182 results about "River outflow" patented technology

Watershed hydrology analysis and management process and system with a network of weather stations and artificial drainage systems with artificial and natural reservoir management through locks and pumping stations. It evaluates potential hydrologic risk in each area and analyses the possible consequences of future precipitations using simulations. To make the simulation, it calculates hydrographs for each sub-basin, streams and rivers in the basin. It simulates the behavior of the basin under different scenarios corresponding to different types of management of the operation of locks and/or pumps and compares its results in terms of loss of flooded area, economic loss in each area, loss for flooding of urban areas, etc. Optimization of the simulation through artificial intelligence (AI, meta-heuristic algorithms, neural networks, etc.) allows it to act as a search engine to find better solutions and the best configuration of resource management that allows minimizing the socio-economic impact on each basin.

The invention relates to a method for cooperatively and optimally allocating the water volume in a non-flood season, which comprises the following steps of: firstly, obtaining the information of water consumption and water return of each aspect under the overall consideration including the aspects of ecology, livelihood, industry, agriculture, and the like of a river basin; secondly, determining and controlling the minimum water demand of a section by calculating the runoff of a river course, the water demand outside the river course and the lowest water demand in the river course; monitoring the water volume of the river course of the river basin at real time, and automatically outputting water shortage prewarning degrees when the flowrate of the control section is lower than the minimum water demand flowrate; and finally, dynamically and integrally adjusting and controlling groups of reservoirs through cooperative particle swarm intelligent optimization algorithms under different prewarning degrees, so as to achieve the functions of unified water allocation. The method thoroughly takes the water consumption of the ecology, the livelihood, the industry and the agriculture into consideration, and ensures the balanced water consumption of water-consuming aspects in the river basin according to the principle of firstly ensuring the livelihood and then meeting the requirements of the agriculture and the industry.

The invention belongs to ecological condition project and hydraulic engineering technology field. It is based on indigene species, keeps the principle of 'from nature, excelled nature' to carry on ecology design, the designed groove, canal, river, bank, constructed swamped land, waste water processing system, and has merits of waste water process, greening and bank protection, beatifying landscape and continuous resources. Through constructing nature simulating ecological system, it can display the waste eliminating function of constructed swamped land system fully, but also it can upgrades material producing ability, and the cost is low, easy to be operated, the area is small.

The invention relates to a density forecast method of the chlorophyll a stemmed from a water body of the BP neural network. The density forecast method comprises the following steps: (1) the chlorophyll a in the tested water body and the value of other correlative water quality index which influences the chlorophyll a are acquired as the examination data. (2) The neural network of an error back propagation is established. (3) The neural network is trained and tested. (4) The neural network which passes the test is utilized to forecast the chlorophyll a in the water body. Other water qualities which influence the chlorophyll a are: Ammonia nitrogen, total nitrogen, total phosphorus, orthophosphate, permanganate index, temperature, dissolved oxygen, pH, suspension, five-day biochemical oxygen demand. The step (1) also comprises a normalization process. The data of the chlorophyll a and other ten water quality indexes are between -1 and +1 after the data of the chlorophyll a and other ten water quality indexes are normalized. The neural network comprises an input layer, an intermediate layer and an output layer. The invention can establish a forecast model related to the chlorophyll a, just needing the experiment which has the limited times. The chlorophyll in the river can be accurately and quickly forecasted through the computer simulation experiment and the science forecast.

The invention relates to a reservoir capacity monitoring method, comprising the following steps: carrying out ortho rectification to a remote sensing image above the water body to be monitored, and then extracting the water body boundary through the remote sensing image so as to obtain a water body boundary polygon; overlapping the water body boundary polygon on the topographic DEM and extracting the intersection points between the water body boundary polygon and the topographic DEM as three-dimensional water boundary discrete points; interpolating the three-dimensional water boundary discrete points to obtain the water surface DEM; and evaluating the cubage contained between the water surface DEM and the topographic DEM terrain, so that the reservoir capacity monitoring result of the water body to be monitored is obtained. The invention makes use of the remote sensing and GIS and other spatial information technologies to accurately monitor the water surface as a curved surface, as well as the total reservoir capacity including the dynamic reservoir capacity. The invention also provides an optimization mode based on river segmentation and creates a buffer zone to enable the calculation to be controlled in an effective region, so the invention is provided with high precision and efficiency and has an operational popularization and application prospect.

