80 results about "Rainfall simulation" patented technology

The invention relates to the technical field of automatic driving vehicle testing, in particular to a rainfall adaptive simulation control method and system for automatic driving vehicle testing. The method comprises the following steps: executing an outdoor rainfall simulation process through control parameters, and collecting behavior information of an autonomous vehicle in the simulation process; constructing a target function according to the deviation between the behavior information and expected information and the control parameters; iterating the strategy parameters by adopting a reinforcement learning framework based on a strategy gradient method and taking minimization of the target function as a target to obtain optimal strategy parameters; obtaining an optimal control parameter according to the optimal strategy parameter and the current rainfall state; and under the optimal control parameters, evaluating the performance boundary of the automatic driving system in the rainfall environment according to the behavior information of the automatic driving vehicle. According to the invention, the rainfall simulation scene with high precision and strong controllability is constructed, and the performance boundary of the automatic driving system in the rainfall scene is explored.

The invention relates to a rainfall observation method and device, a computer system and a medium, and solves the problem of high-reliability observation of regional rainfall. The method comprises the following steps: firstly, adopting reanalysis data and earth system mode output data to construct a first deep learning model of satellite inversion rainfall so as to reconstruct a lattice long-series rainfall data set; then, taking the rainfall attenuation information of the historical period as input, obtaining a rainfall simulation series of the corresponding historical period through different rainfall attenuation and rainfall intensity models, determining regional rainfall under the different rainfall attenuation and rainfall intensity models through a weighted link method, and preferably selecting an optimal rainfall attenuation and rainfall intensity model through long-series lattice rainfall data of the historical period; furthermore, a second deep learning model is constructed by adopting satellite inversion data and rainfall data inverted by a rainfall attenuation and rainfall intensity model, real-time correction of regional precipitation is realized, finally, real-time rainfall information of the region is deduced by adopting the optimal rainfall attenuation and rainfall intensity model and taking a real-time mobile signal as input, and the regional average precipitation corrected in real time is obtained.

The invention provides an intelligent landslide rainfall simulation system and method based on AI historical rainfall data driving, and belongs to the technical field of geological disaster monitoring and early warning. Dynamic coupling analysis and high-precision simulation of the rainfall process and slope stability are realized through automatic fusion of multi-source monitoring data and spatial-temporal feature extraction in combination with deep learning and physical mechanism modeling. The system can sense various types of data such as rainfall, soil moisture content and slope deformation in real time, intelligently identify landslide induced risks, output graded early warning information and support digital twinborn and adaptive risk optimization decisions. The landslide disaster risk assessment and early warning accuracy and response timeliness are remarkably improved, and the method has good intelligence, expansibility and practical application value and is widely applied to the fields of geological disaster prevention and control and engineering safety monitoring.

The invention discloses a slope soil erosion prediction method, system, equipment and medium, and relates to the technical field of soil erosion, and the method comprises the following steps: taking slope soil with different grain composition as a research object, and carrying out a rainfall simulation experiment; constructing a production and construction project soil erosion prediction model according to the product of a subrainfall erosivity factor, a soil erodibility factor, a slope length factor, a slope factor and a slope surface area on the basis of the grain composition characteristic particle size; and predicting the soil erosion of the slope surface of the to-be-predicted production and construction project through the production and construction project soil erosion prediction model. According to the model disclosed by the invention, a direct quantitative relationship between the characteristic particle size and the erosion strength is established, so that an acquisition way of the soil erodibility factor is simplified, the dependence of the model on complex and expensive soil physical and chemical parameter analysis is greatly reduced, and the operability and the popularization efficiency of the model in a production field are greatly enhanced.

