12 results about "Three gorges" patented technology

The invention belongs to the technical field of water resources and atmospheric climate, and discloses a reservoir water surface evaporation capacity calculation method based on a genetic algorithm, which comprises the steps of data collection, variable screening, model construction, model verification and evaporation capacity calculation. According to the method, variable screening and model construction are optimized through a genetic algorithm, the synergistic effect of key factors such as water temperature (Tw) and net radiation (Rn) is mainly captured, and an air temperature-humidity interaction item is introduced to reflect the inhibition effect. According to the independent data set verification of the Three Gorges Reservoir in 2018-2021, the mean absolute error (MAE) of the model is reduced to 0.21 mm / d, the precision is improved by 108% compared with the Penman formula (MAE = 1.297 mm / d), the measurement and calculation deviation of the evaporation capacity of the complex water area is remarkably reduced, and the actual thermodynamic process is better met.

The application relates to a method for predicting the amount of water flowing in front of a dam of the Three Gorges Reservoir based on an improved neural network model, which comprises the following steps: collecting the inflow and outflow data of the Three Gorges Reservoir and the amount of water flowing in front of the dam and dividing the data into training and test sets; setting the particle swarm algorithm, the improved neural network structure and parameters; training the improved neural network by using the training set, optimizing and solving the weight and threshold of the improved neural network by using the improved particle swarm algorithm during the training; calculating the prediction error and judging whether the error is qualified; and using the trained improved neural network for real-time prediction of the amount of water flowing in front of the dam of the Three Gorges Reservoir. After the training process of the error back propagation neural network is optimized and improved by using the particle swarm algorithm, the improved error back propagation neural network is used as the prediction model of the amount of water flowing in front of the dam of the Three Gorges Reservoir, the connection weight of the prediction model is closer to the optimal ideal value, the prediction precision of the amount of water flowing is improved, and the adaptability to the uncertainty of the data information of the reservoir dam is improved.

The invention discloses a three-river parallel flow water frying power generation flood control protection method which comprises the steps of horizontal tunnel arrangement, water diversion pipe step arrangement, ventilation window arrangement, water frying tunnel water pipe V and water tank comparison, tunnel section change, river channel centrifugal sand discharge and linear river channel sand discharge. The method comprises the following steps: arranging a sand blocking semi-water gate, comparing tunnel segmentation conditions, arranging a water inlet sand discharge pump-floating platform, and arranging a water conduit funnel, a screen and a hexagonal filter screen. The hydroelectric generation is stable in benefit; rivers are networked, and the drought and flood adjusting capacity is multiplied and far exceeds that of a water storage power station; three gorges have more time to raise the water level of the reservoir, more electricity is generated, and flood is prevented by lowering the water level; if the three gorges are attacked to break the dam, the destructive power of the flood to the downstream is reduced, namely, the attacked value of the three gorges is reduced, and the risk of being attacked is also reduced; for flood disasters, downstream flood control is helped, red envelopes can be collected, and water is most suitable for being used as the red envelopes in rainy seasons; the three gorges dam break exercise is facilitated, and controllability is achieved.

The invention relates to a vertical shaft type ship lock capable of saving water and a using method thereof. Water retaining doors of the ship lock are two vertical hinged doors, the water pressure bearing capacity is poor, ship locks higher than 25 meters need to be graded, and therefore ship locks in the three gorges of the Yangtze River are divided into five grades. The more the ship lock stages are, the longer the berthing time of the ship in the ship lock is, and the poorer the efficiency of the ship passing through the ship lock is. The vertical shaft type ship lock is a single sliding door and is high in water pressure bearing capacity. Therefore, ship locks higher than 25 meters can be not graded. And the balloon is fixed on the bottom plate of the vertical shaft, and the inflated balloon can replace water to occupy a part of space, so that water can be saved.

The invention provides a reservoir dispatching scene set construction method considering drought and flood sudden change and low water encounter characteristics, which comprises the following steps: collecting two kinds of source data, comparing data in coincident periods, and analyzing consistency; analyzing the group regulation water storage capacity of the three gorges upstream reservoir, and restoring the reservoir inflow of the three gorges reservoir according to the transmission time; in consideration of a river channel undercutting condition, selecting an appropriate data basis constructed by a scene set and appropriate time period data to carry out relation fitting; the drought resisting and water supplementing range of the Three Gorges Reservoir is considered, the Hankou station serves as a control station, and the low water flow encounter characteristics of different areas in different periods are analyzed; collecting three gorges reservoir flow and Hankou station flow data over the years, and calculating and identifying typical events such as drought-to-waterlogging and waterlogging-to-drought; selecting different low water scenes of different time periods of three gorges storage and urban rocks, and constructing scene sets of different scheduling periods in a non-flood season; and constructing a flood season drought and flood sudden change typical scene set by taking the three gorges reservoir flow and the Hankou station as representatives of upstream and downstream.

The invention discloses a three gorges reservoir area sediment dredging opportunity determining method based on asynchronous water and sediment transportation. The method comprises the following steps: firstly, determining initial working time meeting construction conditions based on a water level process and ship operation parameters; furthermore, the core of the method is to quantitatively calculate the time lag of a sand peak reaching a target dredging river reach relative to a water peak in combination with a water-sand asynchronous transportation rule. And the initial work starting time and the lag amount are superposed and corrected to obtain the optimized dredging starting opportunity capable of avoiding the sediment deposition peak, and the required total construction period is calculated according to factors such as the work amount and the equipment efficiency. According to the method, the back-silting peak period is scientifically avoided, the dredging efficiency can be remarkably improved, the effective period of the dredging effect is prolonged, and the engineering cost is reduced.

