Dong Yi River Basin Water Regime Automatic Forecasting System Design And Implementation

For providing services to flood control, benefit and optimal dispatching of the project, automatic hydrological forecast system(hereinafter referred to as the System) is used to complete real-time acquisition, transmission and processing of parameters related to hydrology, flood conditions and working conditions within river basin or measurement area, by using some advanced technologies such as remote sensing, communication, computer and network etc.. For ensuring construction safety during flood season, scientific and rational allocation of water resources, fully solving the contradiction between power generation and flood control, achievement of the joint scheduling and optimal operation of cascade reservoirs and available of maximum comprehensive benefits of hydropower engineering, it is necessary to build the System of Dongyi river basin, which is one of the means to improve the economic benefit of the project and a basic goal for modernizing the management of cascade hydropower stations.This thesis, for the demand of hydropower development and construction of Dongyi river basin, combining with the characteristics of Dongyi river basin, based on investigation and survey of the System on Dongyi river basin and communication channel test, focus on the design of general structure and functions of the System, analysis and layout of remote station network, comparison and selection of communication mode and system properties, the design of data transmission network, power supply and earthing system and, at the same time, provides design scheme relevant to forecasting, central station integration, telemetry equipment integration, computer network system, database system, data receiving and processing system, business application system and information release system, which include following contents:1. Making investigation and analysis for outline of Dongyi river basin, characteristics of climate, runoff, precipitation and flood as well as project outline; collecting basic information and data for the System;2. According to design basis and principles of the System, making analysis for main functions and demands of the System, design of general structure and flow chart of the System and confirmation of each sub-system and general implementation scheme;3. Making demonstration for measurement and reporting scope of the System and, based on this demonstration, combining with layout principles of network station, making layout of remote measurement station; Making analysis and determination for selection of remote measurement equipment and main technical indexes and, finalizing the integration of equipment;4. Demonstration and description of layout principles of flood forecasting scheme; Making analysis for flood time; Making design for flood forecasting scheme related to the sites of power station and dam within the whole river basin and providing suitable model according to characteristics of local river basin;5. Making requirements for the design of hydrological acquisition sub-system and information transmission sub-system and determination of functions and main technical indexes of sub-systems mentioned above; Making selection for communication mode of the System of Dongyi river basin after carrying out analysis and comparison for routine data transmission mode and based on multi-factors such as topographical features of the river basin and economic development;6. Making requirements for the design and functions of computer network at central station, database system, data receiving and processing system, business application system and information release system; Making requirements for selection and technical indexes of network equipment in central station and system softwares and, based on this, finishing design and development of each system as well as design of network in central station and selection of equipment.