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[en] The aim of the research is to determine the rate of redistribution of erosion/deposition in cultivated area. The application of 137Cs technique was carried out at cultivated area in Bojong - Ciawi, with slope less than 10o and slope length of about 2 km. A reference site was selected at the top of the slope, and this site is flat, open and covered with grass. Two sites in the cultivated area were selected as study site namely LU-I ( 15 x 25 ) m with the distance of 1000 m from the top, and LU-II (17.5 x 20) m with the distance of 1300 m from the top. Sampling of soil at reference site was done by using scraper (20 x 50) cm, while sampling at study site by using core sampling (di = 7 cm). Soil samples were brought to the laboratorium for preparation and analysis of 137Cs content. Preparation are including of drying, weighing the total dry, sieving and crushing. Analysis of 137Cs content was done using multi channel analyzer (MCA) that connected to high purity germanium (HPGe), at 661 keV, and the minimum counting time of 16 hours. To estimate the erosion/deposit rate, two mathematical model were used, namely Proportional Model (PM) and Mass Balance Model 1 (MBM1). The result for application of 137Cs technique showed that MBM1 gives somewhat higher value for deposit rate and somewhat lower value for erosion than PM. Land use - I (LU-I) of Bojong - Ciawi was suffering from erosion with the erosion rate from 1 t/(ha.y) to 13 t/(ha.y), and LU-II has deposit rate from 1 t/(ha.y) to 50 t/(ha.y). (author)
Source
Singgih Sutrisno; Sofyan Yatim; Pattiradjawane, EIsje L.; Ismachin, Moch; Mugiono; Marga Utama (National Nuclear Energy Agency, Jakarta (Indonesia)) (eds.); Nelly Dhevita Leswara; Umar Mansur (University of Indonesia, Jakarta (Indonesia)) (eds.); Syamsul Arifin Achmad (Bandung Institute of Technology, Bandung (Indonesia)); Komaruddin Idris (Bogor Agricultural University, Bogor (Indonesia)) (and others); Centre for Research and Development of Isotopes and Radiation Technology, National Nuclear Energy Agency (Indonesia); 323 p; ISBN 979-3558-03-2; 
; Feb 2004; p. 299-308; The Scientific Meeting on Research and Development of Isotopes Application and Radiation; Seminar Ilmiah Penelitian dan Pengembangan Aplikasi Isotop dan Radiasi; Jakarta (Indonesia); 17-18 Feb 2004; Also available from Center for Development of Nuclear Informatics, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560923, PO BOX 4274, Jakarta (ID); 11 refs.; 4 tabs.; 6 figs.
; Feb 2004; p. 299-308; The Scientific Meeting on Research and Development of Isotopes Application and Radiation; Seminar Ilmiah Penelitian dan Pengembangan Aplikasi Isotop dan Radiasi; Jakarta (Indonesia); 17-18 Feb 2004; Also available from Center for Development of Nuclear Informatics, National Nuclear Energy Agency, Puspiptek Area, Fax. 62-21-7560923, PO BOX 4274, Jakarta (ID); 11 refs.; 4 tabs.; 6 figs.