Abstract
The accelerated development of Palu City and its vicinity areas surrounding Palu Bay has changed the land use especially in the coastal area. These changes may reduce the function of the beach as a natural bathing wave. The 2018 Palu Bay tsunami have varying heights. This height variation is probably because of the difference in both geographical and geological conditions in coastal areas which are located surrounding the bay. The research used the contingency coefficient as a method for determining the magnitude of the correlation between tsunami heights and several parameters, such as: land cover, slope, and lithology. The results show the land cover parameter has the most effect the height of the tsunami wave recorded. Based on the significance test using the Chi-Square, the slope of the coastal area is the most representative parameter with a 66% confidence level.
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