Abstract:
The beach in Bo Young subdistrict, Songkhla province (Samila beach Chalatal beach) about 7.05 km far,
are going to face with beach erosion. So we made a study about the changing of coast for 12 months since
January to December 2020 by recording the data of the coast with an equipment called GPS. We recorded
them twice a month and consider them with a program named Quantum GIS 3.4. We use it (the program) to
calculate the beach area and build the beach area. After that we compare it with an area of the beach (the
photos came from the translation of aerial photo) in 2553 BE. And then we could know that the beach in 2020
has an area about 1,382,812.08 m2 and the beach in 2020 lean to decrease according to a straight line equation.
It let us know that the area of the beach is equal to = (-130.91) (amount of month) - 1,377,997.00 m2 or it
means the ratio of the beach erosion equal to about -130.91 m2 per month but has more space than the
beach in 2010 about 125,874.46 m2 from the previous equation, so we can say that the of an erosion at
Chalatat beach has more than the of a deposition at Samila beach.