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2011 Fiscal Year Final Research Report

Evapotranspiration at a secondary forest and a bare land in Central Amazonia

Research Project

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Project/Area Number 21500999
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Geography
Research InstitutionHiroshima University

Principal Investigator

TSUCHIYA Akio  広島大学, 大学院・総合科学研究科, 助教 (00263632)

Project Period (FY) 2009 – 2011
Keywordsアマゾン / 再生林 / 天然林 / 牧場 / 蒸散 / 蒸発 / 土壌水分 / 水収支
Research Abstract

Micro-meteorological and stem sap flow measurements were repeated five times from 2009 to 2011 at a primary forest, a secondary forest, and a pasture in central Amazonia. The evapotranspiration was estimated to be 8. 1-17. 2 t/ ha/ day for the secondary forest, and that for the primary forest was 10. 9-24. 3 t/ ha/ day, respectively. The daily evaporation at the pasture was calculated to be 8. 2-28. 7 t/ ha, and that of precipitation was 16. 1-112. 7 t/ ha. When the pasture was covered with grass, the evaporation was larger than the evapotranspiration at forests, while when the livestock had eaten the grass, the evaporation fell below the evapotranspiration. In the latter case, temperatures increased near the ground surface and the air-filled porosity expanded with the progress of evaporation. The cancellation of grazing expansion policies and conversion to secondary forests will be important steps to stopping the drying and warming of Amazonia.

  • Research Products

    (2 results)

All 2012 2011

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (1 results)

  • [Journal Article] Changes inn evapotran spiiration and CO_2 flux acccom panying ththe land use change from forests to pastures in central Amazonia2012

    • Author(s)
      Tsuchiya Akioo
    • Journal Title

      Pappemrs of the Applied Geograpphy Conference 35

      Volume: (掲載頁未定)

    • Peer Reviewed
  • [Presentation] Soil CO_2 flux betweeen a pastture and a foreest floor in Noovo Aripuana along the Madeira River, AM.2011

    • Author(s)
      Tsuchiya Akkio
    • Organizer
      Seminarioo de Poss-graduacao em mudancass climaticas diante das alternativass florestais e ambientees de presservacao dos recursos natuurais Universsidade do EEstado do Amazonas,
    • Place of Presentation
      Manaus, Brazil
    • Year and Date
      2011-08-07

URL: 

Published: 2013-07-31  

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