67 results about "Tidal river" patented technology

The invention relates to a method for utilizing a buffer strip to control agricultural non-point source pollution of a tidal river network area of a plain, belonging to the technical field of environmental protection. The method comprises the following steps of: selecting buffer strip areas, carrying out primary treatment to the buffer strip, setting a water distribution system of the buffer strip, selecting and planting plants in the buffer strip and introducing water source into the buffer strip. The method has the characteristics of simpleness, convenience, practicability, good purifying effect and free maintenance management.

The invention provides a method for forecasting the tide level in a tidal river network and belongs to the technical field of hydrodynamic force simulation and hydrologic forecasting. A computational fluid dynamics (CFD) method and a water level forecasting method are comprehensively applied, the problem that the water level in the tidal river network is difficult to accurately forecast due to multi-branch stream bypass flowing and open sea tide influences is solved, and the application range and precision of tidal river network tide level forecasting are improved. The method mainly comprises the following steps that firstly, a tidal river network region and upstream riverway one-dimensional hydrodynamic force mathematical model is established; secondly, the hourly tide level processes of a control station of a river mouth are precast through harmonic analysis, and forecast values are corrected through measured data of the day before forecasting; thirdly, flow processes of control stations of an upstream are derived through a weighted moving average method; fourthly, tide level processes of all fracture surfaces in a tidal river network region are solved through the tidal river network region and upstream main stream area one-dimensional hydrodynamic force mathematical model, and the tide level forecasting of any fracture surface in the river network region is achieved.

The invention relates to a flood combined probability analysis method and an application thereof based on Copula. The flood analysis method is aimed at providing a flood control construction basis for tidal river reach, and mirroring functions of affecting overflowing of flood facilities and characteristic quantity of regulation and storage capacity through creation of a joint probability distribution function about sea level, rainfall peak and subrainfall so that reliable basis is provided for anti-flood construction.

The invention relates to a pollution control method of farmland drainage in a plain tidal river network area, belonging to the technical field of environmental protection. The pollution control method comprises the following steps of: preliminarily clearing up a drainage ditch, and respectively sloping the bottom and the side slopes of the ditch along the farmland runoff water drainage direction to prepare ecological drainage ditch; then, reinforcing the side slopes of the ecological drainage ditch by using slates or porous water-permeable plates, and cultivating ecological plants on the side slopes and the bottom of the ecological drainage ditch in sequence; and finally, arranging a water collection tank at the junction part of the farmland drainage and the ecological drainage ditch. Runoff water flows into a river after being purified by the ecological drainage ditch. The invention has the characteristics of simplicity, convenience, practicability, good purification effect, good landscape effect and the like.

The invention discloses a control technology of putting down, touching rocks and settlement of a super cofferdam. The invention belongs to the bridge engineering foundation construction field and is applicable to the cofferdam construction in the bridge high-low pile cap foundation. Namely the invention adopts the control technology of putting down, touching rocks and settlement to realize controllable initiative, adjustable ration, controllable position and adjustable deviation during the settlement of the cofferdam. The technology adopts a uniquely designed lifting system and a horizontal guide device to ensure that the cofferdam is safely and accurately settled to the designed position under the synchronous action of the lifting system and the horizontal guide device and through the wall cabin batch water filling mode as well as under the controllable state that the gravity is greater than the buoyancy. The invention effectively solves the problems of putting down and touching rocks of the super cofferdam as well as the settlement precision in the covering layer under the disadvantageous conditions such as tidal rivers with frequent hydrologic change, bigger riverbed height difference and so on, and improves the installation accuracy of the cofferdam.

The invention discloses a method for short-term prediction of salt tide at a water intake in a tidal river region. The method comprises the following steps of: analyzing the following influencing factors: the flow of upstream hydrologic monitoring stations and the tide level difference, water unavailable hours and average chloride concentration of the water intake in a day so as to establish a BP-RAGA coupled neural network salt tide forecasting model and predict the water unavailable hours and average chloride concentration of the water intake in the next day; and determining the water available hours and amount of each water intake on the basis of the prediction so as to determine the time and space distribution of raw water intaking amount of the tidal river in the next day and finally draw up a dispatching predetermined plan of a raw water system by combining an optimal dispatching module of the raw water system, so that the safe operation of the raw water system and safe urban water supply are ensured. Compared with the conventional prediction systems, the method can dynamically determine the weight of each influencing factor in the prediction module by fully using existing information, improve the sensitivity and precision of the prediction and have lower rate of missing report and false report.

