書誌事項
- タイトル別名
-
- Estimating unsaturated hydraulic conductivity of undisturbed Japanese soils by multi-step outflow experiment
- マルチステップ リュウシュツホウ ニ ヨル フカクラン ドジョウ ノ フホウワ トウスイ ケイスウ ノ スイテイ
この論文をさがす
抄録
Multi-step outflow experiments were performed to investigate unsaturated hydraulic properties of undisturbed Japanese soils under different management; paddy field, upland field, and forest. Cumulative outflow volume and soil water pressure head were measured to estimate the uns aturated hydraulic properties by inverse technique. Mualem-van Genuchten's model was employed to solve the Richard's equation. Relative error objective function showed best results, since care should be paid at high water content because of the deviation from log-normal properties. Repacked soils showed good correlation between direct method and multi-step outflow method. On the other hand for undisturbed soils, effect of macropore caused abrupt changes in hydraulic conductivity near saturation. Because measured Ks showed maropore Ks whereas Ks in the models showed matrix Ks, it is appropriate to apply Ks as variable for undisturbed soils. Multi-step outflow experiment was acceptable as an unsaturated hydraulic conductivity experiment for Japanese soils except near saturation.
収録刊行物
-
- 農業土木学会論文集
-
農業土木学会論文集 2001 (213), 309-316,a2, 2001
社団法人 農業農村工学会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390001204543020672
-
- NII論文ID
- 130004348404
- 10012330185
-
- NII書誌ID
- AN00201203
-
- ISSN
- 18847234
- 03872335
-
- NDL書誌ID
- 5821915
-
- データソース種別
-
- JaLC
- NDL
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可