This paper analyzes on the factors influencing the book acquisitioning quality and fund benefit from aspects of the acquisitioning subject, acquisitioning mode, acquisitioning tactics, acquisitioning technology, acquisitioning fund, and book publication, etc.

Based on the investigation of the investment in and profit from the flood control system, the benefit of the system for a special period or a year was evaluated with the ratio of economic benefit to expense and net benefit taken as the indexes.

Cost-benefit analysis of project with mode of collecting water from middle layer of water body by culvert pipelinet;