6 results about "Shallow lake" patented technology

The present application relates to the technical field of hydrological remote sensing and water resource information monitoring, and particularly relates to a lake water storage capacity inversion method and device based on a city shallow lake area and a computer device, water surface elevation field construction is performed based on water surface elevation pixel data and remote sensing image data of each time phase, water level change characteristics are extracted according to the constructed water surface elevation field data, lake bottom topography inversion is performed by using multi-time phase water level change characteristics and external lake bottom topography elevation data, the deficiencies of single optical water depth inversion or static topography assumption in the city shallow lake are effectively made up, the physical rationality and spatial continuity of the lake bottom topography inversion are improved, lake water storage capacity calculation is performed, and the accuracy and reliability of the lake water storage capacity calculation are improved.

The present application belongs to the field of river and lake hydrodynamic water environment simulation and water resources regulation, and relates to a water dynamic water quality rapid simulation and emergency regulation method and device integrating artificial intelligence, the method comprising the steps of: constructing a training data set based on historical hydrological sequences; constructing a shallow lake hydrodynamic proxy model based on a physical information neural network; implementing grid scale mass conservation constraints and flow flux correction; performing multi-parameter synchronous rapid prediction of the hydrodynamic field; performing rapid solution of typical water quality element transport and overall model performance evaluation; and implementing differentiated emergency regulation for sudden pollution events during water diversion and non-water diversion periods. The present application takes into account physical reliability and prediction timeliness, realizes a magnitude leap in calculation efficiency, has differentiated emergency regulation capability, can deduce the spatio-temporal evolution characteristics of pollution groups under different working conditions, and provides scientific support and efficient tools for daily management of river and lake water environment and emergency regulation and decision-making for sudden water pollution events.

This invention discloses a comprehensive regulation method and system for water engineering systems to control cyanobacterial blooms in large shallow lakes, belonging to the field of water environment technology evaluation. The method includes: identifying the research object and pre-setting a water diversion scheme; optimizing the inlet combination, inlet flow rate, outlet combination, and outlet flow rate allocation; then, using a three-dimensional mathematical model of wind-driven flow across the entire Taihu Lake area, selecting the optimal hydrodynamic scheme A with the objective of minimizing the spatial distribution of the lake's water exchange cycle, and selecting the optimal water quality scheme B with the objective of maximizing the water quality improvement rate and compliance rate; finally, based on schemes A and B, and combining the overall physical model of wind-driven flow across the entire Taihu Lake area and the three-dimensional mathematical model of Taihu Lake, determining the optimal scheduling scheme for controlling cyanobacterial blooms with the greatest benefit and fastest water exchange, with the objectives of a short average water exchange cycle and low nitrogen and phosphorus load entering the lake. This invention provides key technical support for the precise control of cyanobacterial blooms and the continuous improvement of the water environment in Taihu Lake and similar large shallow lakes.

This invention relates to a method for determining the dredging depth of shallow lake sediments based on resuspended nitrogen and phosphorus release, belonging to the field of water environmental protection technology. The method includes obtaining in-situ columnar sediment and overlying water in the target lake area; simulating dredging of the in-situ columnar sediment at different depths; loading the dredged in-situ columnar sediment into culture columns one by one; adding filtered in-situ overlying water without disturbance; and allowing the columns to settle for a preset time; after settling, mechanically disturbing and resuspending each culture column; taking water samples in batches at the middle depth of the overlying water at preset times after disturbance; analyzing and calculating the release rates of NH3-N, SRP, TN, and TP in different dredging treatment groups; and using the minimum dredging depth where the release rates of NH3-N, SRP, TN, and TP are all less than 0 as the final dredging depth. This provides a basis for determining the depth of environmentally friendly dredging of polluted sediments in shallow lakes and fills the gap in similar projects where dredging depth is difficult to determine and dredging data is insufficient.

This invention discloses a method for ecological restoration of large shallow lakes, including establishing a hydrodynamic model to simulate the lake flow field, including water depth, flow velocity, and flow direction; dividing ecological restoration areas using enclosures, including: analyzing the forces between the water body and the enclosures, calculating the maximum flow velocity that the enclosures can withstand when their resistance to water flow is greater than or equal to the impact force of the water flow; determining the location of the ecological restoration areas based on the maximum flow velocity and the simulation results of the flow field; determining the area and shape of the ecological restoration areas divided by the enclosures based on the vegetation coverage and water system connectivity required for lake water environment restoration; and finally evaluating the rationality of the ecological restoration area division based on the hydrodynamic model. This method facilitates the phased, unit-based, and standardized implementation of ecological restoration of large shallow lakes, ensuring the safety and stability of ecological zoning engineering measures, and improving the feasibility of implementing ecological restoration of large shallow lakes.

The application discloses a kind of shallow lake ecological water level optimization control method and system coupled with water power-water quality-vegetation model and multi-objective algorithm, method includes: the bidirectional coupling simulation model of shallow lake is constructed, the bidirectional coupling simulation model includes water power module, water quality module and submerged vegetation module.Construct multi-objective optimization function, including with the staging water level of aquatic vegetation in different growth stages as decision variable;Improved multi-objective genetic algorithm is used to solve the multi-objective optimization function, obtain pareto optimal front solution set;Optimal solution is screened from the pareto optimal front solution set using approximation ranking algorithm and water level control is carried out.Thus, the water power, water quality, submerged vegetation module of shallow lake considering the dynamic demand of submerged plant in different growth stages is constructed, the problems of multi-objective conflict, vegetation growth stage response missing, low calculation efficiency and unscientific optimal strategy screening in the prior art are solved.