The invention discloses a multistage compound strengthening and purifying method for a tidal waterway in a coastal city. The method comprises the following steps: at the aim of the requirements of ecological restoration to tidal waterways in coastal cities, regional division is performed on the tidal waterway, and the tidal waterway is divided into a region A, a region B, a region C, a region D and a region E in sequence; a first front setting tank is arranged in the region A, intensifying and clarifying tanks are formed in the region B and the region C, and a plurality of artificial aquatic-plant regions and artificial aeration regions are arranged in the intensifying and clarifying tanks; an ecological restoration and landscape repairing regions are arranged in the region C; porous ecological walls are arranged on the frontiers of the region B, the region C and the region D. The method provided by the invention is also suitable for ecological management to common city river ways, is particularly suitable for ecological restoration and treatment to tidal river courses influenced by sea water in coastal cities, has a remarkable effect for enhancing the landscape function of city river reach, and is classified as a scientific, effective and sustainable environment friendly treatment method.

The invention puts forward an urban tidal river reach ecological water demand prediction method based on a neural network, and belongs to the field of ecological hydrology. The method comprises the following steps that: firstly, carrying out statistics on the monthly seawater salinity and sea-entering water quantity of the estuary of the urban tidal river reach in multiple years to obtain the monthly salt balance water demand of the river reach and establish the monthly salt balance water demand prediction network of the urban tidal river reach; then, independently obtaining the monthly average rain capacity, average sea surface temperature, total sewage discharge amount and ecological water demand of the river reach, and establishing the monthly ecological water demand prediction network of the urban tidal river reach; and independently obtaining the prediction value of the monthly total sewage discharge amount, the monthly sea-entering water quality prediction value and the monthly average rain capacity prediction value of the river reach in certain year in the future, inputting into the ecological water demand prediction network, and outputting the ecological water demand prediction result of the urban tidal river reach under different conditions. By use of the method, the special properties of the urban tidal river reach are comprehensively considered, a practical situation is conformed, the change situation of the river reach ecological water demand in the future is predicted, and a reference is provided for a decision department.

The invention discloses a temporary cofferdam applied to maintenance of an urban tidal river concrete anti-flood wall and a construction method thereof. The temporary cofferdam is composed of an arched pipe bag, side reinforced belts, annular reinforced belts, impervious blankets, end reinforced and impervious curtains and anchoring components. A plurality of grouting openings and sealing plugs for water filling and draining are arranged on the upper portions of the facing-water sides of the pipe bags, the walls of the water facing sides and the land sides of the pipe bags are integrally combined with the high-strength reinforced belts to form the side reinforced belts, and the impervious blankets outwards extend out of the side reinforced belts on the water facing sides and are pressed by a row of small sand bags; the two ends of each pipe bag are provided with the annular reinforced belts which are integrated with the side reinforced belts, and the annular reinforced belts extend outwards to form the horn-shaped end reinforced impervious curtains to be connected with an original wall and anchored and sealed by the anchoring components; the end reinforced and impervious curtains and the impervious blankets are integrated to form a sealed water retaining structure with the arched pipe bags. The temporary cofferdam has the advantages of being simple in structure, safe, reliable, convenient to transport and store, quick to construct, capable of being repeatedly used, friendly to the environment, and the like.

The invention relates to a method for improving a flow state of a tributary entrance water diversion hub of a tidal river reach. Hydrologic data of the tidal river reach is collected, an included angle between a main channel of the tidal river reach and an intake channel is designed according to actual water flow conditions of the reach, water flow conditions of a newly-built river are analyzed, and assistant rectification is performed by utilizing rectification piers and a flow isolating wall according to the actual water flow conditions. A river channel trend designed according to the flow state improvement method can make water flow entering the intake channel smoother; meanwhile, bank slope washing out by the water flow is also reduced, a river regime is more stable, and the method is of great significance for long-term stable implementation of a hub function. Meanwhile, the rectification piers and the flow isolating wall are adopted for assistant adjustment, so a regulating sluice entrance flow state can be improved, and the hub flow capacity is improved.

