Judul: Pemetaan Area Terdampak Tsunami Menggunakan Sistem Informasi Geografis di Pesisir Kabupaten Kebumen
Abstrak: Kabupaten Kebumen merupakan salah satu daerah yang berpotensi tinggi terjadi gempa bumi dan tsunami karena letaknya yang berada tepat di atas zona subduksi lempeng Indo-Australia dengan lempeng Eurasia. Penelitian ini bertujuan untuk memetakan daerah terdampak dan menganalisis tingkat bahaya tsunami menggunakan sistem informasi geografis di wilayah pesisir Kabupaten Kebumen dengan tiga skenario ketinggian tsunami, yaitu 5,6 meter, 10 meter, dan 31,6 meter. Peta tingkat bahaya tsunami dibuat dengan metode Berryman dengan menggunakan beberapa dataset, yaitu garis pantai, kemiringan lereng, penggunaan lahan, koefisien kekasaran permukaan, dan ketinggian tsunami di garis pantai. Dalam penelitian ini, tingkat bahaya tsunami diklasifikasikan menjadi tiga kelas berdasarkan daerah yang tergenang, yaitu tinggi (>3 meter), sedang (1-3 meter), dan rendah (<1 meter). Hasil analisis spasial menunjukkan bahwa 8 kecamatan di Kabupaten Kebumen diprediksi akan tergenang dengan tiga skenario genangan yang berbeda. Skenario ini mencakup kedalaman genangan 5,6 meter, 10 meter, dan 31,6 meter, yang menghasilkan area yang berpotensi terkena dampak masing-masing seluas 1.938,2 hektare, 3.608,7 hektare, dan 9.587 hektare. Kecamatan Puring diidentifikasi memiliki potensi genangan terbesar., Kebumen Regency is one of the areas with a high potential for earthquakes and tsunamis because of its location right above the subduction zone of the Indo Australian plate with the Eurasian plate. This study aims to map the affected areas and analyze the tsunami hazard level using a geographic information system in the coastal area of Kebumen Regency with three tsunami height scenarios, namely 5,6 meters, 10 meters, and 31,6 meters. Tsunami hazard maps were derived from the Berryman method using several datasets, namely coastline, slope, land use, surface roughness coefficient, and tsunami height on the coastline. In this study, tsunami hazard levels were classified into three classes based on inundated areas, namely high (>3 meters), medium (1-3 meters), and low (<1 meter). Spatial analysis results revealed that 8 sub districts within Kebumen Regency were predicted to be inundated under three different inundation scenarios. These scenarios include inundation depths of 5.6 meters, 10 meters, and 31.6 meters, resulting in potentially affected areas of 1,938.2 hectares, 3,608.7 hectares, and 9,587 hectares, respectively. Puring District was identified as having the greatest potential inundation area
Keyword: metode berryman, tsunami, peta bahaya, SIG, skenario tsunami

Judul: Analysis of Tsunami's Vulnerability Level and Mitigation Study Case: Tasikmalaya Regency's Coast
Abstrak: Kondisi geografis dan geologis menjadikan Indonesia rawan terhadap bencana tsunami. Salah satu wilayah pesisir yang memiliki potensi terjadinya tsunami adalah Pesisir Kabupaten Tasikmalaya. Berdasarkan hal tersebut, diperlukan adanya analisis tingkat kerawanan dan upaya mitigasi tsunami dengan tujuan memperkirakan luas wilayah yang terdampak tsunami, menganalisis tingkat kerawanan tsunami, memperkirakan jumlah penduduk yang terdampak, memetakan shelter dan jalur evakuasi tsunami, serta merencanakan upaya mitigasi struktural tsunami. Metode yang digunakan, tool model builder, weighted overlay, InaSAFE, dan Network Analyst. Hasil pemodelan menunjukkan tsunami setinggi 10, 15, dan 20 meter dapat menggenangi wilayah seluas 12,25 km2, 18,47 km2, dan 24,69 km2. Wilayah Pesisir Kabupaten Tasikmalaya didominasi oleh tingkat kerawanan rendah sebesar (54,62%), kemudian tingkat kerawanan sangat rendah (26,25%), tingkat kerawanan sedang (12,61%), tingkat kerawanan tinggi (5,30%), dan tingkat kerawanan sangat tinggi (1,22%). Jumlah penduduk terdampak tsunami setinggi 10, 15, dan 20 meter adalah sebanyak 8.280, 12.320, dan 17.770 orang. Terdapat 59 jalur evakuasi, dimana jalur yang termasuk kategori sedang sebanyak 27 jalur, kategori dekat 14 jalur, kategori sangat dekat dan jauh masing-masing sebanyak 9 jalur. Upaya mitigasi struktural yang dilakukan adalah dengan membuat green belt dan sea wall yang efektif mereduksi tsunami dengan tinggi di bawah 15 meter., Geographical and geological conditions make Indonesia vulnerable to tsunami disasters. One of the coastal areas that has the potential for a tsunami is Tasikmalaya Regency’s Coast. It is necessary to analyze tsunami’s vulnerability and mitigation to describing the area affected by the tsunami, analyzing the level of tsunami vulnerability, estimating the number of people affected, mapping shelters and tsunami exit routes, and planning structural tsunami mitigation. Methods used, model builder, weighted overlay, InaSAFE, and Network Analyst. The results show that tsunami as high as 10, 15 and 20 meters can inundate areas of 12,25 km2, 18,47 km2 and 24,69 km2. Tasikmalaya Regency’s Coast is dominated by a low level of vulnerability (54,62%), then a very low level of vulnerability (26,25%), a medium level of vulnerability (12,61%), a high level of vulnerability (5,30%), and a very high level of vulnerability (1,22%). The number of people affected by tsunamis as high as 10, 15 and 20 meters was 8.280, 12.320 and 17.770 people. There are 59 exit routes, which there are 27 routes in the medium category, 14 routes in the near category, and 9 routes in the very near and far categories. The structural mitigation efforts carried out are by creating a green belt and sea wall which are effective in reducing tsunamis with a height of below 15 meters.
Keyword: kerawanan, mitigasi, tsunami, inundasi

Judul: Sintesis Flavonol melalui 2’-Hidroksikalkon
Abstrak: Flavonol is a class of flavonoids commonly found in fruits and vegetables. Flavonol is very useful, especially in food sector and health. In this study, flavonol unsubstituted was successfully synthesized from an intermediate material 2’-hydroxychalcone. The 2’-hydroxychalcone was synthesized by Claisen-Schmidt condensation method between o-hydroxyacetophenone and benzaldehyde using 4 different catalysts, namely KOH 60%, solid pellet of KOH-grinding technique, BF3-Et2O, and NaH in DMF. The KOH 60% was the best catalyst, giving the highest yield (57%). Afterward, the flavonol was synthesized in 1-stage oxidation cyclization of o-hydroxyacetophenone using Algar-Flynn-Oyamada (AFO) reaction, giving 76%. The flavonol total yield from 2’-hydroxychalcone was 43%. All synthesized products were characterized by their melting points and their spectra. The success of the synthesis flavonol opens the way to synthesis of useful flavonol derivatives such as quercetin and kaempferol.
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