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All Journal IPTEK Journal of Proceedings Series Jurnal Media Gizi Indonesia (MGI) Jurnal Aplikasi Teknik Sipil Jurnal Hidroteknik Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Chimica Didactica Acta : Journal of Chemistry and Chemistry Education
Nastasia Festy Marginia
Institut Teknologi Sepuluh Nopember
Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Engineering Health Professions

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ANALYSIS OF SEDIMENTATION TRENDS IN EFFORTS FOR SUSTAINABILITY AT WONOREJO RESERVOIR Novi Andriany Teguh; Nastasia Festy Marginia
Chimica Didactica Acta Vol 9, No 2: December 2021
Publisher : FKIP USK

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (186.422 KB) | DOI: 10.24815/jcd.v9i2.25097

Abstract

Sedimentation is a natural problem that always occurs in water structures, especially dams and reservoirs. Wonorejo Reservoir as a multipurpose reservoir also experienced this. Sedimentation can affect the performance of reservoirs and dams. With the accumulation of sediment, the volume of the reservoir will change from time to time, so it is necessary to estimate the volume of sediment during the useful life of the reservoir and dam, so that they can function optimally. In addition, efforts are also needed to deal with the sedimentation. This study was conducted to estimate the volume of sediment that can occur during the useful life of reservoirs and dams, which is 50 years. Using limited data from previous studies, the study was carried out using the literature study method from other studies that have been carried out in other reservoirs and dams in Indonesia. Based on the estimation results, it is estimated that the volume of sediment in the Wonorejo Reservoir at the end of its age will reach 17.6% of the reservoir capacity volume. So it can be concluded that the reservoir can still work optimally. However, these results are not accurate enough due to the limited data available so that proper sedimentation management efforts are still needed. These countermeasures can be adopted from what has been suggested in other studies for reservoirs and dams in Indonesia.
Prediksi dan Pemetaan Kekeringan Menggunakan Metode Thomas Fiering dan Standartdized Precipitation Indexs (SPI) di Kabupaten Tuban Made Indrayana Supriyatna; Anak Agung Ngurah Satria Damar Negara; Nastasia Festy Margini
Jurnal Aplikasi Teknik Sipil Vol 21, No 3 (2023)
Publisher : Departemen Teknik Infrastruktur Sipil Institut Teknologi Sepuluh Nopember Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j2579-891X.v21i3.17239

Abstract

Pada bulan Oktober 2021 tedapat berita yang menyebutkan bahwa 9 kecamatan di Kabupaten Tuban terdampak kekeringan. Kabupaten Tuban merupakan daerah rawan terjadi kekeringan sehingga perlu dilakukan analisa serta prediksi kekeringan pada daerah tersebut. Standardized Precipitation Index (SPI) adalah metode untuk mengukur indeks kekeringan dengan menggunakan data curah hujan. Analisa kekeringan dilakukan dengan melakukan validasi antara kondisi kekeringan pada bulan Oktober 2021 terhadap hasil analisa SPI yang telah dipetakan menggunakan aplikasi Geographic Information System (GIS). Hasil validasi menunjukan SPI masih dalam kategori normal, yang berarti curah hujan bukan faktor utama terjadinya kekeringan. Untuk prediksi kekeringan dilakukan hingga 2030 sebagai implementasi SDG’s dengan memanfaatkan metode thomas fiering untuk memprediksi curah hujan.  Hasil prediksi permodelan thomas fiering tidak dapat digunakan secara mentah karena dari hasil uji eror training dan validasi menggunakan RMSE tergolong tinggi secara timeseries, tetapi bagus secara probabilistik dimana untuk tahun 2022 sampai 2030 memiliki indeks dengan kategori normal.
Channel Capacity Evaluation Model Using Storm Water Management Model Yang Ratri Savitri; Satria Damarnegara; Mahendra Andiek Maulana; Umboro Lasminto; Novi Andriany Teguh; Nastasia Festy Margini
Civilla : Jurnal Teknik Sipil Universitas Islam Lamongan Vol 9 No 2 (2024): SEPTEMBER
Publisher : Program Studi Teknik Sipil, Fakultas Teknik, Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/cvl.v9i2.1315

Abstract

Floods commonly occur in big cities with huge population densities. The increasing population number can cause a decrease in open land and green open space areas. It increases the surface runoff and induces inundation due to inadequate channel capacity. Therefore, a better design is required to minimize the inundation depth and area. This research aims to evaluate the drainage capacity of the channel dimension based on the flood discharge obtained from the rational method. The cross-section capacity was evaluated using the Storm Water Management Model by considering two types of rainfall distribution. The simulation result shows that the rainfall distribution influences the channel capacity. The flood discharge based on the Sri Harto distribution has a lower peak discharge than the Tadashi Tanimoto distribution. The result shows the significant effect of rainfall distribution types on the water depth. Therefore, it is necessary to determine the rainfall distribution method that represents the watershed characteristics used to design the drainage system. 
Co-Authors Anak Agung Ngurah Satria Damar Negara Anindita Hanalestari Setiawan Anwar, Nadjadji Danayanti Azmi Dewi Nusantara Danayanti Azmi Dewi Nusantara Eddy Setiadi Soedjono Feriza Nadiar I Gede Tunas Lutfy Risfiyanto Made Indrayana Supriyatna Maulana, Mahendra Andiek Mohamad Bagus Ansori Mohamad Fajrin Hernata Mukodi Mukodi Novi Andriany Teguh Nusantara, Danayanti Azmi Dewi Rahmawati, Deti Risma Lupita Sari Satria Damarnegara Soedarso Soedarso Umboro Lasminto Yang Ratri Savitri