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Fitria Maya Lestari
Universitas Semarang
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Analisis Reduksi Debit Banjir Sistem Drainase Kali Kencing Di Kabupaten Kudus Istianah, Istianah; Lestari, Fitria Maya; Tutuko, Bambang
Jurnal Teknik Indonesia Vol 7, No 1 (2026): JTI (Jurnal Teknik Indonesia)
Publisher : Universitas Darul Ulum Islamic Centre Sudirman GUPPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61689/jti.v7i1.948

Abstract

Flooding is a common issue affecting various regions in Indonesia, particularly in densely populated urban areas. High rainfall intensity leading to river overflow, dense residential settlements, and inadequate drainage systems and environmental conditions are key factors contributing to flood disasters. This study aims to analyze the drainage capacity of the Kali Kencing channel, evaluate the existing drainage system, and assess the potential flood reduction through the implementation of a polder system within the Kali Kencing drainage network. A qualitative research method is applied, incorporating hydrological and hydraulic analyses, which are further simulated to model the relationship between retention pond storage and optimal pump capacity. The analysis reveals that the current drainage capacity of Kali Kencing is insufficient to convey the existing discharge, resulting in runoff that affects residential areas and agricultural fields. The existing system only includes a small long-storage facility and lacks adequate pumping capacity. Therefore, a retention pond covering 4.5 hectares is proposed to temporarily store excess water during elevated water levels in the Wulan River. Simulation results indicate that the retention pond can reduce peak flood discharge from 65.10 m³/s to 36.00 m³/s, achieving a 55% reduction. Additionally, the installation of two flood pumps with a capacity of 5 m³/s each, along with one pump of 1 m³/s for low-flow operation, is recommended to enhance system performance.
Study on Determining PRH Locations for Flood and Drought Mitigation in Semarang Regency Bambang Tutuko; Fitria Maya Lestari; Edy Susilo; Istianah Istianah
BRILIANT: Jurnal Riset dan Konseptual Vol 11 No 2 (2026): Volume 11 Nomor 2, Mei 2026
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/briliant.v11i2.2456

Abstract

Population growth, land-use conversion, and the reduction of vegetation cover have led to increasingly frequent floods and droughts in Semarang Regency. These conditions exacerbate surface runoff and reduce the soil’s capacity to store water, resulting in inundation during the rainy season and drought during the dry season. The objective of this study is to determine the location for installing Horizontal Recharge Pipes (HRP), which play an important role, particularly in flood-prone areas, by enhancing groundwater infiltration as a water reserve. The method applied in this research involves calculating the magnitude of runoff discharge in areas with potential flood inundation, which is then simulated with the application of HRP installation to determine the number of HRPs required to reduce flooding. Drought-prone areas were analyzed using satellite imagery to identify suitable HRP locations. In the Klegung watershed, 10 HRP units are required; in the Curug watershed, 460 units; and in the Lodong watershed, 835 units, all using a 12-inch diameter. Drought analysis using Landsat imagery identified dry areas in East Ungaran, Susukan, Suruh, Bancak, and Pringapus subdistricts. The installation points for HRPs can be prioritized based on areas experiencing inundation or drought. The implementation of HRPs is expected to infiltrate surface runoff effectively, thereby reducing flood risk while simultaneously increasing groundwater availability in Semarang Regency.
Co-Authors Afifah, Risdiana Cholifatul Ahmad Hakim Bintang Kuncoro Bambang Tutuko Bambang Tutuko Dyah Ari Wulandari Edy Susilo Edy Susilo Etika Herdiarti Etika Herdiarti Faizal Mahmud Istianah Istianah Istianah Istianah Kukuh Wisnuaji Widiatmoko Mudjiastuti Handajani Nurti Kusuma Anggraini Ratih Pujiastuti Risdiana Ch. Afifah Risdiana Cholifatul Afifah, Risdiana Sasmito S, Nuryanto Son Haji Son Haji Sri Wanto Suseno Darsono Sutik Sutik Sutik