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Gunarto, Danang
Universitas Tanjungpura
Civil Engineering, Building, Construction & Architecture Computer Science & IT Energy Engineering Environmental Science Immunology & microbiology Materials Science & Nanotechnology Public Health Transportation

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PRIORITIZATION OF MITIGATION AND FLOOD RISK REDUCTION EFFORTS IN KOTA SINGKAWANG Ranate, Chelsea; Soeryamassoeka, SB; Gunarto, Danang
Jurnal Teknik Sipil Vol 24, No 1 (2024): Vol 24, No 1 (2024): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2024
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v24i1.76660

Abstract

Floods present significant challenges to urban areas globally, including Kota Singkawang in West Kalimantan, Indonesia, due to its susceptibility to seasonal monsoons. Mitigation efforts are crucial to protect lives, infrastructure, and sustainable development amidst urbanization and climate change. This research delves into flood risk reduction methods by integrating technical, economic, social, and environmental dimensions to aid policymakers and stakeholders in efficient resource allocation.This study aims to enhance flood resilience by identifying critical intervention areas through structured approaches, leveraging literature reviews, field surveys, and consultations with local authorities and communities. Prioritizing flood risk mitigation involves evaluating existing strategies and implementing structural measures like flood control buildings.The analysis findings indicate that the primary focus for mitigation efforts and flood risk reduction in Kota Singkawang should involve structural measures, specifically implementing flood control structures like polder systems and retention ponds to effectively address sea tides and heavy rainfall impacts. However, given the preliminary nature of this study, a more thorough investigation with comprehensive data is necessary to implement these structural technologies fully. This comprehensive analysis underscores the significance of comprehending flood risk complexities to formulate sustainable urban strategies in Kota Singkawang.
Mapping of Flood-Prone Area Under the Impact of Tidal Influence in Singkawang City Senoaji, Arif; Soeryamassoeka, S.B.; Gunarto, Danang
Jurnal Teknik Sipil Vol 24, No 1 (2024): Vol 24, No 1 (2024): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2024
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v24i1.73031

Abstract

Flooding is a recurring seasonal hazard that occurs when water overflows its natural channels and inundates surrounding areas. In the last three years, Singkawang City has experienced frequent flooding that has disrupted community activities, including education and public services, although no casualties have been reported. To reduce flood impacts, comprehensive and integrated flood management is required, beginning with the identification and mapping of flood-prone areas. This study aims to analyze tidal characteristics and assess flood vulnerability in Singkawang City by producing a zoning map of flood-prone areas. The analysis used several parameters, including distance from the coastline, river buffer, land slope, land elevation, and land cover. Flood-prone areas were mapped using Geographic Information Systems (GIS) combined with the weighted overlay method. The results show that 24,048.449 ha (43.947%) of the study area are classified as safe from flooding, while 19,938.498 ha (36.436%) are categorized as not vulnerable. Vulnerable areas cover 9,068.206 ha (16.571%), and very vulnerable areas cover 1,666.860 ha (3.046%).
EVALUATION OF DRAINAGE CHANNEL CAPACITY ON JALAN BUDI KARYA, PONTIANAK SELATAN SUB-DISTRICT Suci, Suci; Herawati, Henny; Umar, Umar; Soeryamassoeka, SB; Gunarto, Danang
Jurnal Teknik Sipil Vol 22, No 2 (2022): JURNAL TEKNIK SIPIL EDISI DESEMBER 2022
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v22i2.59386

Abstract

Drainage is one of the most critical components to be maintained and developed in a strategically healthy and comfortable urban environment. There are often puddles of water on Budi Karya Street, especially at the Permai Reservoir Complex. In solving the existing inundation problem, primary and secondary data are needed. Primary data is in the form of longitudinal and transverse sections of the channel, while secondary data is in the form of location maps, tidal data, and rainfall data used to analyze hydrology. Based on the analysis of the capacity of Budi Karya's drainage channel using  HEC  -RAS software as a drainage channel flow modeling tool to view the water level profile along the channel, channel perspective drawing, or hydrograph, it was found that the Budi Karya drainage channel could not accommodate the planned discharge for return periods 2 and 5 Year. Therefore, it is necessary to improve drainage in the form of the normalization of drainage channels.
ANALYSIS OF FLOOD HYDROGRAPH IN THE LANDAK SUB WATERSHED Miranda, Juwita; Soeryamassoeka, SB; Gunarto, Danang
Jurnal Teknik Sipil Vol 23, No 3 (2023): JURNAL TEKNIK SIPIL EDISI AGUSTUS 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v23i3.67407

