433 results about "Flood season" patented technology

The invention discloses a cascade reservoir combined flood scheduling optimization method coupled with flood control and power generation, which can coordinate flood control and power generation goals in flood scheduling, and adopt corresponding models for different standard floods, timely power generation pre-discharging and closing gates and staggered peaks, reducing flood seasons It is useless to abandon water to maximize the benefits of cascade reservoir flood control and power generation. The technical solution is: judge the level of the flood according to the real-time hydrometeorological information and flood forecast results. When the average inflow flow during the flood period is greater than the full flow of the power station, it will be judged as a major flood, otherwise it will be judged as a small flood; according to the different levels Different models are used to optimize the scheduling of different control objectives; under each different flow, constraint settings and control objectives, a number of different flood control schemes are obtained, which constitute a set of flood control schemes corresponding to a flood, as the basis for decision-making, if In the flood control scheme set, it is necessary to modify the inflow flow, so the simulated flood control calculation under various inflow conditions is repeated.

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 present invention relates to a regional automatic rainfall station hourly rainfall data quality control system and method. The control system comprises a radar raw data pre-processing unit, an input unit, a quality flow main unit, an output unit, a destination file drawing unit and a destination file output parameter unit, wherein the radar raw data pre-processing unit is connected with the input unit; the input unit is connected with the quality flow main unit; the quality flow main unit comprises a rainfall estimation module, a matching module and a quality control module; and one end of the output unit is connected with the matching module while the other end is individually connected with the destination file drawing unit and the destination file output parameter unit. The control system provided by the present invention is simple and reasonable in structure design and stable and reliable in operation. According to the control method, a face state of the rainfall can be accurately captured by introducing radar files, thus to effectively help to judge uncertain identification of extreme rainfalls in a flood season.

The invention discloses an urban flood prevention decision support system based on a big data technique. The urban flood prevention decision support system comprises steps as follows: S1, establishment of a historical water regimen database; S2, acquisition and storage of real-time water regimen data; S3, establishment of a combined water level prediction model; S4, real-time water regimen display and water level prediction; S5, statistical analysis of historical water regimen data. The system has the benefits as follows: the water level in 1-6 hours can be effectively predicted, so that decision support is provided for flood control and disaster reduction work when the urban flood season approaches. The system adopts a distributed database HBase and can effectively store mass water regimen data and cope with rapid growth of data, besides, a big data analysis engine Impala is used for real-time processing and analysis on mass historical water regimen data, intrinsic value of the historical data is explored with a data visualization technology and information guidance is provided for flood prevention work.

The invention discloses a complex step reservoir group water storage period optimized scheduling method which comprises the steps of S1, collecting basic information of a river basin; S2, dividing a complex step reservoir group into a plurality of sub-river-basin areas, and respectively calculating an after flood season of each sub-river-basin area; S3, estimating a probability that the flow of a branch flood prevention node exceeds a safe flow in each sub-river-basin area, and demonstrating feasibility of seasonal flood end water storage scheduling optimization by means of the probability; S4, constructing a multi-target water storage scheduling optimization model; S5, solving the multi-target water storage scheduling optimization model by means of a Pareto dynamic dimension searching method, and obtaining a certainty optimization scheduling result of a seasonal flood end water storage period; S6, extracting an optimization scheduling rule of the seasonal flood end water storage period by means of a large system polymerization / decomposition model; and S7, performing flood prevention safety examination on the optimization scheduling rule through using river basin designed flood as an input. The complex step reservoir group water storage period optimized scheduling method is a new method for complex step reservoir seasonal flood end water storage period optimized scheduling under a precondition that a flood prevention standard of the basin is not reduced.

The invention provides riverway water quality purification and ecosystem restoration adjustable wetland technology, which comprises that: a rubber dam with adjustable height is arranged in a riverway; potamogeton plants are planted at the upstream of the rubber dam of the riverway to form artificial wetland; the planting density of the potamogeton plants is between 20 and 30 clusters / m, and a cluster is between 3 and 4 plants; the retention and purification time of river water in the artificial wetland is adjusted by adjusting the height of the rubber dam, the height of the rubber dam is improved in normal and dry seasons to store water to make the water level at the upstream of the rubber dam of the riverway improved, and the adjusting height of the rubber dam is determined by the COD concentration of the river water at the inlet of the artificial wetland and the temperature of the river water. By planting the potamogeton plants in the riverway to form the wetland, instead of lifting the water onto land to construct an artificial wetland, the technology can more directly and effectively restore the damaged riverway ecosystem, improve the water quality of polluted river water, and can ensure normal flood discharge of the riverway in flood season.

