298 results about "Shoal" patented technology

The invention relates to a biological water quality monitoring system by fish behaviors and a monitoring method thereof. The monitoring system provided by the invention comprises a data acquisition device, a data analysis device and a transparent water tank, and is characterized in that the water tank is successively divided into a pipelining buffer area, a fish shoal observation area and a filtration adjusting area by netted fish baffle plates; the sidewall of the pipelining buffer area is provided with a water inlet pipe; the outer portion of the fish shoal observation area is equipped witha light source; the sidewall of the filtration adjusting area is provided with a water outlet pipe; the filtration adjusting area is provided with a circulating pump; and the sidewall near the bottomof the water tank is equipped with a draining valve. The monitoring method provided by the invention comprises the following steps of: shooting the behaviors of the tested fish shoal by the use of a camera to obtain an image sequence, sending into a computer for real time image processing and data analysis, comparing obtained average moving speed, dispersion and the like and a preset threshold value, and determining whether the water quality is polluted or not. According to the invention, parametric records of fish behaviors in hydrostatic, pipelining and water-exchanging tests can be simultaneously realized, and the behaviors of individual and colonial organism can be simultaneously measured.

The invention relates to a method for constructing a deep pool and a shoal in a straight river channel. In the method, a spur dike is arranged on the left bank side of the straight river channel, a bank slope on the opposite bank of the spur dike is protected by riprap, a diving guide wall is arranged on the left and right banks of the downstream side of the spur dike respectively, the discharge cross section of the river channel is shortened by the spur dike to increase the flow rate of water flow, the bottom of a river bed of a river reach between the diving guide walls on the downstream side of the spur dike is continuously scoured to naturally form the deep pool, and a dead water area or slow flow water area formed between the diving guide wall and the river bank becomes the shoal through long-term deposition. The method has the advantages that: the deep pool is naturally formed and becomes a rest place for aquatic organisms such as fishes and the like, and can become a shelter for the aquatic organisms such as the fishes and the like in a flood period; plants can be planted on the shoal, and the shoal can become an organism habitat different from the deep pool; and the complexity of a river channel structure and water conservation condition diversity can be increased or repaired, and river biodiversity, population composition and rare species conservation are facilitated.

The invention discloses a construction method of a flat shoal flow prediction model based on joint control of upstream-downstream borders over a lower reach. The construction method specifically comprises the steps of adopting a one-dimensional hydrodynamic model to calculate and study a water level-flow relation curve of each fixed section in the reach; determining flat shoal flow in each section according to flat shoal elevation in each fixed section; adopting a method based on the combination of geometric average of logarithmic transformation and weighted average of section spacing to calculate the flat shoal flow of reach dimension; analyzing a response relationship of the flat shoal flow adjustment on an upstream water-sediment condition and downstream water level change, and constructing the prediction model based on joint control of the upstream-downstream borders over the lower reach. According to the construction method of the flat shoal flow prediction model based on joint control of the upstream-downstream borders over the lower reach, the calculated and obtained flat shoal flow of reach dimension is capable of better describing the flow passing capacity of the whole reach, and thus the flat shoal flow is more representative; the constructed flat shoal flow prediction model is capable of well reflecting the variation trend of the flat shoal flow along with the upstream water-sediment condition when the downstream water level changes sharply, and thus the constructed flat shoal flow prediction model has a guidance significance in the flood prevention and riverway management.

The invention relates to a construction method for building a large-scale offshore wind farm with depth more than 2m, which mainly comprises the following steps: dragging a construction ship to the set position by a shoal water tug boat, starting a lifting device on the construction ship after the construction ship is positioned to lift the ship body from the water level by 2-3 m; dragging a vehicle pontoon provided with devices such as a steel pipe pile, a blower operating platform, a tower cylinder, a blower bin, a hub, blades and the like near the construction ship through the shoal water tug boat and then anchoring and positioning; and then constructing by utilizing devices such as a 400-t fully-revolving crane and the like on the construction ship. The invention leads the construction ship to perform the construction on the large-scale offshore wind farm with depth equal to or more than 2m because operation, loading and dragging are separated, has the advantages of continuous operation without being influenced by tide, convenient construction, high speed, high efficiency, low construction cost, and the like, and fills up the blank of constructing and building the large-scale offshore wind farm at the zone of 2-5 m in the world.

