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All Journal SIPIL Jurnal Teknik Sipil Journal of the Civil Engineering Forum FROPIL (Forum Profesional Teknik Sipil) Jurnal Abdi Insani Journal of the Civil Engineering Forum Jurnal Teknik Sumber Daya Air
Roby Hambali
Universitas Bangka Belitung
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Transportation

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Analisis Erosi pada Daerah Aliran Sungai Baturusa Aghata Christin Natalia; Roby Hambali; Fadillah Sabri
Jurnal Teknik Sumber Daya Air Vol. 2 No. 1 (Juni 2022)
Publisher : Himpunan Ahli Teknik Hidraulik Indonesia (HATHI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (749.088 KB) | DOI: 10.56860/jtsda.v2i1.26

Abstract

DAS Baturusa merupakan DAS terbesar urutan keempat di Provinsi Kepulauan Bangka Belitung setelah DAS Mancung, DAS Linggang, dan DAS Kurau. Maraknya aktivitas tambang ilegal disinyalir menjadi penyebab kerusakan DAS di Kepuluan Bangka Belitung, salah satunya DAS Baturusa. Kerusakan yang umum terjadi pada DAS yaitu erosi lahan. Tujuan dari penelitian ini adalah mengetahui laju erosi, persebaran tingkat bahaya erosi (TBE), besar sedimen yang dihasilkan oleh erosi lahan dan penurunan erosi setelah dilakukan simulasi konservasi tanah pada DAS Baturusa. Metode yang digunakan dalam penelitian ini adalah metode USLE, dan data yang digunakan adalah data curah hujan (R), peta jenis tanah (K), peta kemiringan lereng (LS), peta tutupan lahan (C), serta pengelolaan dan konservasi tanah (P). Berdasarkan analisis yang telah dilakukan dengan menggunakan metode USLE, diperolah laju erosi tertinggi pada DAS Baturusa sebesar 4.777,083 ton/ha/tahun dan masuk dalam kategori sangat berat, sedangkan laju erosi terkecil adalah 12,571 ton/ha/tahun, masuk dalam kategori sangat ringan. DAS Baturusa didominasi oleh TBE sangat berat dengan luas 54.624,19 Ha atau 86,028% dari luas total DAS. Besaran sedimen yang dihasilkan oleh erosi pada DAS Baturusa yaitu 2.058.970,298 ton/tahun. Dengan dilakukannya arahan konservasi tanah pada beberapa satuan unit lahan, terjadi penurunan erosi sebesar 18.501.265,83 ton/tahun (76,206%), dari laju erosi semula 24.277.889 ton/tahun menjadi 5.776.623,649 ton/tahun.
PEMBANGUNAN PROTOTIPE SUMUR RESAPAN DI KAWASAN PERUMAHAN PADAT PENDUDUK KOTA PANGKALPINANG Roby Hambali; Yayuk Apriyanti; Irvani
Jurnal Abdi Insani Vol 8 No 2 (2021): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v8i2.406

Abstract

Pembangunan perumahan secara intensif yang dilakukan di Kota Pangkalpinang dengan kondisi yang minim ruang terbuka hijau menyebabkan tingginya limpasan permukaan pada musim hujan, dan berkurangnya pengisian cadangan air tanah. Hal tersebut menyebabkan terjadinya bencana banjir. Selain itu, rendahnya pengisian cadangan air tanah juga dapat menyebabkan kekeringan di musim kemarau. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk menyebarluaskan pengetahun tentang konsep tata kelola air yang baik dengan sistem drainase berwawasan lingkungan. Program ini terdiri dari dua kegiatan utama, yaitu sosialisasi dan pembuatan contoh implementasi teknologi konservasi air. Sosialisasi materi kegiatan dilakukan melalui penyebaran poster, sementara pembuatan contoh implementasi teknologi konservasi air dilakukan dengan pembangunan prototipe sumur resapan. Capaian telah didapatkan melalui kegiatan ini antara lain meningkatnya pengetahuan masyarakat setempat tentang konsep tata kelola air hujan berwawasan lingkungan, serta terbangunnya prototipe sumur resapan di tiga titik dalam Kawasan perumahan sebagai contoh aplikasi teknologi konservasi air hujan. Namun demikian, capaian dalam bentuk partisipasi aktif masyarakat secara langsung belum tercapai, karena adanya pembatasan fisik dalam situasi pandemi Covid-19
River Sedimentation Due to Tin Mining Activities in Bangka Island Hambali, Roby; Tae, Lee Sung; Bachtiar, Huda; Denansyah, Faisal Ilyas; Pamungkas, Aditya
Journal of the Civil Engineering Forum Vol. 10 No. 3 (September 2024)
Publisher : Department of Civil and Environmental Engineering, Faculty of Engineering, Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/jcef.14749

