69 results about "River management" patented technology

The invention relates to a multi-functional river management hull robot. The multi-functional river management hull robot comprises a hull robot main body, a garbage cleaning unit, an oxygen aeration unit, a random detection unit, an intelligent drug delivery unit, an automatic filter unit and a control center; and the control center is connected with the oxygen aeration unit, the random detection unit, the intelligent drug delivery unit and the automatic filter unit through a wireless mode, the control center receives the pollutant data sent by the random detection unit and sends instructions to the oxygen aeration unit and the automatic filter unit to turn on or turn off the oxygen aeration unit and the automatic filter unit, and the control center sends the instructions of opening a corresponding agent unit valve to the intelligent drug delivery unit, so that agents of a corresponding agent unit are sprayed into a river to achieve treatment of pollutants. According to the multi-functional river management hull robot, the pollutants in the river can be cleaned completely in one effort, the solar energy and the wind energy are used as power generation ways, the problem that equipment power supply depends on the battery capacity or being close to power facilities is solved, and the functions of automatic cruise and obstacle avoidance are achieved.

The invention relates to a method for dredging and management and ait construction, which belongs to the techniques of environment protection and hydraulic engineering. The method comprises the following steps of: protecting dikes along both shores of a river by a light and hard shell dike method; arranging a nose dike in the middle position of the gradually-wide section of the river along the upstream end of a longitudinally ridged sand sill; according to the shape of the sand sill, hard shell sheet piles gradually extending to the downstream along both sides of the nose dike to form an aequilate river surface; inserting sheet piles, connecting the sheet piles into a whole, throwing the dredged mud into a range surrounded by the hard shell sheet piles, and then gradually forming a man-made island; marking a helix-shaped man-made bay on the downstream of the gradually-narrow section of the river to form a fixing sand point on the sudden-widen river; and then planting and fixing sand on the man-made island. The invention aims to satisfy the functions of flood discharge, tide suppressing, irrigation, water storage and navigation, and also can establish stable man-made islands and marsh parks. The invention has the advantages of dike stabilization, reduction of sand accretion, utilization of natural energy, and increase of earth resources, and is suitable for various types of river management.

The invention provides an intelligent river management platform based on BIM+GIS. The platform comprises a business application system, an information acquisition system, a support platform system, a document management system, a data integration system and a basic service system, wherein the business application system comprises a daily work management platform, a daily inspection and management platform, an emergency event management platform, a monitoring data management platform, a digital transfer platform, a geographic information model platform and a management driving cabin, the support platform system comprises a basic information maintenance platform, a digital transfer platform, a three-dimensional GIS platform and multiple automatic auxiliary decision-making generation tools, and the basic service system comprises a system software layer having multiple types of application software services, a hardware structure layer and a basic network layer. The platform is advantaged in that 24-hour real-time monitoring of the river water quality can be realized, river treatment equipment can be controlled with pertinence according to the feedback field water quality information, and informatization, intelligentization and high-efficiency monitoring modes of river water systems can be realized.

The invention relates to an environmental-protection-oriented ecological reservoir capacity determination method for a combined scheduling reservoir group, and belongs to the technical field of environmental protection and comprehensive utilization of resources. Firstly, according to river ecological flow and water demand requirements regulated by a river management department, optimization objectives and constraint conditions are determined, a reservoir group ecological water utilization schedule optimization model is established, a weight set with multiple objectives is randomly generated and solved, and an optimal water supply scheme meeting a specific coordination value of the human social economy and ecology water lacking rate is determined; secondly, regulated reservoir capacities needed for water supplement of all reservoirs annually are calculated, and regulated reservoir capacities with the 90% guaranteed rate are selected; at least, regulated reservoir capacities without ecological objectives are worked out, and the difference value of the regulated reservoir capacities without ecological objectives is determined as the ecological reservoir capacity. The method has the advantages that the defect that ecological water supply is not taken into consideration in traditional reservoir group scheduling reservoir capacity setting is overcome, more reasonable reservoir capacity can be obtained according to the reservoir group ecological water utilization schedule optimization model and situational analysis, and implementation of reservoir group ecological scheduling rules is guaranteed.

