2014 Fiscal Year Annual Research Report
同位体トレーサーと数値モデルを併用した流域滞留時間推定手法の開発とその検証
| Project/Area Number |
13J03813
|
|---|
| Research Institution | University of Tsukuba |
|---|
Principal Investigator |
馬 文超 筑波大学, 生命環境系, 特別研究員(PD)
|
|---|
| Project Period (FY) |
2013-04-01 – 2015-03-31
|
| Keywords | transit time / isotope tracer / tank model / catchment hydrology / Fuji basin |
|---|
| Outline of Annual Research Achievements |
An approach to estimate the time-variant MTT and TTD using a five-layer tank model with isotopic tracers was proposed and tested within Fuji River catchment, central Japan. The tank model used for the transit time estimation was calibrated and then validated by comparing observed and simulated results of not only water balance but also isotope balance. Predominant factor controlling temporal variability of MTT is precipitation amount. Occurrence of precipitation alters TTD, with increases in younger components, and shortens the MTT. Long-term MTT values correlated with mean slope, coverage of Mesozoic sand stone/shale, coverage of forest, evaporation, interception and storage for each catchment. All of these are related to the amount of groundwater storage, which is smaller in mountainous areas and greater in plain areas.
|
| Research Progress Status |
26年度が最終年度であるため、記入しない。
|
| Strategy for Future Research Activity |
26年度が最終年度であるため、記入しない。
|
Research Products
(2 results)
