Water quality conservation in an agricultural pond using an ecosystem model and scenario analysis

Hour Ix, Kazuaki Hiramatsu, Harada Masayoshi, Makito Mori

研究成果: ジャーナルへの寄稿記事

抄録

To explicate the dynamics of nitrogen and phosphorus in an agricultural pond, numerical simulations were conducted for their temporal fluctuation in pond water by using an ecosystem model, and the developed model was applied to a scenario analysis for the improvement and preservation of water environment by the reduction of nitrogen and phosphorus. In this study, the model was composed of 5 water quality indices-nitrogen oxides, ammonia-nitrogen, organic nitrogen, phosphate-phosphorus and organic phosphorus-and was adapted to the Toishigawara agricultural pond in Fukuoka Prefecture, Japan, where concentrations of total nitrogen and total phosphorous were extraordinarily high. A comparison between the calculated results and the observed data showed that the ecosystem model used in this study could reproduce the dynamics of nitrogen and phosphorus in Toishigawara pond. According to the scenario analysis, 80% reduction of current nutrient inflow load resulted in the remarkable decrease of total nitrogen and total phosphorous concentrations. As a result, total nitrogen fulfilled the water quality standard of irrigation water in Japan.

元の言語英語
ページ(範囲)423-429
ページ数7
ジャーナルJournal of the Faculty of Agriculture, Kyushu University
52
発行部数2
出版物ステータス出版済み - 10 2007

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Water Quality
Ecosystem
Nitrogen
water quality
Phosphorus
ecosystems
nitrogen
phosphorus
Water
Japan
Nitrogen Oxides
water quality standards
nitrogen oxides
Organophosphates
pollution load
Ammonia
irrigation water
ammonia
water
phosphates

All Science Journal Classification (ASJC) codes

  • Agricultural and Biological Sciences (miscellaneous)

これを引用

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abstract = "To explicate the dynamics of nitrogen and phosphorus in an agricultural pond, numerical simulations were conducted for their temporal fluctuation in pond water by using an ecosystem model, and the developed model was applied to a scenario analysis for the improvement and preservation of water environment by the reduction of nitrogen and phosphorus. In this study, the model was composed of 5 water quality indices-nitrogen oxides, ammonia-nitrogen, organic nitrogen, phosphate-phosphorus and organic phosphorus-and was adapted to the Toishigawara agricultural pond in Fukuoka Prefecture, Japan, where concentrations of total nitrogen and total phosphorous were extraordinarily high. A comparison between the calculated results and the observed data showed that the ecosystem model used in this study could reproduce the dynamics of nitrogen and phosphorus in Toishigawara pond. According to the scenario analysis, 80{\%} reduction of current nutrient inflow load resulted in the remarkable decrease of total nitrogen and total phosphorous concentrations. As a result, total nitrogen fulfilled the water quality standard of irrigation water in Japan.",
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AU - Hiramatsu, Kazuaki

AU - Masayoshi, Harada

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