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All Journal Jurnal Mahasiswa Jurusan Teknik Pengairan Jurnal Ilmiah MITSU (Media Informasi Teknik Sipil Universitas Wiraraja) Jurnal Teknik Pengairan: Journal of Water Resources Engineering Jurnal Penelitian Pendidikan IPA (JPPIPA) EnviroScienteae Jurnal Kridatama Sains dan Teknologi Journal of Sustainable Civil Engineering (JOSCE) Jurnal Tecnoscienza Jurnal Sains dan Edukasi Sains Jurnal Teknologi dan Rekayasa Sumber Daya Air
Andre Primantyo Hendrawan
Jurusan Teknik Pengairan Fakultas Teknik Universitas Brawijaya
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Education Engineering Environmental Science Materials Science & Nanotechnology Mathematics Physics Social Sciences Transportation Other

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Analisa Laju Erosi dan Arahan Konservasi Lahan Menggunakan Aplikasi ArcMap Pada DAS Pekalen Hulu Kabupaten Probolinggo Jawa Timur Rastanto, Ridho Nur Aziz; Sisinggih, Dian; Hendrawan, Andre Primantyo
Jurnal Teknologi dan Rekayasa Sumber Daya Air Vol. 3 No. 1 (2023): Jurnal Teknologi dan Rekayasa Sumber Daya Air (JTRESDA)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtresda.2023.003.01.32

Abstract

Daerah Aliran Sungai (DAS) Pekalen yang terletak di wilayah administrasi Kabupaten Probolinggo, Provinsi Jawa Timur bermuara di Selat Madura dan bersumber dari Gunung Argopuro dan Gunung Lemongan yang mempunyai luas wilayah sekitar 1.696,17 km2 . Penyebab terjadinya banjir di Probolinggo pada tahun 2018 dan 2019 kemungkinan dikarenakan banyak terjadi penebangan pohon di hulu DAS Kali pekalen yang didominasi pohon sengon pada hutan masyarakat, selain juga diduga akibat perubahan tata guna lahan. Dengan adanya kejadian tersebut, maka diperlukan kajian erosi DAS Pekalen Hulu dengan outlet Bendung Pekalen serta meninjau tingkat bahaya erosi dan arahan rehabilitasi lahan dan konservasi tanah (ARKLT). Penelitian ini dilakukan dengan menggunakan metode USLE dan MUSLE, kemudian dibandingkan untuk mengetahui besarnya debit limpasan permukaan dan erosivitas di DAS Pekalen hulu, laju erosi, tingkat bahaya erosi, dan arahan rehabilitasi lahan dan konservasi tanah yang sesuai dengan kondisi DAS. Berdasarkan hasil analisis diketahui bahwa curah hujan rancangan periode ulang 1.01 dan 2 tahun masing-masing 82,27 mm 122,74 mm, dan total debit limpasan sebesar 48,35 m3/dt dan 72,13 m3/dt. Erosivitas hujan rata-rata tahunan Stasiun Hujan Condong sebesar 511,09 kJ/ha/tahun, Kertosuko 951,46 kJ/ha/tahun, Segaran 953,02 kJ/ha/tahun, dan Tiris sebesar 1069,86 kJ/ha/tahun. Erosi lahan metode USLE diperoleh sebesar 89,79 ton/ha/tahun, dengan SDR (Sedimen Delivery Ratio) menurut rumus Boyce, 1975 sebesar 11,72 % sehingga didapatkan SY (Sedimen Yield) sebesar 10,52 ton/ha/tahun. Erosi MUSLE dengan periode ulang 1.01 tahun rata-rata sebesar 5,75 ton/ha/tahun,untuk periode ulang 2 tahun rata-rata sebesar 9,03 ton/ha/tahun. Tingkat bahaya erosi didominasi oleh harkat erosi sangat tinggi dengan luas wilayah 6.693,08 ha (39,74 %), harkat erosi sedang dengan luas wilayah 5.051,82 ha (30 %), harkat erosi tinggi dengan luas wilayah 2.653,15 ha (15,75 %), dan harkat erosi rendah dengan luas wilayah 2.443,46 ha (14,51 %). Jadi dapat disimpulkan bahwa DAS Pekalen Hulu didominasi erosi sangat tinggi sebesar 39,74 %. Pola ARLKT yang dilakukan adalah memberikan kebijakan arahan penggunaan lahan yaitu, Kawasan Lindung dengan luas 5.094,76 ha (30,25 %), Kawasan Penyangga dengan luas 10.092,43 ha (59,93 %), dan Kawasan Budidaya dengan luas 1.654,31 ha (9,83 %). The Pekalen Watershed is located in the administrative area of Probolinggo Regency, East Java Province, which empties into the Madura Strait, originates from the springs of Mount Argopuro and Lemongan with an area of about 1.696,17 km2. The cause of the flooding in Probolinggo in 2018 and 2019 was probably due to the large amount of deforestation upstream of the Pekalen watershed, which is dominated by sengon trees in community forests, as well as suspected changes in land use. With this incident, it is necessary to study the erosion of the Upper Pekalen watershed at the outlet of the Pekalen Weir and review the erosion hazard level and recommendation for land rehabilitation and soil conservation (ARLKT). This research was conducted using the USLE and MUSLE methods, then compared to determine the amount of runoff and erosivity in the upstream Pekalen watershed, erosion rate, erosion hazard level, and the recommendation for land rehabilitation and soil conservation in accordance with watershed conditions. Based on the results of the analysis, it is known that the amount of surface runoff using the rational method, where with a design rainfall of 1,01 and 2 return periods respectively, 82,27 mm, 122,74 mm, obtained a total runoff discharge of 48,35 m3/s and 72,13 m3/s. The annual mean rainfall erosivity for each rain station is as follows: Condong Rain Station is 511,09 kJ/ha/year, Kertosuko is 951,46 kJ/ha/year, Segaran is 953,02 kJ/ha/year, and Tiris is 1.069,86 kJ/ha/year. Soil erosion using the USLE method was obtained at 89,79 tons/ha/year, with the SDR (Sediment Delivery Ratio) according to Boyce's formula (1975) of 11,72%, so that the SY (Sediment Yield) was 10,52 tons/ha/year. While MUSLE erosion with a return period of 1,01 years averaged 5,75 tons/ha/year, for 2-years return period is an average of 9,03 tons/ha/year. The erosion hazard level is dominated by very high erosion values with an area of 6.693,08 ha (39,74%), moderate erosion values with an area of 5.051,82 ha (30.00%), high erosion values with an area of 2.653,15 ha (15,75 %), and the erosion value is low with an area of 2.443,46 ha (14,51 %). So, it can be concluded that the Upper Pekalen watershed is dominated by very high erosion of 39,74%. The ARLKT pattern (Recommendation for Land Rehabilitation and Soil Conservation) carried out in the Upper Pekalen watershed is to provide a policy of directing land use, as follows. Protected Areas with an area of 5.094,76 ha (30.25 %), Buffer Areas with an area of 10.092,43 ha (59,93 %), Cultivation Areas with an area of 1.654,31 ha (9,83 %).
Identifikasi Karakteristik Fisik Dan Mineralogi Tanah Dan Batuan Material Longsoran Di Kecamatan Tugu Kabupaten Trenggalek Prasetyo, Erinna Melina; Hendrawan, Andre Primantyo; Yuliani, Emma
Jurnal Teknologi dan Rekayasa Sumber Daya Air Vol. 3 No. 1 (2023): Jurnal Teknologi dan Rekayasa Sumber Daya Air (JTRESDA)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtresda.2023.003.01.35

