@article{oai:nagano-nct.repo.nii.ac.jp:00001036,
 author = {酒井, 美月 and 阿部, 卓也},
 journal = {長野工業高等専門学校紀要, Memoirs of Nagano National College of Technology},
 month = {Jun},
 note = {application/pdf, The change of nitrogen concentration in Chikuma River and Torii River was analyzed two years. The concentration in both rivers changed due to land use of the catchment area and the seasonal. It is estimated the load from monthly data of river flow and survey concentration data. Total water flow rate changed due to snowfall, snow melt or increasing of summer rainfall has been confirmed that it effected the load of nitrogen in each river; especially nitrogen load was high from March to April and from July to August. According to the flowing down, nitrate (NO₃-N) and ammonia nitrogen (NH₄-N) with anthropogenic source was increased. Land uses of the catchment by GIS and nitrogen concentration have strong correlation between proportion of paddy fields and Total organic nitrogen, urban area and NO₃-N, respectively.},
 title = {鳥居川流域を対象とした窒素化合物の季節・地域変化に関する検討},
 volume = {52},
 year = {2018}
}