Floods are recurring disasters in urban areas, particularly in flood-prone regions, such as Makassar City, Indonesia. The preparation of residents for such events is crucial for reducing risks and enhancing resilience. This study aims to analyze the relationship between Quality of Life (QoL), as measured by the World Health Organization Quality of Life-BREF (WHOQOL-BREF), and disaster preparedness in flood-prone areas of Makassar City. A combination of conventional statistical methods and Structural Equation Modeling- Partial Least Squares (SEM-PLS) was used to analyze the data collected from 409 respondents across four sub-districts: Biringkanaya, Tamalanrea, Panakkukang, and Manggala. The findings indicate that a higher QoL correlates with improved disaster preparedness, suggesting that efforts to enhance residents' well-being can positively influence their readiness for floods. Based on these results, this study proposes integrating QoL factors into disaster preparedness programs to increase community resilience.

The sedimentation occurring in the outer Ambon bay as a result of the effluent from Way Ruhu river causes the reduction the mouth of the outer Ambon Bay, so that it influences the current movement pattern and sediment distribution. This research aimed at analyzing the current movement pattern and sediment distribution pattern in the outer Ambon bay using two scenarios: with the reclamation and without reclamation. The research used the numerical model of MIKE 21DHI with modules of the hydrodynamic and mud transport. The research result indicates that the simulation current velocity with the absence of reclamation ranged from 0.0-0.4 m/s, while with the presence of the reclamation, the current velocity is slightly higher that is between 0.0 - 0.6 m/s the various velocity patterns. The sediment distribution pattern in the outer Ambon bay as the result of the effluent from the way Ruhu river follows the current movement. If the conditions leading to the tide and the highest tide, the sediment going out from way Ruhu river is pushed into the bay and vice versa, when the condition leading to the recede and lowest recede, the sediment concentration is pulled out from the bay. The suspended sediment concentration is between 0.002 kg/m3 - 0.030 kg/m3 with the various patterns. The suspended sediment concentration to the condition without reclamation is more collecting if compared with the suspended sediment concentration by the presence of the distributing reclamation because of current velocity effect.

Many parameters can be influenced by speed flow, like form resistance and speed flow. Form obstacles influence structure turbulent flowing water, so that can raise potency change speed and pattern flow around the structure building. This study considers the tilted corner prisoner structure triangle and incoming water flow to influence the pattern and speed flow that occur after the genre through the obstacle triangle using IRic simulation. IRIC is a simulation platform that supports numeric and various breaker computing problems in water science and engineering. The variations of the corner prisoner plate triangle used in this study are 30°, 45°, and 60°. The transverse channel is blocked with a ratio of β = 1/10, and upstream-downstream boundary conditions are open. Results show what will happen in the genre critical moment pass structure. Because the change is significant, Froude's number. Observations that took place showed that speed flow on each slope was stable before the pass structure and was not stable after the pass structure. Whirlpools occur on a45° slope, so the speed flow that occurs will increase significantly. On an incline of60°, it will have the largest Froude number, which is caused by the depth (D)created by the 60°angle being higher in comparison with another slope. For an incline of30°, show speed, more flow, and a constant flow with a bigger Froude number. Doi: 10.28991/CEJ-2023-09-12-012 Full Text: PDF

Landslides pose a significant threat to the Tapalang District in Mamuju, because of its geographical conditions, steep slopes, high rainfall intensity, and frequent seismic activity. This study aims to analyze the Landslide Hazard Index (LHI) in the region using Geographic Information Systems (GIS) and the Analytical Hierarchy Process (AHP) to determine the spatial distribution of the landslide risks and identify high-risk zones. The methodology incorporates topographical, geological, land use, soil type, and rainfall data, assessed through an AHP-based multi-criteria analysis, and mapped using GIS tools to create a comprehensive landslide susceptibility map. The results indicate that Tapalang District shows different levels of landslide susceptibility, with high-risk areas primarily found in regions featuring steep slopes, loose soil composition, and notable land-use changes. Moderate-risk zones encompass a significant portion of the district and necessitate ongoing monitoring, whereas low-risk areas are largely situated in flatter, more stable regions. The novelty of this study lies in the integrated use of GIS and AHP to improve the accuracy of landslide risk assessment by offering a quantitative and spatially detailed risk classification. This innovation provides a replicable and scalable decision-support model for local governments and disaster management agencies to develop proactive mitigation strategies, including early warning systems, land-use regulation enforcement, and slope stabilization measures. This research contributes to disaster management planning by providing a robust framework for assessing and mitigating landslide hazards in Tapalang and other similarly vulnerable regions.

Climate change occurred in Indonesia has a great impact. It can be indicated by the changes of seasons, rainfall patterns, and temperature. Changes in rainfall patterns may result in seasonal shifts. The purpose of this study is to identify changes in rainfall and discharge on Saddang Watershed, including Buntu Batu River, Mata Allo River, and Pekkabata River. The method used is to collect rainfall data and debit to analyzed by regression analysis. As the result of the study, it is found that rainfall on the River Buntu Batu has decreased during the last 6 years. Beside that, rainfall on Mata Allo River also has decreased over the last 10 years and has experienced a decrease over the past 10 years. Rainfall on Pekkabata River also has decreased over the last 10 years and has experienced a decrease in discharge over the past 10 years. Overall, the rainfall on Sadddang River has decreased over the past 10 years and has experienced a decrease in discharge over the past 10 years.

Estuary adalah tempat pertemuan air tawar dan air asin yang di pengaruhi oleh pasang surut. Pengaruh pasang surut terhadap sirkulasi aliran seperti kecepatan, profil muka air dan intrusi air asin di estuari dapat sampai jauh ke hulu sungai tergantung pada tinggi pasang surut. Penelitian ini dilakukan di Muara Sungai Jeneberang dengan mengukur langsung masa air yaitu salinitas, temperature, dan densitas. Penelitian dilakukan untuk memetakan pola sebaran dan stratifikasi struktur massa air secara spasial pada saat spring tide dan neep tide di Muara Sungai Jeneberang pada saat kondisi pasang menuju surut dan pada saat kondisi surut menuju pasang. Tahapan dalam pengolahan data menggunakan tools Sistem Informasi Geografis/Geographic Infromation System (ArcGis) yang sebelumnya dilakukan pengukuran, pengamatan, perekaman, dan pemetaan. Data hasil pengukuran kemudian dibuat dalam model spasial dengan menggunakan Aplikasi ArcGis untuk melihat pola sebaran struktur massa air akibat pengaruh pasang surut. Pola sebaran dan pelapisan massa air ini diperlihatkan secara spasial pada saat spring tide dan neep tide, pada kondisi pasang menuju surut dan kondisi surut menuju pasang. Pola sebaran struktur massa air secara spasial ini perlu ditambahkan dengan memperlihatkan pola sebabarannya secara vertical, sehingga dapat melihat profil kolom air dan kondisi pencampuran yang terjadi akibat pengaruh pasang surut