Judul: Analisis dan Arahan Pengembangan Lahan Pertanian Pangan di Kabupaten Muaro Jambi Provinsi Jambi
Abstrak: Muaro Jambi merupakan kabupaten baru di Provinsi Jambi hasil pemekaran dari Kabupaten Batanghari pada tahun 1999. Letak geografisnya yang strategis, sebagai hinterland, membentuk hubungan ketergantungan dan keterkaitan yang erat dengan ibukota provinsi yaitu Kota Jambi. Kabupaten Muaro Jambi berperan sebagai wilayah produsen pangan, sedangkan Kota Jambi sebagai wilayah inti dan pasar. Untuk mengantisipasi kebutuhan pangan yang akan meningkat seiring dengan perkembangan Kota Jambi maupun Kabupaten Muaro Jambi diperlukan perencanaan pengembangan pertanian pangan yang komprehensif. Dalam perspektif ini, lahan pertanian pangan eksisting di Kabupaten Muaro Jambi perlu dipertahankan dan bahkan diperluas. Upaya peningkatan produksi pangan melalui perluasan areal memerlukan sumberdaya lahan dengan kondisi biofisik yang spesifik. Oleh karena itu, upaya tersebut perlu didukung hasil analisis kesesuaian dan arahan alokasi sumberdaya lahan agar sinkron dengan kebutuhan lahan untuk sektor-sektor pembangunan lainnya. Tujuan penelitian ini adalah: (1) menganalisis penggunaan dan ketersediaan lahan untuk pengembangan tanaman pangan di Kabupaten Muaro Jambi, (2) menganalisis kesesuaian lahan tersedia untuk pengembangan tanaman pangan di Kabupaten Muaro Jambi, (3) mengetahui komoditas pangan unggulan tiap kecamatan di Kabupaten Muaro Jambi, (4) menganalisis kebutuhan pangan dan lahan sampai tahun 2031 di Kabupaten Muaro Jambi dan (5) mengetahui konsistensi penggunaan lahan pangan eksisting terhadap rencana pola ruang lahan pangan dan menyusun arahan pengembangan lahan pangan di Kabupaten Muaro Jambi. Penelitian ini terdiri atas tujuh tahapan analisis data. Penggunaan lahan eksisting diinterpretasi dari Citra Landsat 7 ETM. Lahan tersedia untuk perluasan pertanian pangan dianalisis dengan tidak memasukkan kawasan moratorium hutan dan lahan gambut, tambang, hutan, perairan, Hak Guna Usaha (HGU), perkebunan dan permukiman eksisting. Analisis kesesuaian lahan dilakukan terhadap delapan komoditas pangan, yaitu padi sawah, padi ladang, jagung, kedelai, kacang tanah, kacang hijau, ubi kayu dan ubi jalar. Analisis komoditas unggulan tiap kecamatan dilakukan dengan metode Locational Quotient (LQ) dan komponen Differential Shift (DS) dalam Shift Share Analysis (SSA). Analisis kebutuhan lahan dilakukan sampai tahun 2031 berdasarkan jumlah penduduk, tingkat konsumsi pangan dan produktivitas lahan. Analisis konsistensi penggunaan lahan dilakukan dengan overlay peta penggunaan lahan pangan eksisting dan peta rencana pola ruang lahan pangan dalam RTRW. Hasil dari enam tahapan analisis tersebut selanjutnya disintesis untuk penyusunan arahan pengembangan lahan pertanian pangan secara deskriptif. Total luas lahan di Kabupaten Muaro Jambi adalah 532.165 ha. Penggunaan lahan eksisting terluas adalah perkebunan (310.280 ha; 58,31%). Lahan seluas 481.204 ha (90,42%) teridentifikasi sebagai kawasan moratorium hutan dan lahan gambut, tambang, hutan, perairan, HGU, perkebunan dan permukiman eksisting. Sebagian dari sawah dan pertanian lahan kering eksisting termasuk dalam kawasan ini. Lahan tersedia untuk pengembangan pertanian pangan termasuk sawah eksisting teridentifikasi seluas 50.961 ha atau 9,58% dari luas total lahan di Kabupaten Muaro Jambi. Hasil analisis kesesuaian lahan terhadap lahan tersedia tersebut menunjukkan areal seluas 36.202 ha dengan kelas S2 (cukup sesuai) untuk padi ladang dan S3 (sesuai marginal) untuk padi sawah serta 14.759 ha dengan kelas S3 untuk jagung, kedelai, kacang tanah, kacang hijau, ubi kayu dan ubi jalar. Prioritas pengembangan pertanian pangan diarahkan pada padi sawah dan padi ladang karena merupakan makanan pokok. Kecamatan yang paling banyak memiliki komoditas unggulan tanaman pangan lahan kering adalah Kumpeh Ulu dengan komoditas jagung, kacang tanah, ubi kayu dan ubi jalar. Kecamatan
Keyword: arahan pengembangan lahan, kesesuaian lahan, ketersediaan lahan, komoditas unggulan, rencana pola ruang

Judul: Analysis and Development Direction of Food Agriculture Land in Muaro Jambi Regency