Abstract

Sedimentation in rivers is a major issue of environmental damage in the Kepulauan Bangka Belitung Province. In the last two decades, since tin mining was carried out by the community, massive sedimentation has occurred in the river. The purpose of the study is to investigate the characteristics of sediment materials and the effects of illegal tin mining on river sedimentation on Bangka Island. Sediment characteristics can be seen from the distribution of grain size and specific gravity of the bed sediment material and the concentration of suspended sediments seen from their position along the river. Sediment grain size is classified according to the American Geophysical Union. A total of 45 sediment samples spread across 12 rivers in the district capital area on Bangka Island were collected at the end of the rainy season in 2023, and 4 more samples were added in the dry season of 2023 in the Muntok River. The MPM formula was applied to estimate bedload transport and statistical methods were used to estimate suspended sediment rates. Additionally, the sedimentation rates are estimated based on dependable continuous flow with a probability exceeding 50% (Q50%). The study’s findings indicate that Illegal tin mining in Bangka Island has a major impact on river sedimentation. The particle size distribution of bed material sediments does not align with what is typically found in nature, which often exhibits coarser particles upstream and finer downstream. Similarly, in areas downstream of tin mining operations, the concentration of suspended particles increases significantly, up to 12 times higher than natural conditions.
Inventarisasi Kondisi Jaringan Irigasi pada Saluran Irigasi Bendung Metukul Kanan Daerah Irigasi Rias: Inventory of Irrigation Network Conditions in The Metukul Kanan Irrigation Channel-Rias Irrigation Area Frapas, Frapas Segara; Hambali, Roby; Sandy, Boy Dian Anugra
Jurnal Teknik Sumber Daya Air Vol. 5 No. 1 (Juni 2025)
Publisher : Himpunan Ahli Teknik Hidraulik Indonesia (HATHI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56860/jtsda.v5i2.134

Abstract

The Rias Irrigation Area is the largest irrigation area on Bangka Island. From 2020 to 2023, its irrigation channels have not been maintained, especially the right intake channel served by the Metukul Dam. Maintenance includes evaluating the condition and function of irrigation assets, including evaluating the structure of the channel, sluice gates, and measuring structures. The irrigation channel is 6,475 m long and has a service area of ​​4,202 Ha. The channel consists of nine segments that begin with sluice gates separating each segment. This study aims to inventory the condition and function of irrigation assets and determine the priority value of irrigation asset maintenance in the Rias Irrigation Area. The asset survey was carried out by tracing the irrigation network and identifying damage based on the condition assessment form. After that, the condition of the components was calculated according to the type of construction (Structure, sluice gate, measuring structure). The results of the inventory of irrigation assets in the Metukul Kanan channel show that the condition of the channel structure scored 4 (good), the condition of the water gate scored 3.7 (lightly damaged), the function of the channel structure scored 3.1 (good). The function of the water gate scored 3.7 (good). The calculation results of the irrigation assets condition scored 3.01 (lightly damaged), and the function value of irrigation assets scored 2.69 (poor). The condition and function values ​​of the measuring structure were scored 1 (severely damaged/bad) because no measuring structure was found in the irrigation channel. The function of the channel shows that the individual performance value of the network assets is 82% in the good performance category, with a damage index of 1.109% for the physical condition of the irrigation channel.
Co-Authors Aghata Christin Natalia Bachtiar, Huda Denansyah, Faisal Ilyas Djoko Legono Fadillah Sabri Frapas, Frapas Segara Irvani, Irvani Pamungkas, Aditya Rachmad Jayadi Riki Dwi Prastyo Riki Dwi Prastyo, Riki Dwi Sandy, Boy Dian Anugra Tae, Lee Sung Tia Anandhita, Tia Yayuk Apriyanti, Yayuk