Preliminary study on spatial distribution of soil erosion in a small watershed in purple hilly area using <sup>137</sup>Cs tracer

Hou Jiancai; Li Zhanbin; Li Mian

Volume 23 Issue 3

Mar. 2007

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Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE) > 2007 > 23(3): 46-50.

Hou Jiancai, Li Zhanbin, Li Mian. Preliminary study on spatial distribution of soil erosion in a small watershed in purple hilly area using ¹³⁷Cs tracer[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2007, 23(3): 46-50.

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Preliminary study on spatial distribution of soil erosion in a small watershed in purple hilly area using ¹³⁷Cs tracer

1.
Institute of Water Resources Research, Xi'an University of Technology, Xi'an 710048, China
2.
State Key Laboratory of Soil Erosion and Dry Farming on Loess Plateau, Yangling 712100, China
3.
Yellow River Institute of Hydraulic Research, Yellow River Conservancy Commission, Zhengzhou 450003, China

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Received Date: April 12, 2006
Revised Date: November 14, 2006
Published Date: March 30, 2007

Graphical Abstract

Abstract

Abstract

The ¹³⁷Cs contents in soil profiles were analyzed under different land use types, gradients, slope lengths, and landform positions in Xiangshuitan watershed in purple hilly area. Spatial distribution of soil erosion in Xiangshuitan small watershed was estimated. Results show that the reference ¹³⁷Cs content is 1870 Bq/m². Average erosion intensity is 4468 t/(km²·a) in cultivated land and 1759 t/(km²·a) in forest land. Erosion amount is exponentially related with slope length and gradient. Average annual soil erosion intensity in hilltop, hillside and neck are 2125, 4676, 1759 t/(km²·a), respectively. Soil erosion is significantly influenced by the land use types, slope lengths, gradients and landform positions. The cultivated land is the chief source of sediment in Xiangshuitan watershed in the purple hilly area.
- ¹³⁷Cs,
- soil erosion,
- spatial distribution,
- purple hilly area

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