The invention discloses a nano-bubble generating device. The nano-bubble generating device comprises a gas-liquid mixing pump (1) and a cavitation generator (2); the gas-liquid mixing pump (1) is provided with a first inlet (15), a second inlet (16) and an outlet (17); a liquid can flow into the gas-liquid mixing pump (1) through the first inlet (15), a gas can flow into the gas-liquid mixing pump (1) through the second inlet (16), and the outlet (17) is communicated with the cavitation generator (2), thus a gas-liquid mixture flowing out of the gas-liquid mixing pump (1) can be changed into bubbles with nanoscale diameters after flowing through the cavitation generator (2). The nano-bubble generating device disclosed by the invention can achieve a good effect in the aspects of sewage treatment, aquaculture, river management and pollution remediation.

The invention discloses an intelligent monitoring and management system and method for river water pollution monitoring and early warning and belongs to the field of monitoring technologies. With theintelligent monitoring and management system and method adopted, the problems of high manpower consumption, long monitoring period, and low river pollution control efficiency of existing river monitoring can be solved. According to the technical schemes of the invention, the system includes a network communication module, a water and rainfall information monitoring module, a water quality monitoring module, a gate pump monitoring module, a video monitoring module, a monitoring center, a river management module and a user terminal; the network communication module includes a GPRS network and anoptical fiber network; the water and rainfall information monitoring module includes a water and rainfall information monitoring device and a water and rainfall information monitoring center station;the water quality monitoring module includes a water quality monitoring station and a first server; the gate pump monitoring module, the river management module and the user terminal are all connected with the monitoring center; and the video monitoring module includes a video collection device and a second server. With the intelligent monitoring and management system and method for river water pollution monitoring and early warning adopted, river water pollution can be monitored in real time, and the efficiency of river water pollution control can be improved.

The invention discloses a wireless sensor network technology based method for designing an inland-river management information system. The system mainly comprises a shipborne information acquisition and display platform, a water environment acquisition analysis unit, other information acquisition units, a network base station, a middleware system, a local navigation networking management center and an internet management center. In the invention, through arranging a lot of various kinds of sensors on inland ships, on buoys or floats in a navigation channel, on bridges, on elevated antennas and under the inland-river water or on the river bed and through carrying out multi-hops self-organized network by utilizing a Zigbee network communication protocol, a comprehensive and tridimensional monitoring of the inland ships, the navigation channel and the water area can be realized; therefore, the navigation safety of the inland ships and the environmental cleanness of the inland waters can be guaranteed.

The invention relates to the field of river surge treatment, in particular to a method for preparing a dominant microbial solid bacterial agent for river water pollution control, which includes acclimating microorganisms, preparing a composite bacterial liquid, selecting a carrier and preparing a solid bacterial agent. On the one hand, before the preparation of the solid bacterial agent, the microorganisms were domesticated, and the obtained microbial mixture had an absolute advantage in enriching and cultivating the target bacteria, and the concentration was high. The microorganisms in the solid microbial agent could well colonize in the water body. It is conducive to improving the quality and efficiency of subsequent water pollution treatment; secondly, the solid bacterial agent is prepared by adsorption or embedding, the environmental requirements are not harsh, the reaction conditions are mild, and the operation is simple. The microorganisms in the composite bacterial liquid can be combined with the carrier The combination is tight, and the concentration of microorganisms in the prepared solid bacterial agent is high; in the third aspect, the carrier has a particle size of 1-3mm and a density of 1.1-1.5g / cm 3 The special ceramsite or molecular sieve carrier for porous organisms is non-toxic and has good biocompatibility, which is conducive to material transmission and exchange.

The invention discloses an automatic monitoring system for monitoring the pollution state of a running river area based on Internet of Things. The automatic monitoring system comprises a sectional type running river management region, fixed point monitoring devices and a running river management central machine room, wherein the sectional type running river management region is divided by the running river area according to a jurisdictional area; the fixed point monitoring devices are arranged on both shores of the running river area and are provided with water quality real-time monitoring devices which are submerged in the water; and the running river management central machine room comprises a cloud server, and the fixed point monitoring devices are in wireless communication connection with the cloud server through an Internet of Things card module. According to the system, the running river area is divided into multiple regions by virtue of fixed point monitoring design, a pluralityof the fixed point monitoring devices are arranged in each region, each fixed point monitoring device is used for uninterruptedly acquiring water quality conditions of the position on which the fixedpoint monitoring device is located in a timing manner, and the systematized monitoring with the cloud server is realized by virtue of a wireless communication function of an Internet of Things card,so that managers of the running river management central machine room and the sectional type running river management region can know the water quality condition of the running river area in real time, and the real-time, rapid and effective management of the running river area is realized.