The invention discloses an urban flood simulation and safety evaluation method, and belongs to the technical field of hydrological data processing and flood rehearsal. The method comprises the following steps: firstly, collecting DEM data of a to-be-processed range, performing projection depression filling preprocessing through ArcGIS software, calculating a flow direction and a flow rate, extracting a river network, and constructing a catchment area and a rainfall flood model; carrying out rainfall simulation and one-dimensional hydrodynamic force calculation by using SWMM software to obtain a river channel and node time sequence flow; then, the flow data are input into HEC-RAS software, two-dimensional hydrodynamic simulation is completed in combination with the terrain, and the flood inundation range and depth are obtained; finally, repeatedly simulating rainfall in different recurrence periods, and dividing flood risk areas according to indexes such as a water depth threshold value and a flooded area. According to the method, full-process automatic processing from rainfall input to flood routing is realized, the timeliness and precision of flood rehearsal are improved, and support is provided for disaster prevention and reduction decisions.

The invention belongs to the technical field of geotechnical engineering disasters, and particularly relates to an intelligent rainfall simulation system and method for a slope stability experiment. The system comprises an intelligent rainfall simulation unit, a comprehensive monitoring unit, a real-time data fusion and adaptive control unit and a data analysis-visualization unit which are organically unified and matched with one another. According to the invention, intelligent control of the rainfall process can be realized, and the rainfall intensity, raindrop size and rainfall uniformity can be accurately adjusted; the system is high in integration level and high in automation degree, real-time multi-dimensional monitoring can be achieved, and high-precision and real-time analysis of experimental data and automatic risk early warning are achieved. Advanced monitoring means such as DIC full-field strain, optical fibers and acoustic emission are adopted, the experiment precision is remarkably improved, an accurate basis is provided for slope stability analysis and disaster prevention and control, and the method can be applied to the fields of engineering slope safety evaluation, education and public safety and has a good application prospect in the aspects of geological engineering, geotechnical engineering, colleges and scientific research and teaching, emergency drilling and science popularization and the like. And safety and disaster prevention awareness are improved.

The invention relates to a door and window safety performance detection device for constructional engineering, and belongs to the technical field of constructional engineering detection. The uniformly distributed load force application assembly can apply uniform or gradient change pressure to the whole surface of the door and window to simulate wind pressure; the concentrated load force application assembly can perform fixed-point impact on specific parts of doors and windows and simulate hard object impact or violent forcible entry; the wind pressure loading assembly applies uniform and gradient-adjustable wind pressure loads to the surfaces of doors and windows, simulates stress states under different wind levels and detects the air tightness of the doors and windows, and the rainfall simulation assembly simulates rainfall environments with different strengths to detect the water tightness of the doors and windows; the deformation of doors and windows, the stress of key parts of the doors and windows, the water leakage condition and the air leakage condition can be monitored, and the comprehensiveness and the real-time performance of detection data are ensured. The system can achieve the detection of multiple safety performance dimensions of the doors and windows of the constructional engineering, effectively improves the detection efficiency and precision, reduces the manual operation intervention, and provides a comprehensive and reliable data support for the safety performance evaluation of the doors and windows.

The invention relates to the technical field of test devices, and discloses a device for simulating a karst slope complex rock habitat, which comprises a rock surface confluence simulation assembly, a karst rock-soil composite habitat simulation assembly, a rainfall simulation assembly and a multi-path runoff separation and collection assembly. Integrated simulation of three core characteristics of'complex rock distribution ', 'rainfall' and'rock surface flow 'of the karst slope is realized in one device for the first time, and the authenticity and scientificity of indoor experiments are greatly improved. Meanwhile, due to the unique design of the reconfigurable rock module, the coverage rate, the spatial configuration, the exposure mode and other key parameters of the rock can be flexibly adjusted, various habitats from simple to complex can be simulated, and the applicable research range is wide.

