Judul: Pemetaan Shelter dan Jalur Evakuasi Tsunami Studi Kasus: Kabupaten Bantul.
Abstrak: Terdapat potensi tsunami setinggi 20 meter yang dapat terjadi di sepanjang pesisir selatan Pulau Jawa. Bantul merupakan salah satu daerah yang rentan akan bencana tsunami tersebut sehingga diperlukan upaya mitigasi dalam bentuk dan pembuatan jalur evakuasi serta lokasi yang tepat dijadikan tempat evakuasi (shelter). Metode yang digunakan dengan bantuan aplikasi Sistem Informasi Geografis antara lain pemodelan inundasi tsunami, weighted overlay, dan network analysist dengan bantuan tools InaSafe. Hasil pemodelan inundasi tsunami menunjukkan tsunami ketinggian 10 meter menggenangi area seluas 9,72 km2, ketinggian 15 meter menggenangi area seluas 15,69 km2, dan ketinggian 20 meter menggenangi area seluas 21,29 km2. Kecamatan Kretek, Sanden, dan Srandakan terdampak oleh hasil pemodelan tsunami tesebut.. Terdapat 8940 penduduk terdampak tsunami run up 10 meter, 15060 penduduk untuk run up tsunami 15 meter, dan 23870 penduduk untuk run up tsunami 20 meter sebesar 23870 penduduk. Hasil pemodelan menunjukkan 41 rute evakuasi tsunami dengan 16 jalur yang dikategorikan sangat jauh, 3 jalur dikategorikan jauh, 14 jalur yang dikategorikan sedang, dan 5 jalur yang dikategorikan dekat, dan 3 jalur yang dikategorikan sangat dekat., There is a potential for a tsunami as high as 20 meters that could occur along the southern coast of Java Island. Bantul is one of the areas that is vulnerable to the tsunami disaster, so mitigation efforts are needed in the form and creation of evacuation routes and appropriate locations for evacuation (shelter). The methods used with the help of the Geographic Information System application include tsunami inundation modeling, weighted overlay, and network analysis with the help of InaSafe tools. The results of the tsunami inundation model show that a tsunami with a height of 10 meters inundated an area of 9.72 km2, a height of 15 meters inundated an area of 15.69 km2, and a height of 20 meters inundated an area of 21.29 km2. Kretek, Sanden and Srandakan sub-districts were affected by the results of the tsunami modeling. There were 8940 people affected by the 10-meter tsunami run-up, 15060 people for the 15-meter tsunami run-up, and 23870 people for the 20-meter tsunami run-up of 23870 people. The modeling results show 41 tsunami evacuation routes with 16 lanes categorized as very far, 3 routes categorized as far, 14 routes categorized as medium, 5 routes categorized as close, and 3 routes categorized as very close.
Keyword: inundation, network analysist, overlay, tsunami

Judul: Analisis Dampak Bencana Tsunami dan Perencanaan Jalur Evakuasi (Studi Kasus: Kabupaten Sukabumi)
Abstrak: Sukabumi dikategorikan wilayah rawan bencana yang dilintasi oleh Sesar Cimandiri sehingga menyebabkan gempa bumi yang dapat menimbulkan bencana lanjutan berupa tsunami dengan prediksi ketinggian mencapai 20 meter. Penelitian bertujuan mengetahui luasan wilayah dan penutup lahan terdampak, jumlah penduduk erdampak, serta perencanaan mitigasi yang diperlukan. Perhitungan dampak dilakukan dengan memodelkan inundasi ketinggian run-up tsunami 10m, 15m, dan 20m. Permodelan inundasi juga digunakan untuk mengetahui jumlah penduduk terdampak dengan aplikasi InaSafe dan QGIS. Informasi dari InaSafe digunakan untuk perencanaan lokasi shelter yang dapat memenuhi kapasitas serta jangkauan bagi penduduk terdampak tsunami. Hasil permodelan inundasi menunjukkan 9 kecamatan Sukabumi terdampak dengan total wilayah untuk skenario ketinggian run-up 10m, 15m, dan 20m berturut-turut seluas 6781,08 ha, 9703,75 ha, dan 12609,24 ha. Terdapat delapan jenis penutup lahan terdampak dengan kerugian ekonomi mencapai Rp. 3.158.526.457.779. Jumlah penduduk terdampak dari tiga skenario permodelan inundasi tersebut mencapai 135.100 jiwa sehingga perencanaan mitigasi didapatkan sebanyak 81 lokasi shelter darurat dengan 432 rute jalur evakuasi., Sukabumi is categorized as a disaster-prone area which is crossed by the Cimandiri Fault causing an earthquake which can cause a further disaster in the form of a tsunami with a predicted height of up to 20 meters. The research aims to determine the area and land cover affected, the number of affected people, and the necessary mitigation plans. The impact calculation was carried out by modeling the inundation of the tsunami run-up heights of 10m, 15m and 20m. Inundation modeling is also used to determine the number of people affected by the InaSafe and QGIS applications. Information from InaSafe is used for planning shelter locations that can meet the capacity and reach of tsunami-affected residents. The results of the inundation modeling show that 9 Sukabumi sub-districts are affected with a total area for the run-up height scenario of 10m, 15m and 20m, respectively 6781.08 ha, 9703.75 ha and 12609.24 ha respectively. There are eight types of affected land cover with economic losses reaching Rp. 3,158,526,457,779. The number of people affected from the three inundation modeling scenarios reached 135,100 people so that the mitigation plan obtained a total 81 location of emergency shelter locations with 432 evacuation route routes.
Keyword: tsunami, InaSafe, inundation, impact, mitigation

Judul: Characterizations of low alloy steel sae 4422  plated with chromic acid (Cro3)
Abstrak: Characterizations of low alloy steel SAE 4422 plated with chromic acid (CrOrO3) was use Optical Microscopy (OM), Scanning Electron Microscopy (SEM), X-Ray Diffraction (XRD), RD),Energy Dispersive Analysis of X-Ray (EDAX), Hardness Test and Roughness Test. Microstructures analysis exhibits cracks and grain boundaries microcracks as a characteristics of chrome metal found at plating metal. Perlite and Ferrite as grains of steel found at base metal with grain boundaries around it. Phase analysis of plating metal appropriate to chrome metal with lattice constant (a) is 2.559 Å and phase analysis of base metal appropriate to iron ferrite with lattice constant (a) is 3.318 Å. Both plating and base metal have cubic system. Chemical analysis of plating metal at surface section exhibits that cracks area have highest value of carbon element compare with grains and grains boundaries area. While chemical analysis of base metal at cross section exhibits that perlite have highest value of carbon element compare with ferrite and grain boundaries. The hardness value of plating metal at surface section and cross section are 753 and 637 VHN. While, the hardness value of base metal and interface area at cross section are 205 and 373 VHN. The roughness value at measurement points of chrome surface for as received sample are 0.445 μm. Observation used Optical Microscopy and Scanning Electron Microscopy exhibits surface irregularities combine to form surface texture of plating metal at surface section.
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