@article{oai:chuo-u.repo.nii.ac.jp:00001216, author = {川村, 理史 and 岡部, 真人 and 山田, 正}, journal = {中央大学理工学研究所論文集}, month = {Mar}, note = {application/pdf, In recent years, the time comes when we discuss the city and basin that coexist with nature in various plans related to the formation of the country in Japan. Under such situation, it is recognized as a very important problem to improve the water quality and environment in the urban river. In order to clarify formation process of water quality in tidal area of urban rivers, the field observation and its results of the salinity intrusion and spatial distribution and time series of water quality in the tidal area of Kanda River, Nihonbashi River, Sumida River and Arakawa River are reported in this paper. From the results of field observation, following results are obtained; 1) BOD concentration show high value at Sotobori point and bottom layer of observation points around Sotobori point in Kanda River. 2) T-N and T-P concentration show high value at almost all observation points. 3) Salinity intrusion is a strong mixed type at high tide and weakly mixed type at low tide in Nihonbashi River. 4) After rainfall, dissolved oxygen concentration of Nihonbashi River is decreased, and it takes 6days to recover to initial concentration. 5) After rainfall, BOD Concentration of the middle parts of Kanda River is increased for 2 hours and decreased for 2 hours after BOD Concentration show maximum value. But BOD Concentration of Nihonbashi River is increased for 2days after rainfall., 【査読有】}, pages = {73--83}, title = {都市河川感潮域における水質,流動特性に関する研究}, volume = {14}, year = {2009}, yomi = {カワムラ, マサシ and オカベ, マサト and ヤマダ, タダシ} }