Department;
of;
Environmental;
Space;
Design,;
Faculty;
of;
Environmental;
Engineering,;
The;
University;
of;
Kitakyushu,;
Kitakyushu;
8080135,;
Japan;
Planning;
Section;
of;
Sewer;
and;
River;
Department;
in;
Kitakyushu,;
Kitakyushu;
8080135,;
Japan;