Evaluating Influence of Different Cover Materials on Runoff and Sediment Loss from Bare Upland Soil Using Laboratory Rainfall Simulator

DOI
  • Onishi Taisuke
    United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology
  • Kato Makoto
    United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology
  • Nishimura Taku
    Graduate School of Agricultural and Life Science, University of Tokyo

Bibliographic Information

Other Title
  • 異なる地表面被覆が室内人工降雨試験下における傾斜裸地からの侵食に及ぼす影響

Abstract

The use of composted organic matter as soil surface cover is recently viewed as a potential application for erosion control similarly to straw cover. However, limited information on the effect of these cover materials on erosion from bare soil is available. This study evaluates two cover materials, rice straw and cattle manure compost, with a focus on the relationship between soil surface coverage (expressed in areal%) and soil loss from bare upland field. A clay loam Andisol was packed into a 1.2 m X 0.35 m X 0.12 m soil box with a slope of 14% and subjected to simulated rainfall of 45.1 mm hr-1 for 100 minutes. The soil surface was either left bare or was covered with rice straw (Oryza Sativa L.) or cattle manure compost at a surface coverage of 30 areal % for straw, 35 areal% for compost, and 60 areal% for both materials. During the simulated rainfall, surface runoff was periodically collected to determine sediment concentration and infiltration rate. As the coverage rate increased from 30 or 35 to 60 areal%, the straw and compost covers acted to significantly reduce the sediment concentration. The observed reduction in sediment loss from the covered soils resulted from the direct interception of raindrops and trapping of sediment by the cover ; however, neither cover material was able to reduce the runoff rate. The total runoff volume was higher for compost-covered soils than for bare or straw-covered soils. This result may reflect the development of a depositional crust over the soil surface. Such crusts formed in sediment-trap areas close to pieces of the covering material.

Journal

Keywords

Details 詳細情報について

  • CRID
    1390007902980155008
  • NII Article ID
    130008087818
  • DOI
    10.34467/jssoilphysics.108.0_53
  • ISSN
    24352497
    03876012
  • Text Lang
    en
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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