Saturated hydraulic conductivity of peat in Changbai Mountain area

doi:10.14088/j.cnki.issn0439-8114.2019.10.010

Abstract

Abstract: The research aimed to take peat land of Changbai Mountain area as research object. The basic characteristics, influencing factors and spatial heterogeneity of saturated hydraulic conductivity（K_sat） of the peat were discussed, and the differences of saturated hydraulic conductivity of the peat between drainage area and natural area were compared. The results indicated that the mean value of the saturated hydraulic conductivity in the vertical direction was about 41.00 m/d, which was at moderate and above level compared with other research areas. The saturated hydraulic conductivity（K_sat） of peat was negatively correlated with unit volume, positively correlated with porosity, and significantly positively correlated with least water-holding capacity, saturation moisture content and organic matter content. At 0~50 cm of surface layer, K_sat in the drainage area was smaller than that in the natural area. The peat land in the natural state increased with the depth. K_sat decreased with the decrease of water conductivity. There were various anisotropy in K_sat. K_satH was larger than K_satV in 63% of samples, but the difference was little. K_satH was about 1.07 times of K_satV, and the correlation between them was extremely high.

Key words: peat, saturated hydraulic conductivity, drainage, various anisotropy

CLC Number:

Q951

LIN Bing-zi, WANG Yi-nuo. Saturated hydraulic conductivity of peat in Changbai Mountain area[J]. HUBEI AGRICULTURAL SCIENCES, 2019, 58(10): 40-44.

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