Abstract

Trenggalek Regency, East Java Province is located at coordinates 111º 24' - 112º 11' East Longitude and 7º 63' - 8º 34' South Latitude. The initial investigation of this material research was to test the physical properties of the soil at the locations on Trenggalek – Ponorogo road Km 15 and Km 17. The results of the sieve analysis test showed that Km 15 had a good gradation and Km 17 had a poor grain gradation. The specific gravity test of the two samples showed that the GS value = 2.6 – 2.7, which determines the material is silty sand with low plasticity. According to the AASHTO Classification Method, Km 15 and Km 17 samples are classified as soils with a code A-2-4, and from the USCS soil classification method the sample is classified as SW and SP. The samples were tested for slake durability and resulted Km 15 having high durability with Id2 = 83.7% and Km 17 low durability with Id2 = 33.2%. From the X-RD test Km 15 dominated by the mineral Laumontites by 32% and the X-RF results the sample dominated by Silica Oxide (SiO2) at 42.2%. The X-RD test of Km 17 showed the highest content, namely Albite at 46% and the X-RF test showed Silica Oxide (SiO2) compounds dominated with a value of 41.2%. from the SEM-EDX test results found that Km 15 and Km 17 materials contain elements of O, C, Si as the highest elements as the main constituent of soil samples. Kabupaten Trenggalek, Provinsi Jawa Timur terletak pada koordinat 111º 24’ - 112º 11’ BT dan 7º 63’ - 8º 34’ LS. Investigasi awal penelitian material longsoran ini yaitu uji sifat fisik tanah pada lokasi kelongsoran tebing jalan raya nasional Trenggalek-Ponorogo Km 15 dan Km 17. Hasil analisis saringan menunjukan Km 15 memiliki gradasi baik dan Km 17 memiliki gradasi butiran buruk. Uji specific gravity kedua sampel menunjukan bahwa nilai GS = 2,6 – 2,7 yaitu material berupa pasir berlanau dengan plastisitas rendah. Klasifikasi metode AASHTO diketahui sampel Km 15 dan Km 17 merupakan tanah dengan kode A-2-4, dan dari klasifikasi metode USCS sampel tanah memiliki kode SW dan SP. Pengujian slake durability dilakukan pada material batuan km 15 dan km 17 yang menghasilkan Km 15 memiliki durabilitas tinggi dengan Id2 = 83,7% dan Km 17 durabilitas rendah dengan Id2 = 33,2%. Uji X-RD dilakukan pada Km 15 dengan didominasi mineral Laumontite sebesar 32% dan hasil X-RF memiliki kandungan tertinggi Silika Oksida (SiO2) sebesar 42,2%. Uji X-RD pada Km 17 menampilkan hasil kandungan tertinggi yaitu Albite sebesar 46% dan uji X-RF menunjukan senyawa Silika Oksida (SiO2) mendominasi dengan nilai 41,2%. SEM-EDX didapati material Km 15 dan Km 17 mengandung unsur O, C, Si sebagai unsur tertinggi sebagai pembentuk utama sampel tanah.
Perbandingan Hasil Stabilisasi Menggunakan Volcanic Ash dan Kapur Pada Tanah Ekspansif di Kawasan Citraland Surabaya Ramadhanti, Banyu Bening; Hendrawan, Andre Primantyo; Asmaranto, Runi
Jurnal Teknologi dan Rekayasa Sumber Daya Air Vol. 4 No. 1 (2024): Jurnal Teknologi dan Rekayasa Sumber Daya Air (JTRESDA)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.jtresda.2024.004.01.011

Abstract

Lempung ekspansif adalah jenis tanah problematik karena mudah mengembang dan menyusut akibat perubahan kadar air tanah. Struktur perkerasan jalan, gedung dan jembatan yang dibangun di atas tanah jenis ini akan mengalami kerusakan atau keruntuhan. Untuk meningkatkan daya dukung dan kekuatannya, proses perbaikan tanah berupa stabilisasi telah sering digunakan. Pada studi ini, material abu vulkanik (volcanic ash) dari Gunung Kelud dan bubuk kapur komersial digunakan sebagai stabilizer untuk meningkatkan karakteristik kekuatan lempung ekspansif yang diambil dari wilayah barat kota Surabaya, Provinsi Jawa Timur Indonesia. Di laboratorium, benda uji eksperimental diambil dengan cara menyampurkan 15% bahan volcanic ash dan kapur dengan tanah ekspansif untuk mengevaluasi pengaruhnya terhadap kuat tekan bebasnya (unconfined compression strength, UCS). Nilai kadar air optimum (OMC) dan kepadatan kering maksimum (MDD) didapat dari pemadatan Standard Proctor. Dari hasil penelitian dapat ditunjukkan bahwa volcanic ash dan kapur mampu menurunkan harga indeks plastisitas lempung ekspansif. Peningkatan tertinggi nilai UCS diamati pada benda uji yang distabilisasi dengan 15% volcanic ash. Pada proses pemadatan, penambahan volcanic ash dan kapur dapat meningkatkan kepadatan kering maksimum tetapi menurunkan kadar air optimum dari benda uji lempung ekspansif.
Flood Prone Area Analysis in the Wonosari Sub Watershed, Bondowoso Regency, East Java Aditama, Dimas Hafiz; Harisuseno, Donny; Hendrawan, Andre Primantyo
Jurnal Penelitian Pendidikan IPA Vol 11 No 5 (2025): May
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i5.11130

Abstract

Bondowoso Regency is known as a region highly susceptible to flood disasters. Factors contributing to the increased flood risk include the hydrological and topographical conditions present in the study area. Therefore, it is essential to identify and map areas that are vulnerable to flooding. Flood vulnerability is influenced by several parameters, including rainfall, soil type, land use, slope gradient, surface runoff, and elevation. The data used in this study were obtained from UPT PSDA WS Sampean, covering the period from 2013 to 2023. These parameters were processed using a weighting and scoring method. The assignment of scores and weights was based on the influence of each parameter on flood vulnerability, with each parameter assigned an equal value ranging from 1 to 5. An overlay analysis was then performed to generate a flood vulnerability map. The resulting vulnerability levels were classified into five categories: very low, low, moderate, high, and very high. The results show that the majority of flood-prone areas fall within the "high" vulnerability category, covering approximately 250.18 km² or about 41% of the total area of the Wonosari Sub-watershed. This finding can be validated by historical events in 2023, during which several flash floods were recorded.
Bahasa Inggris Bahasa Inggris Martius, Alifa Fajriani; Yuliani, Emma; Hendrawan, Andre Primantyo; Dermawan, Very
Jurnal Penelitian Pendidikan IPA Vol 11 No 11 (2025): November: In Progress
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i11.12615