The invention relates to a tidal river reach fishway inlet design method and a fishway inlet. The method comprises the steps of: typical tide process selection; tide level calculation; fishway inlet section hydraulic characteristic calculation; fishway inlet arrangement and water level design; and fishway inlet parameter determination. The method builds a flux and reflux model of a tidal river reach by tide current principles and tidal river reach hydraulic characteristics, calculates various types of tidal ranges and the tide level change conditions through the model, calculates and determines optimal fishway inlet positions of various tide levels to adapt to the flows, the flowing directions and the water level changes of different tide currents through the fishway inlet section hydraulic characteristics, improves the fishway fish passing efficiency, reduces the influence on fish stop by the hydraulic engineering construction, and achieves important significance on protection or repair of the river ecological environment.

The invention provides a risk assessment method for city waterlogging taking water level jacking influence of tidal rivers. The method comprises following steps: determining probabilities of simultaneous distribution between rainstorms-tidal river water levels, determining a hydraulic computation grid of a hydrology-drainage system for analyses of city waterlogging risks, creating a coupling model of a hydrology-drainage system to calculate a waterlogging parameter h in the grid, creating a waterlogging risk analyzing map taking water level jacking influence of tidal rivers, covering probability density of simultaneous distribution to a hydraulic grid of the hydrology-drainage system, connecting same waterlogging parmaters h to the isoline Lh; and calculating different occurrence probabilities of h0 to obtain city waterlogging parameter values in different recurrence intervals. The risk assessment method for city waterlogging taking water level jacking influence of tidal rivers has following beneficial effects: rainstorms and high water levels of tidal rivers can be imitated within the extreme value range so that low dependence is on hydrologic hydraulic historical data, thereby enhancing engineering practicability; and only by calculating the combined scene between a specific hydrology-drainage system and the hydraulic grid, coupling events of rainfall and tidal river water levels are not needed to be imitated so that assessment efficiency is greatly increased.

The invention provides a tidal river sewage treatment and aquiculture integrated system which comprises aquaticplant floating blanket zones and a freshwater mussel culture zone arranged in the tidal river, wherein the freshwater mussel culture zone is arranged in the middle of the tidal river; and the aquaticplant floating blanket zones are arranged at two sides of the freshwater mussel culture zone. The aquaticplant floating blanket zones are divided into an emergent aquatic plant zone, a floating plant zone and a submerged plant zone according to the decontamination capability. Since emergent aquatic plants, floating plants and submerged plants are sequentially cultured in a riverway disclosed by the invention, the riverway is progressively purified layer by layer. In addition, different aquaticplants are subjected to reasonable companion planting and have purification capability all year round. The mussels in the freshwater mussel culture zone in the invention not only can be used for filtering phytoplankton and reducing algal bloom, but also can be used for ensuring that no heavy metal substances exist in meat of the mussels.

The invention discloses a method for predicting influence of tidal action on river water quality based on a river water quality model in the technical field of water quality prediction. The problem that in the prior art that a traditional river water quality model is low in tidal reach water quality simulation accuracy is solved. According to the method for predicting the influence of the tidal action on the river water quality based on the river water quality model, the defect that a traditional river water quality model is low in accuracy of simulating the water quality of the tidal reach isovercome, and the method has important significance in pollutant control of the tidal reach seriously affected by the tidal action. Compared with a previous tidal influence evaluation means, the method has the advantages that the influence of the tidal action on the concentration of pollutants such as ammonia nitrogen and total phosphorus in the tidal river reach can be quantitatively identifiedon the basis of the river hydraulic water quality model, so that a more accurate and effective river pollution control means can be provided.