The invention relates to an environmental-protection-oriented ecological reservoir capacity determination method for a single water supply reservoir, and belongs to the technical field of environmental protection and comprehensive utilization of resources. Firstly, according to river ecological flow requirements regulated by a river management department, optimization objectives of a reservoir ecological water utilization schedule are determined, optimization variables and constraint conditions are combined, a reservoir ecological water utilization schedule optimization model is established, a weight set with multiple objectives is constructed, and the multiple objectives are simplified to a single objective for solving; secondly, an optimal water supply scheme is determined according to analysis of the economic society and ecology water lacking rate; at last, the ecological reservoir capacity is calculated according to optimized economic society and ecology water supply output. The method overcomes the defect that ecological water supply is not taken into consideration in traditional water supply reservoir capacity setting and meets the demands of reservoirs for ecological water utilization scheduling in the future; the result is figured out according to the optimization model, more reasonable reservoir capacity can be obtained, and the method has the advantages of being clear in theoretical significance, high in maneuverability and easy to apply practically.

The invention discloses a siphonic weir capable of controlling a water level automatically. The siphonic weir comprises a barrage for intercepting water flow and forming an upstream riverway and a downstream riverway and a water pipe arranged on the barrage. The water pipe penetrates through the barrage. The water pipe comprises an upstream pipe body and a downstream pipe body. The upstream pipe body is provided with a water inlet arranged at the upstream riverway, and the downstream pipe body is provided with a water outlet arranged at the downstream riverway. The water pipe is provided with a top end, the height of the top end relative to the bottom of the barrage is larger than that of any position of the water pipe relative to the bottom of the barrage, and the top end is higher than the water inlet and lower than a water overflowing position of the barrage. The water inlet is higher than the water outlet. The siphonic weir can control the river water level automatically, discharge flood automatically and reduce river management cost.

The invention discloses a river health management method and system. The river health management method comprises the following steps: step 1, collecting and checking the position of each sewage draining exit in a river and management enterprises corresponding to the sewage draining exits; 2, arranging a plurality of detectors in the river, wherein the detectors are used for detecting the pollution degree in the river and collecting the positions of the detectors; 3, drawing a virtual electronic map; marking the position of the sewage draining exit and the position of the detector in a virtual electronic map; and 4, according to the traceability model and the detector, analyzing a sewage draining exit corresponding to the river pollution source, marking the sewage draining exit, notifying a manager to treat the river pollution source, and monitoring the river through data transmitted by the detector, so that the situation that the manager of the river needs to slowly find out the pollution source when river pollution occurs is avoided. The troubleshooting time of river management personnel is reduced, and the difficulty of pollution tracing is reduced, so that the river management becomes simple, quick and convenient.

The invention relates to a river management method and river management equipment, in particular to a method for realizing river-health diagnosis and equipment for realizing the method, belonging to the field of river management in the services of water conservancy departments. The method of the invention comprises the following steps: validating user permissions and priorities; selecting river channels and setting related parameters; calculating the health indexes of river reaches and the whole rivers; carrying out etiological diagnosis so as to obtain rehabilitation measures and suggestions; finally, sending the diagnosis result. The equipment for realizing the method comprises terminal equipment, gateway access equipment and river-system information service equipment. The method and the equipment of the invention have the advantages of solving the timeliness problem of river-health data collection and diagnoses, making the users achieve the purpose of saving time, labor and money, and improving the service images of the water conservancy departments.

The invention relates to a device suitable for planting deep-water plants. The device comprises a sinking bed frame and a buoyancy system, wherein the buoyancy system is connected with the sinking bedframe through a rope, the rope is provided with a counterweight stone, and the inner portion of the sinking bed frame is provided with a matrix carrier. The device suitable for planting the deep-water plants has the advantages that not only is the problem of deep-water sinking plant planting solved, but also emergent aquatic plant planting, artificial aquatic plant microorganism coating and othertechnologies are combined, so that the purification ability of the water body is greatly improved, the construction is convenient, the landscape effect is good, and the device can be promoted and applied in river management.

The invention discloses a system and a method for comprehensive management of a plain subcritical flow and beheaded branch river water body and belongs to the field of water environment management. The system comprises a filtering treatment device and a jet-flow lifting device; the method comprises the following steps: lifting a water body of river water to the filtering treatment device on an embankment by utilizing the jet-flow lifting device; then carrying out combined purification of physical filtering and biological degradation; enabling the treated water to self-reflow back to the riverwater, so as to form circulating treatment of the plain subcritical flow and beheaded branch river water body. Aiming at the problem that an existing plain subcritical flow and beheaded branch river management technology is poor in the purification effect, the invention provides the system and the method for the comprehensive management of the plain subcritical flow and beheaded branch river waterbody. By adopting the system and the method, disclosed by the invention, the problems that the water quality of a plain subcritical flow and beheaded branch river is worsened, and algae and duckweedbreak out can be remarkably improved and continuous improvement of the water quality is realized.