The invention relates to a warning system for safety monitoring of a tailings storehouse. The warning system comprises a system integration which synthesizes GPS dam body deformation monitoring data acquired, dam body phreatic line monitoring data, dry shoal namely deposition shoal monitoring data, and storehouse region water level and rainfall amount monitoring data to perform analysis, judgment and early warning through an intelligent expert software system, and can perform real-time monitoring in a video mode. The system adopts a structural configuration of three levels of structural frames: a bottom layer structural frame as an original data acquisition layer, a middle layer structural frame as a data processing layer, and a top layer structure frame as a user layer, which adopt an expert software subsystem to give corresponding calculation results to the data in a database according to different requirements of users. The warning system adopts optical fiber cables and wireless transmission communication equipment as carriers to form a network system specially for safety monitoring and warning for the tailings storehouse, and adopts the modern science and technology to perform the safety monitoring and warning work for the tailings storehouse, thereby sufficiently satisfying the requirements on safety management of tailing production by mining enterprises and meeting the actual demands for the safe production by the mining enterprises.

A surface gravity wave generator and wave pool is disclosed. A wave pool is formed of opposing side walls and a center channel of water. The channel includes a bottom contour with a depth that runs from a deep end to a shoal or beach. One or more three-dimensional foils are vertically arranged along at least one side wall, and moved against the water in the channel. Each foil has a curvilinear cross-sectional geometry that defines a leading surface that is adapted to generate a wave in water moving past the leading surface, and a trailing surface configured for flow recovery to avoid separation of the flow of water in the wave and to mitigate drag from the foil from the water moving past the leading surface.

The invention relates to a detector for measuring the swimming path of fishes, and belongs to the field of daily tools. The detector comprises an elastic bar-shaped substrate of a high-molecular material, a sonar detector, a remote control boat, a position indicator, a remote computer system, a personal embedded system and a transmission system, wherein the sonar detector, the position indicator and the transmission system are mounted on the remote control boat, and data of the sonar detector and the position indicator is transmitted to the remote computer system or the personal embedded system via the transmission system for data analysis and processing. The detector can accurately detect the position of a fish shoal, track the fish shoal, and determine the direction of the fish shoal in advance, so that directed baiting and catching can be carried out at points that the fish shoal will pass in advance; and the detector is free of blind points, not limited by regions, and highly accurate, stable and reliable.

The invention discloses a seine object fish shoal tracking method based on horizontal fishgraph images. Through obtaining echo signals of a fishgraph, a seine object fish shoal is tracked, a movement locus is predetermined, and thus the success rate of seine fishing is improved. According to the invention, through adjusting the inclination angle of a sonar, changing the emission direction of sound waves and performing 360-degree rotation, underwater three-dimensional space can be scanned, three-dimensional images are drafted, the quantity of fish shoals is estimated in a stereo mode, and effective help is provided for development of fish resources.

The invention relates to a winding form construction method for small-and-medium-sized linear riverways and aims to effectively solve the problem of winding form construction of the linear riverways. The method includes: throwing gravels to form gravel piles on one side of a main river channel from the bottom layer to the upper layer, wherein the distance between nearshore points and far off-shore points of the gravel piles is 1 / 5 of the width of the main river channel; arranging gabions on water sides and lateral sides of the gravel piles to fix the gravel piles; expanding a riverway opposite to the gravel piles to a width 1 / 5 of that of the main river channel; downwardly excavating one side, with the riverway modified, of a riverbed to form a deep pool, and piling up excavated earthworks to air faces of the gravel piles to form a shoal; positioning the two gravel piles on two sides of the riverway respectively to form a gravel pile group, enabling the air faces of the gravel piles to form a shoal structure, enabling the modified opposite bank to form a deep pool structure, and planting submerged plants in the deep pool; arranging three to five groups of gravel piles in the linear riverway to form an ecological gravel group to increase local winding degree of the riverway, so that winding form construction of the riverway is realized. The winding form construction method for the small-and-medium-sized linear riverways has the advantages that unification of purification and landscape functions is realized, and enormous economic and social benefits are achieved.

The invention discloses a shoal hybrid driven aquatic plant harvesting ship which comprises a ship body, a driving system, a colleting device, a storing device, a conveying device, a driving cabin and a paddle-wheel driven travelling device, wherein the driving system is arranged in the ship body; the colleting device is mounted at the front end of the ship body; the storing device is arranged inthe middle of the ship body; the conveying device is mounted at the rear end of the ship body; the driving cabin is arranged above the ship body; the paddle-wheel driven travelling device is arrangedat the bottom of the ship body; a control device is arranged in the driving cabin; an accessory-wheel driven travelling device is also arranged at the bottom of the ship body; the accessory-wheel driven travelling device comprises a driving shaft, a driven shaft, a driving gear, a driven gear, a hydraulic motor and a compound crawler belt; the driving shaft and the driven shaft are arranged at the bottom of the ship body; the driving gear is mounted on the driving shaft; the driven gear is mounted on the driven shaft; the hydraulic motor is connected to the driving shaft; the compound crawlerbelt is arranged between the driving gear and the driven gear; and a plurality of guiding wheels are arranged inside the compound crawler belt, thereby enabling the harvesting ship to be capable of operating in a profundal zone, a shoal zone and a wetland.

The invention relates to the technical field of bridge construction, and discloses a system for lifting and sliding a large-tonnage steel box girder in a land area and a shoal area and a construction method thereof. The method comprises the following steps of: 1, arranging a lifting system beside a pier adjacent to a waterway, and arranging a sliding system below the lifting system and on a land side; 2, conveying a steel box girder section to a lifting position from the waterway, and lifting the steel box girder section by using a lifting device; 3, drawing a lifting transverse beam by using a jack and a steel stranded wire which are arranged on a lifting longitudinal beam to ensure that the lifting transverse beam, together with the lifting device and the steel box girder section, slides to a position above a sliding platform along the lifting longitudinal beam; 4, descending the steel box girder section to the sliding platform by using the lifting device; and 5, sliding the steel box girder section to a design position along a sliding track by using drawing equipment and arranging in position. The problem that a large floating crane is limited by the water level of a river channel and influenced by tide is solved, the construction period of a single steel box girder section is shortened, and work efficiency is improved; meanwhile, the steel box girder section can be arranged in the shoal area and the land area.

The invention discloses a fish pass facility and method with a fish ladder and a navigation lock combined, and relates to a facility and method for migratory fishes to move upstream through a barrage building. The fish pass facility comprises a fish luring ladder with the inlet end arranged in the downstream river channel of a dam, wherein the fish luring ladder is a slope type channel which is internally provided with a low weir, the slope type channel inclines in the upstream direction and extends in the direction of the lock chamber of the navigation lock as a whole, the outlet end of the fish luring ladder is connected with a fish collecting pond which is connected with a transfer pond through a connecting channel, branch water diversion pipes are arranged in the transfer pond, the transfer pond is partitioned by a transverse partition wall into a main transfer pond and an auxiliary transfer pond, a lower gate is arranged in the transverse partition wall, a water flowing channel is formed in the side wall of the lock chamber of the navigation lock and is communicated with the transfer pond and the lock chamber of the navigation lock, and an upper gate is installed on the water flowing channel. According to the fish pass facility and method with the fish ladder and the navigation lock combined, the fish ladder and the navigation lock are combined, the upper end of the fish ladder is arranged in the lock chamber of the navigation lock, the influences caused by the upstream and downstream water head are overcome through the navigation lock, and therefore migratory fish shoals can pass through the dam; the length of the project of the fish ladder can be obviously reduced, and therefore input cost is reduced.

