2013 Fiscal Year Final Research Report
Estimation of soil water, heat and nitrate dynamics during soil freezing and thawing with meltwater infiltration
| Project/Area Number |
23580328
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Multi-year Fund |
|---|
| Section | 一般 |
|---|
| Research Field |
Irrigation, drainage and rural engineering/Rural planning
|
|---|
| Research Institution | Mie University |
|---|
Principal Investigator |
WATANABE Kunio 三重大学, 生物資源学研究科, 准教授 (10335151)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
MUTO Yoshiko 岩手大学, 農学部, 講師 (30422512)
|
|---|
| Project Period (FY) |
2011 – 2013
|
| Keywords | 凍土 / 浸潤 / 水・熱移動 / 窒素動態 / 不凍水 / 水分特性曲線 / 不飽和透水係数 / 数値解析 |
|---|
| Research Abstract |
We simultaneously measured soil water retention and soil freezing curves and investigated their similarity and hysteresis. We succeeded in direct measurement of soil water potential in frozen soils to confirm the relationship estimated by Clausius-Clapeyron equation, and noted the effect of non-equilibrium growth of ice crystal in soil pores. We also performed directional column freezing experiments and showed the water, heat and nitrate transport during soil freezing/thawing and meltwater infiltration into frozen soils. Furthermore, we microscopically observed profiles of redox potential and dissolved oxygen near soil surface, and showed formation of reduced and reoxidized layers in soil columns under various infiltration rate.
|
-
-
-
-
-
-
-
-
-
-
-
-
-
-
[Book] 新版雪氷辞典2014
Author(s)
渡辺晋生(編集委員・分担執筆)
Total Pages
307 (32, 167, 214)
Publisher
古今書院
