关键词: PPP模式, 融资模式, 经济激励, 协同治理, 海绵城市

Abstract: Sponge city has broad construction area and costly investment and maintenance. Under the economic downward pressure and insufficient endogenous growth motivation in China, the shortage of capital has become the bottleneck restricting its development, thus building a diversified sponge city financing system is particularly important. By literature review and case study, the Nakao river in Nanning, Guangxi and Yuelai New Town in Chongqing are selected as two typical cases in the western region after combing the research progress of the sponge city in recent years. Developed countries of the United States, Japan and Germany are discussed and analyzed on their systems and related economic incentive measures in sponge city investment and financing. Then the experiences and policy suggestions on investment and financing of sponge city in China are put forward to provide some reference and promote its construction.

Key words: PPP mode, financing mode, economic incentive, collaborative governance, sponge city