40 results about "Flood stage" 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.

Methods and systems for normalizing flood warnings and potential flood levels across multiple river gauges by converting localized flood stage levels to a datum-based normalized value are disclosed. The normalized flood levels can then be used to plot flood levels from multiple river gauges on an inundation map. Methods and systems are also disclosed for creating animated inundation maps that illustrate flood levels geographically, and may include an indication of the certainty that flooding will reach one or more of the indicated flood levels through the use of multiple colors, shades, dithering, or the like.

The invention discloses a full-section water wetland purification system suitable for a normal water level of a river. The system comprises four parts, namely an overflow weir, a water distribution dike, a wetland for purifying water and a main flood period overflowing river. In low water seasons and the normal water level, all the water from the upstream flows through the wetland, thus the system can play a role in purifying the water; and at a flood period, the water level exceeds the overflow weir, the water flows through all sections, a narrow trapezoidal diversion port constructed in the system plays roles of water bundling and damming during the flood, the resistance is higher if the flood is greater, and more flood is compelled to flow to the wider and tendency-along flood discharge trunk river so as to reduce the flood flow of the wetland on the premise of not obstructing the flood discharge capacity and effectively protect the wetland. Moreover, according to the specific terrain of the river, structure forms of the wetland purification system can be connected in series so that the river water can be subjected to multistage purification. The construction method can be used for effectively purifying the water.

The invention discloses a buried type anti-flood wall driven by a lifting push rod. The buried type anti-flood wall comprises a water stopping plate, a lower rotary shaft and a supporting mechanism. The water stopping plate is hinged to the surface of a foundation, and the supporting mechanism is arranged on the backwater side of the water stopping plate. A ground leakage channel is formed in oneside of the upstream face of the water stopping plate, a floating ball slideway and a push rod receding area are arranged below the water stopping plate, and the floating ball slideway communicates with the ground leakage channel. The lifting push rod is fixed to the middle of a cross slide block in a penetrating mode, and a water draining pipe is arranged at the bottom of the push rod receding area or the floating ball slideway. The buried type anti-flood wall can be in a hidden state at a normal non-flood stage, and normal using of the channel is not influenced. When flood comes, after onlya small amount of flood enters a ground leakage at the early stage, the floating ball slideway can be filled with water, and under the buoyancy of floating balls, the water stopping plate is driven tobe unfolded upwards, thus the effects of flood resisting and preventing are achieved, and the buried type anti-flood wall is good in using effect and extremely suitable for being applied and popularized.

The invention relates to a once-closure and staging-closure combined dam type power plant construction diversion method and aims to reduce technical difficulty and risk, control construction flood season water level, reduce engineering cost and shorten generation period. The technical scheme includes steps of a, respectively building an entrance cofferdam and an exit cofferdam at the entrance and the exit of a diversion tunnel to be built on the first bank of a riverway; b, constructing the diversion tunnel, and excavating part of a first-stage foundation pit on the dry land on the first bank of the riverway; c, dismantling the entrance cofferdam and the exit cofferdam; d, constructing an upstream dry-season sub-cofferdam and a downstream dry-season sub-cofferdam of a once-closure riverbed on the riverway; e, constructing a longitudinal annual water-retaining cofferdam distributed along the riverway in the first-stage foundation pit close to the bank of the riverway by means of a dry season, and planning to excavate the second-stage foundation pit on the other side of the longitudinal annular water-retaining cofferdam; f, constructing behind-dam power generation plant in the dry season and the flood period in the first-stage foundation pit, and constructing a dam flood-discharge section in the second-stage foundation pit in the dry season.

The invention discloses a backwash combination type farmland non-point source pollution cut-off purification system. Emergent aquatic plants and algae are arranged in gradient by virtue of structures such as guide downflow weir, backwash vertical filler, ecological settling pit which are constructed by using a part of canal (creek) beds, so that a physical-plant-microorganism ternary stereo purification system is formed, the hydraulic power condition in the canal (creek) can be greatly improved, the hydraulic power staying time can be prolonged, and the farmland non-point source pollutant can be effectively blocked and settled and finally decomposed and purified in the ecological settling pit in the synergic action of organisms; the backwash vertical filler is reversely placed regularly to automatically remove clogging, and the blocking effect can be in effect continuously, so that manual management operation can be reduced; and the purification system does not influence flood discharge of the canals (creeks) under a condition of heavy rain run-off or flood stage. The cut-off purification systems can be used in a mode of serial connection according to particular terrain and topography, so that the water body can be purified in multiple stages.

