Analysis of Land Cover Changes On Rainwater Runoff In Ciapus Sub-Watershed

Abstract

Ciapus Sub Watershed is part of the Cisadane watershed which passes through 3 (three) sub-districts in Bogor Regency, namely Dramaga District, Ciomas District, and Tamansari District. From 2011 to 2020 housing construction in Dramaga, Ciomas and Tamansari sub-districts increased. High enough rainfall and continuous land changes will result in water infiltration not functioning properly and will cause an increase in surface runoff. Therefore, it is necessary to know how much influence changes in land cover have on the runoff discharge of rainwater in the Ciapus sub-watershed. The purpose of this study was to identify changes in land cover in the Ciapus sub-watershed and to determine the magnitude of the increase in runoff due to changes in land cover in the Ciapus sub-watershed. The results of the analysis of the Ciapus sub-watershed have 8 types of land cover, namely water bodies, primary dry land forest, secondary dry land forest, gardens, dry land agriculture, mixed dry land agriculture, rice fields and settlements. The biggest change in land cover area between 2011 and 2020 is the increase in residential area of ​​2441.59 ha. Meanwhile, dry land agriculture experienced the largest reduction in area of ​​1288.68 ha. Based on the calculation of runoff discharge using the rational method, the amount of discharge that occurred in 2011 was 153.31 mm/second while in 2020 it was 214.99 mm/second

Analysis of Land Cover Change Due to Urban Growth in Central Ternate District, Ternate City using Cellular Automata-Markov Chain

“…Almdhun et al, (2018) argue that one of the important factors that encourage urban growth is urbanization. Urbanization has become one of the main environmental issues lately because it has had a devastating impact on urban ecosystems (Wang & Wang, 2017;Alimuddin, et al, 2022) Geographically, the location of The Central Ternate District which is in the center of Ternate City and is also the City Area Section (BWK) II which makes this district the most populous district and is the destination of urbanization in North Maluku Province. Based on data from BPS Ternate City in 2021, Ternate Tengah District is one of the districts that has the highest population growth rate in Ternate City with a total population in 2021 reaching 53,643 people (BPS, 2021).…”

Spatial Dynamics of Land Cover Change in Ternate Tengah District, Ternate City, Indonesia

“…Urbanization is an essential factor that encourages urban growth (Almdhun et al, 2018). This phenomenon has also become one of the main environmental issues lately because it has devastated urban ecosystems (Wang & Wang, 2017;Alimuddin et al, 2022). Based on previous research conducted by Umanailo et al (2017), two factors are considered to affect changes in land cover in Central Ternate District greatly: population and economic factors.…”