Abstract

This research is motivated by the natural flooding disaster in the Landak sub-watershed area, which can be caused by river overflow due to high rain intensity. Flood discharge can be calculated using the Synthetic Unit Hydrograph method if the available data is limited, such as only obtaining rainfall data and watershed characteristics.Several Synthetic Unit Hydrograph (SUH) methodologies, including SUH Snyder, Nakayasu, Soil Conservation Services (SCS), Gama I, ITB, and Limantara, were utilized in this study. The analyzed data included precipitation data and measured discharge data. Rainfall data are analyzed using the homogeneity test, statistical descriptors, and chi-squared to determine the planned flood discharge. Then, continue with the study of rainfall frequency and analysis of rainfall intensity so that the maximal discharge can be analyzed using three SUH methods: HSS Snyder, Nakayasu, and SCS. The analysis of measured release is conducted by statistically analyzing estimated discharge data.The analysis results are then compared to obtain the percentage error between the discharge plan and the minimum measured discharge. The results showed that the HSS Snyder method was selected for analyzing flood discharge in the Landak sub-watershed basin because it has the minimum percentage error from comparing planned release and measured discharge values. Therefore, for the calculation of flood discharge analysis of the Landak sub-watershed basin, the HSS Snyder method is used with the acquisition of flood discharge plans for the return period of 2, 5, 10, 20, 50, and 100 years of 648,880 m3/sec, 896,335 m3/sec, 1025,954 m3/sec, 1132,006 m3/sec, 1252,788 m3/sec, 1335,273 m3/sec.
FLOOD MANAGEMENT STRATEGY IN THE LANDAK SUB-RIVER BASIN USING SWOT ANALYSIS Alfaro, Aldi; Soeryamassoeka, SB; Gunarto, Danang; Umar, Umar; Yulianto, Eko
Jurnal Teknik Sipil Vol 23, No 1 (2023): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v23i1.61790

Abstract

The Landak sub-River Basin is part of the Kapuas River Basin which is drained by the Landak River with an area of approximately 7,921 km2. Flooding in the Landak sub-River Basin occurs every year with the number of cases tending to increase. Flooding in the Landak sub-River Basin inundates about 20 villages, which means that flood-prone areas dominate. The causes of flooding in the Landak sub-River Basin are very complex, basically caused by natural and non-natural factors. Specifically, there are many problems in the Landak sub-River Basin that are thought to trigger flooding such as land use change, decreasing catchment areas, blockages in small rivers, and so on. To identify strategic issues regarding flooding in the Landak sub-River Basin, a Focus Group Discussion (FGD) was conducted which was attended by several resource persons who were credible with the subject matter and an AHP analysis was conducted first to determine the priority scale of flood management in the Landak sub-River Basin. The result of determining the priority scale of flood management in the Landak sub-River Basin is the strengthening and implementation of regulations. The resulting strategic issues were subjected to a questionnaire that was assessed by the respondents involved during the FGD. The results obtained from this series of SWOT analyses are the formulation of strategies that are most suitable for the strategic issues of flooding in the Landak sub-River Basin using QSPM analysis, along with the determination of short-term, medium-term and long-term strategies using SFAS analysis.
APPLICATION OF THE PENMAN-MONTEITH METHOD TO DETERMINE THE CROP WATER REQUIREMENTS Arzita, Tasya Dyta; Nurhayati, Nurhayati; Gunarto, Danang
Jurnal Teknik Sipil Vol 23, No 1 (2023): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v23i1.59595

