Coastline Response to Groins Analysis

Syawaluddin Hutahaean

groin, stable coastline, crenulate shaped bay.

This research investigates the morphological response of coastlines to the construction of groins, focusing on both single groins and paired groins. The evolution of the coastline is analyzed with the aim of identifying a new stable coastline geometry. The approach involves modeling the stable coastline using polynomial functions, where the polynomial coefficients are determined through the application of point-specific and line-specific characteristics, as well as the principle of mass conservation. The resulting stable coastline configuration typically forms a crenulate-shaped bay an equilibrium shoreline geometry occurring between two headlands. The derived geometry, whether partial or complete, exhibits features consistent with the known characteristics and dimensions of a crenulate-shaped bay.The modeled stable coastline can be calibrated against empirical crenulate bay profiles, confirming its validity as a representation of an actual stable coastal form.

Received: 19 Mar 2025, Receive in revised form: 21 Apr 2025, Accepted: 26 Apr 2025, Available online: 30 Apr 2025

10.22161/ijaers.124.9