2019 Fiscal Year Final Research Report
Spatial distribution of water balance components of Lake Kasumigaura and its change over 40 years
| Project/Area Number |
15K01159
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Geography
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| Research Institution | University of Tsukuba |
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Principal Investigator |
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| Project Period (FY) |
2015-10-21 – 2020-03-31
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| Keywords | 熱収支 / 水収支 / 霞ヶ浦 / 湖沼 |
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| Outline of Final Research Achievements |
We determined the current water balance of Lake Kasumigaura by combining available data such as river discharge and our own estimates of lake evaporation, agricultural water use, etc. The results were compared with the estimates in the past. It was found that natural hydrologic components such as precipitation, evaporation, and river discharge were not very different while artificial water use such as industrial water or domestic water increased due to change in watershed population and social structure.
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| Free Research Field |
水文学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究の結果，気候変化や土地利用変化の影響が大きくは霞ヶ浦の水収支に影響を与えていないことがわかり，これは水資源量の増減による社会生活への影響を考慮しなくてもさしあたり問題がないことを示している．また，湖の水収支は扱う項目が多岐にわたり，きちんと推定されていない場合がほとんどであるが，本研究はそれを行った点，過去と比較した点に学術的な意義がある．また，個々の項目を推定する上で得られた新しい知見，今後の研究につながる課題を見いだした点も重要である．
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