Abstract

Agricultural production is critical to meeting Indonesia's food demands. The water catchment area of Parit Keladi 1, located in Desa Parit Keladi, Kecamatan Sungai Kakap, Kabupaten Kubu Raya, Provinsi Kalimantan Barat, includes tidal swamp land that has a variety of plants. The Cropwat 8.0 Software will be used in this research to assess crop water needs. This research employs primary and secondary data, including soil samples, field cropping patterns, and plant hydration levels.The type of clay soil was silty, the field cropping pattern at the study site was paddy, and the height of the water puddle on paddy was 3 mm/day/ha, according to the findings of primary data analysis on soil sampling. The maximum water need for paddy was 5.90 mm/day/ha in March period 1, while the lowest water requirement was 0 mm/day/ha in October period 1. The maximum water need for citrus was 2.62 mm/day/ha in August for period 3, while the lowest water requirement was 0 mm/day/ha from October to December and May to June for period 1. In September Period 3, the crop water required in the Cropwat 8.0 Software was 32.2 mm/day/ha for ten days; however, the water level in the field was 3 mm/ha for one day in late September. Thus, the estimate of water demands for rice plants using the Cropwat 8.0 Program is valid.
RAINWATER HARVESTING ANALYSIS FOR ICU BUILDING OF DR. AGOESDJAM REGIONAL GENERAL HOSPITAL, KETAPANG Kisnadharma, Abang Gagit; Winardi, Winardi; Gunarto, Danang
Jurnal Teknik Sipil Vol 24, No 1 (2024): Vol 24, No 1 (2024): JURNAL TEKNIK SIPIL EDISI FEBRUARI 2024
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v24i1.75858

Abstract

Clean water is indispensable for public health, especially in healthcare facilities like hospitals, which require a reliable supply to support various medical and non-medical activities. dr. Agoesdjam Regional General Hospital (RGH) in Ketapang is vital in delivering healthcare services to its community. Given challenges with traditional clean water sources, rainwater harvesting (RWH) emerges as an appealing alternative in areas lacking adequate water infrastructure.This study focuses on planning a rainwater harvesting system at dr. Agoesdjam RGH, identifying rainwater potential, designing collection and storage systems, and evaluating sustainability and effectiveness in meeting hospital water demands. The significance lies in advancing sustainable water supply systems for hospitals and guiding similar facilities toward adopting rainwater as a viable water source, enhancing healthcare service delivery and community access to clean water.The analysis shows that the daily demand for clean water for the ICU building at Dr. Agoesdjam RGH is 2.6 m ³/day, translating to 78 m ³/month based on standard guidelines. Rainfall intensity calculations (120 mm/hour) indicate a need for roof area adjustments to optimize rainwater capture. Specific gutter dimensions (8-inch horizontal, 4-inch vertical) are determined for efficient water flow. A ground tank with a volume of 135 m ³ is planned to ensure adequate water storage. This research underscores the critical role of rainwater harvesting in hospital water supply management, providing insights for effective implementation and contributing to sustainable healthcare infrastructure development.
Analysis of Flood Prone Areas in Melawi Sub Watershed Using Geographic Information System Candra, Diki; Soeryamassoeka, Stefanus Barlian; Gunarto, Danang
Jurnal Teknik Sipil Vol 24, No 4 (2024): Vol 24, No 4 (2024): JURNAL TEKNIK SIPIL EDISI NOVEMBER 2024
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v24i4.83107

Abstract

Floods are a common natural disaster in West Kalimantan, including in the Melawi Sub-Watershed, causing infrastructure damage, economic losses, and even fatalities. One of the leading causes of flooding is the destruction of catchment areas and significant land cover changes. The Melawi sub-Watershed has numerous mining areas, many of which are illegal, leading to upstream erosion and downstream sedimentation. Therefore, mapping flood-prone areas in the Melawi Sub-Watershed is crucial for disaster mitigation and preventing environmental damage that affects community activities. This study aims to map flood-prone areas in the Melawi Sub-Watershed using a Geographic Information System (GIS) and analyze the factors influencing flood susceptibility. The data include land cover, soil type, slope, elevation, rainfall, river buffers, and historical flood inundation. The overlay method was used to create the flood susceptibility map, involving scoring, weighting, and overlaying. The most dominant flood susceptibility level in the Melawi Sub-Watershed is moderate, covering 48.21% of the total area, mainly in the downstream regions. Meanwhile, the low flood susceptibility category is more prevalent upstream, with higher topography and land cover well-preserved.
DETERMINATION OF THE PRIORITY SCALE OF FLOOD MANAGEMENT IN THE LANDAK SUB-WATERSHED Akafi, M. Ma'ruf; Soeryamassoeka, SB; Gunarto, Danang; Nirmala, Azwa; Danial, Mochammad Meddy
Jurnal Teknik Sipil Vol 23, No 2 (2023): JURNAL TEKNIK SIPIL EDISI MEI 2023
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jtst.v23i2.64168

