Judul: Pemodelan Lahan Basah Potensial berdasarkan Indeks Topografi di Bretagne, Perancis
Abstrak: Lahan basah merupakan sumber daya alam pentingyang mendukung keanekaragaman hayati. Di Perancis dalam menyebutkan lahan basah digunakan istilah lahan basah potensial, yaitu suatu lahan basah yang memiliki potensial dalam penggunaannya. Topografi dan geomorfologi memainkan peran utama untuk pengembangan lahan basah dan merupakan faktor yang menentukan dalam pemodelan lahan basah berkelanjutan. Pentingnya mengidentifikasi lahan basah, dapat digunakan sebagai dasar untuk menentukan prioritas pembangunan yang akan didasarkan pada aspek teknis dan sosial ekonomi. Tujuan dari penelitian ini adalah untuk memprediksi luas spasial lahan basah potensial di Bretagne, Prancis dari indeks topografi dikalibrasi pada satu set 10 peta tanah rinci. Dalam mengidentifikasi lahan basah yang potensial, berdasarkan hidromorfi tanah yang dilakukan dengan metode 4 kriteria.Penelitian ini mengacu kepada Merrot 2006 yaitu dengan metode yang sama berhasil mengidentifikasi lahan basah potensial berdasarkan indeks topografinya. Hal yang membedakan adalah jumlah peta yang digunakan yaitu 1 peta dan 10 peta, sehingga dapat dilihat apakah penelitian terdahulu memiliki nilai yang sama atau berbeda. Berikut ini empat tahap analisis yang masing-masing dikategorikan: (a) identifikasihidromorfi, (b) indeks perhitungan topografi, (c) perhitungan ambang batas, (d) validasi. Sebuah metode ambang batas dilakukan antara peta tanah dan indeks topografi untuk menunjukkan kondisi kesamaan. Penggunaan ambang batas dan validasi merupakan pengembangan cara baru dengan menggunakan 120 kombinasi peta tanah. Hasil indeks topografi adalah 4,7 dan diterapkan untuk semua Bretagne.
Keyword: lahan basah potensial, hidromorfi tanah, ambang batas, index topografi, analisis spasial

Judul: Pemetaan kawasan berpotensi banjir menggunakan sistem informasi georafis
Abstrak: Remote Sensing and Geographic Information System (GIS) can be applied to identify potential flood area. Remote Sensing helps to extract information without direct interaction with the object. On the other hand, GIS can be used to identify flood prone of an area using overlay method toward the parameters that causes flood phenomena. The object of this research was to mapping the vulnerability of flood area in Indramayu Regency using cartography models of biophysics parameters, to study the distribution and characteristic of flood area in Indramayu Regency, and to study the result using different rainfall parameters and weight category for mapping vulnerable flood area in Indramayu Regency. Data processing was done using software such as ArcView 3.3, ERDAS Imagine 9.1, and Frame & Fill (USGS). The used data are rainfall, Landsat Imagery; DEM, SRTM data; soil map, river map, and landform map. The methods consist of imagery analysis, DEM data analysis, rainfall data analysis, attribute data analysis, spatial analysis dan vulnerabilty class analysis. Rainfall parameter divided into two groups, the first group used annual mean rainfall data and the second group used monthly mean rainfall data (threemonth peak of rainy season). Proportion of parameters that called as a weight category in this research divided into two groups, the first group with different weight and the second group with equal weight. The results showed that Indramayu Regency can be concluded as a potential flood area, where the north side of Indramayu Regency is more vulnerable rather than the south side. The land characteristic of the potential flood area are flat area, alluvial plains, bad drainage, and paddy field land cover. The map that using monthly mean rainfall data and different weight is more representative for mapping flood area in Indramayu Regency.
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Judul: Synthesis of Heterogeneous Catalyst from Salicylaldehyde-1,2-cyclohexanediamine Metal Complexes for Oxidation of Secondary Alcohol to Ketone.
Abstrak: Heterogeneous catalysts from salicylaldehyde-1,2-cyclohexanediamine metal complexes anchored on silica have been synthesized. Cobalt and copper was used in this study. Characterization of resulting catalysts have been carried out by Fourier transform infrared spectrophotometer (FTIR) and atomic absorption spectrophotometer analysis. In this research, the performance of both catalysts in oxidation of secondary alcohol have been tested. Oxidation of a secondary alcohol was carried out by addition of catalyst (10 mol%) into secondary alcohol-acetonitrile mixture. The reaction was carried out by passing oxygen gas over the mixture for 4 h at ambient temperature. The secondary alcohol sample used in this oxidation reaction was 2-propanol. FTIR analysis shows that both catalysts were able to oxydize the 2-propanol. The ketone was characterized by the present of C=O stretching vibration. Both catalysts showed quite similar selectivity toward the 2-propanol.
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