Besides the water price, the concession term is one of the most important aspects in the urban water BOT concession contracts.

Based on the game theory and its methods,this paper analyzes the decision-making when it comes to the concession term in urban water supply BOT projects,establishes a dynamic game model of complete information between the investor and the government,and finds the optimal decision-making model by deduction,thus providing a systematic method for determining the concession term.

This paper sets up a model in which the project company decides its investment scale and the government decides the concession term under the condition that demand increases constantly with time.

Research on the determination of concession period for PPP project;

A Study on Reasonable Traffic BOT Projects Concession Periods Determination Basing on Monte Carlo Simulations;

However,at present many BOT projects involve excessive government guarantee and project renegotiation,which have a damage on social profits,and the main reason is that the incentive role of BOT projects has not been fully played,especially the role of the concession period of the BOT project as an incentive method has not been embodied.

Taking the contract terms of water price adjustment during licensed operation period of investment project for the Guiyang Xiaohe Wastewater Treatment Plant and the practical operation as example,the risk and avoidance modes in investment projects for WWMP were analyzed.