Analysis of vertical variation characteristic of soil moisture in yellow soil sloping field

Jiang Taiming; Liu Hailong; Liu Hongbin; Xiao Houjun; Xia Jinhui

Volume 21 Issue 3

Mar. 2005

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Abstract

Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE) > 2005 > 21(3): 6-11.

Jiang Taiming, Liu Hailong, Liu Hongbin, Xiao Houjun, Xia Jinhui. Analysis of vertical variation characteristic of soil moisture in yellow soil sloping field[J]. Transactions of the Chinese Society of Agricultural Engineering (Transactions of the CSAE), 2005, 21(3): 6-11.

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Analysis of vertical variation characteristic of soil moisture in yellow soil sloping field

Funds: National Natural Science Foundation of China (10361007) and Natural Science Foundation of Yunnan Province (2004A0001M).

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Received Date: February 16, 2004
Revised Date: October 07, 2004
Published Date: March 30, 2005

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Abstract

Abstract

In this paper, soil moisture vertical variance was used to analyze the moisture characteristic of soil in yellow soil sloping field of Guizhou Province. First, wavelet transform method was used to check saltation points. Second, the response of the variance of soil moisture of each layer was explored through the analysis of mutual spectrum. Last, time lag was studied by phase frequency characteristic. The results indicated that the change of soil moisture in vertical direction was an approximate random stable signal process, and the breaking phenomenon of surface layers(0～20 cm) was more than underlayers(20～100 cm), time lag was demonstrated in the changes of soil moisture in most soil layers.
- soil moisture,
- wavelet transform,
- mutual spectrum

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