Hasil Pencarian  ::  Simpan CSV :: Kembali

"The objectives of this research are to develop a model of water table fluctuation on tidal lowland area of A/B type. The results of the research are expected to support of the agricultural development on tidal lowland area, especially on water management, because the water management play an important role in the agricultural on tidal lowland area. The water table on tidal lowland area fluctuates according to space and time. The water table controls at a certain depth can support the plant growth and the pyrite oxidation restraint. The model of water table fluctuation which is developed in this research based on the ellipse concept. The research was conducted on the reclamation area of tidal lowland at the fourth tertiary block in P8-12S Delta Telang I, Banyuasin district, South Sumatra province. The simulations of model show good result of estimating the depth of water table on tidal lowland area of A/B type. The Proportion of variation the depth of water table hich can be explained by model that is 89.6% up to 95.5% with standard error of the estimate is 0,021-0,035 meters. The parameter of the water level in the tertiary canals has high sensitivity to the model."

"Lahan rawa pasang surut berperan penting dan strategis dalam peningkatan produksi pangan ke depan, mengingat terbatasnya lahan subur serta tingginya laju pertambahan penduduk, konversi lahan, dan fragmentasi pemilikan lahan usaha tani. Lahan rawa pasang surut luasnya mencapai 23,25 juta ha, 11,11 juta ha di antaranya berpotensi dikembangkan sebagai lahan pertanian produktif, namun baru sekitar 5,27 juta ha yang dibuka dan dimanfaatkan. Pengelolaan air di lahan rawa pasang surut tidak cukup hanya memanfaatkan gerakan pasang, tetapi memerlukan teknologi untuk meningkatkan efisiensi dan efektivitas pelindian dan memperbaiki kualitas tanah sehingga produktivitas lahan menjadi lebih baik. Kearifan lokal petani di lahan rawa dapat dimanfaatkan untuk memperkaya teknologi pengelolaan air sehingga dapat meningkatkan produksi dan pendapatan usaha tani dengan memerhatikan dinamika tanah, biodiversitas, dan kelestarian lingkungan. Strategi pengelolaan air dalam mendukung optimalisasi lahan dan intensifikasi pertanian perlu ditempuh melalui: (1) refocusing daerah sasaran dengan penentuan zonasi pengelolaan air yang didasarkan pada perilaku tata air dan hidrologi setempat; (2) perbaikan dan pembangunan infra-struktur jaringan tata air; (3) pemantauan dan pengembangan perencanaan sepanjang masa pemanfaatan lahan; (4) pening-katan kegiatan diseminasi teknologi pengelolaan air melalui pelatihan dan penyuluhan; dan (5) refocusing penelitian dan pengembangan teknologi pengelolaan air untuk mendukung peningkatan produktivitas dan intensitas tanam."

"The potential land of Indonesia that serves its function as agriculture is about 162.40 million hectares. It consists of 33.4 hectares of swamp area is scatteres in several big island , among them are 9.37 million hectares of swamp area...."

"ABSTRAKPembukaan lahan gambut yang didahului dengan pembuatan saluran‐saluran (drainase) akan menyebabkan turunnya muka air tanah, hal ini akan memacu laju dekomposisi bahan organik dan pada akhirnya gambut menjadi rentan terbakar dan teremisi. Oleh karena itu pengetahuan laju emisi carbon sangat penting untuk perencanaan sistem drainase, dalam rangka memelihara kelestarian gambut. Metode ilmiah yang digunakan meliputi: perhitungan sebaran ketebalan/kedalaman gambut, volume gambut kering, volume gambut teroksidasi, berat C gambut kering dan CO2 equivalent. Laju emisi karbon (C) dihitung berdasarkan emisi karbon (C) dan waktu subsiden. Selanjutnya laju emisi C (Mton CO2/tahun) dihitung berdasarkan 4 (empat) buah konsep pemodelan/skenario, yaitu: kondisi aktual/eksisting, perkebunan, bendung (canal blocking), bendung (canal blocking) dan dengan penghutanan kembali. Kegiatan ini dilakukan di Sei Ahas, Kapuas, Kalimantan Tengah dan Sungai Buluh, Tanjung Jabung Timur, Jambi. Berdasarkan hasil penelitian didapatkan bahwa perubahan tata guna lahan akan sangat berpengaruh terhadap perubahan elevasi muka air tanah gambut yang turut serta memacu peningkatan emisi C ke atmosfer."

"ABSTRAKDrainage construction for plantations development on peatlands often caused controversy. Drainage construction will be followed by subsidence of peatland . To be able to extend the chance to get profit in the plantation business subsidence prevention efforts are needed. Setting water level and the prevention of excessive drainage is one of the efforts to reduce the rate of subsidence of the peat.This study is based on literature review by collecting information from various sources and then comparing and analyzing it so that information is obtained on a comprehensive subject matter. Literature review include: monitoring parameters, types of equipment for monitoring, pattern placement monitoring equipment, the range and the frequency of monitoring. From the study concluded that the water level necessary to measure on land and channels using dipwell and staff gauges. Observations were made with a combination of automated recording device and manual recording. Both are quite accurate, but the use of automatic registers in remote locations saves time, and if an automatic device is installed in an area that has the potential to have large water level fluctuations and runs quickly, it will provide more accurate data. Observations on dams for water level control are installed at every 20 cm drop in hidraulic head."

"This research was conducted by computer simulation to study the implementation of automatic control the depth of water table in the paddy field which applied system of intensification (SRI)...."