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All Journal Jurnal Talenta Sipil
Pipit Skriptianata P.P
Jurusan Teknik Sipil, Fakultas Teknik, Universitas 17 Agustus 1945, Kota Semarang, Indonesia
Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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Perhitungan Kapasitas Kolam Retensi Rumah Susun Dosen Politeknik PU Nicko Fadhil Muhammad; Aprillya Trihartati; Pipit Skriptianata P.P
Jurnal Talenta Sipil Vol 9, No 1 (2026): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i1.1227

Abstract

Water conservation utilizing rainwater is very effective and efficient both in the rainy season and in the dry season. The construction of this lecturer housing must be supported by a good drainage system so as not to increase the burden of water runoff to the surrounding area. Problems that can be formulated include: what is the flood discharge of the return period Q2, Q5 and Q10 before and after the construction of the Rusun Dosen Polythecnic PU, how long can the retention pond and other water structures accommodate the flood discharge in the area, what alternatives can be implemented if the capacity of the retention pond and other structures cannot accommodate the flood discharge in the area. The purpose of this study is to analyze the flood discharge of the return period Q2, Q5 and Q10 before and after the construction. Analyze water structures that can accommodate flood discharge. Analyze alternatives that can be applied. The methodology used is data collection, data analysis (maximum rainfall, rainfall distribution, flood discharge) and calculation of the capacity of water structures. The conclusions obtained are: the potential flood discharge of existing conditions is 0.119 m3/sec, the potential flood discharge after the construction is 0.303 m3/sec, there is an increase in flood discharge of 0.184 m3/sec, the capacity of water structures: retention ponds can accommodate flood discharge of 1,408.53 m3, RWT can accommodate flood discharge of 92.4 m3, infiltration wells can accommodate flood discharge of 25.12 m3, drainage channels can accommodate flood discharge of 143.2 m3. The total capacity of the retention pond and other water structures will be full if it rains for 2.52 hours. This does not meet SNI 03-3424-1994 standards. The recommendation is to enlarge the channel dimensions
Analisis Kapasitas Sungai terhadap Pengendalian Debit Banjir (Studi Kasus Sungai Kendal) Nicko Fadhil Muhammad; Elsa Lailatut Tohiroh; Pipit Skriptianata P.P; Agus B. Siswanto
Jurnal Talenta Sipil Vol 9, No 2 (2026): Agustus
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/talentasipil.v9i2.1488

Abstract

Kendal Regency is located on the north coast of Java and is administratively divided into 20 districts, 265 villages, and 20 urban villages. The topography of Kendal Regency varies significantly, ranging from lowlands in the north to hilly terrain in the south. High annual sedimentation in the river channel—caused by soil erosion in the upstream areas of the Kendal watershed—can reduce the river's capacity to accommodate flood discharge. This study aims to determine the design flood discharge for the Kendal River, analyze the river's cross-sectional capacity to handle this discharge using HEC-RAS modeling, evaluate the existing capacity, and identify necessary improvements such as river normalization or levee raising. The methodology involved hydrological analysis to determine flood discharge for specific return periods and hydraulic analysis to evaluate both existing and proposed river cross-sections. The calculated design flood discharges for the Kendal River—using the Rational Method for return periods of 2, 5, 10, and 20 years—were 149.766 m³/s, 198.220 m³/s, 229.055 m³/s, and 255.484 m³/s, respectively. HEC-RAS hydraulic modeling results indicate that the existing Kendal River cross-section is incapable of accommodating the design flood discharge for these return periods; specifically, the analysis shows that the current capacity is insufficient to manage the Q20 flood event. Consequently, river normalization is recommended; a proposed normalization alternative featuring a trapezoidal cross-section—with a base width of approximately 10 meters, a top width of approximately 20 meters, and a depth of approximately 6 meters—demonstrated increased capacity in HEC-RAS simulations.
Co-Authors Agus B. Siswanto Aprillya Trihartati Elsa Lailatut Tohiroh Nicko Fadhil Muhammad