. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 115 Milaidhoo (Figure 6). Comparison of GPS surveys indicates that tsunami-induced erosion reduced the vegetated area of Milaidhoo by an estimated Most erosion occurred along the northern shoreline with surveyed cross-sections indicating erosion of up to 4 m (Fig. 6 b). Overwash sedimentation on the vegetated island surface was not common in this area, but was concentrated in the southern half of the island on both eastern and western surfaces. The southeastern overwash sheet was up to m thick and it
. Atoll research bulletin. Coral reefs and islands; Marine biology; Marine sciences. 115 Milaidhoo (Figure 6). Comparison of GPS surveys indicates that tsunami-induced erosion reduced the vegetated area of Milaidhoo by an estimated Most erosion occurred along the northern shoreline with surveyed cross-sections indicating erosion of up to 4 m (Fig. 6 b). Overwash sedimentation on the vegetated island surface was not common in this area, but was concentrated in the southern half of the island on both eastern and western surfaces. The southeastern overwash sheet was up to m thick and it appeared that these sediments originated from the broad sandy beach and berm along the eastern side of the island which had been deposited towards the end of the westerly monsoon season. Further details of the morphostratigraphy and sediments of the tsunami deposits on Milaidhoo are presented later in the section on depositional signatures. Similar to other eastern islands, the base of the beach was located landward of its pre-tsunami position on the northwestern, northern and southeastern sides of the island (Fig 5 a, b, e) but had expanded as a broad, recurved spit across the reef surface on the southern side of the island occupying a further 3,500 m2of reef 50 Distance (m) 20 40 60 80 Distance (m) Vegetated island I Eroded island Overwash deposition Survey benchmark Toe of beach - Jan 02 & Feb 03 — — Toe of beach June 02 " Toe of beach & J Tsunami-induced scarping survey profile Feb 05 /f Tsunami-induced gullying Figure 6. Pre- and post-tsunami plan and profile changes on Milaidhoo Island. Location of island shown in Figure Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Smithsonian Institution. Press; National Research Council (U. S. ). Pacific Science Board; Smithsonian Inst
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