The invention discloses an integrated rainwater system for a sponge city and a construction method of the rainwater system. The rainwater system comprises a middle green belt and water storage tanks, wherein the middle green belt comprises a vegetation planting area and a rainwater infiltration area; a concrete course is arranged at the lower end of the rainwater infiltration area; a rainwater pipe is arranged at the lower end of the concrete course, and the rainwater pipe is connected to the water storage tanks; water pumping pipes are connected from the interiors of the water storage tanks; bidirectional nozzles are arranged at the other ends of the water pumping pipes; and water pumps are connected to the water pumping pipes. In accordance with the shortcomings of the prior art and the characteristics of the sponge city, the rainwater system, which integrates water seepage, water storage, water purification and utilization, is designed, and the construction method of the rainwater system is correspondingly designed; by promoting the water seepage with the adoption of vegetation, the problem of road water-logging is solved through slow discharge and controlled release; and in addition, some impurities in the rainwater are separated on the basis of the purification capacity of the vegetation, and the rainwater is stored in the water storage tanks and is used for spraying roads and watering the vegetation in dry season, so that adverse effect caused by drought and flood seasons can be effectively relieved.

The invention discloses an ecological comprehensive treatment system of a northern mountain river channel. The system comprises three sub ecological systems of an ecological permeable dike built on the upstream of a main stream and a branch stream of a mountain river, a reservoir pond arranged at the middle and downstream area of the mountain river and a wet land communicated with the reservoir pond, and adopts an ecological treatment mode of closure-storage-preservation. The construction method comprises the steps of: a) building of the ecological permeable dike; b) setting of a triangular pyramidal wood pile stone cage; c) building of the reservoir pond; d) planting of plants of the reservoir pond; e) building of a wet land system; and f) recovery of a river bank band. The system and the construction method can effectively intercept the mountain debris flow and the river non-point source pollution, adjust the river runoff, improve the hydrologic conditions of the mountain river in non-flood season, decrease the dry season of the mountain river, and facilitate to recover the ecological system of the mountain river. Meanwhile, traditional depressions and empty ponds in the mountain river can be used in construction, so that the engineering building cost is reduced, and the self-cleaning capacity of river water is improved.

The present invention relates to a pre-rainfall optimal parameter based flood forecasting method, and belongs to the technical field of flood forecasting. The method comprises the following steps: collecting statistics of the amount of the pre-rainfall in a forecast area before the occurrence of all historical flood in the forecast area; dividing the historical flood into a flood season group and a non-flood season group, and constructing a flood forecasting model for the forecast area; carrying out single parameter calibration on each historical flood so as to obtain a set of parameters for each flood; carrying out continuous parameter calibration respectively on the flood in the flood season group and the non-flood season group so as to obtain two sets of parameters, and dividing each of the two sets of parameters into two types of parameters of high sensitivity and low sensitivity; monitoring and recording daily rainfall data in real time, and collecting statistics of the amount of the pre-rainfall of the rainfall; and calculating a close degree between the amount of the pre-rainfall of the rainfall and the amount of the pre-rainfall of the historical flood, and taking the minimum value of the close degree as the flood forecasting model established by using the objective factor index so as to carry out flood forecasting. According to the method disclosed by the present invention, the accuracy and practicability of the hydrological model applied in flood forecasting are improved.