The invention discloses an acoustic multi-beam-based remote real-time monitor of fish shoals in a deep water net cage, relating to a monitoring device. The invention provides the acoustic multi-beam-based remote real-time monitor of the fish shoals in the deep water net cage which has flexible marine operation, easy placement and strong anti-wave capability. The acoustic multi-beam-based remote real-time monitor is provided with a detection signal transmitting and echo collection device, a data analysis and image display device and a data wireless transmission device. The detection signal transmitting and echo collection device is provided with an annular transducer array and a control box, and the annular transducer array is provided with single beam transducer array elements; the control box is provided with a power supply, a controller, a detection signal generator, a power amplifier, a signal collection and preservation circuit and a signal pre-treatment circuit. The data analysis and image display device is used for realizing the remote detection and the control operations on a bank station, carrying out the analysis of the received monitoring data of the fish shoals in the net cage and carrying out the image display of the result. The data wireless transmission device is connected with the detection signal transmitting and echo collection device and the data analysis and image display device.

The invention discloses an intelligent feeding system based on deep learning. The system mainly comprises a mechanical feeding part, a breeding tank datum collection part, a deep learning server and afeeding control part; and the breeding tank datum collection part collects water body temperature, environment temperature, and pollution collection data of a breeding tank and fish shoal behavior data and transmits the collected data into the deep learning server, the deep learning server performs analysis integration and training learning, determines whether to feed or not at present, a feedingamount and feeding duration, and sends a corresponding instruction to the feeding control part, and the feeding control part controls action of a relevant mechanical feeding part according to the instruction. The system disclosed by the invention has strong pertinence, can continuously perform self learning and self improvement, and can make a judgment result more accurate and more reasonable; and a final realization function of the system is equivalent to cultivation of a worker with rich feeding experience, and the system has judgement ability of people, is more stable than artificial workand has lower input costs.

The invention relates to a method for forming an ecologically-sewage-purifying compound riverbed wetland system, which is characterized in that: a 30-60mm round gravel, a 12mm medium gravel, a 6mm gravels as well as coarse sands and soil matrixes are filled in the new riverbed from the lower part to the upper part to form a compound riverbed and the top of a shoal of the compound riverbed is positioned below the low water level of the river; the aquatic plants are planted on a soil layer of the shoal of the compound riverbed; the deep grooves and the slopes are protected and built by ecological concrete; thus, the ecological ecologically-sewage-purifying compound riverbed wetland system is formed. The invention has the advantages that a comprehensive treatment system with the plant-the matrix-microorganism is formed, thus enhancing self-purification capability of the river, purifying water body of the river and improving water environmental quality of the river; section form of the riverbed is transformed into a compound riverbed structure in which the shoal and the deep grooves exist simultaneously and the riverbed wetland system is arranged in sinuous way in longitudinal river, which facilitates perch and growth of the aquatic creature and diversification of the river creature; a water distributor is laid to carry out the depth treatment for tail water reaching the standard; the invention has the advantages of simple structure and construction, convenient operation, stable function and low manufacture cost.

The invention relates to high-speed and long-distance fish shoal detection robot and a detection method. The detection robot comprises an external remote controller and a body, wherein the body consists of a casing, a power system, a snorkeling system, a detection sensor and a control communication system. The detection robot is powered by a gasoline engine on the water surface to sail to a fish shoal detection point at high speed, and then is powered by a storage battery to detect the density, the varieties and the quantity of the fish shoal after diving underwater by using a fish shoal detection sonar and a camera and transmit the detection result to an operator after upwards floating. The invention can accurately reach a plurality of designated positions for detecting waters at high speed and has the advantages of long sailing distance, less influence by the weather, capability of reducing the detection cost and improvement of real-time property and safety.

