517 results about "Mudflow" patented technology

The invention relates to a monitoring and prewarning system and a monitoring and prewarning method for geological disasters. The monitoring and prewarning system for the geological disasters comprises a plurality of global navigation satellite system (GNSS) monitoring stations 1, a continuous operational reference system (CORS) 2, a 3rd-generation (3G) wireless network or wireless bridge 3, a microwave communication system 4, a monitoring and prewarning server 5, a monitoring and prewarning central computer 6 and the like which are arranged in a monitored area. Each GNSS monitoring station 1 comprises a global positioning system (GPS) receiver 11, a 3G network transmission component 12, video monitoring equipment 13, a microwave communication transmission component 14, a power supply 15 and the like. In the method, the aims of forecasting and prewarning possibly initiated geological disasters automatically in real time can be fulfilled by setting the GNSS monitoring stations in areas liable to the geological disasters, monitoring ground surface displacement in real time by the CORS, performing real-time ground surface displacement monitoring on the geological disasters, such as collapse, landslide, debris flow, surface collapse, subsidence, ground fissure and the like, which can be caused by ground surface displacement, combining remote video monitoring, performing data processing on monitoring information, and automatically issuing prewarning information.

The invention discloses a debris flow mechanical parameter monitoring system and a debris flow early warning system. The debris flow mechanical parameter monitoring system and the debris flow early warning system aim at overcoming the defects on debris flow occurrence early warning in the prior art. The debris flow mechanical parameter monitoring system utilizes a total stress monitoring value P and a flow debris flow depth monitoring value h which are obtained on a monitoring section D to calculate the volume weight gamma C and the mean velocity VC of the monitored debris flow in real time. The optimized design includes that the debris flow mechanical parameter monitoring system adjusts monitoring data frequency conversion acquisition and sending in accordance with the flow depth monitoring value h and a flow depth change value delta h. The debris flow early warning system realizes debris flow hazard grading early warning according to the peak flow characteristics of the debris flow and determines the expected time of the occurrence of the debris flow. The debris flow mechanical parameter monitoring system can perform real-time and frequency conversion monitoring and sending of characteristic indicators such as the flow depth, the velocity, the peak flow and the volume weight of the debris flow. The debris flow early warning system can realize the analysis of the debris flow mechanical parameter characteristics and the early warning of the occurrence of the debris flow.

The invention discloses a debris flow risk degree evaluation method. The method comprises a step of determining the characteristic parameters associated with debris flow three elements, a step of establishing the comprehensive information evaluation system of the three elements, obtaining a three-element initial information evaluation matrix, and calculating the information entropy of the three elements through matrix operation and an entropy method, a step of establishing a debris flow information entropy model, taking three sub information entropy as an input factor, through BP neural network effect, and outputting debris flow information entropy, a step of defining a debris flow risk degree level standard according to the relation between the information entropy theory and the fact whether debris flow occurs, and carrying out risk degree evaluation on a search object. The invention discloses a debris flow probability model, the mutual interaction mechanism of debris flow three elements in a debris flow inoculation process can be comprehensively reflected, the complex nonlinear and dynamic processes of debris flow can be represented, the risk degree of the research object (single channel / regional debris flow) can be forecasted.

The invention discloses a method for monitoring mountain landslide and debris flow in mountainous areas based on an unmanned aerial vehicle. The method is characterized in that photographing is carried out through directional cruising of the unmanned aerial vehicle and an imaging device and a positioning device which are carried by the unmanned aerial vehicle, and collected data is analyzed through computer software so as to work out an accurate rescue mode and a path method in allusion to mountain landslide and debris flow in the mountainous areas. The method disclosed by the invention can accurately judge the damage area of a region in which mountain landslide or debris flow occurs through applying unmanned aerial vehicle remote sensing technologies to the field of mountainous area sudden accident rescue, and seamless searching is carried out by means of the unmanned aerial vehicle through computer modeling and planning, thereby monitoring damage conditions of the affected region quickly and comprehensively, transmitting information to a rescue command center timely, being convenient for rescue workers to plan an accurate rescue path timely, and greatly improving the rescue efficiency; and the method is applicable to detection work for affected mountainous areas under various complex conditions.

