It is necessary to conduct EIA even at photovoltaic power plants（PV）. However, efforts by national and local governments are delayed. Even so, we have practiced simple & voluntary EIA for PV. Based on those experiences, I will provide topics on environmental problems and tendency of residents' opinion about PV.
The objective of this study was to develop a method for assessing tidal flat ecosystems. We focused on crab-feeding birds, the top predator on tidal flats. Distribution of mud flat crabs is generally affected by substrate conditions, such as grain size and soil water content. Therefore, habitat suitability for crabs is likely able to be evaluated by measuring substrate condition. We documented the distribution of the burrowing crab Macrophthalmus japonicas, and developed two Habitat Suitability Index （HSI） models based on 1） the number of crabs and 2） their burrows. Scores of the two HSI models for the crab were both correlated with the number of individuals of two crab-feeding snipes （Heteroscelus brevipes and Numenius phaeopus）. Our results suggest that the distribution of crab-feeding birds can be assessed based on habitat suitability for their prey.
The discharge of the Kitakami River fluctuates very sharply, from just a few m3 / sec during dry periods to about 4000 m3 / sec following a typhoon. During times of drought or extended dry periods the water in the estuarine area becomes oxygen-deficient., which adversely affects the Yamato-shijimi; heavy flows from the Kitakami River also have an impact on the cultivation of marine species in Oppa Bay.This report describes how we used numerical simulation models and observations of currents, water temperature, DO, salinity, SS etc., to estimate the influence of the river flow during periods of heavy flow and the reduction in oxygen-deficiency attributable to the diversion facility.