The invention belongs to the technical field of clothing performance detection, and discloses a clothing waterproof performance evaluation method and device, electronic equipment and a storage medium, and the method comprises the steps: placing a clothing supporting device wearing a to-be-detected clothing and an evaluation inner shirt in a rainfall simulation device, and adjusting the rainfall parameters of the rainfall simulation device to evaluate the waterproof performance of the to-be-detected clothing; natural rainfall phenomena with different rainfall intensities are simulated, and water seepage scores of the to-be-detected clothes under the natural rainfall phenomena with the different rainfall intensities are determined according to the water seepage conditions of the evaluation underwear and the to-be-detected clothes under the natural rainfall phenomena with the different rainfall intensities. By simulating a real wearing scene and a variable rainfall environment, the water seepage score is determined according to the water seepage conditions of the evaluation underwear and the to-be-tested garment, so that the waterproof performance of the garment is evaluated, and the evaluation efficiency of the waterproof performance of the garment is improved.

The invention discloses a landslide geological slope stability testing device and a using method, and relates to the technical field of slope stability testing devices.The landslide geological slope stability testing device comprises a base, and an angle adjusting mechanism, a testing box, at least one testing unit and a rainfall simulation mechanism are arranged on the base; the angle adjusting mechanism comprises a supporting driving assembly arranged on the base and a rotating assembly connected with the testing box, the supporting driving assembly is used for driving the testing box to rotate around a transverse axis so as to adjust the transverse gradient of the testing box, the testing unit comprises a gradient adjusting assembly and a slope simulation plate, the gradient adjusting assembly is arranged in the testing box, and the slope simulation plate is arranged in the slope adjusting assembly. The output end of the gradient adjusting assembly is connected with the side slope simulation plate and used for driving the side slope simulation plate to rotate around a longitudinal axis so as to adjust the longitudinal gradient of the side slope simulation plate, the rainfall simulation mechanism is arranged on the base, located above the test unit and used for spraying water to the side slope simulation plate, the structure is simple, use is convenient, the application range is effectively widened, and the test efficiency is improved. And the research efficiency is effectively improved.

This invention relates to the field of mine geological disaster control and geotechnical engineering testing technology, and particularly to a device and method for simulating and testing the seepage and particle migration of glacial till under rainfall conditions. The device includes a rainfall simulation mechanism, a glacial till seepage simulation mechanism, a seepage monitoring system, and a migration and seepage monitoring system. The glacial till seepage simulation mechanism includes a cylinder, and the monitoring end of the seepage monitoring system is located inside the cylinder. By setting up a rainfall simulation mechanism and a cylinder, and placing the monitoring end of the seepage monitoring system inside the cylinder, this invention allows the seepage monitoring system to monitor the seepage and moisture content changes of glacial till samples at different depths in real time. The migration and seepage monitoring system collects infiltrated water and migrating fine particles, enabling researchers to determine the rainwater infiltration situation of this type of glacial till sample and the migration pattern of fine particles under infiltration conditions based on the amount of water and fine particles collected by the migration and seepage monitoring system.

The application provides a visual device for simulating rainfall scouring of a slope under earthquake conditions, comprising: a vibration table for providing a vibration signal to simulate ground motion characteristics under earthquake action; an adjusting mechanism placed on the vibration table for providing different slope angles; a model box placed on the adjusting mechanism, the model box comprising an open-top box body with transparent side walls, which carries a slope model; a rainfall simulation assembly arranged at the open end of the top of the model box for simulating a natural rainfall environment; and a data acquisition and processing unit for collecting real-time change information inside and outside the slope model during the experiment, and analyzing response rules and instability evolution processes of the slope model under rainfall and / or earthquake action according to the collected data. The device has high structural integration, perfect functions, is suitable for slope response simulation under the coupling action of earthquake and rainfall, and has good visual effect and application promotion value.

The invention discloses an instability failure simulation method for a soft and hard interbedding counter-tilt slope under a rainfall condition, and relates to the technical field of rock mechanics and rock engineering. The method comprises the following steps: constructing an FDEM numerical model of a target soft and hard interbed counter-dip slope; setting boundary conditions for the numerical model, and applying initial gravity until a stress balance state is reached; based on the numerical model of stress balance, rainfall simulation is executed; according to a rainfall simulation result, judging whether slope instability failure occurs or not; if the slope instability failure does not occur and the load increasing condition is met, executing gravity load increasing simulation until the slope instability failure occurs while the rainfall simulation is maintained; and according to the critical gravity load when the slope is unstable, determining the slope safety coefficient of the target soft and hard interbed counter-tilt slope under the rainfall condition. According to the invention, fine simulation of the whole deformation and instability process of the soft and hard interbedding counter-dip slope under the rainfall condition can be realized.