The invention discloses a labyrinth-type ecological purification pool suitable for a drainage ditch in a farmland. The labyrinth-type ecological purification pool is characterized by comprising a purification pool, a water separation wall, a purification box, an ecological floating bed, a flood drainage valve and a water outlet channel, wherein the purification pool is communicated with the drainage ditch and is divided into rotary labyrinth-type water flow channels by the water separation wall, so that the hydraulic retention time of agricultural sewage in the purification pool is effectively increased; the flood drainage valve is arranged at the middle of the water separation wall at the inlet of the purification pool, so that the inhibition of the purification pool to flood drainage in the farmland during a flood season can be eliminated; the purification box and the ecological floating bed are respectively arranged at the front segment and rear segment of the water flow channels of the purification pool, so that the two-stage purification treatment to the sewage is carried out. According to the labyrinth-type ecological purification pool, the content of eutrophic materials in farmland drainage can be effectively decreased; the non-point source pollution of the farmland is prevented from being diffused to the outside world. The labyrinth-type ecological purification pool has the advantages of being small in land occupation, high in purification efficiency, free of inhibition to farmland flood drainage, simple to manufacture, convenient to maintain and the like, thereby being suitable for large-area implementation.

The invention relates to hydraulically automatic lifting flood prevention walls which are arranged along the inner side of a river levee in a paralleling manner. Each hydraulically automatic lifting flood prevention wall comprises a driving device, locking mechanisms, vertical columns, a base and a baffle, wherein the base is a hollow cavity; the baffle is assembled in the inner cavity of the base through the vertical columns in the vertical direction; sliding chutes corresponding to the baffle are formed in the side parts of the vertical columns; the driving device corresponding to the baffle is arranged in the inner cavity of the base, and comprises a waterwheel and a pulley group; the waterwheel drives the baffle to move up and down through the pulley group along the sliding chutes; by the arrangement of the lifting baffle, the baffle is hidden in the base of each flood prevention wall in the non-flood season; when flood occurs and reaches a specific water level, the flood prevention baffle automatically rises up under the action of the traction force of the waterwheel; after the baffle rises up and reaches the upper parts of the vertical columns, bayonets at the top of the baffle are connected to the locking mechanisms on the vertical columns, to form a fixed connection relation; and the baffle is used for blocking the flood, to complete the flood prevention task.

The invention discloses a mobile, wireless and digital water level monitoring station system, belongs to the technical field of automatic detection, and is characterized in that the technical proposal of a mobile, digital and intelligent water level monitoring station system which utilizes solar power for power supply and wireless data for transceiving is adopted. The mobile, wireless and digital water level monitoring station system adopts an independent original technique of a query-typed digital water level sensor, applies the radio frequency technique into a hydrographic monitoring system, adopts solar power (or a dry battery) for power supply and a multi-mode information communication way, thus independently finishing data collecting, data processing and wireless data transmitting with direct network access of the water level information, having quick stationing and simple and fast installation, and being particularly applicable for station measuring in the remote condition without reliable power supply or temporary stationing in a flood situation and a flood season, and the station measurement does not need civil construction and the investment is a plurality of dozens percent of traditional station measurement. The mobile, wireless and digital water level monitoring station system can be widely used for the hydrographic monitoring occasions of large reservoir dams, riverways, water resource management and flood situation forecast, etc., particularly for a hydrographic measurement and forecast station in remote regions without reliable power supply condition.

The invention discloses a hydropower station hierarchical scheduling method and system with the combination of medium and long term forecasts. The hydropower station hierarchical scheduling method comprises the following steps that (1) a reservoir entry runoff series of guaranteed normal water supply years is divided into a high-flow year set, a median-water year set and a low-flow year set according to annual runoff; (2) hierarchical scheduling graphs are made for the reservoir entry runoff series in terms of the storage period and the delivery period; (3) corresponding reservoir scheduling graphs are selected in combination with qualitative medium and long term hydrologic forecast results and used for guiding operation scheduling of a hydropower station, wherein the high-flow year scheduling graph is selected for the high-flow years, the median-water year scheduling graph is selected for the median-water years, and the low-flow year scheduling graph is selected for the low-flow years. According to the hydropower station hierarchical scheduling method and system with combination of the medium and long term forecasts, the reservoir scheduling graphs are combined with the medium and long term forecasts, guaranteed output areas and increased output areas are divided again on the basis of the conception of output indication during the flood season, the adaptability of the scheduling graphs to different magnitudes of water inflow is improved, and the electricity generation benefits of the hydropower station are improved remarkably.

