About HASEGAWA TAKASHI
About 足利工大 大学院工学研究科
About KAMIOKA MITSUO
About YOKOO YOSHIYUKI
About NAGAO MASATOMO
About 足利工業大学研究集録
About river pollution
About Watarasegawa River
About Water quality research and measurement in general
About River survey and plan
About 渡良瀬川
About 水質
About 長期的
About 短期
About 変動特性