Scenario Analyses of Water Quality Environment in an Agricultural Pond using a Primary Ecosystem Model
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- Yamamoto Tatsuya
- Faculty of Agriculture, Kyushu University
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- Harada Masayoshi
- Faculty of Agriculture, Kyushu University
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- Hiramitsu Kazuaki
- 九州大学大学院農学研究院
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- Mori Makito
- Faculty of Agriculture, Kyushu University
Bibliographic Information
- Other Title
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- 低次生態系モデルを用いた農業用ため池の水質環境のシナリオ分析
- テイジ セイタイケイ モデル オ モチイタ ノウギョウヨウ タメイケ ノ スイシツ カンキョウ ノ シナリオ ブンセキ
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Abstract
To conduct a scenario analyses for the improvement and preservation of water environment in an agricultural pond, a primary ecosystem model was developed for predicting the temporal fluctuation of chlorophyll-a, nitrogen and phosphorus in an eutrophic closed water. The model was characterized by 5 water quality indices of phytoplankton, organic matter, phosphate- phosphorus, dissolved inorganic nitrogen and dissolved oxygen (DO), and was applied to dynamic analysis of an agricultural pond in Fukuoka Prefecture, Japan, where concentrations of total nitrogen and total phosphorous were extraordinarily high. A comparison between calculations and observations showed that the ecosystem model developed could approximately reproduce the actual temporal fluctuation of chlorophyll-a, nitrogen, phosphorus and DO. The scenario analyses indicated that the 90% reduction of the current nutrient inflow load resulted in the remarkable decrease of total nitrogen and total phosphorous concentrations, fulfilling the water quality standard of paddy irrigation water in Japan.
Journal
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- 九州大学大学院農学研究院学芸雑誌
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九州大学大学院農学研究院学芸雑誌 62 (2), 31-42, 2007-10-29
Faculty of Agriculture, Kyushu University
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Keywords
Details 詳細情報について
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- CRID
- 1390290699739107456
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- NII Article ID
- 110006407123
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- NII Book ID
- AA11577672
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- DOI
- 10.15017/8891
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- HANDLE
- 2324/8891
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- NDL BIB ID
- 9262356
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- ISSN
- 13470159
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- Text Lang
- ja
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- Data Source
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- JaLC
- IRDB
- NDL
- CiNii Articles
- KAKEN