The invention discloses a safety assessment system for a river water environment of a plain river network, and belongs to the field of water environment safety assessment. By taking a DPSIR model as a theoretical basis, water environment safety assessment indexes are divided into five aspects of social and economic driving force, a pollution source and water resource development pressure, a water environment health present condition, a river service function and an environment supervision capability, and twenty assessment indexes including permanent population density, GDP per capita, a building land use proportion and the like are established. The water environment safety assessment process comprises the specific steps of obtaining a survey value for assessing an index of each layer of a river; determining an assessment standard value of the index; performing standardization processing of the survey value of the index; calculating an index score of a river water environment safety assessment index layer; calculating an index score of a river water environment safety assessment criterion layer; and calculating and assessing a river water environment safety index. According to the system, a scientific assessment method is established for the plain river network, and the water environment safety condition and problem of the plain river network can be quickly and effectively identified.

The invention discloses a river ecological flow maintenance-orientated reservoir optimizing and dispatching method, which comprises the following steps of: diving influx flow of a reservoir into four intervals according to the magnitude of the flow, diving the storage capacity of the reservoir into four intervals by using an upper dispatching curve, a lower dispatching curve and a dead storage curve, and formulating different water supply and letdown rules when the influx is in different flow intervals and the water level is positioned in different storage capacity intervals. When the flow is positioned in the interval containing flat shoal flow, the influx flow is totally used for meeting river ecological flow after meeting the water supply requirement; when the influx is positioned in the minimum flow interval, the reservoir reduces letdown to maintain river low-water ecological pulse; and when the water level is positioned in the interval above the upper dispatching curve, the reservoir enlarges the letdown to ensure the flood control function. The method also comprises the following steps of: quantizing a target value of dispatching by adopting a variable range method to meet the constrained planned water supply reliability, and simultaneously optimizing parameters in the dispatching rule by using a genetic algorithm to acquire optimal dispatching parameters under the condition of meeting the planned reliability.

The invention discloses a method for constructing water eutrophication risk analysis model, referring to a prediction/pre-warning method of water quality eutrophication risks. In terms of information technique, this invention includes: firstly creating Bayes network topology structure of water eutrophication risk analysis model via computer programmes in accordance with storage structure and stored content of respective monitoring data in water environment information system; analyzing various influencing factors and correlation causing the water eutrophication risks in adoption of parameter learning; lastly, generating a model via test and modification. Accordingly, the method of this invention takes various influencing factors and correlations thereof into consideration, thereby better analyzing degree of water eutrophication risk, realizing prediction/pre-warning of water eutrophication, and providing foundation of scientific decision to water environment management and water pollution control. As a result, this invention can be widely applied to water eutrophication risk analysis as well as prediction/pre-warning of rivers and lakes, in particular to water eutrophication risk tendency analysis and prediction of the Three Gorges Reservoir area.

The present invention discloses the construction process of pipeline through river and belongs to the field of underwater pipeline laying technology. The construction process features the underwater excavating with long-arm single-bucket excavator in prefabricated floating camel, the drawing of floated pipe with sealed ends with construction machine to place, the refilling water to the pipe for depositing to pipe canal, and final pipe pressing, stabilizing and refilling. The construction process includes the steps of preparation, measurement and setting out, underwater excavating, floating pipe and depositing pipe, stabilizing pipe and refilling. Compared with available technology, the present invention has the advantages of short construction period, low cost, no influence on navigation, construction safety and no environmental pollution.

The invention relates to a method for monitoring river runoff through a remote-sensing hydrologic station. The method comprises the steps of 1, selecting key fluvial sections lacking measuring stationareas; 2, conducting low-altitude remote sensing retrieval on the information of the fluvial sections lacking the measuring station areas; conducting real-time drone control flight on monitoring points of the fluvial sections selected in step 1, preprocessing the obtained data, extracting earth surface information, obtaining the longitudinal section gradient, the cross section area and the watersurface width of the fluvial sections on this basis, combining ground water level monitoring and underwater topographic surveying and mapping, and utilizing a manning formula for deduction to solve the flow of the monitored section. The method has the advantages that satellite remote sensing and low-altitude remote sensing are coupled, each other's advantages are complemented, and the blank of thelack of hydrologic data is filled up; during emergency management, the real-time river channel segment width is obtained, the river runoff is calculated, the river runoff data is reported in real time, and the runoff monitoring precision is smaller than 8%; the problem that hydrometric stations of an arid region are scarce, and cannot handle flood, water pollution and other emergency events is solved.

