八潮で乗船して中川を下りロックゲートで水位調整して葛飾区から江東区に行った。江東区は地盤が低く川の水位が東京湾より1M低い。水害に強い町研究会。ウィーンの留学生アリアナは葛飾を研究中。We boarded the boat at Yashio, went down Nakagawa, adjusted the water level at the lock gate, and headed from Katsushika Ward to Koto Ward. The ground in Koto Ward is low, and the river water level is 1M lower than Tokyo Bay. Flood-resistant town research group. Ariana, an exchange student in Vienna, is researching Katsushika.