RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2004, Vol. 13 >> Issue (6): 562-567.

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APPLICATION OF 137Cs AS TRACING METHOD TO STUDY SOIL EROSIONON SLOPING LANDS IN THE HILLY RED SOIL AREA——A CASE STUDY IN FENGCHENG CITY,JIANGXI PROVINVE

PU Li-jie1,2,ZHAO Yao-yang1,JIN Ping-hua1,WANG Jin-lei1,HUANG Xian-jin1,2   

  • Received:2004-06-10 Revised:2004-07-08 Online:2004-11-20
  • Contact: PU Li-jie

Abstract: Soil erosion is a severe problem in sloping land of hilly red area. Based on 137Cs tracing technique and by some soil erosion estimating models, the soil erosion rate on the representative sloping lands of Fengcheng City, Jiangxi Province was studied. The results showed that the reference inventory of 137Cs in the study area without soil erosion or man disturbing is 1 992.45±145.63 Bq/m2 . The annual soil erosion occurring on different parts of slope is evidentily different, with its rate increasing in the order form top of slope, middle of slope and to bottom of slope. Under different land use types, the average soil erosion rates are also different, which decreases in the order from, cultivated sloping land, multislope of conversion from farmland for 30 a and 1 a, slope of conversion from farmland for 30 a and barren slope. This result is benefitial for making relative land use, water and soil conservation policy for the ongoing national reducing cultivated land to forestland and grassland project in the study area.

Key words: 137Cs tracing method, soil erosion, sloping land, red soil area, Jiangxi Province

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