The invention discloses an interpretation and evaluation method for a reservoir area engineering geological survey and particularly relates to a hierarchy interpretation method and a comprehensive evaluation method for reservoir area engineering geological survey and evaluation. According to the interpretation and evaluation method, the interpretation of bad geologic bodies of landslide, collapse, debris flow and the like can be achieved, the precision can meet a requirement of feasibility, and the comprehensive evaluation of engineering geological problems of reservoir leakage, reservoir bank stability, reservoir bank collapse, reservoir immersion, the debris flow and the like can be achieved. The steps of the interpretation and evaluation method includes firstly, establishing a geographic information system (GIS) data bank of a reservoir area engineering geology and a three-dimensional true color remote-sensing image visualization system; secondly, establishing remote-sensing interpretation marks of the bad geologic bodies of the landslide, the collapse, the debris flow and the like; thirdly, performing preliminary interpretation with geography interpretation as a priority; fourthly, performing outdoor verification by matching of image interpretation; fifthly, performing detailed comprehensive interpretation with three-dimensional interpretation as a priority; sixthly performing reservoir leakage comprehensive interpretation based on a GIS; seventhly, performing reservoir bank stability comprehensive interpretation based on the GIS; eighthly, performing reservoir bank collapse and reservoir immersion comprehensive interpretation based on the GIS; and ninthly, performing reservoir debris flow comprehensive interpretation based on the GIS.

The invention discloses a system for measuring the flow rate of debris flow, a measuring method and an application thereof. The invention provides the measuring system against the problem that the prior art can not effectively measure the internal flow rate of the debris flow, the measuring system comprises a measuring device, a data collection device and a data processing device which are sequentially connected, wherein the measuring device comprises at least one impact sensor and at least one hydrostatic pressure sensor, the force receiving surface of the impact sensor is vertical to the flow direction of the debris flow; the force bearing surface of the hydrostatic pressure sensor is parallel to the flow direction of the debris flow; and the impact sensor and the hydrostatic pressure sensor which are positioned at the same horizontal height are used for measuring the original impact and the hydrostatic pressure of slurry of the debris flow at the horizontal height respectively. The measuring method provided by the invention can calculate according to data obtained by the measuring system, thereby obtaining the internal flow rate of the debris flow. The measuring system has simple structure, the measuring method has reliable principles, easy operation and high accuracy of measurement result, and the measuring system and the measuring method can be used in the flow rate measurement of the debris flow in field prototypes and indoor tests.

The invention relates to an earthquake warning system based on communication optical cables. The system can perform real-time monitoring on geological conditions in the area where optical cables are laid, and judge whether an earthquake occurs according to the vibration information from the optical cable, and uses the difference between the seismic wave transmission speed and the light transmission speed to realize early warning function; and the earthquake warning system can transmit threatening strong earthquake information to various towns which can be threatened a few seconds or even more in advance so as to reduce the loss caused by a strong earthquake as possible. The system can also be used for monitoring vicious incidents such as local geologic hazards like landslides and mudflows, and man-made destruction, and has the advantages of wide monitoring range, high sensitivity, good reliability, low cost and high utilization rate.

The invention discloses a calculating method for maximal lifting height of viscous debris flow and an application of the calculating method. The method comprises the following steps: taking a mud level line, in a natural channel, of the viscous debris flow as a datum line, and taking a maximal distance, lifted by the debris flow, of the perpendicular datum line on the mud level line in the process that the viscous debris flow encounters an obstacle as a maximal value of lifting height of the viscous debris flow; and determining volume-weight gamma c of the viscous debris flow, an included angle theta between a debris flow motion direction and a channel obstacle, average longitudinal shrinking slope J of the debris flow channel, a viscosity coefficient eta, yielding stress tau b and depth H of debris flow above an original channel surface, thereby determining the maximal lifting height value of the debris flow which encounters the obstacle in a motion process. The method is high in calculated result, simple and convenient in calculating, used for designing safety height of debris flow blocking engineering and adaptive to engineering needs.

The invention discloses a debris flow pre-warning method. In view of the shortcoming that the channel-started debris flow critical rainfall threshold calculation method in the prior art needs to be based on long-term debris flow observation data, the invention provides a debris flow pre-warning method. The core of the method is a debris flow start critical value Cr calculation method expressed by debris flow channel topography, geology, and a hydrological factor. According to the method, the Cr value of a pre-warning monitored area is used as a monitored value, and debris flow pre-warning levels are set according to the magnitudes of monitored values; when Cr is less than 0.35, the condition is green and safe; when Cr is larger than or equal to 0.35 and less than or equal to 0.47, a debris flow orange pre-warning is issued; and when Cr is larger than or equal to 0.47, a debris flow red pre-warning is issued. In optimized condition, the rainfall amount of 1h is used as a common monitored value at the same time. The invention also provides a debris flow pre-warning method with an equivalent rainfall R* value as a main monitored value. The method has a reliable principle, the threshold calculation more conforms to debris flow forming mechanism; the threshold calculation is not based on long-term observation data, and has better disaster preventing applicability.