The invention discloses a method for constructing an ecological function evaluation model of a three gorges reservoir area hydro-fluctuation belt, which is beneficial to protecting the ecological environment of the hydro-fluctuation belt by researching the ecological function of the three gorges reservoir area hydro-fluctuation belt. According to the method, the ecological environment key feature elements and interference factors of different types of hydro-fluctuation belts are screened, different hydro-fluctuation belt ecological system service function types are identified, a Three Gorges reservoir area hydro-fluctuation belt ecological function evaluation system is constructed, and the method has certain scientific value and economic and social and ecological environment practical significance.

1. Name of the design product: doll (Three Gorges Project IP "Dam Dung"). 2. Use of the design product: doll image for publicity, decoration, toys, etc. 3. Design points of the design product: combination of shape and pattern. 4. Picture or photo that best indicates the design points: perspective view.

The invention discloses a reservoir area tributary hydrological similarity clustering and partitioning method. The method comprises the steps that S1, a reservoir area drainage basin is divided into a plurality of sub-drainage basins through an SWAT model, and the sub-drainage basins are further divided into one or more hydrological response units; s2, carrying out slope runoff production calculation by adopting an SCS runoff curve method, and extracting key factors of a hydrological response unit; s3, taking the standardized key factors as attribute features, and performing spatial clustering analysis on all sub-basins of the reservoir area by adopting a fuzzy C-means clustering algorithm to complete sub-basin classification; s4, calculating a confluence feature coefficient of each sub-basin, and extracting composition factors of the confluence feature coefficients; s5, determining a comprehensive feature vector of the branch; and S6, calculating a similarity matrix among the branches, and dividing the branches of which the similarity is not lower than a set threshold value into the same hydrological similar category. According to the method, effective reservoir area branch partitioning can be achieved under the condition of extremely low data density, and a feasible analysis tool can be provided for large reservoir areas with sparse hydrologic stations such as Three Gorges.

This invention provides a method and system for early warning of non-point source pollution release risks in the drawdown zone of the Three Gorges Reservoir area, relating to the field of non-point source pollution monitoring and early warning technology. The method includes: acquiring and preprocessing multi-temporal multispectral image data of the drawdown zone to extract vegetation stress characteristic indices and soil spectral characteristics; constructing a synergistic inversion model of vegetation stress indices and soil organic matter content to obtain the spatial distribution of soil organic matter content; establishing a soil organic matter accumulation-release coupled model by combining water level scheduling plans and topographic data to simulate the release flux and its spatiotemporal distribution under different water storage scenarios; constructing a non-point source pollution release risk index and classifying early warning levels, and outputting the risk warning results. This invention achieves synergistic monitoring of vegetation stress status and soil organic matter content in the drawdown zone, improves the spatiotemporal continuity of monitoring, and provides decision support for early warning and control of non-point source pollution release risks under water storage conditions.

The invention discloses a security check, shipping and dispatching integrated method for ships to be locked and suitable for a Three Gorges-Gou Dam hub, and the method comprises the steps: setting an anchoring ground berth application report line and an anchoring region boundary line of a hydro-junction river reach, classifying anchoring grounds, and dividing the berths of the anchoring grounds; dynamically controlling the capacities of different anchoring grounds according to the reservoir area flow, the number of ships to be locked and hydro meteorological information, and setting the anchoring mode of the ships to be locked; according to the ship type, the cargo type, the ship lockage security check plan sequence and the ship parameters, the ships are accurately berthed, the ships are guided to be berthed in a group formation mode, and after berthing of the ships is finished, in-situ gate-waiting security check is conducted, and the ships are dispatched and arranged; and after the scheduling is finished, the ship waits for the gate number plan and is out-of-ship and locked in order. The method is of great significance to optimization of resource allocation of the anchoring berths on the dam, improvement of the berthing scheduling work efficiency, maintenance of ship gate waiting and navigation order and guarantee of safety.

An inland river shipping mode optimization design and application thereof belong to the technical field of inland river shipping, aiming at inland river shipping of full-voyage different-level channels, an inland river shipping fleet composed of a plurality of small-tonnage independent sailing cargo ships is constructed and operated in an overall planning manner, and each member ship is of a shallow-draft ship type and is provided with a liftable shallow-draft efficient propeller; in the lowest-level channel of the whole course, each member ship is self-propelled, the boats are grouped into an array whole ship in the high-level channel, the array whole ship uses the member ship at the rear part of the array to carry out power propulsion and steering, meanwhile, the personnel allocation demand is reduced, and the energy consumption and manpower of the boats in shipping in the high-level channel are reduced. The scale effect of inland river shipping including fleet purchase and operation is expanded, the problems that a large ship cannot enter a low-grade channel and shipping cost of a small ship in a high-grade channel is high in efficiency are solved, the cargo shipping navigation range of the inland river channel, especially a shallow draft channel, can be expanded, the transportation scale of the upstream of the Three Gorges Dam can be expanded, and the transportation efficiency is improved. And the method is practical, feasible and easy to popularize.