SIMULASI PENERAPAN KONSEP NATURE BASED SOLUTIONS SEBAGAI UPAYA DALAM MENINGKATKAN KAPASITAS LAHAN DALAM MENYERAP AIR: SUATU PENDEKATAN SYSTEM DYNAMICS ( STUDI KASUS : SUB – DAS CITEPUS, KOTA BANDUNG)

• Main Author: Hafiz, Riandzaki
• Format: Final Project
• Language: Indonesia
• Subjects: Perencanaan wilayah
• Online Access: https://digilib.itb.ac.id/gdl/view/49148
• Institution: Institut Teknologi Bandung

Urban development is a process of increased urban activities along with an increase of amount of space and land to accommodate it, which demanding changes in land uses. Land is a limited source but the people's demand to use it is keep increasing (for living, etc). Therefore, demographic is the main pressure that drives changes in land uses. The increase in population is closely related to the increase in demand for land which can lead to conversion of agricultural/forest lands to non-agricultural so that it has an impact on ecological changes that lead to environmental degradation and the closure of the water catchment area with built up areas (impervious areas) such as roads, buildings, and parking areas that causing infiltration capacity drop dramatically. The low infiltration capacity increases the frequency and intensity of flood. Therefore, this study aiming to identify how changes in land cover transitions over time that caused a decrease capacity of land to absorb water in sub-Citepus watershed, which is shown in the form of an index, with historical data for 2009-2019 and projected until 2039. This study also aim to simulate how the nature-based solutions can play a role in increasing the capacity of land to absorb water over time. Based on the results, there is a decrease of land capacity index in order to absorb water every year, with an index scale of 0-1 divided into 5 categories (very bad, bad, moderate, good and very good). In 2009, the land capacity index for absorbing water in the sub-Citepus watershed is 0.57 (medium) and decreasing to 0.31 (bad) in 2039. This phenomenon is caused by urbanizations which has led to the growth of changes in green land cover to residential land. After the land capacity index has been identified, this study tries to simulate the concept of nature based solutions to increase the land capacity index, the result is that in the final simulation year, the index increase from 0.12 to 0.43 (moderate). With the knowledge of these conditions, there is a need to restore green land that has changed to residential land. By applying the concept of nature based solutions, it can help to increase the capacity of the land to absorb water and provide various additional benefits for the sub-Citepus watershed ecosystem.