The invention relates to a water-based or land-based or semi-floating common low-rise house and a floating vessel thereof, also relates to houses used for preventing natural disasters, comprising fire preventing houses, flood control and debris flow prevention houses, houses for drought resistance by reservoirs, water air conditioner houses for preventing global warming, and displacing houses, in particular to damping common low-rise houses. As a footing supports the house, the accidental inclination or sinking of the house can be limited in 0.7 or 0.3m, thus ensuring the personal safety. Also, other reasons are as follows: the weight of the house is light, the structural strength is high, the floating force is large and the stability is good. The importance of the case is variable damping function of the house, and the case is a damping machine which is realized by water, soil and wood and aims at challenging maximum earthquake, and how to lead the environment of the damping machine to be restored to environmental layout of the common house is described in the following.

The invention discloses a pre-warning method and a pre-warning system for mud-rock flow of a river basin, which are implemented by presetting a warning rainfall value. Aiming at the technical problems of unavailable correct definition of a critical rainfall value serving as a preset warning rainfall value, high data requirement on the application of a critical rainfall calculation method and the like, the invention discloses a pre-warning method and a pre-warning system for the mud-rock flow of the river basin, which take a characteristic rainfall value as a river basin mud-rock flow warning rainfall value. A relevant long-term daily rainfall observed data sequence of a specified mud-rock flow river basin is selected as a basis and a certain rainfall characteristic value which is in the daily rainfall data sequence and directly and firmly related to the occurrence of the mud-rock flow is determined to be used as the warning rainfall value of the river basin for the pre-warning method and the pre-warning system for the mud-rock flow by calculating and analyzing. The method has the advantages of reliable principle, easily-acquired basic data, simple calculation index, scientific, simple and convenient calculation process, simple equipment of a mating system and low construction cost. Tests show that the method and the system have high prediction accuracy for the occurrence of the mud-rock flow of the river basin.

The present invention discloses a mud-rock flow disaster dangerous case dynamic early warning method. On the basis of river basin investigation and monitoring system real-time data, a two-dimensionaldiving wave equation is employed to perform numerical simulation of mud-rock flow motion along a way, a submerging range and a submerging depth of the mud-rock flow is predicted on a DEM grid level, hazard-affected body data is superimposed to analyze information of degree, affected by the hazard, of a hazard-affected body, safe evacuation lines and the like, and the information is timely published to the population in the basin. The present invention further discloses a mud-rock flow disaster dangerous case dynamic early warning method. Monitoring information influencing mud-rock flow disaster factors is comprehensively obtained and analyzed to allow formation, generation and evolution processes of the whole mud-rock flow as a highly dynamic process to perform prediction and monitoring and perform fine early warning of the mud-rock flow disaster through four steps consisting of pre-disaster prediction, disaster-coming early warning, disaster generation early warning and dangerous casedynamic early warning. Compared to a current one-step and one-index monitoring early warning technology, the method provided by the invention fully combines dynamics features and rules of the mud-rock flow disaster, and is more scientific and higher disaster reduction practicality.

The invention discloses a stability measurement and calculation method for a viscous debris flow entity silt arrester, and aiming at avoiding the defect that a conventional measurement and calculation method only draws the most extreme situations into consideration and cannot demonstrate the dynamic change process of the stability of the silt arrester in the debris flow process, provides the stability measurement and calculation method which can reflect the dynamic change process of the stability of the silt arrester in the process that the entity silt arrester intercepts debris flow. The stability measurement and calculation method comprises the following steps: firstly, investigating and determining that the entity silt arrester belongs to an empty reservoir overflowing working condition or a half reservoir overflowing working condition; determining engineering parameters through field investigation, indoor soil tests and silt arrester design projects; and measuring and calculating the stability of the silt arrester by use of calculation methods of anti-slip stability parameters Kc(n-1) and stability against overturning parameters Ky(n-1) under different working conditions. The stability measurement and calculation method can be used for particularly measuring and calculating the stability of the silt arrester in the full reservoir overflowing state, can provide scientific basis and references for parameter optimal design, structural safety checkup and the like of debris flow control projects, avoids waste of the construction cost, is closer to the project reality and conforms to the requirements of actual engineering.

