187 results about "Discharge" patented technology

The invention discloses a pollutant total amount control method based on control section water quality standard reaching. The pollutant total amount control method comprises the steps of carrying outdata collection, field investigation and monitoring; investigating and analyzing the pollution source current situation and the water environment quality current situation of the research area, and identifying a main pollution source and a main standard exceeding factor; constructing a nested river network hydrodynamic mathematical model and a water quality mathematical model; calibration is carried out according to the water quantity and water quality synchronous monitoring data; according to the pollution source investigation result and the model calibration result, calculating an allowabledischarge amount; providing a water quality improvement scheme. According to the method, a nested regional hydrodynamic water quality mathematical model is established by dividing a research region range and a calculation unit, the allowable discharge calculation research of the region is developed on the basis, and a water quality improvement scheme is provided, so that technical support and theoretical reference basis are provided for pollutant reduction and environmental improvement schemes.

The invention relates to a tracing method for river sudden water pollution events. The tracing river is abstracted into a two-dimensional river channel; assuming that the shape of the two-dimensionalriver channel is regular, according to the technical scheme, data such as the degradation coefficient of river pollutants, the average speed of transverse and longitudinal water flow and the transverse and longitudinal diffusion coefficients of the pollutants in a water body are fully considered; diffusion simulation of pollutant emission is carried out on an appointed river area; calculation isconducted according to an observation value obtained through fixed-point monitoring and a calculation value in actual diffusion, quantitative solution is conducted on the number, the discharge position and the discharge intensity of pollutant source points through the harmony search algorithm fused with the local search, and finally the tracing method for the river sudden water pollution event isdetermined. The method has the characteristics of openness, flexibility, low calculation complexity and the like.

The invention relates to a method for testing pressure of a pipe, and in particular relates to a method for testing pressure of a large-diameter extra-long PE pipe. The method comprises the following steps of: pre-testing the pressure, which is to fill the pipe with water and dip the pipe in water for above 12 hours before testing the pressure of the pipe, later discharge the air in the empty pipe; slowly pressurizing the water pressure of the pipe to the test pressure, and stabilizing the pressure for at least 30min; mainly testing the pressure, which is to quickly discharge the water in the pipe after the step of pre-testing the pressure so as to reduce the pressure, wherein the pressure drop quantity is 10%-15% of the test pressure; calculating the discharged water quantity during the pressure discharge period while reducing the pressure; recording the rest pressure of the pipe once 3min, wherein when the rest pressure of the pipe has rising trend in 30min, the water pressure test result is qualified; or when the rest pressure of the pipe does not have rising trend in 30min, continuously observing for at least 60min, wherein when the pressure drop does not exceed 1 / 30 of the test pressure in the 60min, the water pressure test result is qualified. Compared with the prior art, the method disclosed by the invention reduces the construction time and reduces the consumption of manpower and material resources.

The invention relates to a method for depression-angle negative-pressure exploration and discharge of accumulated water in a goaf area of a mine. The method can solve the technical problems of poor safe controllability and the presence of safety risk of conventional exploration and discharge of the accumulated water in the goaf area. The method includes the following steps that S100, the working condition is surveyed and measured; S200, the accumulated water amount in the goaf area is estimated; S300, a plan for exploration and discharge of the water is made; S400, drainage boreholes are constructed; and S500, a pumping scheme is selected to pump the water. According to the method for depression-angle negative-pressure exploration and discharge of the accumulated water in the goaf area ofthe mine, depression-angle drilling is conducted in advance in the roadway, the accumulated water in the surrounding goaf area below the roadway is explored and discharged in advance, the roadway is located on the upper part of a water body in the goaf area, thus the water exploration and discharge process is absolutely safe, the water discharge work can be conducted in advance, the impact on roadway driving is reduced, the water discharge process does not rely entirely on water pressure differential artesian flow, but the water is pumped in the negative-pressure state through an air pressingdevice, and thus the safe reliability and controllability of the water exploration and discharge process is higher.

The invention relates to a tailing pond flood regulation method for downstream protection based on a tabu search optimization algorithm, and belongs to the field of tailing pond engineering. Accordingto the method, for tailings ponds in regions without data, flood regulation calculation precision can be remarkably improved through design surface rainstorm time history distribution obtained by combining a local isorainfall chart and a local rainstorm flood checking calculation practical manual; according to the tabu search optimization algorithm, the convergence speed can be increased in cooperation with specific parameters, a local optimal value is avoided, and therefore the discharge flow process line obtained through the method is more accurate; in conclusion, the problem that a traditional method is insufficient in downstream protection consideration is effectively solved, and a downstream protection object of the tailings pond can be more effectively protected.

The invention provides a virtual reservoir capacity correction-based reservoir capacity erosion and deposition simulation method for a sand-rich reservoir, and the method comprises the following steps: acquiring river cross section information and topographic information of a sand-rich reservoir area, and constructing a trunk and branch topological relation; carrying out initial virtual reservoircapacity correction on the main stream reservoir capacity and the branch stream with the measurement section according to the topographic method reservoir capacity and the section method reservoir capacity based on the main stream and branch stream topological relation, and carrying out initial virtual reservoir capacity correction on the branch stream and the furrow without the measurement section according to the topographic method reservoir capacity and section method reservoir capacity difference value; according to the ratio of the reservoir-out sand amount to the reservoir-in sand amountof the reservoir area of the sand-rich reservoir, calculating the sediment discharge ratio of the sand-rich reservoir; calculating the corresponding reservoir capacity change caused by the erosion and deposition change according to the sediment discharge ratio, and calculating the corresponding total erosion and deposition amount of the virtual reservoir; and distributing the corrected initial virtual reservoir capacity based on the total amount of erosion and deposition of the virtual reservoir and based on sludge distribution of different elevation levels of the main stream.

The invention relates to a separating device for separating fluids (18) from solids (31), in particular for the separation of fluids (18) from material previously isolated from a solid-fluid mixture (33), comprising:-a screw transport device (1), provided with a housing (2), a shaft (4) and a conveying helix (3), a compacting zone (15) wherein the solid conveyed by the screw transport device (1) is compressed to express the fluid, a sieve area (16), in particular on the compacting zone (15) and a solids discharge section (7) where the expressed solids are led away from the rotating axis of the screw transport device (1). According to the invention, the drainage effect may be improved, whereby a counter transport device (9) is provided for the transport of solids in a direction (10), opposed to at least one direction component of the transport device (8) on the screw transport (1), in such a way that solids in the compacting zone (15) and / or in the solids discharge section (7) are put under pressure by the counter transporting (10), in order to increase the expression force for the expression of fluids and the discharge force (P) for the discharge of expressed solids from the separating device. According to the invention, the drainage effect may be alternatively, or additionally improved, whereby the sieve surface (16) is formed at least partly on the shaft (4). Further, a preferred application of the above separating device in a mechanical effluent treatment is disclosed.

The invention discloses a small and medium-sized river reach assimilative capacity accounting method considering the influence of the position of a sewage draining exit. The method comprises the following steps: carrying out generalized mapping on calculated small and medium-sized river reaches; according to the generalization graph and pollutant discharge data, determining and calculating the length of the river reach, the distance from a drain outlet to the tail end of the river reach, the sewage discharge flow and the pollutant load capacity of the drain outlet; determining the flow and the average flow velocity of the initial section; according to the empirical pollutant degradation coefficient or empirical formula of the river, determining the attenuation coefficient of the pollutant; determining the pollutant concentration and the water quality target concentration of the initial section; selecting a river reach residual pollutant capacity calculation formula according to the actual condition, and calculating the residual pollutant capacity; and calculating the assimilative capacity of the river reach. According to the method, a traditional assimilative capacity calculation model which neglects the sewage discharge flow and does not consider the influence of the sewage discharge outlet position is improved, and the obtained calculation result of the ecological flow and the assimilative capacity for maintaining the river reach water environment quality has higher precision.

The invention discloses a cascade reservoir short-term optimization scheduling method and system coupled with riverway hydrodynamic processes and belongs to the field of reservoir power generation scheduling in reservoir scheduling. The method comprises the steps that: S1, a one-dimensional hydrodynamic process calculation method is used for describing the hydraulic connection of a cascade reservoir, the maximum power generation capacity of a cascade hydropower station serves as an objective function, and a cascade reservoir short-term optimal scheduling coupling model based on hydrodynamic reservoir inflow evolution is constructed; and S2, for the hydraulic connection, the coupling model is solved by using a DPSA-POA algorithm, so that the optimal scheduling result of the cascade reservoir can be obtained, wherein the scheduling result comprises a dam upstream water level process, a reservoir discharge flow process and an output process. According to the method, the waterpower relationship of the cascade reservoir is described by using the riverway one-dimensional hydrodynamic process calculation method, so that the aftereffect influence of water flow hysteresis can be eliminated,the reservoir inflow process of the downstream reservoir can be calculated more accurately; and therefore, a reservoir water level result obtained by optimization is more reasonable, and cascade water energy utilization efficiency is improved.

The invention relates to the technical field of geological environment monitoring, and discloses a contaminated site water and soil environment multi-factor one-stop management system, which comprisesthe following steps: S1, collecting data; s2, performing remote sensing interpretation; s3, performing field investigation and field test; s4, establishing a model; and S5, performing visual system integration. In S1 data collection, hydrogeological structures, underground water flow field characteristics, land utilization and surface water system distribution, pollutant discharge disposal and water and soil test data directly related to the water and soil environment of a polluted site are adopted. According to the invention, pollution indexes, distribution rules and pollution sources in surface water, underground water and soil are found out, and underground water quality pollution evaluation, antifouling property evaluation and pollution prevention and control division are completed. The invention analyzes historical pollution source distribution by utilizing remote sensing, and analyzes a water and soil pollution generation and development process; the geophysical prospecting technology is innovatively applied to describe soil and underground water pollution, and investigation efficiency is improved; and aquifer management and reasonable development are facilitated.

The invention discloses a calculation method and application of river blocking by debris flow and belongs to the technical field of debris flow control engineering. The method includes the steps that a confluent angle theta between tributaries and a mainstream is measured; an average width B1 of the mainstream at the confluent with the tributaries is measured, a flow rate Qm of the mainstream is measured, and a discharge Q1 per unit width of the mainstream is determined; an average width B2 of the tributaries at the confluent with the mainstream is measured, and a flow rate Q of debris flow is measured, and a discharge Q2 per unit width of the tributaries is determined, a discharge ratio epsilon per unit width of the tributaries and the mainstream is determined, the depth h of the mainstream at the confluent with the tributaries is measured, a volume factor yt is determined, a yield stress T1 of debris flow is determined, a density Rho of debris flow is determined, and the yield stress factor x of debris flow is determined. The possibility of river blocking by debris flow can be judged according to the value of factory. The calculating model of river blocking by debris flow has the advantages of dimensional homogeneity, high accuracy in calculation and excellent universality. By means of the calculation method and application, river blocking by debris flow can be accurately judged and debris flow control efficiency can be improved.

A method for regulating and controlling discharge flow of a dammed lake includes steps of: (S1) estimating a most dangerous discharge condition; (S2) based on the most dangerous discharge condition, calculating a structural internal force of the steel flexible net; (S3) based on the internal force of the steel flexible net, calculating an anti-slide embedded depth at two sides of the steel flexible net; (S4) based on the most dangerous discharge condition, manually excavating a channel; and (S5) based on the anti-slide embedded depth at the two sides of the steel flexible net, embedding the steel flexible net into a barrier dam. According to the present invention, the steel flexible net is laid on the upstream slope of the barrier dam, two sides of the steel flexible net is embedded into the slope body with gravels of the barrier dam, and cooperates with the channel for usage.

The invention which relates to an analogue device for researches on water-deposit interface heavy metal release and form change under high water level conditions belongs to the fields of the environmental science and the environmental engineering. The device can be applied to the construction and deposit pollution after pollution discharge, of reservoirs in northern China, and the device is used for the researches on the influences of the change physical and chemical conditions (DO, ORP and pH) on the deposit-water interface heavy metal release and forms of heavy metals in the deposit under the high water level conditions. The heavy metal release risk under waterlogged conditions can be realized. The change of the forms of the heavy metals in the deposit after pollution under the waterlogged conditions, and influence factors thereof are further analyzed and researched, so influences caused by the basin deposit quality change and the hydrological condition change are subjected to accurate and continuous online monitoring.

The invention provides a monthly runoff prediction method based on a hydrothermal coupling balance principle, and belongs to the technical field of hydrological prediction. The method comprises the steps of generalizing the water storage space in the monthly-scale watershed hydrological cycle process into a soil water tank and an underground water tank under the natural condition; calculating themonthly-scale direct runoff of the soil water tank and the base flow of the underground water tank of a drainage basin; and adding the direct runoff of the soil water tank and the base flow of the underground water tank to obtain monthly runoff depth of the drainage basin, and obtaining monthly average flow volume of the drainage basin through unit conversion. According to the invention, a hydrothermal coupling balance principle is used as a basis, on the basis of analyzing a monthly-scale watershed hydrological cycle process mechanism, a proper hydrological cycle process description structureis selected, key processes and influence factors of a monthly-scale basin hydrological cycle process are grasped, a generalization method is adopted to express nonlinear relationships among monthly-scale hydrological processes, and nonlinear storage and discharge relationships between the soil and underground water storage structures are fully considered, so that monthly runoff prediction can beaccurately and effectively carried out.

The invention discloses a sediment particle three-dimensional simulation motion monitoring experiment device which comprises a water tank for generating water flow, a stocker for storing a plurality of simulation sediment particles is arranged at the water tank, and after a discharge port of the stocker is opened, the simulation sediment particles are released into water. The simulated sediment particles are provided with sensor devices for acquiring three-axis direction stress and motion trail data of the simulated sediment particles, and the simulated sediment particles are also provided with wireless devices for sending data to a computer terminal. The tail end of the water tank is further provided with a measuring device for measuring the transport rate of the simulated sediment particles, and the measuring device is in signal connection with a computer terminal. The device can accurately simulate the entrainment and collision of sediment particles in water flow and analyze the motion trail process. Meanwhile, the simulated sediment particles are collected at the tail end of the water tank, the real-time sediment transport rate of the simulated sediment particles is measured, and new insights and understanding are provided for the water flow sediment carrying motion mechanism.

The invention discloses a support vector regression-based stratified reservoir water intake discharge water temperature prediction model and prediction method, and the method comprises the steps: firstly carrying out principal component analysis of the reservoir water temperature, the reservoir water level, the stoplog gate elevation, the reservoir flow, the outflow flow, the air temperature, the temperature chain vertical water temperature distribution, and the like; and taking the principal component with the total contribution rate greater than 99% as an input feature vector, and predicting the discharged water temperature through the trained support vector regression model. The influence of the reservoir water temperature, the reservoir water temperature distribution, the reservoir flow, the outflow flow, the reservoir water level, the air temperature and the stoplog gate elevation on the discharged water temperature and the interaction of all the influence factors are comprehensively considered, dimensionality reduction is conducted on data, and accurate prediction of the discharged water temperature is achieved on the basis of the support vector regression method. The invention is not limited by regions, can be carried out in the aspects of reservoir water temperature management, reservoir downstream ecological environment protection and the like, provides technical support for a reservoir operation scheduling scheme, can also carry out visual operation, and has a relatively good application prospect.

The invention relates to the prevention and control technical field of urban water-logging and particularly relates to a method for calculating the rainwater design discharge based on a rational formula in the constant and non-uniform flow condition. According to the invention, based on known design conditions, such as the water-collecting area F of a drain pipe, the length dL of a pipe section, the roughness coefficient n, the comprehensive runoff coefficient Psi, the pertinent parameters of the design rainstorm intensity q, the ground water catchment time t1, the pipe bottom gradient j, the section downstream-end gross head Z lower limit, the upstream-end allowable gross head Z upper limit, the preliminarily proposed diameter D of the drain pipe and the like, the rainwater design discharge Qs, the upstream-end allowable gross head Z upper limit and the diameter D of the drain pipe can be quickly determined through the iterative flow velocity V method.

The invention relates to a hydraulic engineering facility, discloses a hydrodynamic linkage scouring and desilting facility, and belongs to the technical field of hydraulic engineering. According to the facility, on a sediment basin, through some technical engineering measures, a mixed body capable of pushing silt sediment at the bottom of the side edge of the sediment basin by utilizing the cluster jet flow formed by a water tank 1 and an orifice 2 of a semi-U-shaped side wall, and pulling the silt sediment at the middle bottom of the sediment basin by utilizing the vortex flow formed by an orifice 3 of a top cover plate of a full-U-shaped groove sediment discharge pipeline is formed, a water-sand mixture is conveyed by utilizing the rotary cutting water flow formed by a full U-shaped sediment discharge gallery 4 arranged in the middle of the sediment basin, and finally the sludge-sediment mixture in the sediment basin is discharged under the action of the siphon water flow of a sediment discharge pipe 5 controlled by a gate valve. The silt sediment in the sediment basin is removed by utilizing a series of hydrodynamic linkage effects of water pushing, vortex pulling, spiral conveying, siphoning and the like. The hydrodynamic linkage scouring and desilting facility can also be applied to the technical transformation of other water conservancy projects needing scouring and desilting facilities, and is a water conservancy project facility with novelty, creativity and practicability.

The invention provides a water level prediction method based on a convolutional neural network, and the method comprises the steps: carrying out the standardization of a to-be-predicted target hydrological parameter after obtaining the to-be-predicted target hydrological parameter, and predicting a water level value corresponding to the target hydrological parameter in a specified time period after a current time period according to the output of the convolutional neural network. By combining one or more of the rising water level, the upstream water level, the downstream water level, the upstream reservoir discharge capacity and the interval precipitation capacity and utilizing the powerful feature extraction capacity of the convolutional neural network, the limitation of a traditional water level prediction method is broken through, the precision of water level prediction is greatly improved, the reliability is high, and the method has a wide application range.

The invention discloses a generalized calculation method for a pipe network drainage process of an urban area without pipe network data. The generalized calculation method specifically comprises the following steps that the number of blocks of a researched area, the number of catch basins of each block, the distribution positions of the catch basins and the circumferences of the catch basins are measured through actual reconnaissance; the surface water depth of the whole research area by adopting a flood process numerical method is calculated based on an all-hydrodynamic method; the amount ofwater entering the single rainwater well is preliminarily calculated from the earth surface through a weir flow formula, namely the discharge amount of the single rainwater well; the total drainage amount of the rainwater well to which the same block belongs is calculated; according to the pipe diameter and the gradient of the drainage pipeline, the total drainage amount of the same block is limited and corrected, and the corrected drainage amount of a single rainwater well is obtained; all rainwater well drainage amounts of K blocks of the researched area are calculated; and the net rain rateRn of a single rainwater well is calculated on the earth surface unit at the position of the rainwater well. According to the invention, the simulation precision of the urban flood process without pipe network data can be improved.

The invention relates to a method for tracing sudden heavy metal water pollution. The method comprises the following steps: firstly, obtaining a primary selection list of a pollution source through an existing enterprise troubleshooting list database; meanwhile, selecting a proper hydrodynamic equation for simulation according to the characteristics of the heavy metal pollutants, and acquiring a hydrodynamic simulation database by simulation according to hydrological information and pollutant information of the automatic monitoring station, through a space-time traceability model, carrying out traceability solving by an artificial fish swarm algorithm, and the discharge position and discharge time of an output pollution source; and then through a pollutant discharge amount model, carrying out traceability solving through an improved artificial fish swarm algorithm to output pollutant discharge quality, and through output results of the two models, optimizing the primary selection list to obtain an optimized list; and finally, acquiring a checking list by probability calculation. The effectiveness of the method is verified through related experiments. According to the invention, the position, the discharge time and the total discharge amount of the pollution source can be obtained more quickly and accurately.

The invention provides a method for determining flood control high water level of a sandy river reservoir based on a high-beach high tank. The method comprises the following steps: collecting hydrological data related to design calculation preparation; judging whether the target river belongs to a sandy river or not according to the collected hydrological data; if yes, designing and calculating the high-beach high-groove form corresponding to sediment deposition at the bottom of the reservoir, and the high-beach high-groove form comprises a longitudinal section form and a cross section form; the determining flood control reservoir capacity of the reservoir according to the reservoir design flood process line and the discharge flow process line; calculating the reservoir capacity of the reservoir based on the designed and calculated high-beach and high-trough form; drawing a water level reservoir capacity curve according to the calculated reservoir capacity; and determining the water level corresponding to the flood control reservoir capacity as the flood control high water level according to the water level reservoir capacity curve. According to the technical scheme, the flood control high water level can be conveniently determined according to the reservoir sediment deposition state, namely the high-beach high-trough form.

The invention discloses a judging method for vertical shaft drilling process dynamic regulation on the basis of slag material analysis. The method comprises the following steps of: according to the geological condition provided through geological exploration, using a raise boring machine for performing guide hole drilling from top to bottom; regularly fishing drilled rock slag; primarily judging the vertical shaft lithologic conditions of different depth sections through the sampling and analysis on the fished rock slag; comparing the judging result with the geological condition provided through geological exploration; selecting process parameters for reaming drilling in different depth sections according to the judged vertical shaft lithologic conditions of different depth sections; after a guide hole is drilled through, changing a raise boring machine drill bit; and performing reaming from bottom to top according to the selected drilling process parameters. In the reaming process, through the analysis on the ingredients of slag materials and the comparison analysis on the actual slag discharge quantity and the normal calculation quantity, the judging reliability on the actual geological condition is improved, so that the process parameters such as the torque, the thrust and the rotating speed during drilling can be dynamically regulated in time; and the production efficiency is improved.

The invention provides a tailing pond dam break risk estimation and emergency response method and device and electronic equipment, and relates to the technical field of tailing pond dam break emergency response, and the method comprises the steps: building an erodible dam overtopping burst model based on initial dam break influence parameters obtained in advance; calculating the discharge flow and the breach broadening after the dam break of the tailings pond based on the erodible dam overtopping burst model; determining dam break influence data of the downstream channel through a pre-established planar two-dimensional dam break flood routing model; and estimating the dam break risk according to the discharged flow, the breach broadening and the dam break influence data of the downstream channel, and determining the emergency response grade. According to the method, the accuracy of risk estimation of tailing pond dam break is improved, the safety early warning effect is further improved, and the timeliness and accuracy of emergency response are improved.

The invention discloses a method for identifying potential pollution risk sources of underground water. The method comprises the following specific steps: 1, dividing six types of potential pollutionrisk sources; 2, determining the weights of toxicity, mobility and degradability of the characteristic pollutants, and determining the harmfulness of the characteristic pollutants; 3, establishing a pollution risk source pollutant discharge amount calculation model, and comprehensively determining the harmfulness of the risk source; 4, establishing risk source occurrence condition evaluation indexgrading; 5, establishing a risk source contribution rate model, and calculating the intensity of the potential pollution risk source; and 6, grading contribution rates of various potential pollutionrisk sources. The key identification range of the potential pollution risk source in the research area can be determined; the harmfulness level of the characteristic pollutants can be recognized, andtargeted prevention and control are achieved; comprehensive evaluation of harmfulness of a pollution source is facilitated, and six types of pollution risk sources are comprehensively managed and controlled; through the risk contribution rate of each pollution source in different areas, targeted prevention and control measures and schemes are provided.

The invention discloses a water environment data analysis method, and relates to the field of environmental protection and big data analysis.The water environment data analysis method comprises a baseline determination method; a gradient line determination method; a detection point data time interpolation method; a steady state searching method; a progressively increasing transient search method; a progressively decreasing transient search method; a wave crest and wave trough transient searching method; a periodic transient search method; a space-time delay calculation method; a baseline interpolation calculation method; and a drainage basin detection index display method. According to the method, the pollutant condition of the section and the discharge condition of the sewage draining exit are monitored through the river, the numerical value of the section interval is interpolated through the interpolation algorithm, the complete pollutant distribution condition of the whole drainage basin is formed, and according to the pollutant distribution condition of the whole drainage basin, the expected value of the pollutant concentration in a period of time in the future is given through a data prediction method. Pollution distribution is given from the perspective of big data statistics, and the problem that a traditional accurate diffusion model is not suitable for complex and changeable actual situations is solved.

