| In recent years, with the continuous development and progress of science and technology, information globalization has gradually become the major trend of world economic and social development. Traditional water conservancy construction has also gradually transformed into modern water conservancy and water conservancy informatization has gained more and more attention. It is in this context, this paper can realize network intelligentization of the collection, storage, transmission, processing and servicing of hydrological information and improvethe applying level and sharing degree of water conservancy information resource on the basis of Liaocheng water and rainfall regime information platform and by the means of modern information technology.According to the investigation, there exists 145 rainfall stations, 6 hydrological stations, 14 gauging stations, 306 groundwater monitoring stations and 28 soil moisture stations in Liaocheng city, and in the past two years it has planned and constructed 20 hydrological stations, urban hydrology planning stations and early warning and monitoring systems. Among them the flood-reporting hydrological stations are all installed with DCT-1 type and YDJ-2 type flood-reporting data transmission apparatus which can automatically gatherrainfall information and transmit it to the hydrological information sub-center of the city via wireless GSM / CDMA network or wired public telephone network PSTN and after the data are inputted manually. After receiving the information, the hydrological information sub-center of the city will transfer it to the provincial hydrological information centerthrough VPN optical cablenetwork, and the hydrologiccal and rainfall messages need to be delivered to the provincial hydrological information center within 20 minutes and to the State Flood Control and Drought Relief Headquarters within 30 minutes.The construction of this platform provides a better solution to the issue of distributeddata storage of Liaocheng Hydrological Bureau. The development and use of the platform has achieved a real-time display of hydrological and water regime data, and monitoring data from the hydrological monitoring sites throughout the city can be displayed in a veryvisible way with the help of WebGIS technology. The problem of labor intensity of the hydrological staff could be solved through the realization of these functions such as the monitoring and alarm of the data of monitoring sitesas well as data modification and submissionby the aid of maps and other simple and clear operations.The construction of Liaocheng water and rainfall regime information system is committed to building a platform that could comprehensively process water regime and rainfall information and enable the users to realize hydrological monitoring, information inquiry, graphic display, report output as well as analysis and decision services by means of charts in an intuitive way. This system also aims to perfect the water regime and rainfall information processing capabilities, to enhance the water regime and rainfall information analysis and forecasting capabilities and to improve the service level and quality of the water regime and rainfall information.The technical route of the system can be simply summarized as: the use of object-oriented analysis and design method to form a plan for the application of the entire system, the use of standard three-tier structural system, the end-user side being the browser, and the application services and data being stored in the server side.The construction of Liaocheng water and rainfall regime information platform is divided into five modules: rainfall information, river water regime, groundwater conditions, soil moisture status, flood forecasting. It not only fulfills a visual display of water and rainfall regime information, but also completes storm warning, automatic drawing of contour lines, information dissemination, generation of SMS templates, flood warning and forecasting and other functions. Among them, the flood forecasting system establishes corresponding forecast scheme by analyzing the different situations of each station. The practice of using real-time water and rainfallregime information as input, and carrying on real-time forecasting offlood peak stage(flow), flood process, flood volume and other elements by starting forecasting models and methods combined with the hydrological information system to accomplish flood warning provides flood control departments at all levels with the basis for decision making.The research results of this platform are as follows:1.It has acceleratedthe transmission of hydrological information and improved forecast accuracy and forecast period,and consequently providing a more scientific basisfor flood control decision.2. Based on WebGIS, the construction of Liaocheng hydrological information system platform can improve the deficiencies of low working efficiency andfrequent presence of subjective errors, therefore, having greatly increasedwork quality and work efficiency.3.Theplatform offersreport generation, map printing and other convenient functions based on the actually reported information from Liaocheng Hydrological Bureau. Related responsible person is able to get the data report and map data needed directly generated by the platform, and thus avoiding the complicated stepsof summarizing and producing data report as well as map submissionwith the reference to database by relevant personnel and ensuring the validity of data.4.Since theplatform monitors and modifies the data with the help of maps, the operatorsdon’t have to know about computers and other related knowledge, as a result the operation is simple and convenient. The platform provides a guarantee for the improvement of service quality in hydrological industry. |
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