The invention provides a method for early warning mountain flood debris flow based on steep slope convergence and cross section flow calculation. The method comprises the following steps of: (1) processing high-precision DEM terrain data and remote sensing data of debris flow single ditches and flow domains where the debris flow single ditches are located, so as to obtain a scattered point elevation and a slope of each grid unit; (2) obtaining a rainwater infiltration amount of each grid unit by combining with continuous long-term rainfall data, according to actual geological conditions of different debris flow ditches; (3) calculating surface flow concentration of the debris flow ditches and the flow domains where the debris flow ditches are located using a calculation method based on thesteep slope flow convergence; and (4) performing early warning base on flooding range of the mountain flood debris flow corresponding to the rainfall amount in different time periods. The invention further provides a system for early warning the mountain flood debris flow. The method and the system are applied to early warning of mountain flood and valley type debris flow. The effects are obviouson the early formation of the early warning result for the mountain flood debris flow and the improvement of the early warning efficiency. It has great practical significance for safeguarding personnel, emergency hedging, and reducing lives and property losses of people.

The invention discloses a contact debris flow motion parameter monitoring device which comprises a columnar monitoring pile, wherein the lower area of the columnar monitoring pile is fixed in a bed of a debris flow gully, and parameter monitoring sensors are arranged in the upper area of the columnar monitoring pile, and comprise an acceleration sensor, an ultrasonic sludge level sensor and an impact force sensor; the ultrasonic sludge level sensor is arranged above the impact force sensor. The invention further provides a contact debris flow motion parameter monitoring system implemented by the monitoring device. An upper control center of the system communicates with a signal transmission device of the monitoring device through a wireless signal, and the contact debris flow motion parameter monitoring device can be arranged in the debris flow gully in a second-stage or third-stage manner. The invention further provides a debris flow multi-stage early-warning method implemented by the monitoring system. By the device and the system, key power parameters during the real-time monitoring of a debris flow motion process can be comprehensively acquired. According to the method, early-warning accuracy can be improved.

The invention discloses a viscous debris flow rectangular drainage groove depth measuring and calculating method and application. According to the method, the influences of the debris flow volume weight, the debris flow solid matter grading, the ditch bed gradient and the mud depth on the flow velocity of viscous debris flow are fully considered, and a viscous debris flow mean velocity calculation formula with high applicability is established based on statistical regression of a large quantity of observation and exploration data, and then the design depth of a rectangular drainage groove for the viscous debris flow can be determined by combining the design width of the drainage groove and the design flow of the drainage groove on the design conditions and considering the free height of the drainage groove. The method can provide effective technical support for optimal design of the rectangular drainage groove for the viscous debris flow and meet the practical engineering requirements.

The invention discloses a debris flow rainfall I-D curve threshold construction method and a debris flow early warning method. The I-D curve threshold construction method comprises the following stepsof firstly, acquiring basin underlying surface data required for a Richard model and Van Genuchten equation numerical simulation; starting a hydrologic simulation process under a given rainfall intensity condition; determining the stability and the runoff generation state of each grid in a drainage basin along a time sequence, and calculating the bulk density of a water and soil mixture; and recording data according with a control point to fit an I-D curve, and finally acquiring a set of I-D thresholds under a previous rainfall amount condition. The invention simultaneously provides a corresponding drainage basin debris flow early warning method. By using the method of the invention, the idea of fitting the curve through historical data statistical analysis is abandoned, and the breakthrough of constructing a debris flow generation condition threshold from the aspect of the measurement of the dynamic index of a debris flow characteristic is realized. The method can effectively solve the problem of using the I-D curve threshold to implement debris flow early warning in the drainage basin without data.

The invention discloses a theory of durable three-dimensional energy dissipation shock absorption and shock insulation base for a large sized vertical type liquid storage tank, a structural method thereof and a structure thereof. The base takes a reinforced concrete rotary thin shell with ring beams as a shock insulation and bearing structure, a sand bedding layer thickly laid under the rotary thin shell as a bearing and energy dissipation shock absorption structure, and an underlayer as a concrete precast slab protective layer and a earthwork synthetic material impermeable layer. The engineering construction method is briefly introduced here. The liquid storage tank which is good in rigidity as well as flexibility can resist a destructive 10-magnitude earthquake, the service life is as long as 70 to 100 years, but for other disasters such as earthquake downfall, bad slip, collapse and debris flow, etc., additional protective measurements need to be taken.

