farms improved fire management improved grazing management riparian zone and post-burn restoration

15 Proposed administrative BMPs identified in draft plan institute overlay district that explicity protects riparian areas Low Impact Development Outreach Obtain cesspool information

16 Current status


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