ESTIMASI LAJU EROSI/DEPOSIT PADA LAHAN OLAHAN KECIL DI PUNCAK-BOGOR DENGAN ISOTOP ALAM 137Cs

Nita Suhartini

Jurnal Purifikasi
Vol 8 No 1 (2007): Jurnal Purifikasi

Investigation of the erosion rate estimation had been done using environmental isotope 137Cs. Radiogenic 137Cs contents of the soil can be used to estimate the amount of erosion/deposition in an area that has been occurring since the late 1950’s, with respect to the stable reference site. The investigation aimed to estimate erosion/deposit rate in small cultivated site that using ridge and furrow system located in Puncak - Bogor. Sampling of soil was done by using scraper (20 x 50) cm for reference site, and coring (Φi = 7 cm) for investigation points. Two small cultivated sites were chosen namely TS3 (50 x 60) m, and TS5 (50 x 60) m. The result showed that net erosion for TS3 and TS5 were -5 ton/ha.year and -39 ton/ha.year, respectively.