2019 Volume 21 Issue 2 Pages 135-144
To develop a generalized method for the primary assessment of inter-levee floodplain pond environments in large Japanese lowland rivers, a generalized prediction model for freshwater mussel occurrence was built, and an application method for river management was suggested. Mussels were present in all of nine study rivers. Mussels occurred in 73 of the 363 surveyed ponds, at 1 to 21 ponds in each river. The probability of mussel occurrence was predicted using the relative height and area of each pond, with hump-shaped and positive relationships with mussel occurrence, respectively. As an example to demonstrate its application to river management, a floodplain assessment figure with a form similar to that of the discharge capacity figure, was created for the Kiso River.
