Article Per Year (5 Year)
p-Index From 2020 - 2025
0.751
P-Index
This Author published in this journals
All Journal TEKNIK Jurnal Review Pendidikan dan Pengajaran (JRPP) JURNAL TEKNIK HIDRAULIK
Dhemi Harlan, Dhemi
Kelompok Keahlian Teknik Sumber Daya Air, Fakultas Teknik Sipil dan Lingkungan, Institut Teknologi Bandung.
Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Engineering Languange, Linguistic, Communication & Media Social Sciences Other

Published : 4 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 4 Documents
Search

 1 
Impact Analysis of Land Use on Time Lag and Peak Discharge in the Downstream Area of Sadia Watershed Bima City West Nusa Tenggara using HEC-HMS and SCS-CN Hartawan, I Putu; Siddik, Firmana; Firmana, Ary; Susetyo, Ekanto Wahyudi; Harlan, Dhemi; Handyastono, Bagus; AS Algoul, Mohammed
TEKNIK Vol 46, No 3 (2025): Vol 46, No 3 (2025): July 2025 Publication in-progress
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/teknik.v46i3.75074

Abstract

Flood events have frequently occurred in the downstream area of the Sadia Watershed (DAS) in Bima City, West Nusa Tenggara. In recent years, the overflow of the Sadia River has been triggered by land use changes and the impacts of climate change. This study aims to analyze land cover changes in 2015, 2019, and 2022, and to evaluate their impact on flood peak discharge using hydrological simulations, land cover data were analyzed using ArcGis software and integrated with hydrological modeling using HEC-HMS. The Synthetic Unit Hydrograph (HSS) SCS-CN method was used in the simulation with a 25-year return period, following calibration of the Sadia River’s bank full discharge to ensure model accuracy. The simulation results showed an increase in the peak discharge entering the Sadia River, from 156,20 m³/s in 2015 to 164,80 m³/s in 2019, and 167,00 m³/s in 2022. Additionally, the time lag decreased from 445.15 minutes in 2015 to 431.84 minutes in 2019 and 429.88 minutes in 2022. The increase in the Curve Number (CN) value and impermeable area indicates a reduction in soil infiltration capacity due to land conversion. However, climate factors, such as increased rainfall intensity, also contributed to the rise in peak discharge. These findings can serve as a basis for better land use management and emphasize the importance of considering climate factors when designing flood risk mitigation efforts, especially in the face of increasing flood events.
KAJIAN PERENCANAAN BENDUNG TAPAN, KABUPATEN PESISIR SELATAN, PROVINSI SUMATRA BARAT Zulherfina, Melvi; Kumala, Yiniarti Eka; Harlan, Dhemi; Natasaputra, Suardi; Yuenza, Alif Kania Jenti
Jurnal Review Pendidikan dan Pengajaran Vol. 8 No. 3 (2025): Volume 8 No. 3 Tahun 2025
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jrpp.v8i3.47471

Abstract

Kabupaten Pesisir Selatan, khususnya kawasan Kumbung memiliki daerah pertanian yang luas tetapi karena kurang memadainya sistem pengairan dan tidak maksimalnya pasokan air ke lahan pertanian mengakibatkan terjadinya penurunan fungsi sawah irigasi. Direncanakan sebuah bangunan air yaitu bendung pada sungai Tapan untuk mengembangkan potensi sungai dan membantu penyediaan air supaya sawah berfungsi secara optimal. Dalam tulisan ini dibahas mengenai perencanaan sebuah bendung dari tahap pemilihan lokasi hingga kebutuhan stabilitas bendung. Terdapat tiga alternatif lokasi dalam perencanaan bendung Tapan ini, dimana alternatif ke dua yang terletak di Limau Purut mendapatkan poin layak terbanyak dari persyaratan yang ada. Berdasarkan hasil perhitungan didapatkan debit rancangan periode ulang 100 tahun sebesar 884,86 m3/s. Bendung inipun direncanakan menggunakan mercu tipe Bulat Satu Radius dan peredam energi tipe MDO. Setelah melakukan perhitungan gaya-gaya yang bekerja pada bendung dan melakukan pengecekan kebutuhan stabilitas bendung, bendung ini sudah memenuhi kebutuhan stabilitas terhadap Guling dan Geser.
Pemodelan Hidrodinamika Aliran dan Transportasi Sedimen pada Ruas Pertemuan Sungai Citarum Hilir dan Cibeet, Jawa Barat Suryadi, Yadi; Siregar, Ruth Helena; Harlan, Dhemi; Samskerta, I Putu
JURNAL TEKNIK HIDRAULIK Vol 15, No 1 (2024): Jurnal Teknik Hidraulik
Publisher : Direktorat Bina Teknik Sumber Daya Air, Kementerian Pekerjaan Umum dan Perumahan Rakyat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32679/jth.v15i1.727

