Secondly, the very nature of water, with its natural, economic and social dimensions, requires a multidimensional allocation mechanism of government control, market regulation and water users 'organization so as to avoid government failure, market failure, technology failure and negative externality. 水具有的自然、经济、社会多种复杂特性,要求水配置要采用政府、市场、用水户组织为主体的多元配置机制共生的机制,以克服政府失灵、市场失灵、技术失灵和外部性;