2012.4-2013.3 Yearbook of NILIM
Research Summary


Environment Department

Reference Number Y120102
Title Research on environmental conservation of estuary suffering topographic change
Start-End Date 2012.4-2013.3
Division River Environment Division
Author Head, Yoichi IWAMI
Senior Researcher, Keigo NAKAMURA
Research Engineer, Masataka HAGA
Summary In this research, we collected the data of geomorphology, water quality, bed material and biology on five major rivers along the Pacific in Tohoku district, and analyzed the influence of the Great East Japan Earthquake. Comparing the geomorphology in riverine estuary before and after the earthquake, we found the decrease of intertidal area and the reduction of reed community in the Kitakami River. The influence on water quality by the earthquake was rarely observed.