The invention relates to the technical field of cartography and geography information systems, and specifically to a DEM-based river valley cross-section morphology algorithm. The algorithm includes the following six steps of (1) pre-processing data based on a DEM; (2) calculating sectional river network data; (3) calculating river network vertical data; (4) drawing a contour line of the valley bottom of a river valley; (5) calculating a width value of the valley bottom; and (6) drawing a profile map of the cross-section morphology of the river valley. The important quantitative indictors for describing the morphology of the river valley can be obtained by calculation according to the invention, which are the contour line of the valley bottom of the river valley, the width value of the valley bottom of the river valley and the profile map of the cross-section morphology of the river valley. These quantitative indicators can reveal the formation and development of a river, the construction situation of a valley landform and so on, and are of great theoretical significance for the study of the classification and management of rivers, the prediction of a river blocking probability of the landslide mass, the calculation of ground motion parameters and the like.

A method for purifying pollutant river by stting up purifying regions on river beach or lake beach wet zones includes a primary purification and deep goingp urification. A pollute cut-off gate is set on the pollutant river, an outlet is set on the course in front of the gate, a deposit pool surrounded by grates stopping pollutes at the back of the outer, water from the deposit pool flows into the deep going purifying biological intensifying deposition pool cultivating suspending plants, water from it flows into distributing ditches then to the underflow wet zone pipe with a gag at the pipe outlet and an outlet on the pipe wall, limestones, cobbles are laid in layer on the pipe to let the water flow to a collecting ditch then to the surface wet zone with plants grown there and water coming out from the wet flow to the lower reach river courses.

The invention relates to a confined water and phreatic water compound simulation experiment device, comprising a water storing tank and a simulation tank, wherein an organic glass tank body is obliquely arranged in the simulation tank, the top of the elevating end of the organic glass tank body extends out of the simulation tank to form a simulated river feeding zone, the plunging end is provided with a rising water wall, a confined aquifer is arranged in the organic glass tank body, and a phreatic aquifer is arranged on a waterproofing top plate of the organic glass tank body between the top of the elevating end and the rising water wall of the organic glass tank body; one end of a simulated water drawing well tube sequentially passes through the phreatic aquifer, the confined aquifer and the simulation tank and extends into the water storing tank, a plurality of holes communicated with the confined aquifer are arranged on a wall at the confined aquifer, and the lower ends of at least four confined water level piezometer tubes sequentially pass through the phreatic aquifer and the confined aquifer and are fixed on a waterproofing bottom plate. The invention has the advantage of reasonable structure, can demonstrate the feeding, running-off and draining features and the complementary relationship of the confined water and the phreatic water, and provides an effective measure for relevant tests and researches on the confined water and the phreatic water.

The invention relates to an experimental device for supersaturated total dissolved gas of the downstream water body of discharging water of a dam. The device comprises a water column, valves, a flowmeter, an air compressor, a manometer, a total dissolved gas tester and a stirrer. A first valve and the flowmeter are respectively connected with the bottom of the water column by a pipeline, the outlet of the air compressor is communicated with the flowmeter by a second valve through one end of a three-way pipe, and is communicated with the atmosphere by a third valve through the other end of the three-way pipe; the scale position on the wall of the water column is connected with a latex pipe which is connected with the manometer; the total dissolved gas tester and the stirrer are independent, and the total dissolved gas tester is placed into the water column when measuring. The device of the invention can measure and control main physical parameters which influence the generation and release of supersaturated total dissolved gas such as water body pressure, aerification quantity, water depth and turbulent strength, so as to carry out quantitative analysis to the total dissolved gas, and therefore the device of the invention has important promoting effects for the protection of river aquatic ecological environment and the establishment of ecology friendly hydraulic engineering.