The invention relates to the field of river management, in particular to a superior microbial acclimation method used for river water pollution management. The superior microbial acclimation method comprises the steps of microbial acclimation stoste preparation, enriched medium preparation and microbial acclimation. According to the method provided by the invention, a microbial acclimation stoste is prepared according to actual conditions of the water sample and the bottom mud of a river to be managed, then an enriched medium is prepared, and finally, through repeated and continuous microbial acclimations and cultivations, a microorganism mixed culture is obtained. In the microorganism mixed culture, enriched cultivating goal bacterium has absolute advantage. On one hand, the acclimation process is simple, the operation is easy, and the cost is low, and on the other hand, goal bacterium can quickly survive, adapt to environment and propagate, environmental requirements are low, acclimated goal bacterium is high in content and has an absolute advantage, and the effect of river water pollution management is good.

An urban river course management system, including a clear water area, a sewage treatment system and a reclaimed water treatment system. The clear water area adopts the original river course, divides the urban river course into several sections, and builds dams to store water in each section. Under the dam body (8) There are drainage holes (7); the reclaimed water treatment system is to build reclaimed water canals (1) on both sides of the river section between the reclaimed water discharge outlet and the entrance of the downstream reclaimed water collection lake, and the middle and upper parts of the reclaimed water canal (1) are equipped with sewage The collecting pipe (2); the downstream side of the dam body (8) is provided with a connecting canal (6) connecting the canals (1) on both banks; the node (4) between the canals (1) in the two sections of the river is equipped with guides The valve (3), the reclaimed water channel (1) is connected with the connecting channel (6) through the pilot valve (3); a multi-stage biological purification system is arranged downstream of the reclaimed water channel (1). The present invention adopts the methods of "segmentation and governance", "water division and governance", "cross-strait communication" and "three water diversions" to control urban rivers, effectively improve the water quality of rivers, and enhance the charm and image of urban rivers.

The invention discloses a trash collecting and treating device for lake and river management, which comprises a main casing body. Two side upright plates are fixedly mounted in an inner cavity of themain casing body. Four convex rails are symmetrically mounted on the surfaces of the side upright plates. Sliding blocks are slidably arranged on the surfaces of the convex rails. Every two sliding blocks are fixedly mounted at the two ends of one side of a clamping plate, and a screw rod is arranged between the two sliding blocks. The screw rods fixedly sleeve the ends of output shafts of first motors. The first motors are fixedly mounted on the side faces of the side upright plates. A dragging box is fixedly mounted between the two clamping plates. Three steps of crushing, smashing and breaking trash are completed by transmission among a third motor, transmission rods and belt pulleys, thereby greatly reducing the number of the motors and power loss required by the trash collecting and treating device, and the device has certain economy. A trash outlet and a sewage outlet are disposed to effectively classify the trash and sewage in the trash, thereby facilitating subsequent collection in trash treatment.

The invention discloses a new river health evaluation method. The method comprises the following steps: step 1, screening ecological indexes for evaluating river health according to the characteristics of a river and the change of a cascade barrage to the river; 2, carrying out continuous and long-term monitoring on the screened river indexes; 3, calculating an index based on the collected data, and defining the change condition of the deviation index of the index after the index is compared with the natural river; 4, dividing index grades according to the characteristics of the deviation degree indexes; and 5, comprehensively evaluating the influence condition of the river health of the cascade barrage. Through positive and negative deviation index analysis, the influence degree of damming on the river can be reflected, the health condition of each damming area river reach can be evaluated, more accurate research is provided for the health condition of the whole river, and therefore suggestions are provided for river management.