The invention provides a ecological river comprising an old river course and a new river course. The ecological river is characterized in that one end of the old river course is provided with a riverloop starting point, while the other end is provided with a river loop endpoint; both ends of the new river course are respectively connected with the river loop starting point and the river loop endpoint; the old river course and the new river course are respectively provided with an old river gate and a new river gate on the river loop starting point; a plurality of repair units are disposed onthe old river course; submerged plants are arranged between the repair units; a deep pool with the submerged plants inside is arranged in the center of the new river course; emergent plants are arranged around the deep pool. The ecological river and treatment method thereof have the advantages that with the old river course retained after the transformation of cutting and straightening the river,staging deployment of upstream water is implemented through the control of the two gates; flood drainage problem can be effectively solved when the new river gate is opened during the flood season; the original habitat of the river and the self purification capacity of the water body are maintained in the non-flood period as the upstream water mainly passes through the old river.

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 discloses a siltation-preventing water intake facility achieving automatic flood prevention and pollution discharge. The siltation-preventing water intake facility comprises a sand flushing slope, an overflow dam, a water collection groove and a setting basin. The sand flushing slope is arranged between connected mountains. A flood-preventing dam is arranged on the left side of the sand flushing slope, the overflow dam is arranged on the right side of the sand flushing slope, a sand turning nozzle is arranged between the sand flushing slope and the flood-preventing dam, the water collection groove is formed in the sand flushing slope in the water flow direction and matched with the sand flushing slope in a bearing mode, an overflow slope is arranged in the direction, parallel to the sand flushing slope, of the water collection groove, the right side of the water collection groove is provided with the overflow dam, the left side of the water collection groove is led to a residue filter bed, the residue filter bed is provided with an overflow groove in the water flow direction and matched with the overflow groove in a bearing mode, a water stop dam is arranged at the front end of the overflow groove, the overflow groove is connected with the setting basin, and the setting basin is provided with a water intake gate and a sand discharge gate. The water intake problems of a mountain river hydropower station, a tap water plant and farm irrigation are fundamentally solved, and the purposes that siltation and blockage are never caused on a water intake dam in the flood period, and natural water intake is achieved in the drought period are achieved.

The invention provides a flood staging time determination method. The flood staging time determination method comprises the steps of flood peak scatter diagram plotting, flood peak scatter upper and lower outsourcing line drawing, upper and lower outsourcing line overlapping section or minimum distance section determination and flood staging time calculation. According to the method, the distribution, magnitude and conversion point conditions of the flood peak occurrence time can be fully considered, and the flood time segmentation point determination accuracy is improved; according to the method, the flood stages can be obtained through calculation, and subjective randomness of time point determination of a conventional analysis method is avoided.

The invention discloses a water taking system for a shallow water river in a water-depleted mountainous area. The system involves an overflow weir, a water taking chamber and a radiation well, whereina spillway grid is arranged at an inlet of the water taking chamber, a floating mushroom head automatic water taking device and an on-line turbidity meter are arranged in the water taking chamber, and a submersible pump is arranged in the radiation well. When flooding does not occur, the overflow weir lifts the water level of the shallow water river, river water flows into the water taking chamber through the spillway grid, and then enters a water conveying pipe from the floating mushroom head automatic water taking device to flow to the radiation well, and finally, the submersible pump conveys the river water to a subsequent water purifying structure; a drought period relies on joint recharge of the above mentioned surface water recharge mode and the seepage of the radiation well; when the on-line turbidity meter in the water taking chamber during a flood period is displayed higher than 5 NTU, the on-line turbidity meter feeds back a signal to a self-control system, an electric butterfly valve mounted on the water conveying pipe is closed, and the radiation well supplies water through the self-seepage; according to the water taking system, the water supply amount of the shallow water river in the water-depleted mountainous area can be ensured, the water quality is reliable, the service life of the water taking system is prolonged, and the water taking cost is reduced.

The invention provides a floating anti-flood wall. The floating anti-flood wall comprises a floating wall, a buoy, a pulley, a guide rail and a seal part. The floating wall is arranged at the top of the buoy, the pulley is arranged at the side of the buoy, the guide rail is arranged on the upstream face of an anti-flood embankment, and the seal part is arranged on the top of the upstream face of the anti-flood embankment. The floating anti-flood wall is characterized in that under the action of the buoy, the floating wall can rise along with rise of the water level or lower along with fall of the water level. The floating anti-flood wall has the advantages that the top of the floating wall can lower below the top of the anti-flood embankment during non-flood-prevention period, does not affect continuity of landscape vision of people and greatly improves quality of urban landscape; during the flood prevention period, the floating wall rises along with rise of the water level to block flood at one side of the floating wall to achieve the purpose of flood prevention. The contradiction between urban landscape and urban floor prevention is buffered.

The invention provides a grass slope water entry type ecological bank protection structure for a mountain river channel. The grass slope water entry type ecological bank protection structure comprises geotechnical cloth, a wet season bank protection mechanism, a dry season bank protection mechanism, a flood season bank protection area, a protection foot, a protection mechanism, a supporting plate and a fixing plate. According to the hydrological characteristic that the water level amplitude of a river channel in a mountainous area is large, a wet season revetment mechanism, a dry season revetment mechanism and a flood season revetment area are arranged, the revetment structure is partitioned according to different water levels, corresponding protection structures and planting structures are designed according to different partitions, aquatic, hygrophilous and shore plant communities are planted in a matched mode, and therefore the water level of the river channel in the mountainous area is changed. A novel ecological revetment capable of resisting scour, rapidly recovering a multi-layer plant community and recovering multiple natural attributes of a river channel is constructed, a protection mechanism is arranged, and the protection mechanism can be used for blocking and temporarily supporting people falling into water, assisting the people falling into water to emerge from the water surface and blocking and supporting the people falling into water, so that the safety of the people falling into water is improved. Therefore, the safety of personnel is ensured, and the drowning probability is reduced.

The invention relates to a flood drainage method for the construction period and the operation period of a channel type waste slag field, and belongs to the field of water conservancy and hydropower engineering. Before slag stacking, a drainage blind ditch is built at the bottom of the slag field; in the slag stacking period, a temporary flood drainage channel is reserved on the slag face, close to the hillside, of one side of the slag field, the upstream flood of the slag field is intensively drained to the downstream of the slag field, after the slag face is filled with a certain height, the temporary flood drainage channel is backfilled in the non-flood period, a temporary flood drainage channel of the filled slag face is reserved, it is guaranteed that a new flood drainage channel is formed in the slag stacking body in the next flood period, and the steps are repeated till slag discarding is finished; and after slag stacking is completed, a permanent flood drainage channel is built at the top of the slag field close to the mountain. The method has the advantages that the flood drainage channel is built on the slag surface, the construction is safer, simpler and faster, and the cost is low; a flood drainage channel is built on the slag surface, disturbance to hillsides on the two sides is reduced, and water and soil loss can be reduced; and the flood drainage channel is built on the slag surface, and land acquisition for building the flood drainage channel on the hillsides on the two sides is reduced.

A remote sensing-based dynamic estimation method for the outflow process of an ungauged free overflow reservoir comprising the following steps: estimating the storage volumes of the water reservoir at different water levels from the water level-area relation curve of the water reservoir by using a digital elevation model, and thereby establishing an area-storage volume relation curve of the water reservoir; obtaining the storage volumes of the water reservoir at the corresponding times; obtaining the change of the storage volume of the water reservoir through accumulative calculation on the change of the storage volume in the time periods corresponding to the two remote sensing images; gradually approximating an outflow coefficient of the water reservoir by using a bisection method; taking the final approximation result as the outflow coefficient of the ungauged reservoir, and calculating the outflow process of the water reservoir during floods.

The invention relates to the technical field of dam flood control, and discloses a folding plate structure for dam protection during a flood period, the folding plate structure comprises a water baffle assembly and a group of triangular support frames arranged in parallel, and the front ends of the group of triangular support frames are jointly connected with a group of folding frames; the rear ends of one set of triangular support frames are jointly connected with one set of upper reinforcing rod assemblies, and the lower ends of one set of triangular supporting frames are jointly connected with one set of lower reinforcing rod assemblies. The water baffle assembly, the triangular supporting frames, the folding frames, the upper reinforcing rod assemblies and the lower reinforcing rod assemblies are all convenient to fold and store, so that installation on a construction site is facilitated, the folding plate structure is light and small in occupied area, the angle of the triangular supporting frame can be adjusted, practicability is high, the folding plate structure can be repeatedly used, the strength is high, and deformation is not prone to occurring. The triangular supporting frame can be firmly fixed through fasteners, and the triangular supporting frame can be used for flood prevention or isolation of polluted soil and is suitable for places lacking soil materials and sand bags.

The invention discloses a flood drainage flow determination method of a flood drainage pump station. The method comprises the following steps: step 1, determining a flow process boundary of the upstream of a waterlogging area in a flood period and a water level process boundary of the downstream of the waterlogging area in the flood period; step 2, determining the initial adjustment water level value of the waterlogging area; calculating channel excess flow corresponding to different inland river water levels in the waterlogging area; 3, a plurality of drainage flow values are selected, and an inland river water level-inland river volume relation curve under different pump drainage flows is obtained through calculation; 4, the highest inland river water level corresponding to each drainage flow value is obtained; and 5, comprehensively considering, selecting an optimal scheme, and taking the pump drainage flow in the scheme as the drainage flow value of the drainage pump station. The invention provides an efficient and simple pump station scale design method, and the method can avoid the phenomena that waterlogging occurs in an upstream waterlogging area and a waterlogging drainage pump station at the downstream of the waterlogging area cannot run at full load in a pump station design stage.