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The key technology of automatic water monitoring system in irrigation area is the organic combination of computer and liquid level sensor, rain gauge and gate position sensor. The monitoring system of central station, telemetry monitoring station and relay station, as well as the database management system, application software and water regime automatic Forecasting management software, etc., to achieve the automatic acquisition of irrigated water information, transmission, storage and processing integration. The functions of the system include: construction of automatic hydrological monitoring system to ensure the reliability, accuracy and timeliness of hydrological data in irrigation districts and to improve the management efficiency and economic benefits of irrigation districts; through the analysis of hydrological information (water level, rainfall amount and gate level) Automatic monitoring can make the correct scheduling decision, so as to improve water utilization rate, realize scientific water use and water conservation; achieve flood control and monitoring, and ensure the safety of irrigation and drainage systems; check hydrological and hydrological information and project information in river courses and irrigation areas Fast; information networking, sharing of resources. The system is suitable for large and medium-sized irrigation areas cited, water system automatic hydrological forecasting and dispatching management. The implementation of the system can improve the accuracy of water management, reduce labor intensity and put an end to the negative impact of human factors. The accuracy of the water level observation can be increased from 5 cm to 1 cm, which can shorten the water volume statistics interval from 1 hour to 6 minutes. Membrane irrigation technology Membrane irrigation technology is based on the film cultivation technology developed a new type of water-saving irrigation technology. That is, the use of plastic film in the field of irrigation, water flow in the process of membrane through the seedling aperture or membrane slit slowly penetrate the crop roots, local infiltration irrigation, to meet crop water requirements. Membrane irrigation technology for a variety of plastic film crops. There are many forms of membrane irrigation, the basic forms of the following: Tiling fight membrane irrigation, also known as high-ridge low-profile membrane ditch ditch irrigation membrane. Is the use of filming drill installed in front of the device, scraping the surface 5-8 cm dry soil, the film bed on both sides of the ridge to build 15 to 18 cm high, forming a ditch 畦. Furrow irrigation ditch membrane irrigation. This form is to use a film machine to spread the ground film, buried on both sides of the ground. Before the irrigation between the two films with a ditch to open a ditch dwarf Fu Yang membrane irrigation. Spread the film into a trapezoidal cross-section (5 cm on both sides of the tilt into the soil), 埂 high 15 to 18 cm. Membrane can be used membrane perfusion film machine to complete. Ditch the irrigation of the inner membrane. Ditch the land into the ditch, furrow 25 to 30 cm. The film shop in the ditch and soil Tuo on both sides. Film slit irrigation. This form, in contrast to the previous method of filming on the inner lining of the furrow, places the film on the ridge of the ridge and the adjacent two films form a filling gap at the bottom of the furrow. 6. Tiled edging small field membrane irrigation. Plastic film cultivation will be implemented when the tile flat soil pressure, through the hole and the membrane seedling seepage irrigation. Membrane irrigation mechanism: can effectively prevent the loss of deep leakage. As the membrane irrigation through the release of seedlings or film slit irrigation, vertical soil water area is small, only 13% to 15% of the total area, so less deep leakage. Field ineffective water evaporation reduced. As the plastic film to avoid soil surface soil evaporation, good effect of soil moisture. Weeds with less irrigation film, reducing weeds water. The use of the Xinjiang Uygur Autonomous Region shows that cotton can generally save about 30% water film irrigation, an increase of 5% to 8%. In addition, the reduction of irrigation quotas can also play a significant role in preventing the rise of groundwater levels caused by irrigation and soil salinization. The underground drainage and drainage technology uses a combined underground drainage system to reduce groundwater level and play a role in drainage when the soil moisture is too high. When the soil moisture is insufficient and crops are affected by drought, the same set of engineering systems can be used to transport irrigation water, Elevated groundwater level, the implementation of infiltration irrigation, in order to replenish the soil moisture to meet crop water requirements. In the groundwater quality is good, soil salinization threatened areas, using this technology can save engineering investment, and achieved good results. The technology is based on the open ditch system, the application of underground pipe and blind ditch (fill in the trench drainage material, the upper cover of the original soil) or combined with the rat lane, or add a rat network, network form field Shallow underground drainage and irrigation engineering system. Drainage, the excess water in the soil through the system gravity flow into the open ditch. When irrigating, water enters the system from the ditch net, enters the ground, raises the groundwater table, and feeds on the crop root system by capillary action. Its engineering specifications, depending on the soil and other conditions, such as sand in the Huaibei Shajiang black soil, should adopt dark tube, the spacing of 20 to 30 meters, depth of about 1 meter, corrugated plastic pipe can also be used, diameter 7 cm, Filter. Blind ditch between the vertical arrangement of blind or additional spacing 3 ~ 5 meters, about 0.5 meters deep rat net. This technology is suitable for shallow groundwater level, irrigation water is guaranteed, drainage outlet, soil salinization threatened areas, such as the Huaibei Shajiang black soil areas and other areas need irrigation and drainage similar conditions. Practice has proved that the use of this technology can increase 11% to 17%. Underwater welding technology Underwater welding technology can be widely used in culverts and pumping station maintenance work. Underwater welding First of all divers to find the location to be underwater welding. Using 25 mm2 copper cable connected to the workpiece. Torch "negative" through the cable connected with the torch into one. Underwater welding, the welding rod should first be based on the thickness of the appropriate choice of electrode diameter and welding current, the welding torch through the solder wire solder in the rear of the weld gun hole, the other is then connected to the weldment , Forming a closed loop. When the electric arc ignites the arc under water, the electric arc causes the weldment to create a pool of molten metal and allow the molten droplets of the electrode to drip into the molten pool. At the same time an air pocket is created around the electric arc to isolate the water and the arc so that the arc can burn stably in the water. The technology can be widely used in various types of hydraulic structures, hydropower stations, pumping station metal structure of the welding reinforcement, so that it can be resumed in a relatively short period of time normal operation. Especially in flood season, the timely restoration of the normal operation of hydraulic structures is of great significance to the flood safety of hydraulic structures. Can also be widely used in industry, bridges, civil construction, shipbuilding underwater operations.