The application belongs to the field of cold region track engineering and subgrade engineering, and specifically discloses a high-speed rail ballastless track-subgrade freezing characteristic simulation test device based on meteorological conditions in cold regions, which comprises a programmable high-low temperature test box for controlling the alternating change of environmental temperature, a rainfall simulation device for adjusting according to different rainfall in cold regions, a solar radiation simulation device for adjusting according to different illumination in cold regions, a ballastless track structure composed of unit block type structure, a subgrade structure composed of three-layer structure, and a data acquisition and monitoring module for monitoring and collecting deformation displacement, temperature, moisture and radiation data in real time. Through the device, real-time monitoring of relevant parameters such as the temperature of the high-speed rail ballastless track, deformation, the temperature of the subgrade, moisture and deformation in cold regions can be realized, the freezing depth of the subgrade and the contribution of each soil layer in frost heaving deformation can be determined, and the influence of the ballastless track on the freezing characteristics of the subgrade can be further analyzed.

The application discloses a kind of slope rainfall simulation device for open-pit coal mine, it belongs to the technical field of slope protection of open-pit coal mine, the slope rainfall simulation device for open-pit coal mine includes several sequentially arranged model boxes, each model box top is equipped with opening, each model box is equipped with rainfall simulation subassembly, along the direction of sequentially arranged, any one model box of two ends is first model box, the rest several model boxes are second model box, the side wall outside of first model box far from second model box is equipped with side push subassembly, the lower side of several model boxes is equipped with base plate, the lower side of base plate is equipped with lifting assembly and fixed rotating component, and several model boxes are equipped with sensor subassembly.The application is by using lifting assembly and side push subassembly to exert different directions force to model box, to simulate the state when slope is subjected to different force;The application is by being equipped with rainfall simulation subassembly, to simulate various conditions of slope after rain, to facilitate obtaining experimental data.

This application provides an in-situ one-dimensional soil column permeability test device and method under rainfall conditions, relating to the field of soil permeability testing. The in-situ one-dimensional soil column permeability test device under rainfall conditions includes: a simulated soil mass and a rainfall simulation system. The simulated soil mass includes a test soil pile, a simulated soil column, and a moisture content sensor. The rainfall simulation system includes a stabilizing support, a simulated rain box, and an adjustment mechanism. The stabilizing support is inserted and fixed within the test soil pile and spans the test trench. The adjustment mechanism is located at the upper end of the stabilizing support. This in-situ one-dimensional soil column permeability test device under rainfall conditions allows for direct observation of permeability rate and permeability deformation, and can obtain the moisture content time-history curve during the test process to study the seepage field changes of the simulated soil column. It also effectively controls the distance between the simulated rain box and the top of the simulated soil column, reducing the impact of rainfall on the boundary of the simulated soil column.

The invention relates to the technical field of slope engineering, and discloses a soil slope partition rainfall test device, a test box comprises a box body and a slope model, the slope model comprises a plurality of rainfall simulation areas, the bottom of a rain baffle is separated from the slope model, and a rainfall spraying mechanism comprises a water conveying pipe and a pressure nozzle. The rainfall simulation area located in the non-rainfall area is covered with a waterproof film, and a waterproof film is installed at the junction between the rainfall simulation area located in the non-rainfall area and the rainfall simulation area located in the rainfall area; the invention further discloses a test method of the soil slope partition rainfall test device. Test preparation; rainfall simulation: selecting a rainfall simulation area, covering a waterproof film and installing a rainproof plate; collecting data; according to the invention, the rainfall range of each region is effectively controlled, and precise simulation of local soil saturation, shear strength reduction and local failure mechanism of the slope under the rainfall condition is realized.