A sonar emits an ultrasonic wave into the water from a transducer on the basis of a transmission signal outputted from a transmission circuit, receives an echo reflected in the water with the transducer and converts the echo into an electric signal, and displays underwater information on a display unit on the basis of an echo signal extracted by processing the electric signal. A tailing signal removing unit for removing a tailing signal and extracting only the echo signal is provided in the sonar such that a video of a surface layer fish shoal is clearly displayed on a screen of the display unit without being hidden by a video of the tailing signal.

The invention relates to a breeding method for grafting and cultivating other types and breeds of hibiscus economic and ornamental plants by taking an extremely salt-resistant hibiscus hamabo as a wildstock to improve the salt resistance of scion. The pot experiment proves that the growth vigor of hibiscus which is grafted and propagated by taking the hibiscus hamabo as the wildstock is exuberant,the grafting survival ratio is high (above 90 percent), the hibiscus is resistant to the soil salt above 8 thousandth, but the hibiscus propagating by cuttings is moderately damaged by 4 thousandth soil salt. The hibiscus plant after being improved can be popularized to be cultivated and applied on the wide coastal shoal, thereby improving the utilization and yield of the land resources on the coastal shoal; at the same time, the breeding method has the great significance on enriching the ecological landscape of the coastal shoal and improving the ecological environment of the coastal shoal.

The invention discloses a fishing-oriented unmanned ship group collaborative self-organizing work system and an implementation method of the system. The method comprises the steps that an unmanned ship group collaborative self-organizing fishing work mechanism is established through the unmanned ship group collaborative self-organizing work system; unmanned ships are accurately positioned by using the master unmanned ship and slave unmanned ship collaborative navigation positioning technology; and a collaborative search strategy and a collaborative path tracking strategy are formulated according to the work area and the work environment, and fish finding, fish shoal tracking, net trawling and net drawing work can be completed according to the strategies. The system and the method are based on the radio communication system of the radio station and based on the multi-sensor integration measurement and control system of the CAN bus, all the unmanned ships collect environment and position information through a sensor integration system and then exchange data through the communication system and perform collaborative control.

A method for raising the monomeric oyster in the shoal and shallow sea of northern sea region includes such steps as artificially culturing the larvae of oyster, sticking the larva onto shell, and throwing the shells into the seawater with 0.2-2.5m depth on the ebb.

An overall wave suppression method on lake beaches characterizes that on the front wave beaten zone protective screens are set to reduce over 70% wave energy, at the same time wave asorption zones are set along the rigid lake bank to elimiante reflection waves to stabilize the near water to promote silt up of mud and sand and formation of shoals, reset up and forms natural ecological screens, the wave suppression devices are removed including a wood fence wave suppressing zone, a net flexible wave suppressing zone, an artificial wave suppressing zone before bank.

The invention relates to the technical field of river bank vegetation recovery, in particular to a method for planting plant at a terrestrial-aquatic transverse zone of a river bank. The method for planting the plant at the terrestrial-aquatic transverse zone of the river bank includes that selecting shrub, arbor and herbaceous plant from March to April at each year; flatting a planting land in a gravel bank land of the terrestrial-aquatic transverse zone of the river bank, wherein the distance between the gravel bank land and the normal water level of the river bank at the dry season is 20 to 200 meters, and the planting region comprises a banded herbaceous plant planting sub-region, a shrub planting sub-region and an arbor planting sub-region parallel to the flow direction of the river water and arrayed in sequence from the river center to the banks; setting planting cavities which are arrayed in Chinese character Pin-shaped in the planting region; obliquely planting the shrub, arbor and herbaceous plant in the planting cavities, wherein the oblique direction is the same with the water flow direction; refilling the excavated sand soil, using a large gravel to cover the surface layer, using gravels to retain at the four sides, using an iron wire net to cover the gravel surfaces and fixing on the river shoal, and watering the plant; watering till the shrub and arbor shoot buds, and reducing the watering times after shooting buds.

