砾石对丘陵紫色砾质土持水性的影响
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国家水体污染控制与治理科技重大专项资助(2008ZX07425-003)


Effects of Gravel on Water Retention Capabi lity of Purple Gravelly Soils in a Hilly Area
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    摘要:

    通过红棕紫泥、灰棕紫泥、棕紫泥原状土和扰动土的持水性实验, 研究了砾石对丘陵紫色砾质土持水性的影响。结果表明, 在考虑砾石的情况下, 原状土饱和含水量减少0.70%~10.70%, 田间持水量减少2.07%~4.33%; 砾石含量<10%, 饱和含水量和田间持水量与砾石含量关系不明显; 砾石含量>10%, 饱和含水量和田间持水量随砾石含量减少而增加; 在0~30kPa吸力段, 原状土和扰动土的持水能力、幂函数拟合式的a值、原状土物理性黏粒含量、扰动土比水容量都随砾石含量减少而增大; 原状土的比水容量随砾石含量减少而减小。

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    By the experiments of water retention capability for the red-brown purple soils, grey-brown purple soils, and brown purple soils that were disturbed or undisturbed, the effects of gravel on water retent ion capabilities of purple gravelly soils in a hilly area were studied. Results showed that by considering gravel of undisturbed soils, the saturated water contents were reduced by 0.70%~ 10.70% and the field capacities, by 2.07%~ 4.33%. When the gravel content was less than 10%, it did not have an obvious relationship with the saturated water content sand field capacities of undisturbed soils. When the gravel content was more than 10%, the saturated water content sand field capacities increased with the decreased gravel content. At 0~ 30kPa, the water-holding capacities and the avalues of power functions for undisturbed and disturbed soils, the clay contents of undisturbed soils, and the specific water capacities of disturbed soils were all increased with the decreased gravel content. The specific water capacities of undistur bed soils decreased with the decreased gravel content.

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李燕,刘吉振,魏朝富,易志坚,洪云菊,柴勇.砾石对丘陵紫色砾质土持水性的影响[J].水土保持通报,2009,(5):35-39

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  • 收稿日期:2009-02-08
  • 最后修改日期:2009-03-26
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  • 在线发布日期: 2014-11-26
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