Abstract

Flooding and changes in riverbed morphology often become issues near river confluences, as observed at the confluence of Citarum Hilir and Cibeet Rivers. This study aims to analyze the cross-sectional capacity and riverbed changes around the confluence of Citarum Hilir and Cibeet Rivers. This study utilizes 1D numerical modeling MIKE 11 with Hydrodynamic and Sediment Transport Modules. The hydrodynamic modeling inputs are river network and cross-sectional profiles. Hydrographs with return periods of 2, 5, 10, and 25 years are used as upstream boundaries, and a discharge curve is used as the downstream boundary of the model. The model is calibrated using water surface elevation measurements taken from September 13-16, 2021. The hydrodynamic modeling results indicate that Citarum Hilir and Cibeet Rivers cannot convey flood discharges with a 2-year return period. The sediment transport modeling results show no significant changes in the riverbed of Citarum Hilir before the confluence, but degradation of approximately 0.38 – 0.46 meters occurs after the confluence. Degradation happens in zones of maximum velocity where flow turbulence and shear stress increase, causing erosion of the Citarum Hilir riverbed. Degradation also occurs near the Cibeet River confluence due to flow acceleration at the outer bend of the river. Flooding and sediment transport are natural factors that can alter the morphology of river confluences, such as the confluence of Citarum Hilir and Cibeet Rivers.Keywords:  Citarum river, Cibeet river, river confluence, hydrodinamic modeling, sedimen transport modeling 
ANALISIS KINERJA SALURAN PENGALIHAN BANJIR PADA DAS SIKAMBING KOTA MEDAN Jul Fachri, Fiqih; Harlan, Dhemi; Nugroho, Joko; Chaidar, Ana N.
Jurnal Review Pendidikan dan Pengajaran Vol. 8 No. 1 (2025): Volume 8 No. 1 Tahun 2025
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jrpp.v8i1.41368

Abstract

Dalam rentang periode 2015 hingga 2024, Kota Medan mengalami 14 kejadian banjir yang menunjukkan rata-rata kejadian banjir setiap tahunnya. Salah satu penyebab utama dari kejadian banjir ini adalah meluapnya aliran Sungai Sikambing selama periode hujan tinggi. Untuk mengatasi permasalahan ini, dibangun saluran pengalihan di area hulu Sungai Sikambing dengan tujuan mengalihkan debit banjir sebesar 30 m³/dtk ke Sungai Belawan. Untuk menilai kinerja saluran pengalihan banjir, penelitian ini ditingkatkan dari hasil perencanaan sebelumnya dengan analisis hidrologi dan permodelan hidrodinamik menggunakan HEC-RAS 2D, yang diterapkan pada kondisi debit desain periode ulang 25, 50, dan 100 tahun. Hasil penelitian menunjukkan bahwa kinerja saluran pengalihan mampu mereduksi debit banjir rata-rata sebesar 21,79%, reduksi luas genangan rata-rata sebesar 48,75%, reduksi waktu kejadian banjir rata-rata sebesar 35,56% dan penurunan kedalaman banjir rata-rata hingga 0,21 m. Meskipun saluran pengalihan ini efektif dalam mereduksi debit banjir pada semua kondisi, terdapat selisih sebesar 4,75% dari rencana reduksi debit banjir yang dilakukan sebelumnya. Penelitian ini diharapkan dapat mengevaluasi kinerja saluran pengalihan untuk pengendalian banjir di DAS Sikambing Kota Medan.
Co-Authors AS Algoul, Mohammed Chaidar, Ana N. Firmana, Ary Handyastono, Bagus Hartawan, I Putu JOKO NUGROHO Jul Fachri, Fiqih Samskerta, I Putu Siddik, Firmana Siregar, Ruth Helena Suardi Natasaputra, Suardi Susetyo, Ekanto Wahyudi Yadi Suryadi Yiniarti Eka Kumala Yuenza, Alif Kania Jenti Zulherfina, Melvi