JURNAL REKAYASA

Evaluasi Pencegahan Kebakaran Hutan dan Lahan Gambut Di Kabupaten Ogan Komering Ilir Sumatera Selatan

Herda Sabriyah Dara Kospa — 2023-04-20

Forest and peat land fires in OKI District still occur though local government have tried some efforts to control them. This study aims to evaluate the mitigation efforts that have been carried out by examining the triggering factors for peat fires in OKI Regency and how the existing efforts currently being carried out by related parties. This study was conducted through literature study and field surveys to describe facts and evaluate them based on literature review. This study showed that the causes of forest and peatland fires in this area were mainly due to massive land conversion, unsustainable of land clearing techniques, and also triggered by drought phenomenon. It was necessary to optimize efforts to prevent fires through the development of an early warning system that could reach all stakeholders. In addition, community-based peat restoration programs should be continuously implemented and could reach more areas. Furthermore, increasing corporate responsibility in preventing forest and land fires on concession was pivotal through collaboration with local communities and comprehensive strategies. By establishing communities concerned with forest and land fires, company facilitated them in preventing potential fire hazards, as well as provided education and training in environmentally friendly agricultural techniques.

Analisis Stabilitas Lereng Dengan menggunakan perkuatan Solder Pile

Redho Muktadir — 2023-04-21

West Papua Province is the result of division from Papua Province in 2005. West Papua's natural conditions consist of mountains which cause roads to be in areas prone to landslides. Therefore the author feels the need to analyze the stability of the slopes on the side of the road. In this analysis, the first thing to do is to check whether the existing condition of the slope is stable or not, then do a back analysis to get the design condition parameters. The design parameter is used to determine the reinforcement of the slope. The reinforcement used is solder pile which is used to cut the sliding plane of the slope. Based on the strengthening analysis using a solder pile without disturbing the groundwater level, the safety factor is 2.37 and if there is influence from the groundwater level, the safety factor is 1.3, the safety factor value above shows that the slope is stable with reinforcement using a solder pile.

Pengaruh Kegiatan Konservasi Lahan Pada Kegiatan CSWMDR (Countermeasure for Sediment in Wonogiri Multipurpose DAM Reservoir) Terhadap Laju Erosi Lahan di Daerah Tangkapan Air (DTA) Waduk Wonogiri

Dian Swastika — 2023-04-22

Sedimentation is one of the main problems in the operation and maintenance of the reservoir because it can cause a decrease in the function of the reservoir, as well as in the Wonogiri reservoir which has been operating since 1982. The JICA Study Team in 2007 calculated the annual erosion production on-farm (land) and off-farm (physical buildings) that occurred in all watersheds flowing into the Wonogiri Multipurpose Reservoir amounting to 17,279 million tons per year. The JICA Study Team carried out the community-based watershed conservation physical activities in the context of implementing the Countermeasure for Sediment in Wonogiri Multipurpose Dam Reservoir (CSWMDR) Program, divided into 2 work programs, namely JICA Slice I (in 2015) and JICA Slice II aims to obtain the rate of erosion and erosion reduction with achievements in accordance with the targets set in the Implementation Plan. This study aims to analyze the rate of erosion in the present and future conditions and land erosion reduction in CSWMDR conservation activities to overcome sedimentation in the Wonogiri Reservoir to support the JICA Slice II work program using the USLE method as well as ArcGIS Software assistance and additional tools Spatial Analyst and Model Builder. The results of the analysis show that the total erosion rate in 10 target villages in the present condition is 158,809.21 m3/year, while the total erosion rate in the future condition is 110,354.92 m3/year, and the total erosion rate reduction is 16,268.27 m3/year.