The invention belongs to the field of geological disaster simulation and engineering protection, and discloses a surface collapse simulation device and method with pipeline leakage and rainfall coupling effect, and the device comprises a model box, a water circulation system, an underground water level control device and a rainfall simulation device; the model box is connected with the water circulation system, the underground water level control device and the rainfall simulation device. A leakage pipeline and a porous filter plate are arranged in the model box; the water circulation system comprises a water source pool, a water suction pump, a water supply pipeline, a sewage collection tank and a water return pipeline; the water source pool is connected with the model box through a water pump and a water supply pipeline; the model box is connected with a water source pool through a sewage collection tank and a water return pipeline; and an overflow pipe is arranged on the underground water level control device and extends into the model box. The influence of multi-field coupling effects such as pipeline leakage, underground water level and rainfall on surface collapse in the actual geological disaster occurrence process can be simulated more accurately.

The embodiment of the invention provides a flood early warning method and device based on insurance policies, electronic equipment and a medium, belongs to the technical field of data analysis, and is suitable for financial scenes. The method comprises the steps of obtaining a target underwriting drainage basin of a target insurance policy, dividing the target underwriting drainage basin into grid drainage basin units, performing unit rainfall extremum analysis according to regional historical rainfall, performing unit rainfall simulation according to historical claim settlement loss levels and unit rainfall extremum data, and performing unit rainfall simulation according to the historical claim settlement loss levels and unit rainfall extremum data. And unit flood range prediction is performed according to the unit forecast rainfall data and the flood inundation range simulation data, and flood early warning is performed based on the flood inundation range prediction data. According to the embodiment of the invention, the unit rainfall simulation is carried out according to the historical claim settlement loss level and the unit rainfall extreme value data, and the flood early warning is carried out according to the unit forecast rainfall data and the flood inundation range simulation data, so that the early warning fatigue problem caused by sending invalid flood early warning to low-risk customers is effectively avoided, and the flood early warning precision is improved.

This invention discloses a disaster early warning method and system for overseas crude oil pipeline systems, belonging to the field of pipeline safety technology. The disaster early warning method for overseas crude oil pipeline systems includes constructing an equivalent sand table model and conducting experiments based on the sand table model. By acquiring the target components and attributes of the crude oil pipeline system, an equivalent sand table model corresponding to the crude oil pipeline system is constructed. Rainfall simulation experiments are then conducted based on the equivalent sand table model, simulating rainfall events of different intensities and durations to assess the pipeline's integrity under various heavy rainfall conditions, i.e., evaluating the disaster resistance capability of the crude oil pipeline system. When the evaluation result is low, corresponding early warning information is generated. This addresses the problem of current early warning methods relying too heavily on disaster data and lacking predictability, improving the reliability and accuracy of the evaluation results.

This invention discloses a self-feeding slope splash erosion simulation device and method. The device includes a rainfall system, a test soil trough, and a control system. The device can accurately simulate different types of rainfall conditions, such as light, moderate, and heavy rain, and can generate raindrops of different sizes during rainfall to simulate the splash erosion process of raindrops on the soil surface in natural rainfall. The size of the raindrops can be adjusted and controlled according to actual needs. The proposed atomization-sublimation technique ensures the uniformity of the entire rainfall simulation and enables accurate simulation of rainfall intensity and raindrop size. The automatic lifting system of the entire model soil trough, linked with the rainfall control, further enhances the accuracy of the simulated splash erosion effect.

