About short time probability rain strength type in Saga region
It is necessary to calculate the plan rainfall that accepted plan scale to calculate flood flow rate to become the basics on planning river improvement countermeasures.
Because there are many rivers of small and medium size scale with basin area 50 square kilometers or less in the river which this prefecture manages, we demand the rain strength using probability rain strength type at time for short time and come to often calculate flood flow rate.
In addition, because big things and small things of the rainfall greatly influence geographic factor in addition to climatic condition such as position of front or course of typhoon, we grasp the area characteristic from the past rain results in this prefecture and greatly divide the prefecture to three and set probability rain strength type for local short time of each.
Process of revision
We considered the recent rain characteristic by analyzing the rain information until December, 2010 in the rain information used for "short time probability rain strength type in Saga region" that probability rain strength type was set for a short time in March, 1980 about revision more this time and considered about the local rain characteristic generally.
"For a short time probability rain strength type in Saga region" (March, 2012 revision) (1,038KB, PDF file)
The application date
We apply after April 1, 2012.
※Probability rain strength types are as follows for past short time.
"For a short time probability rain strength type in Saga region" (March, 1980) (451KB, PDF file)