Analysis of Sea Surface Dynamics during the Coastal Floods in Manado

Coastal flooding is one of the serious problems facing most coastal areas in world. On January 17 and December 7, 2021, hit area Manado, North Sulawesi, Indonesia. The disaster disrupted economic activities on coast Manado Bay. This study analyzed dynamics atmosphere sea during flood events using water level data from Geospatial Information Agency, which was then filtered to separate residual atmospheric tide, oceanographic reanalysis Wavewatch-III BMKG Ocean Forecast System (OFS). results show that coincided with occurrence maximum tide. shows a significant value around 0.2 – 0.3 m, indicating influence phenomena rise. According oceanographical data, local wind main factor occurrence, shown by speed increased wave height significantly 1,5 m 17, 2,0 Bay coast. Another might contribute event Manado's land morphology. Further must be conducted discover morphology floods.
 Keywords: flood; Water level; Tide
 
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