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All Journal Indonesian Journal of Geography JURNAL HUTAN TROPIS
Randy Alihusni Wardana
Program Studi Teknik Geodesi Fakultas Teknik, Universitas Diponegoro
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

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Evacuation Model of Earthquake in Multi-Storey Building using 3D GIS and Agent-Based Model Arifati, Azmiyatul; Nisaa', Ratri Ma'rifatun; Nurmaya, Acintya; Wardana, Randy Alihusni
Indonesian Journal of Geography Vol 57, No 3 (2025): Indonesian Journal of Geography
Publisher : Faculty of Geography, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijg.92295

Abstract

Evacuation simulations in multi-storey building using 3D GIS and ABM require further study. Existing models lack comprehensive input on various building attributes. This research aims to develop a model for simulating earthquake evacuations in multi-storey buildings. The building and its occupants (agents) are modeled in detail, with building dimensions and designs obtained through measurements and field surveys. A field observation was conducted to determine agent's distribution. Agents placed in the building model are given certain behaviors once evacuation begins. The research focuses on a multi-storey building at Universitas Gadjah Mada (UGM). The model can assess the effectiveness of current evacuation facilities. Computer simulation results show that 266 agents require 140.8 seconds to evacuate, with no bottleneck observed at any location. A guest agent, assumed to lack knowledge of the building’s emergency information, is observed to exit last. In contrast, the fastest evacuation is achieved by agents familiar with the building, represented by a group of lecturers/staff. Model validation, through comparison with a drill simulation, shows a time difference of 0.45 seconds. Findings indicate that, under current scenarios, the building’s evacuation facilities have adequate capacity. 
RAPID ASSESSMENT OF COASTAL ECOSYSTEM AND BIODIVERSITY IMPACTS DRIVEN BY SHRIMP AQUACULTURE IN NORTHERN JAVA Palgunadi, Muhammad Alriefqi; Fathurrahman, Achmad Fuad; Azril, Muh; Jaenudin, Agus; Wardana, Randy Alihusni; Setyaningsih, Yuni
Jurnal Hutan Tropis Vol 13, No 4 (2025): Jurnal Hutan Tropis Volume 13 Nomer 4 Edisi Desember 2025
Publisher : Lambung Mangkurat University-Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jht.v13i4.24511

Abstract

Shrimp aquaculture has rapidly expanded along Indonesia’s northern Java coast, raising concerns about its ecological implications, particularly in traditional shrimp farming. This rapid assessment evaluates the environmental and biodiversity impacts of traditional shrimp farming in Brebes, Central Java, focusing on current ecosystem conditions and future implications through scenario-based analysis. This study conducted a rapid ecological assessment to evaluate the environmental and biodiversity impacts of long-established traditional shrimp ponds. A descriptive qualitative approach was used, combining ecological field surveys, spatial analysis, interviews, and scenario-based comparisons of “with farm” and “no farm” conditions. The assessment recorded 54 plant species and 50 fauna species, including 10 nationally protected fauna and the Vulnerable smooth-coated otter (Lutrogale perspicillata), which faces increasing conflict with farmers. Spatial analysis confirmed that shrimp ponds are located outside protected areas and critical habitats and were not constructed on converted mangrove or natural wetlands ecosystem. Scenario modelling comparing "with farm" and "no farm" conditions highlights trade-offs between aquaculture expansion and biodiversity maintenance. Although ponds can create new niches for certain bird species, they may limit habitat connectivity for mammals. Community-based mangrove planting and ecological buffers offer promising mitigation pathways. As a rapid ecological assessment, this study provides baseline insights that can inform more detailed, long-term ecological monitoring and management of aquaculture landscapes in Northern Coast of Java.
Co-Authors Agus Jaenudin Arifati, Azmiyatul Azril, Muh Fathurrahman, Achmad Fuad Nisaa', Ratri Ma'rifatun Nurmaya, Acintya Palgunadi, Muhammad Alriefqi Setyaningsih, Yuni