The invention discloses a method for calculating a water level flow relation under a tidal reach sluice, and belongs to the technical field of water conservancy projects. In order to conveniently andaccurately determine the water level flow relationship under a river mouth tidal reach sluice, a MIKE21 hydrodynamic module is utilized to establish and verify the two-dimensional mathematical model of the tidal river reach, low tide and high tide encountered by sluice discharge are considered, and the water level flow relationship under the sluice is simulated and calculated for sluice energy dissipation and scour prevention design and sluice discharge capability rechecking. According to the method, different flows discharged by the sluice can be well matched with different high and low tidelevels, the calculation result is reliable, the water level flow relation under the sluice can be accurately obtained, and a scientific basis is provided for engineering construction.

The invention relates to an in-situ ecological restoration technology suitable for tidal inland river. Aiming at the problems that the urbanized tidal river net slow flow riverway and pond at Peral River Delta are serious in pollution and the pollution is hard to govern, a water pollution direct purification or on-site treatment system suitable for three-side hard riverway and internal lake (both coats are concrete or mortar stone land wall) is developed. The system is further suitable for other similar river or riverway and urban internal lake. The system is installed at the bottom of the riverway, the front section or each of the front end and the rear end is provided with a slow flow settling zone, the middle section is a biological treatment zone; the biological treatment zone comprises a sinking caisson (fixed at the bottom of the river), a jet stream or pushing flow aerator and distribution equipment; the sinking caisson is made of angle steel and reinforcing steel bar, a plastic geonet is added on the inner wall, a polyurethane-based netty and block type biological carrier is mounted in the geonet. The specific setting and system construction is as shown in the figure. The aeration debugging is performed after the system is established, and then the system can operate according to design parameters after achieving an ideal condition. The proper efficient microbial flora can be added in the debugging process according to water quality and treatment effect requirement, so that the domestication effect is better.

The invention relates to a tidal river self-purification type ecological restoration combined dam, wherein a water body ecology restoration zone comprises rubber dams, spur dikes, ecological reef groups, fixing tables and organism migration channels, wherein one end of the rubber dam is connected to a river bank through the fixing table, the other end of the rubber dam is connected to one side ofthe organism migration channel through the fixing table, and the spur dikes are arranged at the bent positions of the two sides of a river course, extend into the river course from the river banks andare sequentially arranged from the upstream to the downstream of the river course. According to the invention, by arranging the rubber dams, the reflux of tide water during tidal bulge is avoided, sothat the stable and low-flow-speed water area repairable environment is provided for the aquatic remediation area; by arranging the organism migration channels, the living habits of aquatic organismsare protected; the spur dike has interception and adsorption effects on nitrogen and phosphorus in the river way; and the ecological reef groups provide good hiding and breeding places for underwaterhabitats, planktons, fishes and the like, build and recover the local ecological environment of the river course, and increase the biological diversity.

The invention discloses a tidal river surge water treatment device. The tidal river surge water treatment device comprises an oxidation ditch, at least two aeration devices and a biofilm treatment device, wherein the oxidation ditch is built along both sides of river surges and form an S-shaped ditch body in the transverse direction of the river surges, both ends of the oxidation ditch, used as a water inlet and a water outlet, are communicated with the river surges; the aeration devices are respectively arranged at the water inlet and the water outlet; and the biofilm treatment device is arranged in the oxidation ditch. The tidal river surge water treatment device applies the oxidation ditch technology in a long and narrow river course environment, combines the oxidation ditch technology and the biofilm technology and has the advantages of the oxidation ditch technology and the biofilm technology. The oxidation ditch provides a relatively stable growing environment for microorganisms, thus the microorganisms are enriched in the oxidation ditch, high sludge concentration is kept and pollutants are degraded; and the biofilm technology is easy in management and the defects of the oxidation ditch such as the floating and swelling of sludge can be overcome.

