Abstract: In recent years, informatization has improved gradually in hydraulic engineering management, but it is still impossible to achieve paperless file management in a short time. Extra efforts has to be spent on the informatization system in construction sites, which somehow limits the progress and development of information technology. In addition, information in the centralized database is also easy to be tampered, limiting its use in engineering management. Block chain, featured with distributed storage and chain data structure, has shown a great potential in data tamper-proof and traceability. Based on block chain, this paper develops an improvement on the construction management system in hydraulic engineering, which involves specifying a node composition in the system, defining the categories of transactions for construction projects, presenting the data structures of transaction and block, and designing the architecture of the block chain and the system. Application scenarios for typical engineering projects are provided, demonstrating an innovation of block chain application in hydraulic engineering.

Key words: block chain, construction management, architecture, electronic signature, transaction