九州大学大学院農学研究院生産環境科学部門生産環境情報講座生産環境情報学研究室
Laboratory of Bioproduction and Environment lnformation Sciences, Division of Bioproduction and Environment lnformation Sciences, Department of Bioproduction Environmental Science, Faeulty of Agriculture, Kyushu Univeresity
九州大学大学院農学研究院生産環境科学部門生産環境情報講座生産環境情報学研究室
Laboratory of Bioproduction and Environment lnformation Sciences, Division of Bioproduction and Environment lnformation Sciences, Department of Bioproduction Environmental Science, Faeulty of Agriculture, Kyushu Univeresity
九州大学大学院農学研究院生産環境科学部門生産環境情報講座生産環境情報学研究室
Laboratory of Bioproduction and Environment lnformation Sciences, Division of Bioproduction and Environment lnformation Sciences, Department of Bioproduction Environmental Science, Faeulty of Agriculture, Kyushu Univeresity
九州大学大学院農学研究院生産環境科学部門生産環境情報講座生産環境情報学研究室
Laboratory of Bioproduction and Environment lnformation Sciences, Division of Bioproduction and Environment lnformation Sciences, Department of Bioproduction Environmental Science, Faeulty of Agriculture, Kyushu Univeresity
Dissolved oxygen is the important factor in water area ecosystem. Generally, higher dissolved oxygen consistency is agreeable to water area ecosystem. To guard against decrease of dissolved oxygen, it is necessary to control the quantity of organic matter as pollutant source, on the other hand, it is necessary to comprehend oxygen supply to water area. The present experimental investigations were carried out to clarify the relationships between reaeration and hydraulic factors of the drop water from the weir, and reaeration coefficient calculated by the experimental investigation directed the adequate reaeration model from the anamnestic proposed models. The main findings in the present study may be summarized as in the following. The reaeration coefficient of the drop water from the weir is adaptive to the turbulent intensity model. The reaeration coefficient increase as flow raee, drop height and water depth of down stream do.