The invention relates to a neural network method for predicting river flow rate based on multi-section water levels. The neural network method includes the steps of acquiring known flow rate data and water level data of a to-be-solved hydrometric station last year as well as water level data of m upstream gauging stations and n downstream gauging stations of the hydrometric station, and numbering the water level data so as to obtain water level data of the gauging stations; enabling the water level data measured at the same time last year, the water level data of the adjacent upstream gauging stations and the water level data of the adjacent downstream gauging stations to form groups of independent variables Hi; subjecting each group of independent variables Hi and flow rate data Qi at the corresponding time to BP neural network fitting; according to a time corresponding to known to-be-solved flow rate data Qm, taking the water level data measured at the time as independent variables Hm; substituting the independent variables Hm into a BP neural network model to obtain the corresponding flow rate data Qm so as to obtain a water level-flow rate relation curve and achieve prediction on the river flow rate.

The invention relates to a river health assessment method suitable for a sediment-laden river, the method gathers data from, Target setting, survey of current situation, system Analysis, comprehensiveevaluation and so on, a systematic and comprehensive health assessment index system for sediment-laden rivers is established, with reference to relevant regulations of the Ministry of Water Resources, to study and establish river health assessment methods, Index scoring method and evaluation standards, the river and lake health evaluation index system is designed, through the hydrology and waterresources, physical structure, water quality, biological and social service function of five criteria layer of 12 compulsory indicators and 4 optional indicators for scoring calculation, to assess thehealth status of the river; The invention aims at the present situation that the research on the theory and method of river and lake health assessment in China is relatively backward and there is nomore complete assessment framework, constructs a river health assessment index system suitable for the characteristics of the rivers in the southern cities and a more systematic and comprehensive river health assessment index system, and carries out the health assessment work of the rivers in the southern cities.

The invention relates to water quality detection equipment for water conservancy, in particular to river water quality detection and sampling equipment for water conservancy projects. The technical problem of the invention is to provide river water quality detection and sampling equipment for water conservancy projects, which can sample water of different depths and improve the accuracy of river water detection. The river water quality detection and sampling equipment for water conservancy projects comprises a bottom plate, a collection box, a support plate, a piston cylinder, a first one-wayvalve, a water delivery pipe, a spray head, a second one-way valve, a hose, a piston block, a first bearing seat and the like, wherein the collection box is placed on the right side of the bottom plate; the support plate is connected to the middle part of the upper side of the bottom plate; the piston cylinder is connected to the lower part of left side of the support plate; and and the first one-way valve is connected to the right part of the lower side of the piston cylinder. A filter screen of the river water quality detection and sampling equipment provided by the invention penetrates intodifferent depths in a river, and can sample river water of different depths, thereby improving the detection accuracy of river water; and the arrangement of a ratchet wheel and a cone block can indirectly sample river water.

The invention provides a river ecological flow determining method with the benthos diversity as a target. By means of the method, the research methods of ecological water requirements are enriched, and meanwhile, the ecological flow determining method with benthos as indicator organisms is provided. The method comprises the steps that river segment selection is researched; the benthos in a river segment are researched and ecological environment elements are inspected on site; the type of a benthos habitat and the characteristic parameter threshold value of the benthos habitat are determined; the optimal type of the benthos habitat which maintain the benthos diverse is determined; the fluvial geomorphology measurement of the river segment is researched; a two-dimensional hydrodynamics modelis constructed; the benthos habitat of the river segment is simulated in different flows; the optimal flow for maintaining the benthos diverse is determined. The method has the advantages that the ecological flow which enables the benthos diversity to be highest can be very accurately obtained, and the problem that by means of a general ecological flow determining method, the result cannot reflect the actual demands of aquatic organisms is solved.

The invention discloses a method for extracting mountain river information. The method comprises the following steps: performing radiation calibration, atmospheric correction, mosaicing and cutting processing on remote sensing image data information of a land satellite Landsat 8 OLI; calculating a composite spectral threshold water index; extracting a mountain shadow of a study area according to DEM data of the study area; extracting a river network of the study area according to the DEM data of the study area, and establishing a river buffer area; calculating the land surface temperature of the study area; calculating surface albedo of the study area; calculating the NDBI (normalized difference build-up index) of the study area; resampling the land surface temperature, surface albedo andNDBI layer of the study area for standard treatment to eliminate incorrectly extracted building information; performing small hole elimination and gap filling on the extracted small rivers in the study area are filled by closed operation and filtering operation in mathematical morphology filtering. The technical problem that accuracy of information extraction for mountain rivers in the prior art needs to be improved is solved.