The invention provides a method for integrating a tidal river network model and a drainage pipeline network model, comprising the following steps: firstly, educing a core function of the emulation of the tidal river network model, packaging the core function into a dynamic link library, and shielding the difference of different developing tools; secondly, packaging the core function in the dynamic link library into a C language interface confirming to the OpenMI standard based on an NET platform; and finally, integrating and interacting the core functions of the tidal river network model which supports an OpenMI interface and the drainage pipeline network model on an OpenMI platform. The invention realizes automatic interaction, dynamic coupling and simultaneous accurate calculation of the tidal river network model and a drainage pipeline network waterpower model, can comprehensively, truly and accurately represent the mutual effect and influence between area logged water draining and draining in a collecting area and provides a key technical support for optimizing the layout and the scale of a river network and pipeline network draining system, saving the engineering construction investment and realizing the pipeline network storage and drainage interconsistency and the sustainable development of the matching of sewage treatment and water environment improvement.

The invention relates to a radial tidal current river reach riprap falling distance prediction method, and the method comprises the following steps: establishing a radial tidal current river reach water flow condition prediction model based on a one-dimensional long river reach tidal current prediction mathematical model and a two-dimensional hydrodynamic mathematical model by carrying out a riprap settlement process water tank test, and finally, predicting the riprap falling distance in the radial tide process based on the radial tide reach water flow condition prediction model, a falling distance formula and a throwing construction control condition. By the adoption of the method, the riprap falling distance of the radial tidal river reach can be accurately predicted, the construction efficiency and quality are greatly improved, and reference and basis are provided for prediction of the riprap falling distance of the similar tidal river reach in the future.

The invention discloses a mathematical model-based urban waterlogging analysis method. The method comprises the following steps of s1, waterlogging cause analysis; s2, basic data collection; s3, modelconstruction and calibration verification; s4, multi-model coupling calculation; and s5, waterlogging influence analysis. According to the invention, the waterlogging forecasting model is established; the runoff production partitioning, river network generalization and flood evolution calculation are carried out on a research area; according to a model calculation result, waterlogging influence analysis is carried out on a research area, a geographic information technology, measured data and numerical simulation are organically combined, the influence of multiple factors is comprehensively considered, forecasting simulation is reasonably carried out on the urban waterlogging influence of the plain tidal river network area, and therefore the purposes of urban waterlogging scientific management and comprehensive prevention and control are achieved.

The invention discloses a method and a system for treating a black and odorous river channel with dual synaesthesia tides. The treatment system includes an upstream water inlet gate, a downstream water outlet gate and a control center; The upstream inlet estuary of the river channel, the downstream outlet gate is arranged at the downstream outlet estuary of the dual-sense tide black and odorous channel; the upstream inlet sluice gate and the downstream outlet sluice gate are respectively connected with the control center. Through the PLC automatic control system of the control center, according to the liquid level information fed back by the inner liquid level gauge and the outer liquid level gauge, jointly dispatch the opening and closing of the upstream inlet gate, downstream outlet gate, tributary estuary gate, large-flow axial flow pump, and large-scale drainage vehicle. closure. The method of the invention is suitable for the rapid and effective relief of the black and odorous river channels of the double synaesthesia tide, and does not affect the functions of flood control, navigation, waterlogging drainage and the like of the river channel, and is a double channel with the advantages of short construction period, low investment, low operation cost, convenient maintenance and the like. Comprehensive management methods for black and odorous rivers.

The invention discloses a tidal waterway gate pump dispatching method and an ecological restoration for a tidal waterway. The tidal waterway gate pump dispatching method comprises the steps that in the waterway dry season, a gate of a river mouth is closed; in the waterway flood period, when the tide is located at the low tide level, the gate of the river mouth is opened, flood is discharged into the sea, and water flows into the sea in one direction; and in the waterway flood period, when the tide is located at the high tide level, the gate of the river mouth is closed, the flood is discharged into the sea through a pump station, and the water flows into the sea in one direction. According to the tidal waterway gate pump dispatching method, the water gate, the pump station and other water conservancy facilities in the river network area are utilized, the water conservancy facilities are combined with regulation and control measures, reciprocating flow is changed into one-way flow, it is guaranteed that the upstream water body of the waterway is not jacked by the tide, and the discharging speed is increased; meanwhile, the dilution and self-cleaning functions of the water body are improved, the virtuous cycle is formed, the problem that the tidal river network is subjected to dual actions of tide and runoff, and pollutants flow in the river network area in a reciprocating manner is solved, and meanwhile the effect of tidal river section ecological restoration is improved.

