It explains the aquatic products industry briefly and presents the definition of water economy . then it establishes the model of new water economy and gives the minute description of the function of the government and the market . 5 本章从水资源的基本属性出发，对水产业的内涵及外延进行了界定；提出了现代水经济的概念，并在此基础上建立了现代城市水经济模型，指出了现代水经济与传统水经济的差异。
