Research Of Comprehensive Analysis Platform For The Middle Route Of Southe-to-North Water Transfer Project During Freezing Period

The South-to-North Water Transfer project has the risk of producing ice jam and ice dam during winter. Operation security of the ice age is concerned with all aspects of the engineering running and managing. It is not enough that only basing on person protection, object protection ensure the safety of the channel. Not less than 5000 sensors and engineering equipment are placed to monitor the real-time conditions of the channel. However, it is lack of technology to effective use of these sensors and engineering equipment to guarantee the security of channels. This articile will combine project’s demends which includes exception identification, early warning, traceability and emergency with the multi-source sensor information using, using theory analysis, numerical modeling, picture processing etc methods, on the basis of thorough analysis water diversion in ice age mechanism and process,deeply analysing comprehensive analysis platform in the ice period. The main contents and research achievements include:(1) The risk and ice comprehensive analysis ability of middle route of south-to-north water transfer project during freezing period were studied. The article summarized the midline main ice damage types,proposed an new anormaly pattern classification method which accords to the cause of disaster and determined the form of anormaly pattern:ice accumulation abnormal pattern, unsteady-ice jam accumulation abnormal pattern and natural-ice accumulation model. Then, though summarizing previous research results, experiences builded reasonable, perfect index system and determined the various index threshold. Based on numerical simulation, video image processing technology builded the anomaly pattern recognition, early warning flow path.(2) the spatial distribution of the risk of ice disaster on BeiJing—ShiJiaZhuang were studied. Basing on the mechanism of ice jam, the quantitative method of geographical conditions are improved, the spatial distribution of ice disaster risks of unit channels and sections are studied with fuzzy evaluation theory. Results show that the risk of ice disaster of unit channel can be divided into five levels, and the risk of Xi Hei Shan regulator-Pu He regulator channel and Fen Zhuang He Regulator-Nan Ju Ma Regulator channel are largest.(3) Coupling the theory of hydrodynamics, ice mechanics, thermodynamics constructed the midline ice evolution numerical model and the model is verfied. By establishing channel’s heat conduction equation of gas. water, ice, water temperature control equation, unsteady flow equation of motion, ice transport and development equation constructed the mainline’s one-dimensional ice numerical simulation model. the model can simulate the beginning of melting ice,ice development and the total process of ice. Using measured data which comes from ice daily run record calibrate the model. The validation results shows that the simulation results are in good agreement with the measured data, the model calculation accuracy can meet the requirements of calculation analysis and engineering application.(4) the ice numerical simulation model of real-time correction were studied. Kalman filtering technique combined with water temperature simulation process, choose the water temperature as the state vector and calibrate typical channel’s the water temperature simulation process. To the midline glaciation image as the research object, proposed using the image processing technology corrected the model.