The comprehensive utilization of water conservancy projects adopts the PPP development model, which not only introduces social capital to alleviate government debt pressure, but also utilizes the management technology of social capital to improve the level of engineering construction and operation management and the quality of social services. This article explores the profit losses during the implementation of public welfare emergency dispatch, reduced irrigation water demand in flood years, and adjustments to operation dispatch rules caused by major public activities under the "BOOT+BTO" operation mode of water conservancy PPP projects. Based on the modified total cost method, the function model and constraints of franchise profit losses are analyzed. The Copula function theory is used to analyze the joint profit losses of electricity generation and water supply profits, and a joint profit loss calculation model for the "BOOT+BTO" mode of water conservancy projects is constructed, providing a theoretical basis for governments and PPP project companies to scientifically implement emergency dispatch and reduce joint revenue losses.

Within a three-level engineering supply chain that includes the owner, general contractor, and subcontractor, the optimal quality control strategy of the owner under symmetric, asymmetric, and incomplete information was studied. Using the quality control level of the general contractor and subcontractors, as well as the quality supervision level of the general contractor, and the quality supervision level of the owner as decision variables, and the cost function of each party as a quadratic function, the optimal quality control strategy of the owner under symmetric and asymmetric information is derived based on the maximum value method and Lagrange multiplier method. Under incomplete information, the optimal quality control strategy of the owner is derived when the probability density function of the general contractor's quality control level and quality supervision level follows a triangular distribution. Through simulation calculations, the results under different information conditions were analyzed.

In order to address project delays caused by uncertain factors in the construction project schedule management process, a new method for calculating the size of critical chain buffers is proposed. Taking into account process uncertainty and based on the GERT network, the correction process and duration of different logical processes are provided to transform the uncertain network into a deterministic one. By combining the critical chain management method and information entropy theory to assess the impact of increasing uncertainty in the merging process on the critical chain buffer, a calculation model for the critical chain buffer size based on the GERT network is established and analyzed using a numerical example. The feasibility and effectiveness of the model are verified through an example, demonstrating its ability to reduce project risks and shorten the construction period while ensuring a high probability of project completion.