The invention provides a tidal reach water environment capacity calculation method based on MIKE21. The contribution coefficient of each drain outlet to each control section is obtained through earlycalculation of the MIKE21 water environment mathematical model, so that water environment capacity calculation is evolved into solution of a linear programming problem, and the water environment capacity of the tidal river reach can be calculated by adopting a simplex method. The problems that an existing method is large in calculation amount, not unique in calculation result, greatly influenced by human subjective factors and the like are solved. The method relates to the field of environmental management such as tidal reach water environment capacity and total pollution discharge limit control, and can be widely applied to calculation of the environment capacity of a bidirectional flowing water body under the tidal action, and even can be applied to calculation of sea area water environment capacity.

The invention discloses a method for determining safe operation conditions of gate opening of a ship lock in a tidal river reach, and belongs to the technical field of water transportation. The methodcomprises: in a gate opening process, upstream and downstream having water level differences, setting different upstream and downstream water level differences, and establishing a relational expression between the water level differences and the gate front surface flow velocity; establishing a flow calculation formula in the gate chamber when the gate is opened, determining the average flow velocity in front of the gate through the formula, and establishing a relational expression between the water level difference and the gate hoist stress through stress analysis; according to the flow ratelimiting condition in the lock chamber and the maximum rated stress condition of the hoist, comprehensively obtaining a switch-on critical condition meeting the flow rate condition and the hoist stress condition. According to the method, the safe operation condition of opening the gate can be quickly obtained, so that the tide is utilized to open the gate to the greatest extent, and meanwhile, theblindness of experience operation is avoided.

The invention discloses a water flow tracing real-time monitoring system and a speed measuring method. The water flow tracing real-time monitoring system comprises a water flow tracing ball, and the water flow tracing ball comprises a positioning module, a communication module, a control module, a power supply module and a spherical waterproof shell. The positioning module is used for regularly orirregularly obtaining the position and time data of the water flow tracing ball, the control module is used for caching the positioning data and the time data, the communication module is used for regularly or irregularly sending the positioning and time data to the cloud platform monitoring system, and the spherical waterproof shell floats on the water surface at a certain immersion ratio. The water flow tracing ball is low in manufacturing cost, long in endurance time, simple in speed measurement operation, high in automation degree and capable of better adapting to measurement of surface flow velocity and flow fields of extreme scenes such as embankments, flood peaks, bay flow fields, tidal zone boundaries and tidal flow boundaries of tidal rivers, bidirectional jet flow of entrance water channels, storm surge and the like and water areas with special terrains. The invention belongs to the technical field of hydrological data measurement.

The invention relates to a water diversion and drainage junction overall flow state model test method for a tidal river reach tributary entrance. The flow state of the tidal river reach tributary entrance is simulated by adopting a partial river width model, and the deviation between the main stream flow quantity in a physical model and the practical flow quantity caused by the adoption of the partial river width model is reduced through flow quantity compensation. By the adoption of the method, the flow state of the tributary entrance under junction water diversion and drainage conditions canbe simulated accurately, and references and bases are provided for model tests of later similar projects.

The invention belongs to the technical field of environmental protection, and discloses a pollution control method for farmland drainage in a plain tidal river network region. The method includes the steps that a drainage ditch is primarily neatened first, then slope settling treatment is conducted on the bottom and the side slope of the ditch in the discharge direction of run-off water in farmland, and an ecological drainage ditch is made; afterwards, reinforcement treatment is carried out on the side slope of the ecological drainage ditch through slabstone or porous water pervious plates; then, turf is planted on the side slope of the ecological drainage ditch, and mixed planting in the sequence of turf planting, shrub planting and hygrophyte planting is performed at the bottom of the ecological drainage ditch in the flow direction of the run-off water in the ecological drainage ditch; at last, a water collecting groove is formed in the connecting position of a farmland drainage ditch and the ecological drainage ditch, an effluent weir is arranged at the water outlet end of the water collecting groove, and the run-off water flows into a river after being purified by the ecological drainage ditch. The pollution control method for farmland drainage in the plain tidal river network region is simple and convenient to use, practical, good in purifying effect and good in landscape effect.