琵琶湖東岸地域における水環境と物質循環に関する研究
スポンサーリンク
概要
- 論文の詳細を見る
[Synopsis] With the inflow of pollutants or murky water, water environment and bio-environment of the lake Biwa have been deteriorating. Conservation measures including the construction of sewerage system, local initiative of reducing waste water or using of non-phosphate detergent are being adopted, but farming practices and reduction of agricultural chemicals have not been very effective due to the fact that wide area is covered, large volume of water is used, and the application of chemicals coincide with the particular period of the year. To establish effective measures for improving the water and bioenvironments, the origin and the circulation mechanism of pollutants need to be identified. In this study, the circulation of nitrogen in the paddy field or upland field was analyzed using DNDC (de-nitrification and decomposition model) and the potential of reducing the nitrogen leaching by changing farming practices was calculated. In addition, the movement of nitrogen or phosphate among different land uses and human/commercial activities was simulated by applying biomass circulation model. Major sources of pollutant, particularly nitrogen and phosphate are from livestock waste, fertilizer, and human waste. Purification capacity of paddy fields or water body can be estimated and measures to strengthening the capacity can be identified by improving the accuracy of these models, which will lead to the establishment of effective conservation measures.
論文 | ランダム
- 動力性能など車両性能予測システムの現状と展望 (自動車技術の現状と将来)
- 有限要素法による内燃機関用ピストンの構造解析
- 有限要素法による車体外板の張り剛性解析
- グーテンベルクの活字を巡って--デジタル技術とHUMIプロジェクトについて (文字のちから--写本・デザイン・かな・漢字・修復) -- (文字と写本を味わうための手引き)
- ヘルマン・ウンガーと現代文学の問題 -『切断された者たち』の解釈を中心に