Comparative Study on Saturated Hydraulic Conductivity of Limestone and Dolomite Slope

MENG Fande; PENG Tao; WANG Shijie; CAI Xianli; ZHANG Lin

doi:10.13961/j.cnki.stbctb.2015.01.016

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Comparative Study on Saturated Hydraulic Conductivity of Limestone and Dolomite Slope

- Comparative Study on Saturated Hydraulic Conductivity of Limestone and Dolomite Slope
- Bulletin of Soiland Water Conservation Vol. 35, Issue 1, Pages: 85-89(2015)
- 作者机构：
  
  1. 中国科学院地球化学研究所环境地球化学国家重点实验室,贵州,贵阳,550002
  2. 普定喀斯特生态系统观测研究站, 贵州普定,562100
  3. 中国科学院大学,北京,100049
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2015.01.016
  CLC：
- Published：2015
- 稿件说明：
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MENG Fande, PENG Tao, WANG Shijie, et al. Comparative Study on Saturated Hydraulic Conductivity of Limestone and Dolomite Slope[J]. Bulletin of Soiland Water Conservation, 2015, 35(1): 85-89.
DOI：

MENG Fande, PENG Tao, WANG Shijie, et al. Comparative Study on Saturated Hydraulic Conductivity of Limestone and Dolomite Slope[J]. Bulletin of Soiland Water Conservation, 2015, 35(1): 85-89. DOI： 10.13961/j.cnki.stbctb.2015.01.016.

摘要

[目的

]

对比研究不同下垫面特征和土地利用方式对两类坡地表层土壤性质及其土壤饱和导水率(K

)的影响。[方法

]

以喀斯特地区不同岩性下垫面的石灰岩和白云岩两类坡地表层土壤为研究对象

采用Guleph稳定入渗仪和土壤分析的方法。[结果

]

(1)石灰岩和白云岩表层土壤在受到放牧作用影响后

土壤均呈现显著退化趋势

其容重、黏粒含量增大

孔隙度、有机质含量降低。(2)石灰岩和白云岩两类坡地表层土壤在未受到人为干扰的自然植被条件下

由于表层岩溶带的发育

都很高

平均值分别为328.6和257.2 mm/h。其中

石灰岩坡地相比白云岩坡地

具有更高的空间变异性

二者K

变异系数变化范围分别为90.71%~95.62%和59.60%~67.32%。(3)受到放牧作用影响后

石灰岩和白云岩坡地表层土壤K

相比自然植被状态下呈显著降低趋势

分别降低52.2%和86.7%

白云岩坡地K

降低程度大

高于石灰岩坡地。

Abstract

[Objective] To analyze the influence of land use and lithology on soil properties and saturated hydraulic conductivities (Ks).[Methods] The surface soil from limestone and dolomite slopes in karst region was took as the study objective

and Guelph parameter and soil laboratory analysis were used.[Results] (1) Under over grazing condition

soil bulk density and clay content increased and porosity and organic matter content decreased significantly on both of limestone and dolomite slopes. (2) Under undistured land use condition

Ks of limestone and dolomite soil was very high

the average value was 328.6 mm/h and 257.2 mm/h respectively. Compared to dolomite slope

the spatial distribution of Ks on limestone slope was more heterogeneities that coefficients of variations (Cv%)

which changed between 90.71% and 95.62%. (3) Under the influence of over grazing

the Ks of limestone and dolomite soil decreased by 52.2% and 86.7% respectively

significantly lower than average values.

关键词

Keywords

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