Abstrak: Muaro Jambi is new regency in Jambi Province as resulted from regional development of Batanghari Regency in 1999. Its strategic geographical location, as the hinterland, established a closely dependency relationship to the province capital, i.e. Jambi City. Muaro Jambi Regency played a role as a food producer region, while Jambi City was as a core and market region. In order to anticipate the increasing food demand in line with the development of Jambi City as well as Muaro Jambi Regency, a comprehensive food agriculture development plan should be prepared. In this perspective, the existing food agriculture land in Muaro Jambi Regency must be maintained and even extensified. Efforts to increase food production through land extensification require land resources with specific biophysical conditions. Therefore, these efforts need to be supported by land suitability analysis and land resources allocation direction in order to synchronize with the land requirement for any other development sectors. This research aimed at to: (1) analyze landuse and land availability for food crop development in Muaro Jambi Regency, (2) analyze suitability of available land for food crop development in Muaro Jambi Regency, (3) determine leading food commodities in each subregency in Muaro Jambi Regency, (4) analyze food and land requirement until year 2031 in Muaro Jambi Regency, and (5) determine consistency of existing food crop landuses with spatial pattern plan for food crop land and arrange development direction of food agriculture land in Muaro Jambi Regency. This research was divided into seven stages of data analysis. Existing landuse was interpreted from Landsat 7 ETM imageries. Available land for food agriculture development was analyzed by not including existing peatland and peat forest moratorium, mining, forest, waters, Hak Guna Usaha (HGU), plantation and settlement areas. Land suitability analyses were conducted for eight food commodities, i.e. wetland rice, upland rice, corn, soybeans, peanuts, green beans, cassava and sweet potato. Leading commodity in subregency level was analyzed by using Location Quotient (LQ) and Differential Shift (DS) component in Shift Share Analysis (SSA) methods. Analysis of food and land requirement was done up to 2031 based on population, food consumption level and land productivity. Analysis of landuse consistency was conducted by overlaying map of existing landuse for food crop and map of spatial pattern plan for food crop in RTRW. Results of the preceding analyses were then synthesized to arrange direction for food agriculture land development by description method. The total land resource area in Muaro Jambi Regency was amounted to 532,165 ha. The dominant existing landuse was for plantations (310,280 ha; 58.31%). Lands amounted to 481,204 ha (90.42%) were identified as the existing areas of peatland and peat forest moratorium, forest, waters, mining, HGU, settlement and plantation. Parts of the existing wetland ricefields and upland agriculture were included in these areas. The available land for food agriculture development including the existing wetland ricefield, was identified to be 50,961 ha or 9.58% of the total land resource in Muaro Jambi Regency. The results of land suitability analysis of this available land showed areas amounted to 36,202 ha with S2 class (moderately suitable) for upland rice
Keyword: development direction, land availability, land suitability, leading commodity, spatial pattern plan

Judul: Hamiltonian formulation for linear waves motion in two layers fluid
Abstrak: The surface wave could be considered as a wave that separates two fluids, namely water and air. Based on this assumption, it is introduced the interfacial wave, a wave between two layers of fluid with different density. The formulation of interfacial waves motion begins with deriving the base equation of irrotational ideal fluid. Furthermore, according to irrotational fluid assumption, the base equation can be stated in velocity potential. In this derivation, the fluids domain is assumed to be restricted by rigid lid boundary conditions, both at the upper and lower limit. Therefore, the interfacial waves motion can be explained in a hamiltonian formulation. In the hamiltonian formulation, total energy is defined as the sum of kinetic and potential energy. The hamiltonian system is obtained from reduction of kinetic energy by using the Dirichlet Neumann Operator. The resulted kinetic energy equation is nonlinear. Therefore, this form is linearized by first part of the Taylor expansion. This linearization gives a dispersion relation of linear wave. Based on this dispersion relation, the phase speed of the linear wave depends on the density ratio of the two layers fluid.
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