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The Implementation of Water Sensitive Urban Drainage to Overcome the Risk of Flooding in Malang City Yani, Dandy Achmad; Suwignyo, Suwignyo; Darmawan, Azhar Adi; Nissa, Khoirin
BERKALA SAINSTEK Vol 12 No 3 (2024)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v12i3.47437

Abstract

This study aims to apply Water Resources Urban Design (WSUD) technology to improve water quantity and quality in the Brantas River Watershed (DAS), especially in Oro-Oro Dowo Village, Malang City. This village was chosen because several drainage channels have decreased efficiency in accommodating water runoff during the rainy season. The application of WSUD technology is expected to reduce the high surface runoff due to the decrease in water absorption areas, so this can be an alternative to conserving the availability of water resources in terms of quantity and quality. The modeling scenarios are arranged into two types. In the first scenario, the model is made without the application of WSUD, while in the second scenario, WSUD technologies are applied. There are permeable pavement, bioretention, constructed wetlands, and green roofs. The methodology used for the application of the WSUD concept is through the SWMM (Storm Water Management Model) program. The application of WSUD technology in the case study in Oro-Oro Dowo Village is planned along the sidewalks on Jalan Rinjani, Jalan Jakarta/Jalan Simpang Ijen, Jalan Besar Ijen, and Jalan Panggung, as well as green open spaces/city forests located in the administrative area of the village. The results of this study are in the form of a comparison of the total surface water runoff before and after the implementation of WSUD for each technology. As a result, green roof technology has the potential to reduce surface runoff higher than other technologies. However, the obstacles in the application of green roofs are the cost and roof leaks. Thus, the application of a combination of permeable pavement, bioretention, and constructed wetlands can be another option. The results of the application of the WSUD combination reached 96.88%.
Penggunaan Data Curah Hujan Satelit Global Precipitation Measurement (GPM) Untuk Analisa Hidrologi Perencanaan Embung di Indonesia Yani, Dandy Achmad; Abduh, Moh; Darmawan, Azhar Adi; Suwignyo, Suwignyo
Jurnal Ilmiah Universitas Batanghari Jambi Vol 26, No 1 (2026): Februari
Publisher : Universitas Batanghari Jambi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33087/jiubj.v26i1.6420

Abstract

Indonesia is committed to supporting national strategic programs, one of which is food self-sufficiency. Therefore, to achieve optimal irrigation during the dry season, planning for reservoir construction is necessary. One crucial analytical activity in reservoir planning is hydrological analysis. This analysis determines the structural design requirements and the extent of the reservoir's irrigation benefits, provided sufficient data is available. Unfortunately, rainfall data from observation posts is sometimes incomplete, necessitating the use of satellite rainfall data. This study aims to analyze the potential use of Global Precipitation Measurement (GPM) satellite rainfall data as a primary source of hydrological analysis for reservoir planning, particularly in determining the design flood discharge for the return period. The limited availability of observed rainfall data in Indonesia is a major obstacle in the water structure planning process, particularly in rural areas and upstream river basins (DAS).
Model Debit Puncak Banjir Berdasarkan Faktor Bentuk DAS untuk Sungai-Sungai di Sulawesi Selatan Yani, Dandy Achmad; Suhartanto, Ery
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 4, No 1 (2019): EDISI MARET 2019
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (474.302 KB) | DOI: 10.33366/rekabuana.v4i1.1064

Abstract

ABSTRAKKurangnya ketersediaan data hidrograf merupakan kendala bagi perencanaan bangunan air. Kendala ini menjadikan model-model HSS akan memberikan manfaat yang cukup besar. Idealnya setiap DAS mempunyai Hidrograf Satuan dengan ciri tertentu. Studi ini bertujuan untuk mengamati karakteristik hidrograf pengamatan di tiap DAS dan semua DAS di Propinsi Sulawesi Selatan. Tujuan utama studi ini adalah membuat rancangan Model Hidrograf Satuan Sintetis antara lain persamaan debit puncak banjir (Qp) dan waktu mencapai puncak banjir (Tp) yang antara lain merupakan fungsi dari luas DAS (A), panjang sungai terpanjang (L), dan faktor bentuk DAS. Faktor bentuk DAS merupakan rasio dari keliling (K) dan luas area (A) DAS. Analisis model menggunakan regresi dengan berbagai alternatif. Hasilnya permodelan hidrograf satuan sintetis (HSS) dengan variabel luas DAS (A), panjang sungai terpanjang (L), dan faktor bentuk DAS (FD) dan tentunya sesuai dengan kriteria dari koefisien determinasi, diharapkan mempunyai sensitivitas yang cukup tinggi. Faktor bentuk DAS (FD) diharapkan mempunyai hubungan linear dengan parameter hidrograf satuan sintetis.Kata kunci: debit puncak banjir, waktu mencapai puncak, luas DAS, panjang sungai terpanjang, faktor bentuk DAS  ABSTRACTThe lack of hydrograph data availability is an obstacle for water building planning. This constraint makes HSS models will provide considerable benefits. Ideally each watershed has a Hydrograph Unit with certain characteristics. This study aims to observe the hydrograph characteristics of observations in each watershed and all watersheds in South Sulawesi Province. The main objective of this study is to design a Synthetic Unit Hydrograph Model, including the peak flood discharge equation (Qp) and the time to reach the flood peak (Tp), which among others is a function of the watershed area (A), longest river length (L), and form factor Watershed. The watershed form factor is the ratio of perimeter (K) and area (A) of the watershed. Model analysis uses regression with various alternatives. The result is synthetic unit hydrograph modeling (HSS) with a broad variable watershed (A), longest river length (L), and DAS (FD) form factor and of course according to the criteria of the coefficient of determination, it is expected to have a high enough sensitivity. The DAS (FD) form factor is expected to have a linear relationship with the parameters of synthetic unit hydrographs.