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One of many cases of abrasion problemsin the coastal areais Toseho Village in South Oba subdistrict, North Maluku province. About thirty years ago, village residents have to evacuate to high land area due to abrasion damage that is caused by natural disaster of big waves from the pacific ocean. The abrasion progress is also triggered by deposit subsoil. By those problems, several families are still survived to stay because of living as fishermen, it is about 15 families. However, they do not have any construction to safeliving under attacking natural disasters. Therefore, this study is proposed a design method using empirical way to design a dike for countering the natural disaster in recovery area land. The tidal waves investigated by using Global Positioning System (GPS) and subsoil properties observed by practically way along the coastline of residential. The coastal dike has to design by considering stability criteria such as bearing capacity and factor of safety, which are conducted by several empirical equations. Finally, the results of field investigation for cross section about 30 meters on perpendicular direction to the coastline for along 483 meters are obtained different ground level average 2.0 meters at the coordinate of 0°20’57,91″U and 127°39’17,30″T. The subsoil identified as silty and sands materials at the ground surface, which is parameterof loose density. The simulation results of empirical way are obtained ultimate bearing capacity of the subsoil  q u of 31.2 t/m 2 , factor of safety for overturning  Fs1  of 3.5 and factor of safety for sliding  Fs2  of 1.8. Then, factor of safety for bearing capacity of subgrade  Fs3  of 0.63, which is loaded by pressure at beneath the dike  p  of 49.74 t/m 2 .

Designed Coastal Dike to Counter Natural Disaster of Big Waves at Toseho Village