Effects of Understory Vegetation on Infiltration Capacity in Japanese Cypress Plantation.

• Hiraoka Marino

  Graduate School of Life and Environmental Sciences, University of Tsukuba

• Onda Yuichi

  Graduate School of Life and Environmental Sciences, University of Tsukuba

• Kato Hiroaki

  Graduate School of Life and Environmental Sciences, University of Tsukuba

• Mizugaki Shigeru

  Civil Engineering Research Institute for Cold Region, Public Works Research Institute

• Gomi Takashi

  Department of International Environment and Agriculture Science, Tokyo University of Agriculture and Technology

• Nanko Kazuki

  Graduate School of Life and Environmental Sciences, University of Tsukuba

Bibliographic Information

Other Title

• ヒノキ人工林における浸透能に対する下層植生の影響
• ヒノキ ジンコウリン ニ オケル シントウノウ ニ タイスル カソウショクセイ ノ エイキョウ

Abstract

To examine the effects of understory vegetation on infiltration capacity, a series of field infiltration test was conducted by using an oscillating nozzle rainfall simulator at 14 sites in steep Japanese cypress plantation. The simple regression analysis among the maximum final infiltration rate (FIR_max), percentage vegetation cover and dry weight of surface cover materials such as understory vegetation were also conducted. The FIR_max for the 14 sites ranged from 5 to 322 mm h⁻¹, and significant correlations were found between the FIR_max and the dry weight, percentage cover of understory vegetation. The lower FIR_max was observed at the site where the percentage vegetation cover was less than 50%, suggesting that Hortonian overland flow may occurs under natural rainfall. This indicated that the cover abundance of 3 or less based on the Braun-Blanquet’s method may result in the significant reduction in infiltration rate. The results indicate that densely vegetated surface can maintain high infiltration capacity on forested steep hillslopes, and cover abundance of the Braun-Blanquet’s method were useful to estimate infiltration capacity in Japanese cypress plantation. This study suggested that the measurement of understory vegetation cover can be used to assess the degradation of unmanaged Japanese cypress plantation, and to establish soil and water conservation practice based on the management of infiltration capacity.

Journal

• Journal of the Japanese Forest Society

  Journal of the Japanese Forest Society 92 (3), 145-150, 2010

  THE JAPANESE FORESTRY SOCIETY

Keywords

• infiltration capacity
• understory vegetation
• Japanese cypress plantation
• an oscillating nozzle rainfall simulator
• the soil and water conservation function of forest

Details

• CRID: 1390001205227605504
• NII Article ID: 130000303111
• NII Book ID: AA12003078
• DOI: 10.4005/jjfs.92.145
• ISSN: 1882398X
• ISSN: 13498509
• NDL BIB ID: 10746390
• Web Site: https://agriknowledge.affrc.go.jp/RN/2010792478
• Web Site: http://id.ndl.go.jp/bib/10746390
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I10746390
• Web Site: http://www.jstage.jst.go.jp/article/jjfs/92/3/92_3_145/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed