This year, the Social Experiment Programme in theYamato-gawaRiver Basin was held in whole February, duration of one-month. This is four times of one week, the duration of the event in the Social Experiment Programme up to last year. How about the water quality improvement in the event of the Social Experiment Programme?Press releaseof the Social Experiment Programme has not been opened yet. I have conducted simple analysis of the water quality monitoring data.
The BOD graph shows BOD degradation in February 2011 comparing to recent two years and recent two months. The flow rate atOriono-bashiBridge, the nearest monitoring point to the river mouth, is included in the graph. The flow rate data shows smaller flow rate in February, 2011, which may affect the larger BOD concentration.