A riverway water quality detection device comprises a water flow generator, a positioning rod, a multi-parameter water quality detector body, a lithium storage battery, a motor reducing mechanism, a detection circuit, a time control circuit, a data transmission circuit and a rectifying circuit, the water flow generator is arranged on the positioning rod side; a motor reducing mechanism is mounted on the positioning rod, a power output shaft of the motor reducing mechanism is provided with a connecting rod, a water quality detector body probe is mounted below the connecting rod, a power switch is mounted on one side of the lower end of the fixing plate, and a linkage plate is mounted at the side end of the power output shaft of the motor reducing mechanism; the multi-parameter water quality detector body, the lithium storage battery, the detection circuit, the time control circuit, the data transmission circuit and the rectifying circuit are arranged in the element box and are electrically connected. According to the invention, the supply of electric energy is ensured on the premise of saving cost. River water quality at more points can be detected as much as possible, remote related personnel can obtain more river water quality data in real time, and powerful data support is provided for more effective river management.

The invention discloses a bridge protection anti-collision device, and belongs to the related technical field of bridges. The bridge protection anti-collision device comprises four rectangular hollow blocks and four spline shaft and spline sleeve assemblies, the four rectangular hollow blocks are distributed in a rectangular shape, the water level height is detected through a non-contact water level sensor, a forward and reverse rotation servo motor works in cooperation with a controller and a comparison module. A protection system composed of a rectangular hollow block, a spline shaft and spline sleeve assembly and a protection mechanism moves up and down on the outer surface of a bridge pier through a walking mechanism according to the water level change, and the situation that ships directly collide with the bridge pier to damage the bridge pier is prevented, and the height difference from the protection system to the bottom of a bridge is monitored by a range sensor; a river management center server and a short message sending terminal device are used for sending information and updating height data to a mobile terminal of a ship in real time, a ship driver plans a route in advance according to the height of the ship driver, and the bridge protection anti-collision device can give an early warning in advance, is convenient to install, prevents the bridges and bridge piers from being damaged by collision and has creativity.

The invention discloses an in-situ modification and repair method of riverbed sediments in black-smelly river courses and solves the problems that at present, the river courses in many cities are muddy and smelly, the river management effect is worse, and the recurrence phenomenon can also exist even if the management for a short period of time is qualified. The sediment surface repaired by the adopting the method disclosed by the invention is of a dense cluster structure and can prevent the situation that heavy metals and other harmful substances contained in a silt layer enter a water body to cause the pollution; an original ecological environment cannot be destroyed; the secondary pollution cannot be caused; the management is thorough, and no recurrence exists basically.

The invention discloses a method for calculating a resistance coefficient of a watercourse containing submerged vegetation, and the method comprises the steps: firstly, building an analytical formula of a Darcy-Welthbach coefficient f corresponding to the watercourse containing submerged vegetation through theoretical analysis; then, for an analytical formula of f, analyzing the relation between each subitem of the formula and a vegetation factor, and determining a dimensionless vegetation factor which affects f; collecting a large amount of test data under different conditions, and establishing a quantitative relationship between f and a vegetation factor through a genetic algorithm; finally, the quantitative relation between n and the vegetation factors is obtained by combining the analytic relation between the Manning coefficient n and the Darcy-Weistbach coefficient f; according to the method for calculating the resistance coefficient of the watercourse containing submerged vegetation, the values of f and n under the conditions of any water depth and vegetation form can be determined, the efficiency and precision of watercourse flood control calculation are improved, and technical support is provided for river management and ecological watercourse construction.

The invention discloses a construction method of an alluvial dike downstream riverbed undercutting depth prediction model. The construction method comprises the following steps: collecting post-flood actual measurement topographic data of each sedimentation section of an alluvial dike downstream river reach every year and hydrological data of a hydrological station; determining a main groove range of each siltation section year by year based on actually measured topographic data, and calculating an average value of riverbed elevations of all actually measured nodes in the main groove range of the siltation section every year and an accumulated riverbed undercutting depth of each siltation section; and carrying out river reach averaging on the accumulated riverbed undercutting depths of all the siltation sections, and constructing a prediction model of the undercutting depth of the downstream riverbed of the alluvial river dam. According to the method, the amplitude of the dam downstream alluvial river depth undercutting is represented by the average accumulative river bed undercutting depth of the constructed river reach, the characteristics of the river bed depth undercutting of the whole river reach can be better reflected, and the change trend of the alluvial river dam downstream depth undercutting can be better predicted by the established statistical model with less data; the method has guiding significance on river management and river regulation planning.

