a case stud of Weihe river basin a case study of Heihe river a case study of tarim basin 城镇生态重构：以渭河流域为例：a case stud of Weihe river basin a case study of the Han River Valley a case study on yangtze river delta Section of Haihe river basin a case study of Shenzhen bay a case study of the Pearl River Delta a case study of the united states