English: Ookashiwagawa river (in north area of Ichikawa city, Chiba Japan) water volume comparison. (Left photo: Water full almost overflow or overtopping the bank to pondage, remain only 20 cm height, after Heavy Rain when Pacific typhoon No.9 approaching on 10 Aug. 2009 9:32, Right photo: Normal water stream/volume))
English: Ookashiwagawa river water volume comparison (Left: Water full after Heavy Rain when Pacific typhoon No.9 approaching on 10 Aug. 2009 9:32, Right: Normal water stream) 日本語:大柏川の推量比較(左:2009年台風9号接近の豪雨