A study on the effects of sugi and hinoki leaves on the prevention of soil erosion using an artificial rainfall machine.

DOI Web Site 32 References

Bibliographic Information

Other Title
  • 人工降雨装置を用いたスギ・ヒノキ葉の土壌侵食防止効果に関する研究
  • ジンコウ コウウ ソウチ オ モチイタ スギ ヒノキ ハ ノ ドジョウ シンシ

Search this article

Description

In Japan, it has been reported that soil erosion often occurs in hinoki (Chamaecyparis obtusa) stand. This study clarified the effects of sugi (Cryptomeria japonica) and hinoki leaves on the prevention of surface flow and soil erosion. Some factors which affects eroded soil amount were analyzed by using ANOVA. As a result, the factors and interactions of rainfall intensity, rainfall intensity × land-cover amount and land-cover amount had the higher contributing portions. Land-cover type had a little effect on eroded soil amount and hinoki leaves were found no less effective for soil conservation than sugi leaves. In addition, some factors which would affect surface flow were also analyzed by using ANOVA. As a result, the factors of rainfall intensity and land-cover amount had the higher contributing portions. It was found that land-cover of leaves prevented surface flow which causes soil erosion. In this study, tank models were also employed to explain the mechanism of surface flow. The results showed that splash impacts broke aggregated structure and infiltration rate decreased with less land-cover, and that water storage on surface increased with increased land-cover because of raindrops attached to leaves on the ground. It was also confirmed by using tank models that hinoki leaves were almost as effective as sugi leaves for soil conservation. In conclusion, it is beneficial that leaves taken out of forest lands by logging is returned to the original forest lands in terms of land conservation.

Journal

References(32)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top