The present invention relates to an automatic bait casting method based on sound wave location and image collection, belonging to the detection method technology field. The method comprises the following steps: after performing bait casting into a net cage, allowing baits to be gradually submerged in water, and allowing shoal of fish to start feeding in the submerging process; employing a Doppler particle sensor, performing location of residual feeds; employing the Doppler particle sensor, performing image collection of the residual feeds located by the Doppler particle sensor; employing the images collected by the Doppler particle sensor for analysis to distinguish bait particles and other substances; determining whether the residual feed amount submerged at the bottom of the net cage reaches a substantial level or not; allowing the Doppler particle sensor to perform real-time detection of the position and the density of the shoal of fish; and when the residual feed amount is lower than a setting substantial level and the shoal of fish is located at a residual feed area and is large in density, allowing a controller to control a bait caster to cast the baits; and when the residual feed amount is higher than the setting substantial level and the shoal of fish is not located at the residual feed area, or the shoal of fish is low in density, stopping putting of the baits.

The invention discloses an unmanned surface vehicle and robotic fish shoal master-slave collaboration system comprising an upper computer, a host and slaves. The upper computer communicates with the slaves through the host by a wireless communication network. The upper computer is arranged in a control center. The host is arranged on an unmanned surface vehicle. The slaves are arranged on each robotic fish of the robotic fish shoal. The unmanned surface vehicle acts as a signal transmission intermediate station to transmit the detection signals of the underwater detectors, i.e. the robotic fishes, to the upper computer through the unmanned surface vehicle so that the power of signal transmission can be enhanced, the distance of signal transmission can be increased, the robotic fish shoal is quite close to the unmanned surface vehicle, real-time communication between the underwater robotic fishes and the unmanned surface vehicle can be realized, and thus the signal stability and the operation and movement radius of the whole robotic fish shoal can be enhanced. The work mode of collaboration of multiple robotic fishes is adopted so that the detection area of the detectors can be extended and the overall work efficiency can be enhanced.

The invention discloses a sonar fish shoal detection system and method. The sonar fish shoal detection system comprises a central server and multiple detection floaters which are arranged on the water surface. Each detection floater comprises a shell, a processor, sonar sensing equipment, water temperature detection equipment and positioning equipment. The sonar sensing equipment detects fish shoal depth information of a water area in which the detection floaters are arranged. The water temperature detection equipment detects water surface temperature of the water area in which the detection floaters are arranged. The positioning equipment positions the positioning information of the floaters. The processor transmits the fish shoal depth information, the water surface temperature and the positioning information to the central server. The central server receives the fish shoal depth information, the water surface temperature and the positioning information transmitted by all the detection floaters and draws a fish shoal comprehensive information graph by using the fish shoal depth information, the water surface temperature and the positioning information of each detection floater so as to analyze the distribution position and depth of the fish shoal. The sonar fish shoal detection system has large scanning range so that the data requirements of wide-range fish shoal detection and fishery resource estimation can be met, data sharing of multiple ships can be realized and judgment and prediction of the movement direction of the fish shoal and tracking are facilitated.

