Private residential development (including conversion of public facilities to private) Perpendicular and lateral shoreline access. (a) In various places around the state private roadway access to shoreline area is being blocked by gates, fences, signs or other barriers;
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Private residential development (including conversion of public facilities to private) Perpendicular and lateral shoreline access. (b) Human-induced vegetations that impacts lateral beach access is a statewide problem. There have been community complaints about the vegetative encroachment induced by private property owners at Kahala, Diamond Head and Kailua beaches, Oahu; Ha'ena, Wainiha and Hanalei, Kauai and other areas around the State.
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Non-water dependent commercial/industrial uses of the waterfront (existing or conversion) Perpendicular and lateral shoreline access. The special management area (SMA) permit of the statutory law encourages non-water dependent uses of waterfront to locate in inland area. Public involvement to a large extent prevents non-water dependent commercial/industrial uses of the waterfront.
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Erosion. Lateral shoreline access. Approximately 2% of Hawaii's shoreline is critically eroding (Coastal Management 27:187-217). Some shoreline areas are experiencing significant beach erosion and shoreline retreat. For example, 70% of Kauai's beaches are eroding while Oahu has lost a quarter of its sandy shoreline.
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Sea level rise/Great Lake level change. Lateral shoreline access. The beaches become narrow during the high tides. This phenomenon particularly occurs in hotel areas including Waikiki, Oahu. Scientists haven't yet observed an accelerated rate of sea level rise in Hawaii.
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Natural disasters. Lateral shoreline access. The potential of coastal disasters such as tsunami and storm surges is high and therefore beaches could shrink or be lost.
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National security. Perpendicular and lateral shoreline access. There have been no major increased impacts from national security on public access since last assessment.
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Encroachment on public land. Lateral shoreline access. The biggest encroachment onto public land in Hawaii is human-induced vegetative encroachment on the lands seaward of shoreline.
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Other. Perpendicular and lateral shoreline access. Beach access closures or warning due to (1) water quality concerns; (2) high surfs; and (3) appearance of jelly fish or sharks.
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