The invention provides a method for calculating an ecological environment water demand threshold value, and particularly relates to a method for calculating ecological environment water demand based on an ecosystem health grade method and a restoration grade proposal method. The method uses ecosystems of various types comprising rivers, lakes, wet lands and dry land natural vegetation and urban natural systems as an interactional whole, divides the ecological environment water demand into different grades such as minimum, proper, ideal and the like according to the ecological environment water demand safe threshold value theory, and is contacted with the ecosystem health level so as to establish an integral estimation model of the ecological environment water demand. The method is closely connected with the health condition and restoration grade proposal of the ecosystem, and has the advantages of definite management target, consistency with related planning, strong systematization, easy data acquisition, simplicity and feasibility, and the like.

The invention provides a detachable multifunctional bent river channel water circulating system. The bent water circulating system consists of a support structure, a water pump, a 90-degree bent segment, a bent channel segments, a direct channel segment, an energy dissipation grating, a water tank, a telescopic pipeline segment and a measuring device, wherein the bent channel segments are riveted. The system has the advantages of simple structure, high operability, easiness for detaching and carrying and wide research application. The detachable multifunctional bent river channel water circulating system is used for researching the water flow characteristics, sediment movement characteristic and interaction characteristic of flow and sediment in direct channels and bent channels, and has great meaning on the experimental researches of hydraulics, river dynamics direction and sediment dynamics direction.

The invention provides a river water level prediction method based on chaotic fireflies and a gradient lifting tree model, and relates to the technical field of information and hydrological conditionprediction. Firstly, data is collected, and required data is divided into five classes; and then data preprocessing is carried out, including abnormal value elimination, missing value processing and data normalization. The improved chaotic firefly algorithm is used for optimizing training parameters of the gradient lifting tree model, and the improved gradient lifting tree model is applied to river water level prediction research of structural data. Finally, constructing a training sample set;randomly adopting a part of five types of data obtained after processing for model training; accordingto the method, a GSO algorithm is used for optimizing and parameter tuning is carried out to obtain a GBDT model under optimal parameters, the generalization ability is better, the water level prediction precision of the model is improved, finally, a test set is combined for carrying out model inspection, errors between an obtained actual value and a calculated value are compared and analyzed, and the good performance of the model is verified.

The invention discloses a tidal-reach ecological-environment water demand amount calculation method. Requirements of a tidal reach for maintaining basic river ecological-environment functions and satisfying water-salt balance, percolating recharging and river dilution and self-purification functions are considered on the basis of clarifying a tidal-reach ecological-environment water demand amountconcept, and composition of tidal-reach ecological-environment water demand amounts is clearly defined; an ecological-environment water demand amount model of the tidal reach on the basis of water quality consideration is constructed, and an ecological-environment water demand amount of the tidal reach on the basis of water quality consideration is calculated; an ecological-environment water demand amount model of the tidal reach on the basis of silt scouring and harbor protection consideration is constructed, and an ecological-environment water demand amount on the basis of silt scouring andharbor protection consideration is calculated; a basic riverway ecology water demand amount demanded by the tidal reach is determined on the basis of long-series flow data; and finally, a riverway ecological-environment water demand amount of the tidal reach of a coastal area is determined through comparing the ecological-environment water demand amount demanded by the tidal riverway in consideration of a water quality factor and the ecological-environment water demand amount demanded in consideration of silt scouring and harbor protection.

The invention provides a river ecology monitoring method. The method includes monitoring water quality and hydrology of surface water; monitoring the water quality and hydrology of underground water; monitoring soil on river banks and bottom of river beds; performing observation, statistics and monitoring for aquatic organism in rivers and terrestrial organism in the river banks; and monitoring atmosphere within the scope of 5000m on both sides of the rivers. The river ecology monitoring method can provide effective monitoring guarantee for the river ecological management and provide basis for the ecological environment evaluation.