yoshichika , the first lord of the domain , strengthened the foundations of the administration through construction of sonobe-jo castle , implementing a land survey , building the castle town , and implementing flood control measures . 初代藩主・吉親は園部城築城や検地、城下町の建設や治水事業に励んで藩政の基礎を固めた。
according to the widely-accepted opinions over the change in seawater , it results from the marine pollution caused by endocrine disrupters contained in ship bottom paint or the reduced organic matter due to the flood control measures installed for inflowing rivers . 海水の変化の理由として、有力な説は船底塗料等の中に含まれる環境ホルモンによる海洋汚染、流入する河川の治水による有機物の減少があげられている。
building barrages and dredging the river bed had only a limited effect , and it was almost impossible to improve the river further because of compensation issues , while there were growing calls for fundamental flood control measures , and demand for water was rapidly increasing due to the rapid growth of the population in the kansai region . 堤防建設や浚渫では限界が出てきており、宅地化の進行でこれ以上の河川改修は補償の観点から難しく、抜本的な治水対策が叫ばれる一方で関西圏地域の人口急増に伴い水需要も引き続き急増していた。