Abstract

This study investigates groundwater flow and nitrate transport in the Kasin Sub-watershed, Malang City, using Visual MODFLOW integrated with the MT3DMS module. Hydrogeological and geoelectrical data, groundwater levels, and nitrate concentration measurements (110 ppm) were used as model inputs. A transient simulation over 3,600 days (±10 years) was conducted to analyze plume migration. The results show that groundwater flow follows topographic gradients, moving from upland recharge zones to lowland discharge zones, with an average velocity of 0.25–0.40 m/day. The nitrate plume migrated southward, extending ±600–700 m horizontally and reaching ±25 m in depth. High concentrations (>100 ppm) remained near the source, while concentrations decreased to 20–40 ppm at greater distances due to advection and dispersion. Vertical sections indicated plume penetration into deeper aquifers, influenced by hydraulic pressure differences between strata, while permeable sandy and pumice tuff layers facilitated migration and clay acted as aquitards. These findings highlight the persistent nature of nitrate contamination, the role of aquifer heterogeneity, and the vulnerability of groundwater in urban catchments. In conclusion, nitrate pollution poses long-term risks to groundwater quality, emphasizing the importance of monitoring networks, aquifer protection policies, and improved land-use management to mitigate further contamination.
The Effect of Groundsills on the Degradation and Aggradation Processes of the Parit Raya Riverbed Andriantari, Nur Fadhlillah; Andawayanti, Ussy; Hendrawan, Andre Primantyo; Putra, Farhan Akbar Darma
Jurnal Teknik Pengairan: Journal of Water Resources Engineering Vol. 16 No. 2 (2025)
Publisher : Fakultas Teknik, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.pengairan.2025.016.02.8

Abstract

Parit Raya is part of the drainage system of the Ngasinan River in Trenggalek and Tulungagung regencies. It is designed to reduce flooding and manage waterlogging caused by the construction. However, in the rainy season, the high flow velocity often causes damage to groundsills, triggering riverbed degradation or aggradation. This study aims to analyze the degradation and aggradation phenomena in Parit Raya River and the effect of two groundsill to reduce these actions using Hydrologic Engineering Center’s River Analysis System (HEC-RAS) simulations. The flow and sediment dynamics analysis uses Meyer Peter Müller (MPM), Engelund Hansen, and Laursen Copeland methods. The research locations focus on three river sections, consisting of 74 cross-sections, with two groundsills. By using the MPM, Englund-Hansen, and Laursen-Copeland methods modeled in HEC-RAS 6.0.0 software, this study can help in evaluating the effectiveness of groundsills in controlling sediment, preventing excessive erosion, and maintaining the stability of other hydraulic structures in rivers. The analysis reveals that conditions upstream of the groundsill tend to experience aggradation due to sediment deposition in STA 120, STA 103.60, and STA. 79.40, downstream conditions are characterized by degradation, indicated by riverbed erosion resulting from increased flow velocity between STA 120 and STA 47. Among the methods applied, the MPM and Engelund-Hansen methods provided results that closely align with field conditions compared to the Laursen-Copeland method.
Co-Authors Aditama, Dimas Hafiz Adristi Nur Camila Ahmad Firman Nur Rachman Allaudin, Dhiya Ulhaq Andriantari, Nur Fadhlillah Aristantha, Fatan Astari, - - Atikah, Dewi Awaludin, Muhammad Fajar Dian Sisinggih Donny Harisuseno Dwi Lestari, Febby Sekar Dzakiyyah, Nailah Emma Yuliani Fathurrahman, Alfa Anshori Firmanda, Andry Riski Firmanda, Rifco Ray hari siswoyo Heri Suprijanto Ilham Ali Islami, Fikry Asri Jadfan Sidqi Fidari Khairi, Muhammad Ariq Fathyan Ma'arif, Mohammad Syaifuddin Martius, Alifa Fajriani Maulina, Chatherine Grace Miasari, Putu Kalila Shevanya Mohammad Fauzi Nimanto, Aji Prakoso Nisa Andan Restuti, Nisa Andan Nisa, Reyza Kusvahrun Nuari, Fianda Hifqi Sandar Pitojo Tri Juwono Prasetyo, Erinna Melina Putra, Farhan Akbar Darma Putra, Rengga Pratama Ramadhanti, Banyu Bening Rastanto, Ridho Nur Aziz Rispiningtati Rispiningtati Roisa Tri Amini Rosdiyono, Anangga Rubiantoro, Prasetyo Runi Asmaranto Sanwa, Niken Wibasari Setiawan, Ribut Sucahya, Mohammad Ary Suhardjono Suhardjono Suwanto Marsudi Tri Budi Prayogo, Tri Budi Ussy Andawayanti Very Dermawan Wardani, Annida Shafira Yuliani, Emma -