The invention discloses a river and lake ecological health intelligent diagnosis method, which comprises the following steps: constructing a diagnosis index set, and determining the specific type and number of ecological health diagnosis indexes; calculating ecological health diagnosis indexes; carrying out ecological health diagnosis index scoring; determining a weight by using an analytic hierarchy process in combination with a Telffie method; and carrying out ecological health diagnosis by adopting a grading index scoring method, step-by-step weighting and comprehensive scoring. According to the invention, the river and lake ecological health diagnosis model is constructed through an analytic hierarchy process and an index system method, and meanwhile, the river and lake ecological health intelligent diagnosis model is combined with a geographic information system, so that the visualization of data storage, updating, analysis, evaluation results and pathogenic factors is achieved, and the most convenient decision support is provided for river management.

The invention relates to the technical field of river channel management, in particular to a river channel environment management method and device, computer equipment and a storage medium. The methodcomprises the following steps: S10, obtaining river channel management station information which comprises station identifiers and station position information corresponding to each station identifier; S20, generating a station three-dimensional model corresponding to each station identifier, and generating working point information in the station three-dimensional model; S30, generating a station inspection route according to the working point information, and generating station inspection information corresponding to each station identifier according to the station inspection route; S40, acquiring an actual inspection track corresponding to each part of station inspection information through a GPS technology, and comparing the corresponding station inspection route with the actual inspection track; and S50, if the inspection data is acquired, acquiring inspection working point data from the inspection data, and acquiring station identifiers and station position information of the inspection working point data. The method has the effect of improving the river management efficiency.

The invention discloses an ecological restoration effect evaluation method for different types of river reaches of medium and small rivers. The method comprises the following steps: step 1, dividing the types of the river reaches of the medium and small rivers; 2, constructing a medium and small river ecological restoration effect evaluation index system; 3, weight optimization of evaluation indexes of different types of river reaches of medium and small rivers; step 4, determining the evaluation index scoring standard of the ecological restoration effect of the medium and small rivers; 5, judging the ecological restoration effect grade of the medium and small rivers; and 6, determining restoration target thresholds of different types of river reaches of the medium and small rivers. According to the evaluation method provided by the invention, differentiated weighting is carried out on evaluation indexes of different types of river reaches, so that the problems that an existing river ecological restoration effect evaluation method is not prominent in key point and low in accuracy are solved, and a river management department can be effectively guided to carry out river ecological restoration according to local conditions; the method has reference significance for design and operation maintenance of river ecological restoration engineering of the same type.

The invention discloses a river ecological risk evaluation method based on an ecological deficit index, and belongs to the field of ecological hydrology, and the IPC classification number is E02B1 / 00. The evaluation method comprises the steps of obtaining seasonal ecological deficit characters and annual ecological deficit characters according to a hydrological station year-by-year flow hydrograph; and calculating and determining a seasonal ecological deficit threshold value and an annual ecological deficit threshold value for dividing each risk level through trial evaluation, and evaluating seasonal ecological risks and annual ecological risks over the years. According to the method, the limitation of an existing ecological risk evaluation method limited to the monthly time scale is overcome, the assessed time scale is expanded to seasons and years, and method support is provided for river management departments to implement ecological risk management of long-short combination, staging evaluation and graded early warning.

The invention discloses a node-based geographic route finding map identification method, comprising a establishing method and a displaying method. The establishing method comprises: inputting all river vector data Rb corresponding to the identification level Layers (i) and converting the input data Rb into a river vector path Ri; Inputting a set of managers Mi of the identification hierarchy Layers (i), and inputting a corresponding set of river management points Pij for each manager Mij of the set of managers Mi; Finding a corresponding center point Cij for the river management point set Pij;Establishing a management point set Tij of a manager, and establishing a river management data set Ei identifying a hierarchy of Layers (i); Displaying a river management data set Ei generated by themethod according to the establishment method; Generating, color and display the managed reach of the manager. The invention uses the multi-level node tree and the shortest path to generate the riversection, thereby solving the map display problem of the river section management from the generation and expression mode, and facilitating the administrator to better manage the river.

The invention discloses a nano-bubble generating device. The nano-bubble generating device comprises a gas-liquid mixing pump (1) and a cavitation generator (2); the gas-liquid mixing pump (1) is provided with a first inlet (15), a second inlet (16) and an outlet (17); a liquid can flow into the gas-liquid mixing pump (1) through the first inlet (15), a gas can flow into the gas-liquid mixing pump (1) through the second inlet (16), and the outlet (17) is communicated with the cavitation generator (2), thus a gas-liquid mixture flowing out of the gas-liquid mixing pump (1) can be changed into bubbles with nanoscale diameters after flowing through the cavitation generator (2). The nano-bubble generating device disclosed by the invention can achieve a good effect in the aspects of sewage treatment, aquaculture, river management and pollution remediation.