The uneven distribution of water resources in time and space restricts the development of society, which is a universal problem facing the world. To improve the ability to regulate water resources in water diversion projects and alleviate the contradiction between water resources and social development, China has decided to build water network projects (WNPs). A WNP is an integrated water supply system that includes multiple water sources and network water supply lines and integrates the functions of water supply, water delivery, and optimal allocation of water resources into a system that can supply water to many users. An appropriate water pricing mechanism is the key to ensuring the sustainable operation of water network projects. This paper presents a comprehensive water pricing model (WPM) for WNPs. The purpose of this model is to unify the water price measurement standard of WNPs and lay the foundation for water price marketization in the future. By applying the model to the Jiaodong WNP, it is found that the model is expected to improve the unbalanced use of water sources and the large difference in prices at water supply points (WSPs) in the project. This study not only provides a theoretical basis for water pricing reform but also has great potential to improve the efficiency of water resource use.

This study presents part of a pilot work for the structural health monitoring of a large tied-arch reinforced concrete aqueduct in eastern China. Based on field-monitored data for over a year, it mainly focuses on the effect of air temperature and water load variations on the static behavior of a typical span of the aqueduct through field monitoring and 3D FE model analysis. It is found that the longitudinal deformation of the composite tied-arch shows a good linear relationship with the air temperature during the non-operation period and also has a good bilinear correlation with the air temperature and water level during operation. However, isolation of the air temperature effect from the second bilinear correlation using the first linear relationship results in a poor correlation between the longitudinal deformation and water level due to the dominance of the temperature effect. Therefore, it is recommended to use the bilinear regression to predict the longitudinal deformation of the tied-arch during operation. The vertical deformation of the tied-arch is insignificantly affected by air temperature, whereas it shows a fair bilinear correlation with the air temperature and water level during operation, which can be used to provide a reasonable estimation of the vertical deformation of the tied-arch. The strain measurements of the tied-arch using vibrating-string gauges are more complicated due to the notable influence of the ambient temperature and solar radiation, but the relatively consistent bilinear regression of the strains versus the air temperature and water level can still give fair predictions for the strains of the bottom tension rods during operation. The 3D FE model can provide a fair estimation for the vertical deformation of the tied-arch under water load, but its predictions for longitudinal deformation and strains are less satisfactory when compared to monitored data excluding temperature effects.

The water chemistry characteristics along the Jiaodong water transfer line and its impact analysis play an important role in supporting water quality safety and operation management. In this paper, the water chemistry characteristics along the Jiaodong water transfer project were studied, and the water chemistry characteristics and their influencing factors in the study area were analyzed by using Piper's trilinear diagram, Gibbs diagram and SPSS26 statistical analysis software for correlation. The results show that the surface water and groundwater along the Jiaodong water transfer project are both weakly alkaline, and the chemical type of groundwater in the traversing area is Na Ca-HCO-3 water, while the chemical type of surface water is Na Ca- HCO-3 water. The groundwater in the crossing area of Jiu Dong water transfer project is mainly controlled by rock weathering and evaporation concentration, and the water chemistry type of groundwater in different areas shows certain differences; the correlation between the channel water and groundwater and surface water along the route is weak in water quality, and surface water and groundwater basically have no influence on the water quality of channel water transfer during the normal water transfer period; the groundwater quality along the route basically has no corrosive influence on concrete, and the groundwater quality has no corrosive influence on Groundwater quality has no corrosive effect on concrete, but groundwater quality has some influence on reinforcement and steel structure in concrete.