Hydrodynamic numerical simulation is an appropriate means for conveyance progress decision-making. Now, this project has become a new strategic water source in Beijing. In 2008, the Beijing-Shijiazhuang emergency water supply project was completed and put into operation, and a total of 1.124 billion cubic metres of water flowed into Beijing from Hebei.

Additionally, other measures must be taken to broaden sources of income, reduce expenditures, handle sewage and better utilize flood resources ( Li & Wang 2011). Thus, the south-to-north water-conveyance project is a foundational measure to solve the problem of water shortages. In addition to socioeconomic development and population increases, the shortage of water resources and deterioration of the water environment have become obstacles to sustainable socioeconomic development in Beijing ( Gan et al.

Therefore, managing the city's water resources is very challenging. Currently, water resources in Beijing are overdeveloped, as evidenced by shrinking wetlands, groundwater overexploitation and inadequate ecological water. Water resource shortages are a common problem in Beijing. Currently, this system is successfully operating in Beijing. The functionality of WGCS is illustrated through two case studies on conveyance progress. WGCS represents an effective attempt to integrate large-scale hydrodynamic numerical calculations on the web. Finally, the database platform is used to record initial information, configuration parameters, hydraulic structure parameters converted to the hydrodynamic model for computation, result data received from the hydrodynamic model for analysis, attribute data and spatial data for map publishing and visualization. Furthermore, the employment of an asynchronous refresh mechanism facilitates the performance of particle motion animation. Then, a relatively lightweight Web GIS platform without expensive mature GIS packages is implemented through rendering vector map layers based on Silverlight painting technology for model setting, simulation and data visualization. First, the pipe-channel hydrodynamic model with various types of hydraulic structure (reservoir, sluice, and inverted siphon) control equations is established as the engine to simulate a variety of flow regimes and hydraulic responses for different conveyance scenarios.

The development of WGCS involves three primary modules. We analyzed three different case studies of river system management in which numerical model simulations give a relevant contribution to the decision-making process (Isola Serafini, Po river, Italy Red river, Vietnam Secchia river, Italy).To provide support for scientific decision-making about scheduling to keep a water-conveyance project running safely in Beijing, China, a Web geographic information system (GIS)-based conveyance system (WGCS) is proposed. Models based on the shallow water equations for the liquid phase, together with the Exner equation for river bed evolution, have been used: two different numerical schemes for solving the governing equations have been implemented trying to improve model robustness and versatility. Moreover, they are time-saving and open the way to long-term analyses and implementation in optimization procedures. Provided modeling assumptions are correct, they are able to provide indicators that - despite not capturing all details - allow analyzing trends of morphological processes at reach-scale or basin scale. One-dimensional models, even though introducing simplifications in the description of hydrodynamics and sediment movement processes, do have some advantages. These latter may result in overwhelming environmental and socio-economic costs for the population and communities living along rivers, especially in developing countries: river morphological evolution cannot be neglected anymore when planning river resources use in large watersheds, and the need for tools capable of informing river managers is nowadays manifest. The research work focused on the development, testing and application of one-dimensional numerical models to river resources management and policy design issues, pointing out the key role numerical modeling can play to support river managers in the decision process where large-scale, eco-morphological river changes are supposed to occur. This thesis concludes a three-year doctoral program in hydraulic engineering.

Water conveyance system pdf