The invention discloses a cascade reservoir flood control water level real-time dynamic control method. The cascade reservoir flood control water level real-time dynamic control method comprises the following steps: (1) building a numerical meteorological hydrological forecast model of the flood season of a river basin, forecasting the flood process of the river basin of the future 1- 7 days in a rolling mode, (2) building a 'large scale system polymerization idea'-based random long-term optimization scheduling graph model, using a self-adaptive genetic algorithm to make a long-term optimization scheduling graph, (3) building a 'large scale system polymerization decomposition idea'-based cascade reservoir flood control water level real-time dynamic control model according to the coupling principle of long-term and short-term scheduling, and using a sequential optimization method to optimize and obtain a cascade reservoir flood control level real-time dynamic control scheme. The cascade reservoir flood control water level real-time dynamic control method can conduct unified schedule to all reservoirs in the upstream and the downstream of a cascade reservoir group, improve the power benefit of the cascade reservoir to the maximum under the premise that flood control safety of the cascade reservoir is guaranteed, is suitable for cascade reservoirs or reservoir groups flood resource scheduling, and can be widely applied to river basin cascade reservoir flood control water level real-time dynamic control.

The invention relates to a frame type low-position draining system tunnel lining structure. The frame type low-position draining system tunnel lining structure comprises a primary arch wall support structure, a secondary arch wall lining structure and a base plate which are sequentially arranged in an arch wall range from outside to inside and a water preventing and draining system located between the primary arch wall support structure and the secondary arch wall lining structure, wherein a tunnel bottom frame structure formed by foundation beams, short columns and crossbeams is arranged below the base plate to serve as the transverse bearing structure of the secondary arch wall lining structure and the vertical bearing structure of the base plate. The lower end of the draining system is arranged in a longitudinal tunnel draining channel in the internal space of the tunnel bottom frame structure in an oriented manner. The frame type low-position draining system tunnel lining structure has the advantages that a traditional tunnel lining tunnel bottom structural form is modified, the stress form of the tunnel bottom structure is changed, the effect of underground water on the tunnel lining bottom structure is reduced even eliminated, draining outside the lining structure is achieved at the same time, and accordingly the safety of the tunnel lining structure during operation especially in rainy and flood seasons is guaranteed.

The invention relates to cofferdams of embankment projects for rivers and lakes, in particular to a combined type movable cofferdam for embankment danger elimination and reinforcement. The cofferdam comprises two uprights, grooves are formed in opposite sides of the two uprights, the two ends of a mutual buckling slab are installed in the grooves I of the two uprights respectively, inclined rails are installed at the lower ends of the two uprights respectively, the other ends of the two inclined rails are connected through a fixed shaft, the included angle between the uprights and the inclined rails is an acute angle, grooves II are formed in the upper sides of the inclined rails, the lower ends of mutual buckling side plates are installed in the grooves II, reinforcement plates I are arranged on the two sides of the upper end and the two sides of the lower end of the mutual buckling slab, and reinforcement plates II are arranged on the two sides of the upper end of each mutual buckling side plate. Compared with the prior art, the cofferdam has the advantages that when a flood danger happens during the flood season, water stopping treatment can be carried out in time, further deterioration of the danger can be avoided, the cofferdam is of a combined structure and is convenient to disassemble and capable of being repeatedly used, and time and labor are saved.

The invention relates to a dynamic operation water level control method for a 3D or higher cascaded reservoirs in flood season. The method comprises the steps that 1) the relation of upper pre-impounded water level limits among the 3D or higher cascaded reservoirs is analyzed on the basis of an aggregation-decomposition theory and a pre-impounding pre-discharge method; 2) an optimized scheduling module which takes the minimal flood prevention risk rate, the minimal under-generation risk rate and the minimal under-impounding risk rate in the effective forecast period of a flood forecast as target functions, the operation water level in the flood season as a decision variable, and a manual fish swarm algorithm as an optimized solution algorithm is established, a non-inferior solution set is provided for dynamic operation water level control in the flood season, and a decision scheme set is provided for a multi-target decision module; and 3) the multi-target decision module which takes the minimal flood prevention risk rate, the minimal under-generation risk rate, the minimal under-impounding risk rate, the maximal generation capacity and the maximal impounding rate as evaluation indexes and a network analysis method as a multi-target evaluation method is established, and a preferable decision scheme of the dynamic operation water level control in the flood season is selected. Thus, theoretical basis and technical support are provided for scientifically making a combined dynamic operation water level control scheme for the cascaded reservoirs in the flood season.

