Questionnaire on Judgement by People for River Improvement

Abstract

River Watarase is the largest tributary of River Tone, and has drainage area of 2, 602km². The range of direct control of the Ministry of Construction is from confluence to 56km upstream. An improvement of flood plain has been in progress around 48km as a water-front development in Kiryu district and another improvement of river channel is also in progress at River Kiryu, a tributary of River Watarase. By the improvement of flood plain, a large area of vegetation has been changed into a park and multi-purpose grounds. The type of improvement of river channel at River Kiryu is flattening of channel bed and carrying out the work of bank protection. The valuation of people for the improvement was investigated using questionnaire.