Judul: Application of Geographic Information System for Determining Priority Areas for Flood Handling and Evacuation Paths for Flood Victims (Case Study: Alalak District, Barito Kuala Regency, South Kalimantan Province)
Abstrak: Akibat dari bencana banjir pada Januari 2021 banyak penduduk Kecamatan Alalak yang perlu dievakuasi dengan cepat dan aman menuju tempat pengungsian. Tujuan dari penelitian ini adalah mengetahui daerah rawan banjir, menentukan daerah prioritas banjir, mengidentifikasi sebaran lokasi evakuasi banjir, dan memberi rekomendasi jalur evakuasi. Metode penelitian menggunakan pendekatan deskriptif kuantitatif. Pengolahan data berbasiskan data spasial dengan menggunakan komponen Sistem Informasi Geospasial (SIG). Analisis daerah rawan banjir mengacu pada SNI 8197:2015. Penentuan daerah prioritas banjir dilakukan dengan meng-overlay hasil analisis rawan banjir dengan data kependudukan. Perencanaan jalur evakuasi menggunakan network analyst dengan memanfaatkan hasil analisis daerah rawan banjir untuk menentukan sebaran lokasi evakuasi. Hasil penelitian ini menunjukkan Kelurahan Handil Bakti dan Desa Semangat Dalam menjadi daerah prioritas banjir karena masuk prioritas 1. Berdasarkan pemerosesan network analyst, dihasilkan 20 jalur evakuasi di Kelurahan Handil Bakti yang menghubungkan 20 jalur evakuasi dengan dua titik pengungsian dan dihasilkan lima jalur evakuasi di Desa Semangat Dalam yang menghubungkan lima titik kumpul dengan satu titik pengungsian., As a result of the flood disaster in January 2021, many residents of the Alalak sub-district need to be evacuated quickly and safely to a refugee camp. This study aims to identify flood-prone areas, determine priority areas for flooding, identify the distribution of flood evacuation locations, and provide recommendations for evacuation routes. The research method uses a quantitative descriptive approach. Data processing is based on spatial data using the Geospatial Information System (GIS) components. Analysis of flood-prone areas refers to SNI 8197:2015. Determination of flood priority areas is done by overlaying the results of the flood-prone study with population data. Evacuation route planning uses a network analyst by utilizing the results of an analysis of flood-prone areas to determine the distribution of evacuation locations. The results of this study indicate that Handil Bakti Village and Semangat Dalam Village are priority flood areas because they are prioritized 1. Based on network analyst processing, 20 evacuation routes are generated in Handil Bakti Village, which connects 20 evacuation routes with two evacuation points, and five evacuations route in Semangat Dalam Village, which combines five assembly points with one evacuation point.
Keyword: Banjir, Daerah prioritas, Jalur Evakuasi

Judul: Utilization of Geographic Information System for Mapping Flood  Prone Areas in Hulu Sungai Utara Regency, South Kalimantan
Abstrak: Bencana banjir dapat terjadi karena dipengaruhi oleh faktor alam dan faktor nonalam. Kabupaten Hulu Sungai Utara termasuk wilayah dengan potensi banjir yang cukup tinggi karena berada di dataran rendah. Tujuan penelitian ini adalah memetakan daerah rawan banjir dan mengidentifikasi daerah rawan serta risiko banjir di Kabupaten Hulu Sungai Utara. Metode yang digunakan dalam analisis kerawanan banjir adalah metode skoring dan pembobotan dengan bantuan sistem informasi geografis (SIG). Parameter kerawanan banjir yang digunakan yaitu curah hujan, kemiringan lereng, ketinggian lahan, penggunaan lahan, jenis tanah dan buffer sungai. Hasil penelitian menunjukkan wilayah Kabupaten Hulu Sungai Utara didominasi kelas kerawanan banjir kategori rendah seluas 41.310,67 ha (46,28%). Kelas kerawanan kategori tinggi dan sangat tinggi banyak terdapat di Kecamatan Babirik seluas 4.238,00 ha dan Kecamatan Paminggir seluas 651,34 ha. Tingkat risiko banjir di Kabupaten Hulu Sungai Utara sebagian besar masuk kategori sangat rendah seluas 53.363,24 ha (59,78%) yang didominasi Kecamatan Danau Panggang, Kecamatan Amuntai Selatan dan Kecamatan Paminggir., Flood disasters can occur because they are influenced by natural and nonnatural factors. Hulu Sungai Utara Regency is an area with a fairly high potential for flooding because it is located in the lowlands. The purpose of this study were to map flood-prone areas and identify flood-prone areas and risks in Hulu Sungai Utara Regency. The method used in the analysis of flood vulnerability is the method of scoring and weighting with the help of a geographic information system (GIS). The flood susceptibility parameters used are rainfall, slope, land height, land use, soil type and river buffer. The results showed that the area of North Hulu Sungai Regency was dominated by the low category of flood susceptibility class with an area of 41.310,67 ha (46,28%). The high and very high vulnerability classes are mostly found in Babirik District covering an area of 4.238,00 ha and Paminggir District covering an area of 651,34 ha. The flood risk level in Hulu Sungai Utara Regency is mostly in the very low category, covering an area of 53.363,24 ha (59,78%) which is dominated by Danau Panggang District, South Amuntai District and Paminggir District.
Keyword: flood, mapping, prone, risk

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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