The Diminishing Green Land in the Buffer City Area of Jakarta

Abstract

Jakarta got its water from Mt. Salak in Bogor, land it is not directly adjacent. From Mt. Salak to Jakarta, the water has to pass a few other regencies like Bogor, Depok, and South Tangerang. That means whatever changes happen in those areas will affect how the water reaches Jakarta. Therefore, a system is needed to track how the land changes in those areas, and one of them is through satellite images, Landsat 8. The images taken will give a rough visual of the land, but as data, it has to be in numbers. A method called Gradient Boosting Regression helped with that. This method can build a model that classifies every pixel of the images and, in this research, green, partial green, and impervious. This model has an accuracy of 99.3349% for the training data and 99.1658% for the validation data and took 13.91376 seconds to complete. From this model, there is a trend where the green area keeps decreasing through the years, and the district with the highest area of land-use change from green to impervious is Sukamakmur in Bogor.