The application relates to the technical field of computer simulation, in particular to a two-dimensional surface calculation method of a cellular automaton, which comprises the following steps: based on terrain data acquisition and recording, terrain data of multiple regions are analyzed, elevation and slope are recorded, terrain data is processed by using a cellular automaton, a terrain model is constructed, and regional terrain information is obtained. In the application, by means of terrain data acquisition and terrain model construction, the quality of basic data of the model is improved, accurate input data is provided for simulation, key positions are identified, the size and distribution of cells are adjusted, the simulation resolution of key regions is optimized, the local precision of simulation is improved, the consumption of computing resources is reduced, parameters of rainfall simulation are adjusted according to actual meteorological data, the reliability of prediction is enhanced, soil erosion and surface runoff are simulated, the erosion effect and anti-erosion capacity of multiple regions are evaluated, and the prediction accuracy and practicability of the two-dimensional surface calculation are improved.

The invention relates to the technical field of landslide experiments, in particular to a landslide experiment device capable of simulating rainfall conditions. According to the landslide experiment device capable of simulating the rainfall condition, the rainfall condition is subjected to various simulations, so that a more sufficient rainfall experiment can be carried out on landslide, and the experiment effect is better. The landslide experiment device capable of simulating the rainfall condition comprises supporting legs, and the bottoms of the two supporting legs are each provided with an anti-skid pad; the water tank is arranged between the top ends of the two supporting legs; and the rainfall simulation mechanism is arranged on the water tank. Clear water is evenly sprayed to the hillside simulation soil blocks through the multiple spraying holes in the spraying pipe, the rainfall condition on the hillside is simulated, the hillside simulation soil blocks can have landslide after rainfall, and therefore the rainfall simulation experiment is conducted on the landslide.

This invention discloses a slope soil aggregate erosion and disintegration testing device, belonging to the field of geotechnical engineering testing technology. The device includes: a model box assembly, a rainfall simulation assembly, an optical observation assembly, and a runoff collection assembly. The model box assembly includes a box body and a slope adjustment mechanism. The slope adjustment mechanism uses multiple hinged plates in conjunction with a hydraulic drive device to achieve precise adjustment of the slope angle in segments. The uppermost layer of the filling area inside the box body is divided into several tracer zones, each tracer zone being covered with a soil layer containing different colored fluorescent tracers. The rainfall simulation assembly simulates natural rainfall processes. The optical observation assembly includes a light shield, an ultraviolet light source, a camera, and a filtering system to achieve fluorescence imaging. The runoff collection assembly uses a sampler to collect sediment samples at different time intervals. This invention can accurately track the soil loss path at different slope locations, enabling visualized observation and quantitative analysis of the soil erosion process, providing a systematic experimental method for studying soil disintegration mechanisms.

This invention provides a rainfall simulation device for hydropower station reservoir bank slope erosion testing, relating to landslide disaster testing. It includes a support base, a water spray assembly, an adjustment drive assembly, and an angle adjustment assembly. The water spray assembly includes a fixed frame and a main water tank mounted on the fixed frame. A fixed ring is rotatably connected to the lower end of the fixed frame, allowing the frame to rotate around a horizontal axis. The fixed ring is rotatably connected to the support base, allowing it to rotate around a vertical axis. The adjustment drive assembly includes a first motor, a pitching mechanism, and a rotating mechanism. The angle adjustment assembly drives the main water tank to swing. The beneficial effects of this invention are: it can more closely approximate the effect of real rainfall, reducing the deviation between simulated rainfall and the characteristics of real natural rainfall, restoring the simulation of the slope erosion effect caused by real rainfall, and providing reliable experimental data support for the erosion protection design of reservoir bank slopes.

The utility model relates to the technical field of rainfall simulation, and provides a rainfall simulation device for a side slope washout test, which comprises a base, a panel groove used for filling filler to form a simulated side slope is hinged on the base, a first telescopic cylinder for driving the panel groove to rotate is hinged on the base, a mounting plate is arranged on one side of the panel groove, and a second telescopic cylinder is arranged on the other side of the panel groove. A second telescopic cylinder for driving the mounting plate to move up and down is arranged on the base, a water spraying assembly and a driving mechanism for driving the water spraying assembly to rotate at multiple angles are hinged to the mounting plate, a fan located on the side, away from the panel groove, of the second telescopic cylinder is arranged on the base, and a water tank is arranged on the base; a booster pump used for pumping water in the water tank into the water spraying assembly is arranged on the water tank, an L-shaped fixing plate is fixedly connected to the upper side face of the mounting plate, and by means of the technical scheme, the problem that in the prior art, the water spraying position of a nozzle cannot be adjusted when raining is simulated on a ramp is solved.

