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Nanik Setyowati
University of Bengkulu
Religion Arts Humanities Biochemistry, Genetics & Molecular Biology Economics, Econometrics & Finance Education Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Mathematics Physics Social Sciences Transportation Other

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Journal : Jurnal Riptek

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Analisis Banjir Genangan di Kawasan Tembalang dan Sekitarnya Sidiq, Wahid Akhsin Budi Nur; Hanafi, Fahrudin; Priakusuma, Dwi; Haruman, Willar; Sumarso, Muhammad Yunan; Setyowati, Nanik
Jurnal Riptek Vol 16, No 2 (2022)
Publisher : Badan Riset dan Inovasi Daerah Kota Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (766.444 KB) | DOI: 10.35475/riptek.v16i2.159

Abstract

Semarang City has a low and flat topography in several areas so that it has a high risk of inundation during the rainy season with a spatial distribution in the city center area. In 2022 inundation floods have inundated 877.66 hectares, one of which is in the Tembalang area and its surroundings with a height of around 275 MDPL which occurred in 20 locations with an area of around 33.62 hectares, where the area is the downstream part of the Babon Watershed. The results of the analysis of rain in the Babon watershed area for 20 years show that it is relatively stable, not too much variation, where the results of calculating the rational flood discharge for 2022 with a return period of 2 years are around 25.80 m³/s. Furthermore, the morphometric analysis of the watershed shows that the shape of the Babon watershed is relatively elongated with a circularity ratio <0.50, the density index of the river is 0.25 – 10 km/km² which is in the medium density category with a relatively long Time Concentration (TC) of around 3.2 hours so that it is less thus impacting flooding downstream. The Babon watershed runoff coefficient is affected by land cover conditions, where the interpretation results show that there was a change in land cover from 2002 – 2022 for the area of built-up land which increased by 708.44 hectares and the vegetation area decreased by 486.77 hectares. Analysis of channel capacity shows that there is potential for overflow from existing channels in 7 sub-watersheds which will result in inundation. The conclusion of this study shows that rainfall over the past 20 years has been relatively stable and the morphometry of the watershed has not had much impact on downstream flooding, the main river capacity of the Babon DAS is still sufficient to accommodate the planned flood discharge with a return period of 25 years. So that inundation that occurs is more caused by changes in land cover and drainage capacity in the downstream. 
Kajian Rencana Pengembangan Desain Kebun Raya Tinjomoyo Kota Semarang Rahayuningsih, Margareta; Sidiq, Wahid Akhsin Budi Nur; Wicaksono, Dimas; Widodo, Agus Ananto; Setyowati, Nanik
Jurnal Riptek Vol 18, No 1 (2024)
Publisher : Badan Riset dan Inovasi Daerah Kota Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35475/riptek.v18i1.247

Abstract

Semarang City has a fairly complete biodiversity ranging from genetic, species, and ecosystem levels. In addition, some of the plants identified are related to the historical value and local wisdom of Semarang City. However, the existence of some of these plants is currently threatened by the massive development of Semarang City and the reduction of green spaces. One of the solutions to conserve plants and maintain green spaces in Semarang City is through the development of Tinjomoyo Botanical Garden. The purpose of the study is to develop a design for the development of Tinjomoyo Botanical Garden in accordance with the ecoregion of Semarang City which is included in the East Java Rainforest with the concept of techno park. The design of the Tinjomoyo Botanical Garden is done through zoning arrangements that refer to the Semarang City Ecoregion which is included in the East Java Rainforest. The study results show zone IV with an area of about 10.04 hectares which is the zone with the highest level of suitability for the development of Tinjomoyo Botanical Garden. The arrangement of the botanical garden area, including the reception zone, management zone, collection zone, and recreation zone. In the collection zone 135 plant species as the initial collection of Tinjomoyo Botanical Garden, with a total of 1,834 individuals or collections divided into 8 categories, including historical plants, fruit plants, rare plants, endemic plants, aromatic plants, medicinal plants, forest zones and ornamental plants. Tinjomoyo Botanical Garden is planned to be built within the next 5 years in stages according to the urgency of development in each zone. Suggestions given in the development of Tinjomoyo Botanical Garden needs involvement, coordination, and cooperation with various sectors in order to develop and continue.
Co-Authors Affandi, Mohamad Arif Agus Ananto Widodo, Agus Ananto Anwar, Ahmad Jauhari Azizah, Suci Midsyahri DIMAS WICAKSONO Fahrudin Hanafi, Fahrudin Haruman, Willar Hidayatulloh, Ma'ruf Ikhsan, Nur Imam, Al Nur Khoiri, Muih Hamim Miftahul Khoiriyah, Wafik Nurul KHOIRUL ANAM Kirom, Ahmad Kusuma, Eka Kuswati, Ria Margareta Rahayuningsih Nugroho Edi K Murdianto Murdianto, Murdianto Ngaisah, Siti Nurul Malikah Oktavia, Dyah Fajrika Pernama, Candra Priakusuma, Dwi PUDJI ASTUTI Purwaningsih, Novi Putra, Wahyu Hanafi Ramadhani, Rifky Kamila Samsudin Samsudin Sholihah, Abdah Munfaridatus Siti Munawaroh Suhartini, Endang Sumani . Sumarso, Muhammad Yunan Wahid Akhsin Budi Nur Sidiq, Wahid Akhsin Budi Nur Wijayanti, Lisma Meilia