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All Journal Jurnal Teknik Pengairan: Journal of Water Resources Engineering Jurnal Teknik Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan
Hilma Wasilah Robbani
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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The Analysis of GCP Correction Toward GNSS-PPK for LandRegistration Base-map in Muktisari Village, Cipaku District, Ciamis Regency Niswah Selmi Kaffa; Regita Faridatunisa Wijayanti; Taufik Kusetiyohadi; Hesekiel Sijabat; Tedy Pranadiarso; Hilma Wasilah Robbani; Gholiqul Amrodh Alawy
Jurnal Teknik: Media Pengembangan Ilmu dan Aplikasi Teknik Vol 23 No 2 (2024): Jurnal Teknik - Media Pengembangan Ilmu dan Aplikasi Teknik
Publisher : Fakultas Teknik - Universitas Jenderal Achmad Yani

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55893/jt.vol23no2.571

Abstract

The Comprehensive Systematic Land Registration Program (PTSL) main requirement is land registration map in a scale of 1:1000 and horizontal accuracy (CE90) class 1 of 0,3 meters. Global Navigation Satellite System–Post Processing Kinematic (GNSS-PPK) provides good accuracy without Ground Control Point (GCP) correction, thus reducing cost and data acquisition time. GNSS-PPK without GCP correction is considered accurate in areas <500 meters elevation. This research aims to determine the GCP correction importance for photo accuracy in PPK process. This study analyzes aerial photo accuracy with and without GCP correction in areas with elevations from 200 to 430 meters. The data required are aerial photos, coordinates in RINEX files, Digital Terrain Model (DTM), and 8 GCP points. Coordinate files are calculated using the PPK method then used for photo correction. Photos are processed with and without GCP correction. Photo without GCP correction has a significant deviation than photo with GCP correction and does not meet the CE90 requirements. The accuracy has a negative correlation with an elevation of -0,041 without GCP and -0,76 with GCP. This study proves that GNSS-PPK method still requires GCP and it is not proven deviation in data without the GCP correction is directly proportional to elevation.
Flood Disaster Mitigation Strategy due to Land Cover Change in Kalijompo Sub-watershed Kartikasari, Adelia Nur Isna; Muttaqin, Dai Agus; Derka, Icha Tatrisya; Pranantya, Vanadani; Robbani, Hilma Wasilah
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 16 No. 1 (2025)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2025.016.01.4

Abstract

Kalijompo sub-watershed is included in the Bedadung watershed of Jember Regency. Bedadung watershed is the largest watershed in Jember, and it has a land cover change. One of the factors influencing land cover change is forest fires, which cause a significant reduction in forest area. The significantly reduced forest area will impact increasing river discharge and result in flooding downstream. The downstream of Kalijompo is located in the city center of Jember, which has a dense residential area. Therefore, it is necessary to conduct a flood mitigation strategy. This research aims to assess flood risk and ideal land cover management so that this research can be used as a basis for designing flood disaster mitigation strategies due to land use change. The Soil Water Assessment Tool application models the flood response to land cover and determines sub-watersheds that contribute highly to watershed damage. The flood response model was used as the basis for simulation by creating several land cover scenarios to find the appropriate and optimal land use. Flood risk assessment was obtained by combining the components of flood hazard and vulnerability. Flood mitigation strategies were derived from the land use scenarios complemented by Strengths, Weaknesses, Opportunities, and Threats analysis to identify various factors. The results showed that Kalijompo contributed significantly to watershed damage, and 21.93% of the Kalijompo area was at a high flood risk level. One of the mitigation strategies is managing forest land use, which should be 30% of the total Bedadung watershed area.
Benefit-Cost Analysis of Bioretention for Suburban Drainage Load Reduction Induced by Surface Runoff Putri, Fidyasari Kusuma; Robbani, Hilma Wasilah; Pranantya, Vanadani; Widiarti, Wiwik Yunarni; Wiyono, Retno Utami Agung
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 10 No 2 (2025): SEPTEMBER
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v10i2.1558

Abstract

Suburban areas with predominantly residential land use and low soil infiltration rates are highly vulnerable to surface runoff and local flooding. This study examines the effectiveness and economic performance of bioretention systems as a runoff management solution in the Wonojati and Jenggawah areas, Jember Regency. Hydrological simulations were conducted using SWMM 5.2 software for two intervention scenarios, namely the application of bioretention in 10% and 20% of the subcatchment areas. The effectiveness of the system was evaluated based on runoff volume reduction, while the economic aspect was assessed using the Benefit-Cost Ratio (BCR) approach. The simulation results showed that the system reduced runoff by 13.6% in Plan 1 and 17.4% in Plan 2. However, BCR values of 0.014 and 0.022, respectively, indicate that the annual financial benefits are not sufficient to cover the system’s annualized costs. These findings highlight the need for alternative approaches that are more economically efficient. The use of decentralized LID systems such as rain barrels is considered more adaptive for dense residential areas and is recommended as a complementary solution to enhance the resilience of drainage systems in flood-prone suburban regions.
Co-Authors Derka, Icha Tatrisya Gholiqul Amrodh Alawy Hesekiel Sijabat Kartikasari, Adelia Nur Isna Muttaqin, Dai Agus Niswah Selmi Kaffa Putri, Fidyasari Kusuma Regita Faridatunisa Wijayanti Retno Utami Agung Wiyono Taufik Kusetiyohadi Tedy Pranadiarso Vanadani Pranantya Wiwik Yunarni Widiarti