The invention discloses a debris flow infrasound signal screening method, a debris flow generation place positioning method and a debris flow motion path real-time monitoring method. Aiming at the defects that in the prior art, in the infrasound positioning process, signal screening is not carried out, signal identification accuracy is low, coordinates cannot be accurately positioned and the like, the invention provides the debris flow infrasound signal screening method. The method comprises the steps as follows: firstly, background noise interference is eliminated by four indexes of signal duration, signal relevance, a signal predominant frequency and a sound pressure and then a method of firstly and mainly analyzing an abnormal signal and then carrying out reference analysis on the abnormal signal is adopted to simultaneously process signals acquired by a plurality of sensors in two paths so as to ensure accuracy and high efficiency of screening debris flow generation signals. On the basis of the signal screening method, the invention also provides the debris flow generation positioning method which can realize accurate coordinate positioning on a debris flow generation site and further provides the debris flow motion path real-time monitoring method which can realize visual real-time monitoring on debris flow.

The invention relates to a solid-liquid multiphase dynamic numerical simulation method suitable for debris flow, which adopts a numerical simulation model of a solid-liquid multiphase debris flow power process, and comprises the following steps: firstly, acquiring debris flow channel starting, movement and accumulation dynamic information through field scientific investigation and physical and mechanical experiments; Determining high-precision topographic data and object source data in the calculation area through a geographic information system or a high-precision 3D topographic scanner, expressing the high-precision topographic data and the object source data as (x, y, h) grid data through grid coordinate conversion, and respectively representing x, y and h as x, y coordinates and elevation values h of topographic points; Soil and fluid parameters are determined and estimated from a proper amount of soil samples in the channels in the calculation area through indoor physical and mechanical experiments, so that all parameters needing to be prepared in the pretreatment stage of the numerical method are obtained; According to the method, the scientificity and reliability of numerical simulation research in the debris flow dynamic process are improved, the pertinence of disaster prevention and control is improved, the prevention effect is enhanced, and technical support is provided for debris flow disaster reduction.

The invention discloses a debris flow starting test artificial rainfall simulating method. The adopted debris flow starting test artificial rainfall simulating system comprises an artificial rainfalldevice, a rainfall monitoring device and a control device, wherein the artificial rainfall device comprises a water tank, a water pump, a rainfall bracket and a rainfall spray head; the rainfall sprayhead is arranged on the rainfall bracket and is connected with a water tank through a water pipeline; the water tank is connected with a water pump; the rainfall monitoring device records actual rainfall capacity, soil moisture content, soil displacement of soil and the tension amount of a tension sensor, and sends the detected data to the control device; the control device judges whether a debris flow happens according to the collected data, and records the slope runoff, slope internal runoff, soil body creep deformation and the debris flow forming time when the debris flow happens. The method disclosed by the invention is simple in structure and convenient to operate, and can be used for detecting the debris flow happening process by simulating different rainfall types; the detection result is quick and accurate, and a basis is provided for predicting and forecasting debris flow.

The invention relates to an experimental device for monitoring the whole process of an instability disaster of a discrete fill dam, and belongs to the technical field of geotechnical engineering. Thedevice comprises a water supply device, a rainfall simulation device, a support device and a dam body damage and dam break debris flow motion experiment device. The water supply device provides required water for experiments, the rainfall simulation device is used for simulating rainfall working conditions, the support device is used for supporting the rainfall simulation device and mounting ultrasonic equipment, and the dam body damage and dam break debris flow movement experiment device is mainly used for completing dam body damage and dam break debris flow (flood) movement process research.According to the invention, the evolution process from dam body damage to dam break debris flow (flood) of a tailing dam or a homogeneous earth dam in a downstream river channel can be simulated andresearched under the conditions of rainfall, flood overtopping and piping, parameters such as dam body damage degree, dam body pore water pressure, dam body deformation, dam break debris flow (flood)impact force, flow speed and submerging height are recorded through automatic monitoring equipment, and research on dam body damage and disaster-causing processes is achieved.

