2015 Fiscal Year Final Research Report
Study on recovery of water cycle in arid rangeland deteriorated by overgrazing
| Project/Area Number |
25850163
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Rural environmental engineering/Planning
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| Research Institution | The University of Tokyo |
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Principal Investigator |
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 乾燥地草原 / 水収支 / 熱収支 / 蒸発散 / 土壌水分 / 浸透能 / 過放牧 / モンゴル |
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| Outline of Final Research Achievements |
Water and heat balances in Mongolian rangeland and infiltration capacities under the conditions of overgrazing and no grazing were measured to understand water balances in arid grassland under overgrazing and processes of recovery of water balance under the conditions of no grazing. Our results showed that almost all precipitation in the grass land was consumed by evapotranspiration and thus less percolation into deep soil was observed; consequently changes in water content there were mainly observed at shallow depth; prohibiting grazing reduced soil evaporation by plant cover and prevented non-uniform infiltration by increase in infiltration rate, thus increased plant available water in surface soil. In addition we developed a numerical model that represents water balance in arid grass land based on theories of water flows in soil plant and atmosphere continuum.
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| Free Research Field |
農地環境工学
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