The invention provides an excavation face seepage test system of river bottom shield tunnel construction under a tidal load effect. The system comprises a model box and a shield tunnel model. The mainbody of the shield tunnel model is placed in the model box. Soil and water samples are filled in the model box in a layered mode. A movable panel, a telescopic straight rod and a telescopic rod installation seat form a tunnel excavation face support device. A frequency conversion water pump device can be used to simulate a tidal load above a river bottom shield tunnel in a tidal bore zone. Through setting tidal load condition combinations with different amplitudes and different frequencies, excavation face seepage discharge changes, the change of the seepage field of soil near an excavation face, the displacement change of the soil sample at each test point, and the change of the support pressure of each test point are monitored so as to study an excavation face seepage law, then optimizea shield construction parameter and guide a design and construction.

The invention discloses a reservoir group water and sediment optimal scheduling method and system considering a staging multi-objective function. The method comprises the steps that characteristic curves, characteristic water level data and power station basic data of all reservoirs of a basin are collected, constraint conditions of all reservoir scheduling processes are determined, the maximum reservoir group power generation capacity and the minimum reservoir sediment deposition amount in the basin are selected as scheduling targets, and a basin reservoir group water and sediment joint optimization scheduling model is established; processing historical runoff and sediment concentration data of the reservoir to a ten-day scale to serve as an input scene of a scheduling model; and solvingthe scheduling model by adopting a discrete differential dynamic programming method so as to obtain a reservoir group water and sediment joint optimization scheduling scheme. According to the method,multiple targets such as sediment erosion and deposition, flood prevention, ice prevention, power generation and water supply and the applicability change of the target weight coefficient in the scheduling period are considered, the sediment discharge ratio is introduced to describe the sediment erosion and deposition amount of the reservoir group, a new thought and method are provided for basin water and sediment scheduling, and the reliability of the scheduling process and the comprehensive benefits of the scheduling result can be improved.

The embodiment of the invention provides a water control coal mining method and device below a compound water body. The method includes the steps that compound water body occurrence characteristic information and coal seam mining overburden failure height predictive information are obtained so that a watery zone, a collapse and fracture safety zone and a sudden water gushing zone can be obtained according to the compound water body occurrence characteristic information and the coal seam mining overburden failure height predictive information; and a water control mining scheme is determined according to the watery zone, the collapse and fracture safety zone and the sudden water gushing zone. Through detection of water body and rock mass detection and the technology combining underwater mining with unwatering or drainage mining, combining hole drilling mining after drainage with mining while drainage, combining hole drilling unwatering or drainage with stoping unwatering or drainage andcombining overburden control with the aquifer drainage degree, the water gushing amount and the water gushing form of a working face are controlled, the man-made water guide passageway hidden danger caused by excessive water drainage and discharge is reduced, the hole drilling work amount and the water drainage expense are reduced, and safe, efficient and green mining of coal resources pressed below the compound water body is achieved.

The invention discloses an intelligent zero-discharge drainage method. The method comprises the following steps: S1, setting the maximum value H<set> / t of the water taking depth of an undisturbed settling zone of a drainage pump, S2, metering the time t when the first-stage supernatant depth H1 of water sedimentation in the tank body reaches H<set>, wherein the initial sedimentation velocity V<sedimentation> of particles in the tank body is equal to H<set> / t, S3, when the depth H1 of the supernatant reaches H<set>, starting the drainage pump, S4, setting the water outlet speed V<water> equal to V<sink>-A, wherein A is a safety value, S5, setting the flow Q1 of the drainage pump equal to V<water>*S, wherein S is the sedimentation area of the tank body, and setting Q1 during initial operation equal to (H <set> / t-A)*S, and S6, with the time t as a period, monitoring the supernatant depth of the second stage to be H2 and the particle settling velocity V<settling>2 in the second stage to beH2 / t, and repeating the steps S3 to S5, so that dynamic control is achieved, and water outflow can be intelligently controlled. The invention further provides a drainage sedimentation tank applying the intelligent zero-discharge drainage method, and the sedimentation tank is small in occupied area and high in sedimentation efficiency.