The Research Of Water Conservancy Project Of PPP Mode Contract

The different contracts of PPP mode of water conservancy projects have different effects on the efficiency and risk prevention. The paper builds the mathematical model to research cost-plus contracts and profits sharing contracts that differences in such aspects as control, risk and benefit to choose the most suitable for water conservancy project of the PPP model contracts, and the conditions of the water conservancy project of the PPP mode to apply (bondage or split of construction and operation) is analyzed. The results show that the operational water conservancy project and quasi commonweal water resources projects is suitable in binding mode under the profits sharing contract, such as BOT and DBO mode. In the profit sharing contract, with the private sector need to bear the risk of demand, therefore, the private sector can increase the productive efforts to improve the level of earnings, and indirectly improve the level of social welfare; Public welfare water resources projects suitable for cost-plus contracts. Under the premise of positive externalities in the construction and maintenance phase, DBMM binding mode is better. This is due to the binding mode to improving the quality of infrastructure and maintenance costs internalization, the influence of the construction phase of the productive efforts to improve and unproductive efforts to reduce, thereby reducing maintenance costs, and improve the efficiency of maintenance. Therefore, public welfare water resources projects integrated outsourcing social welfare is higher than the resolution model of social welfare.The current operational and quasi commonweal water resources projects in China of the PPP model of contract is mainly for profit sharing contract, through grant franchise, strengthening the cooperation of the government and the private sector, improving the efficiency of capital utilization, improving the efficiency of the PPP project.The trend of public-private partnership of water conservancy projects in recent years can be seen that profit sharing contract under BOT, DBO bundling model has become normal. Nowadays public welfare water resources projects to choose contract type is mainly split mode of cost-plus contracts. But according to international experience of the UK, Hong Kong and Australia and other international PPP model contract choice. Public infrastructure projects are choosing outsourcing kind mode of bundling of contracts for cost-plus contracts. Public welfare water resources projects using bundle model not only effectively improve the efficiency of the PPP project, also can increase social welfare. Therefore, public welfare water resources projects in our country still exists room for improvement. In addition, in the process of selecting the formulate contract, not only perfect the relevant laws and regulations of PPP, but also paying attention to the matching of the risks and benefits, keeping pace with The Times and strengthening international cooperation.