| Project/Area Number |
18580143
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
林学・森林工学
|
|---|
| Research Institution | Nagoya University |
|---|
Principal Investigator |
HATTORI Shigeaki Nagoya University, Graduate School of BioagriculturalSaences, Professor (30273212)
|
|---|
| Project Period (FY) |
2006 – 2007
|
| Project Status |
Completed (Fiscal Year 2007)
|
| Budget Amount *help |
¥3,730,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥330,000)
Fiscal Year 2007: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2006: ¥2,300,000 (Direct Cost: ¥2,300,000)
|
|---|
| Keywords | evaporation from forest floor / canopy structure / micrometeorological factor / water balances / heat balance / litter layer / deciduous broad-leaved forest / 自動開閉式チャンバー |
|---|
| Research Abstract |
The evaporation from forest floor has been observed for two years in a deciduous broad-leaved forest in Seto city, taking the thickness, of litter layer into consideration. The characteristics of the daily and seasonal changes of the evaporation from forest floor was analyzed considering the influences of micrometeorological factors, soil moisture of litter layer and canopy structure. As the results, the following findings were obtained.
1.The characteristics of daily and seasonal changes of evaporation from forest floor The daily evaporation was 0.42 mm in foliated season (May-October) and 0.29 mm in defoliated season (November-April) . These data were almost the same range of evaporation reported so far in various forests. The ratio of evaporation from forest floor in forest evapotranspiration from dry canopy was about 14% in foliated season and about 29% in defoliated season.
2.The response of evaporation from forest floor to micrometeorological condition The regression analysis was carried out to make clear the influence of micrometeorological factors on the evaporation from forest floor. We confirmed that the saturation vapor deficit correlated closer with the evaporation from forest floor than the other factors.
3.The influences of the litter layer on the evaporation from forest floor
The evaporation from forest floor with litter layer decreased comparing with the evaporation from bare soil surface ; litter layers with 1.5 cm thickness and 4 cm thickness decreased by about 5 % and by about 19% respectively. The limitation of evaporation from forest floor might be larger according to the thickness of litter layer.
|
