フルテキストファイル
著者
藤巻 晴行 Arid Land Research Center, Tottori University 研究者総覧 KAKEN
Yanagawa, A. Environmental Systems and Engineering, School of Science and Engineering, MEISEI University
キーワード
water retention
drought
unsaturated hydraulic conductivity
model WASH_1D
抄録
Accurate determination of unsaturated hydraulic conductivity in low pressure head range is critical for predicting evaporation rate under localized irrigation or root water uptake under drought stress conditions. We proposed a relatively low cost and fast laboratory method to simultaneously determine water retention and hydraulic conductivity functions across a wide range of pressure heads. The method is quite similar to conventional evaporation method using two tensiometers. In addition to tensiometer readings, the proposed method uses water content profile at the end and cumulative evaporation. Experimental results for three soils with different textures showed that inversely optimized hydraulic conductivity functions agreed with K-data measured with the steady state evaporation method, indicating the reliability of the proposed method. The hydraulic conductivity functions fitted for K-data obtained by tensiometer readings with Campbell’s K(θ) function also agreed well with the reference K-data for two of the three soils, but largely deviated from those for the third soil. This indicates the importance of actual measurement of K(θ) in low pressure head range.
出版者
Springer Nature
資料タイプ
学術雑誌論文
外部リンク
ISSN
10642293
EISSN
1556195X
掲載誌名
EURASIAN SOIL SCIENCE
52
4
開始ページ
405
終了ページ
413
発行日
2019-04
出版者DOI
著者版フラグ
その他
著作権表記
This version of the article has been accepted for publication, after peer review (when applicable) and is subject to Springer Nature’s AM terms of use, but is not the Version of Record and does not reflect post-acceptance improvements, or any corrections. The Version of Record is available online at: https://doi.org/10.1134/S1064229319040069
掲載情報
Fujimaki H., Yanagawa A.. Application of Evaporation Method Using Two Tensiometers for Determining Unsaturated Hydraulic Conductivity beyond Tensiometric Range. EURASIAN SOIL SCIENCE. 2019. 52(4). 405-413. doi:10.1134/S1064229319040069
部局名
附属教育研究施設
言語
英語
Web of Science Key ut
WOS:000470321100006