The invention discloses a constructing method of a through steel box arch bridge. Construction is conducted in the sequence of arches first and then beams, and the method includes the main bridge starting section construction process, the support area main beam construction process, the support area arch rib construction process, the cantilever area arch rib construction process, the hanging rod construction process, the cantilever area main beam construction process, the bridge deck slab construction process and the system conversion construction process. Cable hanging construction is adoptedfor the cantilever area arch rib construction process and the cantilever area main beam construction process. By means of the construction method, the construction period can be effectively shortened, the work efficiency is improved, it is ensured that the bridge profile conforms to the design and standard requirements, risks can be reduced, and the potential safety hazards of upstream power station discharged flood and rainy flood season flood on temporary supporting piers and other structures at the center of a riverway are reduced to the maximum extent.

The invention discloses a box type tunnel-bottom composite arched tunnel lining structure with a water drain function, so as to effectively prevent underground water from being introduced into a tunnel, to overcome the immersion, which is caused as the water discharge capacity of side ditches and a central ditch in the tunnel are insufficient in a rainfall-flood season, of a road bed by the underground water, and to guarantee that an underground water level is lower than the bottom plate of the tunnel, thereby removing the risk that the underground water destroys a lining structure, particularly a tunnel-bottom structure, in the rainfall-flood season. The box type tunnel-bottom composite arched tunnel lining structure with the water drain function comprises an arch wall primary supporting structure, a secondary lining structure and base leveling layers, wherein the arch wall primary supporting structure, the secondary lining structure and the base leveling layers are arranged from exterior to interior; a waterproof water drain system arranged between the arch wall primary supporting structure and the secondary lining structure communicates with a central water discharge channel. The secondary lining structure comprises an arch wall secondary lining and a box type bottom plate structure which consists of a bottom plate and a channel plate; the two ends of the bottom plate are fixedly connected with the bottom end of the arch wall secondary lining; the channel plate is sunken relative to the plate surface of a top plate to form the central water discharge channel. The upper parts of two side walls of the channel plate are provided with water sluicing pipes which are buried at intervals along the extension direction of a line; the inner end of each water sluicing pipe communicates with the central water discharge channel; the outer end of each water sluicing pipe penetrates through the base leveling layers to a base of the tunnel.

The invention relates to the technical field of bridge construction and discloses a method for stopping horizontal oscillation in a large-scale steel open caisson construction. The method comprises the following steps: adding a new oscillation stopping locating boat (8), a new locating boat main anchor (9) and a new pull cable (10); when a steel open caisson (1) swings in the horizontal plane, synchronously tightening the new oscillation stopping locating boat (8) and the new locating boat main anchor (9) which are arranged at one side of the open caisson in which large deviation and high amplitude of oscillation are produced, wherein the tensile force of a single anchor rope is controlled to be within 40t; synchronously tightening a side anchor (11) at one side of the steel open caisson where large deviation and high amplitude of oscillation are produced and the side anchor arranged at the other side of the steel open caisson (1), wherein the tensile force is controlled to be within 10t; and synchronously twisting a front locating boat (2) and a rear locating boat (5) with the steel open caisson (1). By applying the method provided by the invention, the amplitude of horizontal oscillation of the steel open caisson in a flood season construction can be controlled to be reduced, and the method is convenient to operate.

The invention discloses a gantry crane device with lengthways and transverse traveling functions. The gantry crane device comprises a main steel girder and a hoisting mechanism, wherein a first auxiliary supporting leg, a first main supporting leg, a second main supporting leg and a second auxiliary supporting leg are arranged on the main steel girder in turn; the roller box traveling direction of the first main supporting leg and the second main supporting leg is vertical to that of the first auxiliary supporting leg and the second auxiliary supporting leg; and the roller box height of the first main supporting leg and the second main supporting leg is different from that of the first auxiliary supporting leg or the second auxiliary supporting leg. The gantry crane device has the advantages of high hoisting capacity, novel concept, and simple structure and is convenient to operate, is safe and reliable and is not affected by a rainy season and a flood season. In the water conservancyproject flood discharge gate hoisting construction technology, compared with the normal large crane, the gantry crane device has great advantages in economy and technology, and can simplify construction procedures to adapt to various hoisting working conditions, speed up a construction progress and highly reduce a safety hazard.

