2009 Fiscal Year Final Research Report
Study on quantitative evaluation and modeling of water quality conservation function of irrigation pond
| Project/Area Number |
19780181
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Irrigation, drainage and rural engineering/Rural planning
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
NAKAGIRI Takao Osaka Prefecture University, 生命環境科学研究科, 准教授 (80301430)
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| Project Period (FY) |
2007 – 2009
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| Keywords | ため池 / 栄養塩類 / 窒素 / リン / 流出削減 / 多面的機能 / 植物プランクトン / クロロフィルa |
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| Research Abstract |
The purpose of this study is to propose for enhancement of water quality conservation function of irrigation pond. This study was conducted in Hojiike, which is an irrigation pond, and its catchment area located in Konoyama, Kishiwada, Osaka, Japan. The results of this study can be summarized as follows :
1) Hojiike could contribute to reduction of nutrient load flowing down along the river which is its water resource.
2) The existing water quality estimation model regarding aquatic ecosystems in exclusive water area could to some extent estimate and also predict nitrogen and phosphorus in the pond by applying parameters related with phytoplankton behavior determined using the pond water.
3) Stakeholders of the pond were very anxious for degradation of water quality of the pond. So conservation of water quality of the pond should be also considered when the enhancement of water quality conservation function of the pond is promoted.
4) It seems possible to promote more positive strategy for water quality conservation such as some concrete activity for reduction of pollutant load put into the catchment by the stakeholders and introduction of an economical water purification system.
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