The invention discloses a multi-physics-field coupling vibration table test system and an operation method, and relates to the technical field of multi-physics-field seismic simulation tests. The test system comprises a temperature control system, a heat insulation test model box, a rainfall simulation system, a load simulation system, a waterproof heat preservation layer and rainfall system auxiliary equipment, multi-physical field coupling working conditions of a temperature field, a moisture field and a stress field are considered, and simulation of disaster working conditions such as earthquakes, rainfall, train loads and freezing and thawing cycles can be achieved; according to the test system, the disaster development sequence can be flexibly adjusted according to test requirements, sequential action or simultaneous action of multiple physical field disasters can be realized, and the system is reasonable in arrangement; the test system is small in occupied area, detachable, easy to carry and high in implementability, the test difficulty can be greatly reduced, and the test efficiency can be greatly improved; the test system considers long-term operation guarantee and is provided with waterproof thermal insulation equipment, so that long-term stable operation of various devices of the system is guaranteed.

The invention discloses a tailing pond underlying surface runoff and confluence simulation and real-time monitoring analysis system, which is characterized in that a special underlying surface environment of a tailing pond is accurately reproduced by constructing a multi-gradient contrast experiment unit, an artificial rainfall simulation unit and a runoff quality-based collection unit; a soil humidity, liquid level, rainfall and surface flow state multi-source sensing network is integrated, and the whole process of production and confluence is sensed synchronously; on the basis of an intelligent data processing platform, monitoring data are fused in real time, and a runoff generation rule is dynamically analyzed. The technical problem that a traditional method cannot give consideration to multi-factor control, whole-process monitoring and real-time analysis is solved, and a complete experimental research platform is provided for revealing the non-linear production and confluence mechanism of the tailings pond and flood risk early warning.

The invention discloses a device for simulating different drought environments to start debris flow and an air resistance monitoring method, and belongs to the technical field of geological disaster simulation tests. The three sets of parallel variable gradient test boxes are connected in parallel and converged into the main circulation channel, so that visual and quantitative research on the debris flow starting and migration process under different drought environments and surface salinity conditions is realized. The device is provided with an intensity-controllable fan-shaped atomization rainfall simulation system, a temperature simulation system, a capillary water supply and salt migration system, a wireless landfill type pressure sensing array and a multi-channel water collection system, and a special moisture field with a wet lower part and a dry upper part and an air resistance effect of an arid river valley are accurately represented, so that critical conditions for starting debris flow are revealed. According to the method, high-precision simulation of the arid valley debris flow starting process and real-time monitoring of the air resistance effect are achieved, test repeatability and prediction precision are improved, and effective technical means and quantitative basis are provided for geological disaster mechanism research, early warning model construction and prevention and control measure optimization in the western arid valley area.

The invention discloses an urban rainfall flood model dynamic reconstruction method and device, equipment, a medium and a product, and belongs to the technical field of urban hydrology, and the method comprises the steps: obtaining a key pipe network node set in an urban rainfall flood model of a first region; according to the water head value of each pipe network node in the key pipe network node set at the t moment, calculating a hydraulic state vector at the t moment; based on a pre-trained machine learning model, a target preset pipe network topological structure corresponding to the hydraulic state vector at the t moment in a pipe network topological structure library is predicted, the input of the machine learning model is the hydraulic state vector, and the output of the machine learning model is used for indicating one preset pipe network topological structure in the pipe network topological structure library; and updating the urban rainfall flood model based on the target preset pipe network topological structure. According to the method, the accuracy degree of the urban rainfall flood model during rainfall simulation can be effectively improved.