Judul: Priority of City Forest Locations for Water Conservation in Bogor City
Abstrak: Kota Bogor terus mengalami perkembangan jumlah penduduk yang berimplikasi terhadap pesatnya pembangunan. Hal tersebut menyebabkan tekanan terhadap lingkungan yaitu perubahan tutupan lahan, sehingga kawasan resapan air terus berkurang. Penelitian ini bertujuan menentukan Prioritas lokasi hutan kota untuk konservasi air berdasarkan faktor jasa ekosistem pengaturan air, rencana tata ruang wilayah, tutupan lahan, dan kerapatan vegetasi. Pembobotan faktor dilakukan menggunakan Analytical Hierarchy Process. Prioritas lokasi hutan kota dikategorikan menjadi tiga kelas Prioritas yaitu Prioritas 1 dengan luas 591 ha (5,3%), Prioritas 2 dengan luas total 3.026 ha (27,2%), dan Prioritas 3 dengan luas 7499 ha (67,5%). Prioritas 1 berada pada pola ruang kawasan lindung dengan dominasi berupa kawasan tempat pemakaman umum. Prioritas 2 berada pada pola ruang kawasan budidaya dengan dominasi berupa kawasan perumahan kepadatan sedang., The city of Bogor has experienced continuous population growth, leading to rapid urbanization. This development has exerted immense pressure on the environment, resulting in significant land-use changes and a subsequent decline in water catchment areas. This study aims to prioritize locations for urban forest establishment to enhance water conservation, considering factors such as water regulation ecosystem services, spatial planning, land cover, and vegetation density. The Analytical Hierarchy Process was employed to weight these factors. The prioritized locations for urban forests were categorized into three classes: Priority 1 (591 ha, 5.3%), Priority 2 (3,026 ha, 27.2%), and Priority 3 (7,499 ha, 67.5%). Priority 1 areas predominantly fall within protected zones, often dominated by public cemeteries. Priority 2 areas are primarily located in cultivated zones, with a significant proportion being medium-density residential areas.
Keyword: Hutan Kota, jasa ekosistem, Pengaturan air

Judul: Prioritas Pengembangan Ruang Terbuka Hijau di Kabupaten Bogor.
Abstrak: Kabupaten Bogor dengan aksesbilitas tinggi terhadap pusat kegiatan nasional sehingga cenderung mengalami penurunan kualitas lingkungan. Ruang terbuka hijau diharapkan menjadi salah satu upaya untuk menghindari penurunan kualitas lingkungan. Penelitian ini dilakukan untuk menentukan kawasan prioritas pengembangan ruang terbuka hijau dan menganalisis potensi ruang terbuka hijau di Kabupaten Bogor. Lokasi prioritas ruang terbuka hijau sempadan sungai dan danau berdasarkan Peraturan Pemerintah. Lokasi prioritas ruang terbuka hijau kota berdasarkan nilai konsentrasi polutan udara yang diharapkan untuk mengurangi tingkat polutan udara. Pemilihan kawasan prioritas berdasarkan polutan udara digolongkan ke dalam 3 kelas prioritas. Kelas Prioritas 1 memiliki sebaran seluas 3 716.69 ha (1.24%), kelas Prioritas 2 memiliki luas sebaran 145 588.69 ha (48.73%) dan kelas Prioritas 3 memiliki luas sebaran seluas 149 430.19 ha (50.02%). Tutupan lahan sempadan sungai dan sempadan danau didominansi oleh lahan terbangun dengan luas 2 861 ha atau 31.02% dari luas total sempadan sungai dan 203 ha atau 33.12% dari luas total garis sempadan danau.
Keyword: Bogor, Danau, Polusi Udara, Ruang Terbuka Hijau, Sungai

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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