Estimating Soil Erosion in Northeast China Using 137Cs and 210Pbex

被引：29
|
作者：
Yang Yu-Hong [1 ,2 ]
Yan Bai-Xing [1 ,2 ]
Zhu Hui [1 ]
机构：
[1] Chinese Acad Sci, NE Inst Geog & Agroecol, Key Lab Wetland Ecol & Environm, Changchun 130012, Peoples R China
[2] N China Univ Water Resources & Elect Power, Coll Water Resources, Zhengzhou 450011, Peoples R China
来源：
PEDOSPHERE | 2011年 / 21卷 / 06期
关键词：
black soil; fallout radionuclide tracer technique; rainfall erosivity; reference inventory; soil loss; BLACK SOIL; DEPOSITION; TRANSPORT; BASIN; RATES; BE-7;
D O I：
10.1016/S1002-0160(11)60173-2
中图分类号：
S15 [土壤学];
学科分类号：
0903 ; 090301 ;
摘要：
Evaluation of soil erosion in agricultural fields is valuable to develop conservation practices for reducing agricultural nonpoint source pollution. Soil erosion rates were quantified using the fallout radionuclide tracer technique in Mojiagou Basin located on the outskirts of Changchun in Northeast China. The calculated soil erosion rates in the study area were, 1.99 and 1.85 mm year(-1) Cs-137 and excess Pb-210 (Pb-210(ex)) measurements, respectively. Both fallout radionuclides showed a similar tendency at downslope sites. All measured sites have experienced net erosion during the past 50 to 100 years. Cs-137 and Pb-210(ex) measurements were useful to quantify soil erosion rates on field and small basin scales. At this rate of erosion, the current fertile topsoil layer would be entirely removed within 70 years.
引用
收藏
页码：706 / 711
页数：6
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