The invention discloses a mountain area river ecological runoff calculating and application method, and solves the problems that mountain area small and medium river annual rainfall distribution is not even, water inflow in a dry season is insufficient, and limited ecological runoff cannot satisfy wide and shallow riverbed full coverage and current continuity; the method comprises the following steps: using a Tennant method to calculate the minimum ecological runoff volume that satisfies the riverbed ecology system basic demands, wherein the minimum ecology flow cannot cover the whole riverbed and form certain depth in a non-flood season; using the minimum ecology flow as the design flow, and using a manning formula to calculate to-be-drilled width and depth of the main channel riverbed; drilling down the riverbed in the main channel of the riverbed according to the calculated width and depth. Engineering measures can narrow and deepen the riverbed, so limited ecological runoff can flow along the riverbed center in the non-flood season, thus preventing riverbed cutoff, ensuring river water body continuity, ensuring riverbed ecology flow, and satisfying mountain area river aquatic biology survival and multiplying basic demands.

The invention discloses an L-shaped flood control wall structure and a flood control wall group. The L-shaped flood control wall structure is characterized in that a main water retaining plate is hinged to a bottom plate; waterproof cloth is mounted in the main water retaining plate and the bottom plate; supporting fixing seats and steel wire rope fixing seats are fixed to the main water retaining plate and the bottom plate; the main water retaining plate and the bottom plate form a flood control wall through supporting of inclined supporting rods and stretching of steel wire rope reinforcing ribs; a bottom plate of the flood control wall is fixed to the ground, and is firmly pressed on the ground through pull hooks and pressing screws; and the bottom plate and the ground form a sealed structure. According to the L-shaped flood control wall structure, the L-shaped flood control wall group is formed through combination of a plurality of flood control walls with the same structure, and the main water retaining plate and the bottom plate are supported and stretched through the inclined supporting rods and steel wire ropes, so that the integral firmness and stability are improved; the pull hooks on the bottom plate are fixed to the expansion bolts on the ground, so that the bottom plate and the ground are sealed; and after the water level rises, the bottom plate fits the ground more tightly under the action of water pressure, the higher the water level is, the better the sealing is, and the capacity, of resisting floods in the flood season, of the flood control wall is greatly improved.

The invention provides a seasonal design flow computing method for river-type water functional areas. The seasonal design flow computing method comprises the steps of establishing a distributed hydrological model and simulating and verifying the watershed hydrological processes of the river-type water functional area to be studied, establishing the corresponding relation of each river-type water functional area to be studied to each sub-watershed inside the distributed hydrological model, outputting the long series monthly runoff volume simulation results of each sub-watershed of a section under each river-type water functional area to be studied according to the corresponding relation, selecting the long series runoff volume simulation results of corresponding months of each river-type water functional area to be studied according to the design flow accounting rule of the river-type water functional areas to be studied according to the corresponding relation, ranking and selecting the flow having a certain assurance rate as the design flow of the river-type water functional areas to be studied. The seasonal design flow computing method for the river-type water functional areas is capable of checking the design flow of the water functional areas in each period by selecting different time periods (such as dry season, normal river flow period and flood season), and then capable of supporting delicacy management of the water functional areas.

The invention relates to the technical field of river bank greening, in particular to a method for planting river bank water-land ecotone vegetation. According to the method, the two ends of each planted plant are pressed and buried, vertical hole planting is adopted, in this way, the impact function of a flood on the plants is greatly reduced, the risk that tree trunks are broken is reduced, and therefore the survival rate of the water-land gravel ecotone vegetation is improved; the transversely planted plants have the function of intercepting floating objects and retaining silt, the scouring of water flow on herb between every two planting holes is reduced, and therefore natural recovery and growth of the gravel ecotone vegetation are promoted; in a flood season, the plants can absorb many harmful elements in water, so that pollution is eliminated, water is purified, the quality of a water body is improved, and the ecological function of the water body is recovered; after the vegetation grows up, the water-land ecotone has certain ornamental value even in a dry season.