An underwater robot can dive in the seabed and can scurry to the water surface in a high speed for receiving and transmitting information. The underwater robot can move fast in water, can perform dredging in a shoal and can reach the deep-sea bottom to sample core samples and valuable organisms, perform undersea transportation and the like, turning of the underwater robot is very flexible, and the main body of the underwater robot is a powerful pump like an abdominal cavity which can eat from the front portion and can perform discharging from the rear portion; a digging wheel is arranged in front of the pump, and a scribbing blade is like an arm and can perform padding and turning; rear driving wheels are like double feet and can walk; a driving cab and a self-control system are arranged above the pump, and operation can be performed according to information provided by an underwater monitor and an information transmitting and receiving device; and a lithium battery (or a fuel battery), a hydraulic oil tank, an oxygen tank and a hydraulic power system are arranged on two sides and the rear surface of the pump and serve as the heart and vessels of the robot, and a support plate is arranged on the lower portion and serves as the back of a human body. When the water is not deep, the robot can operate according to the information of a ship monitor provided by an underwater display in dredging, the cab can be descended, and debris flow can be stricken to a mud boat or ejected on the shore without any piling or pile pulling. Therefore, the underwater robot can dive to the seabed and can perform dredging.

A micro-analysis method for a transformer device based on a BP nerve network and a manual shoal comprises the following steps: obtaining the data such as furfural, brackish water, disruptive voltage and acid value; optimizing the weight and the threshold of the BP nerve network by utilizing a manual shoal optimizing AFSO algorithm, so as to define the weight and the threshold; extracting the state micro-analysis result of a breakdown case base of the transformer device to train the BP nerve network; and inputting the newly obtained furfural, brackish water, disruptive voltage, acid value, hydrogen content, acetylene content, methane content, ethylene content, commissioning time, breakdown frequency in the recent three years, and breakdown grade in the recent three years into the BP nerve network for micro-analysis of the state of the transformer device, so as to define the state of the transformer device. The method has the advantages of scientificity, efficiency and accuracy.

An underwater electric swim-assisting shoe comprises a plastic shoe outsole, a metal show sole from, a sole metal plate, a propulsion motor, a waterproof storage battery, a motor frame net cover and a battery protecting cover. A plurality of sole frame bolts and nuts are fixed on the metal shoe sole frame, the plastic shoe outsole after being positioned by injection and an electric swim-assisting vamp are assembled to form a shoe boot, the sole metal plate is fixed on the metal shoe sole frame by using the nuts, and the propulsion motor and the waterproof storage battery are fixed on the sole metal plate; after the motor frame net cover and the battery protecting cover are fixed on the metal shoe sole frame, underwater sundries can be prevented from tripping and winding propulsion propellers, and the underwater electric swim-assisting shoe can be worn to walk on shoals; when the underwater electric swim-assisting shoe is worn to move underwater, two feet are vigorously merged to push a sole triggering switch to act or press an electric shoe waterproof manual switch, in this way, the propulsion propellers on the propulsion motor can be controlled to rotate to push a human body to advance underwater. The underwater electric swim-assisting shoe is especially suitable for underwater sports, underwater exploration and navy special forces to use.

The invention relates to a developing and governing method for a sandy wide channel canal / shoal / pool. A narrow river channel is formed by two main dikes (new flood dikes) which are constructed between the prior flood dikes at two sides of a sandy channel segment along the riverway trend, and large dams are constructed at the upstream and the downstream. A water supply and sand diversion canal is constructed at the inside or outside of at least one of the main dikes in the narrow river channel. A conveyance and navigation canal is constructed outside one or two sides of the narrow river channel. The conveyance and navigation canal is adjacent to the water supply and sand diversion canal or the conveyance and navigation canal, or the conveyance and navigation canal is a split type. The bottomland and the pool surrounded by the diking are changed from the shoal area between the main dike or canal dike and the prior flood dikes. The bottomland can be a permanent site for living, production, construction and development. The long-term reserved pool is capable of storing water resource and supplying water in non-flood season, storing floodwater and replenishing dryness in flood season, and detaining and storing the flood. The developing and governing method for the sandy wide channel canal / shoal / pool effectively prevents from flood, treats and uses slit, ensures the security in flood prevention, and supplies enough rinsing water source; the water service cost is low, and the method is capable of developing and utilizing the resources such as hydraulic power, shipping, and tourism, etc. in the channel segment, and the method has a positive meaning in improving environment.