Abstract

The Landak Sub Watershed is part of Indonesia's Kapuas River Basin, covering an area of approximately 7,921 km2 and comprising three administrative regions: Landak Regency, Kubu Raya Regency, and Pontianak City. Like other regions in Indonesia, the frequency of flood events in the Landak Sub Watershed has been increasing each year, becoming a severe problem as it has caused losses for the community. Therefore, a study is needed to provide an overview of the most suitable flood management measures to minimize floods in the Landak Sub Watershed.This article presents the research results to determine the priority scale of flood mitigation measures suitable for implementation in the Landak Sub Watershed using the Analytic Hierarchy Process (AHP). The determination of criteria, sub-criteria, and flood management alternatives is based on the results of a Focus Group Discussion (FGD) held in Ngabang City on August 30, 2022. The selected flood management alternatives combine both structural and non-structural measures. Once the hierarchy is established, a questionnaire is distributed to determine the appropriate options for flood mitigation in the Landak Sub Watershed.The study results indicate that the priority scale for flood mitigation in the Landak Sub Watershed is by revising regulations and policies. The analysis shows that the priority criterion is Law and Institutions with a weight of 0.376, the priority sub-criterion is Legislation with a weight of 0.213, and the priority alternative is the revision of regulations and policies with a weight of 0.1984. For the correction of rules and procedures to be effectively carried out, all stakeholders related to flood control in the Landak Sub Watershed must be involved.
Flood Hazard Level Analysis of Kapuas Hulu Sub-watershed Using Geographic Information System Simanjuntak, Nunut Rialdi; Umar, Umar; Gunarto, Danang; Soeryamassoeka, S. B.
Jurnal Teknik Sipil Vol 24, No 4 (2024): Vol 24, No 4 (2024): JURNAL TEKNIK SIPIL EDISI NOVEMBER 2024
Publisher : Fakultas Teknik Universitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/jts.v24i4.86222

Abstract

This article analyzes the flood hazard level in the Kapuas Hulu Sub-watershed using a Geographic Information System (GIS). The flood risk in this region is influenced by various factors such as soil types, land cover, elevation, slope, rainfall, and human activities. Ultisol (64.44%) significantly contributes to flood risk due to its low water permeability, leading to surface runoff during heavy rain. Inceptisol (31.73%) also plays a role in flood dynamics, with its water retention capacity dependent on vegetation. Smaller areas of Histosol (0.50%) and Spodosol (0.07%) pose localized flooding risks in lowland regions. The dominant land cover, primarily dryland forest, helps mitigate flooding, while settlements and agricultural zones increase vulnerability by reducing water absorption. Low-lying areas (50-100 meters) and steep slopes (25-45%) further exacerbate flood potential"”areas receiving moderate to high rainfall increase surface runoff and flood risk. GIS-based analysis categorizes flood vulnerability into low, medium, and high levels, with 57.71% of the area classified as low vulnerability. Recommendations for flood risk mitigation include soil conservation, reforestation, sustainable land management, and drainage system improvements in vulnerable areas.
Co-Authors - Kartini ., Trimawan Abdillah, Ma'arif Ade Kurniawan Ahen, Martinus Aji, Panji Septi Akafi, M. Ma'ruf Alfaro, Aldi Amanda, Jessi Apriyandi, - Arianto, Rio Arzita, Tasya Dyta Azwa Nirmala Barage, Lourdes Meirista Candra, Diki Eka Priadi EKO YULIANTO Endyi, - Erwanda, Ery Fakhrully, Ya' Dhally Fattah, Fathan Abdul Fiqih Rahmanto Firdayati, Rafi' Fitri Meliana, Fitri Fung, Nyit Hamiah, Wan Helmi, Dani Herawati, Henny Hestiningrum, Mellenia Irmansah, Muhamad Kartini Kartini Kaslina, Yohana Kembara, Riko Kisnadharma, Abang Gagit Liehan, James Mahendra, Dandy Roffi Miranda, Juwita Mochammad Meddy Danial Muhammad Azhar Irwansyah Muhammad Fikri Nata, Waldi Novelyne, Fiona Gita Nurhadi Nurhayati Nurhayati Pratama, Andikha Pratama, Fadli Mada Ramadhan, Ade Rambe, Adinda Wulandari Nauli Ranate, Chelsea Rivaldy, Arya Riyanda Nurcahyo Sakong, Mila Leonasari Senoaji, Arif Silalahi, Kevin Aglesio Simanjuntak, Nunut Rialdi Soefani, Safira Milenia Sood, Muhammad Furqan Stefanus Barlian Soeryamassoeka Suci Suci, Suci Sutopo, Suryo Teofano, Enrico Umar Umar Umar Umar Umar, - Winardi Winardi