The invention discloses a seawall flood season protection structure and a construction method thereof. The seawall flood season protection structure comprises a wave dissipating device, a wave power generation device, a dam and a buffer system. The wave dissipating device is movably connected to a first supporting structure. The first supporting structure comprises two parallel first supports. The two ends of the first supporting structure are fixedly connected to a speed reducing slope and a current stabilization slope through a foundation pile and a first positioning pile correspondingly. The wave power generation device is arranged at the tail end of the first supporting structure. A second supporting structure is arranged at the other end of the first positioning pile. The buffer system penetrates through the speed reducing slope, the current stabilization slope and the dam. The method includes the steps of surveying and setting out, construction of the foundation pile and the positioning pile, construction of the buffer system, construction of the wave dissipating device and the wave power generation device, construction of the second supporting structure and construction of the dam. By means of the seawall flood season protection structure and the construction method thereof, flood season installation protection of seawalls with different lengths and widths can be met, sediment loss is reduced, a good seawall protection effect is achieved, seawater power generation can be achieved, and economical benefits are remarkable.

The invention discloses a fire preventing and extinguishing system for a coal mine fully mechanized caving face in the mining stopping period in the flood season. A front drilled hole, a middle drilled hole and a rear drilled hole are formed in a front beam frame, a top beam and a tail beam of each support of the coal mine fully mechanized caving face respectively, first drilled holes, second drilled holes, third drilled holes, fourth drilled holes, fifth drilled holes and sixth drilled holes are formed in end openings of two gate roads, and high holes, middle holes and low holes are formed from the two gate roads of the coal mine fully mechanized caving face to goafs on the adjacent sides; after mining stops, the drilled holes formed in the corresponding areas are filled with high-efficiency cementing materials in a circulating pressure injection mode, the goafs of the coal mine fully mechanized caving face are filled with three-phase foam in an injection mode, the heat storage environment of float coal is damaged, the hidden danger of fires is eliminated, the phenomenon that fires happen on the coal mine fully mechanized caving face in the mining stopping period in the flood season is completely eradicated, and the safety degree of a mine in the mining stopping period is improved.

The invention relates to a hydraulic and hydroelectric engineering construction diversion risk analysis technology and aims at overcoming the shortcomings of a traditional high rock-fill dam medium-term food season water retaining risk rate detection technology, providing a novel high rock-fill dam medium-term food season water retaining risk rate detection method, accurately and reasonably quantifying the medium-term food season water retaining risk rate and providing important basis for food season security risk assessment, construction schedule formulation and the like. The uncertainty of flood prevention food season elevation is considered in the method, and a high rock-fill dam project medium-term food season water retaining risk rate mathematical model is established. The uncertainties of shutdown day number and the daily average rising speed each month are considered, and a simulating calculation model of a dam body flood preventing flood season elevation is established. The randomness of the daily average rising speed each month is subjected to quantitative analysis. The randomness of hydroelectric, hydraulic and filling construction is comprehensively considered, and the water retaining risk calculation process is provided by coupling risk elements based on a Monte-Carlo method principle. The high rock-fill dam medium-term food season water retaining risk rate detection method is suitable for high rock-fill dam medium-term food season water retaining risk rate assessment.

The invention discloses a three-in-one small reservoir or silt dam flood season early warning method, wherein three refers to a weather forecasting layer, a water level early warning layer and a floodcontrol emergency layer. The method specifically comprises the steps: in the weather forecasting layer, the rainfall p of different rainfall repetition periods can be predicted in advance according to the historical rainfall data around a reservoir, the rainfall p can be predicted on a large scale according to central or local meteorological stations, and the real-time rainfall p can be obtainedbased on selected precipitation stations; in the water level early warning layer, the water level h in front of a dam is predicted according to the rainfall p and the rainfall-runoff formula, or the water level h in front of the dam is monitored in real time, and then three-level water level early warning is carried out; and in the flood control emergency layer, according to the three-level earlywarning information, corresponding flood control emergency measures are issued, and early warning information and emergency information are automatically pushed to relevant organizations or individuals at the same time. The invention considers three kinds of rainfall forecasting, three kinds of water level early warning and three kinds of flood control emergency measures, and constructs a whole set of multi-angle, multi-level and multi-measure integrated early warning method, which can achieve the effect of safe flood passage in small reservoirs or silt dams in small watersheds.