A debris flow disaster early warning method based on landform information entropy and rainfall comprises the following steps: acquiring digital elevation model data of a region by collecting debris flow gully topographic data in a drainage basin to be early warned; calculating the landform information entropy of the debris flow gully based on the digital elevation model data of the region; obtaining historical debris flow disaster outbreak time and corresponding historical rainfall data of the debris flow gullies in the drainage basin, establishing a debris flow outbreak model, and determining a rainfall early warning threshold value of debris flow outbreak; and according to the landform information entropy of the debris flow and the corresponding rainfall early warning threshold value, carrying out real-time monitoring and early warning on the debris flow disaster of each debris flow gully in the drainage basin by adopting a double-index comprehensive evaluation method. According to the method, on the basis of the landform information entropy of the debris flow gully, the landform factors and the rainfall factors are combined, the problem that in a traditional early warning method, early warning is conducted with induction factors as main indexes, and topographic element indexes are not considered is solved, and compared with the prior art, the debris flow disaster early warning accuracy is higher.

The invention discloses a debris flow outbreak scale calculation method. In view of the shortcoming that the channel-started debris flow outbreak scale calculation method in the prior art needs to be based on long-term debris flow observation data, the invention provides a debris flow outbreak scale calculation method. The core of the method is a debris flow start critical value Cr calculation method expressed by debris flow channel topography, geology, and a hydrological factor, and a debris flow scale calculation method expressed by the critical value Cr. According to the method, the Cr value of a monitored area is firstly used as a monitored value, and when Cr is larger than or equal to 0.35, risk of debris flow occurrence is determined and outbreak scale is further calculated. In optimized condition, the method also uses the rainfall amount of 1h as a common monitored value to determine the risk of debris flow occurrence. The method has a reliable principle, and the threshold calculation more conforms to debris flow forming mechanism; the threshold calculation is not based on long-term observation data, and has better disaster preventing applicability.

The invention relates to a construction method of a tree aggregate. In the construction method, various aggregation methods are singly or comprehensively used, an assistant technique is matched, a new artificial tree group can be constructed, and construction is carried out according to designed drawing to realize industrial production. The constructed tree aggregate can be more stably and perfectly aggregated. Compared with the tree single bodies, the tree aggregate has the aggregation effect, and new shape, functional and characteristics. By using the technique, live great trees and shaped nursery stock can be quickly produced in garden, horticulture and agriculture industries, so as to build a three-dimensional cultivation new model, in addition, a cultivation mode for preventing and controlling landslide and mudflow is built, a new sandstorm-resistant cultivation mode is built, a tree special (such as bark, latex, rosin, rhus lacquer, timber, fruit and the like) product duplication yield-increasing mode is built, and a whole-plant, low-carbon and energy-consumption-balanced human dwelling mode is built.

The invention discloses a debris flow velocity measurement method and an implementing system thereof. Aiming at the defect that methods and devices for measuring internal flow velocity of debris flow are laced in the prior art, the invention provides the method for measuring the debris flow velocity, which comprises the following steps of: arranging two measuring cross sections along the motion direction of the debris flow, measuring and acquiring shearing force change data of the debris flow at the corresponding positions on the two cross sections, and then obtaining corresponding internal flow velocity of the debris flow by calculating according to the shearing force waveform comparison result at the corresponding positions on the two cross sections. The invention also provides a measurement system and an experimental measurement system for implementing the method. Compared with the prior art, the invention solves the technical difficult problem that the measurement of the internal flow velocity of the debris flow can not be solved all the time in the prior art and also solves the technical difficult problem that a routine measurement instrument can not work in the flowing debris flow. The measurement method is reliable in principle, easy to operate, high in measurement result accuracy, simple in measurement system structure, saves the cost and can be used repeatedly.

The invention discloses a plane meshing method and dangerousness measuring method for a debris flow accumulation fan. For the defect that an existing dangerousness degree partition and quantitative evaluation method for the debris flow accumulation fan is mainly influenced by subjectivity, the plane meshing method for the debris flow accumulation fan is firstly provided. According to the plane meshing method for the debris flow accumulation fan, an accumulation fan planar model is built on the basis of data surveying, and the terrain of the debris flow accumulation fan is divided into mesh units. Based on the method, the dangerousness measuring method for the debris flow accumulation fan is further provided. According to the dangerousness measuring method for the debris flow accumulation fan, the dangerousness degree P (xi) of each mesh unit is measured and calculated, and the dangerousness of the debris flow accumulation fan is determined according to the distribution characteristic of the dangerousness degrees P (xi) of the mesh units on the terrain of the debris flow accumulation fan. According to the plane meshing method and the dangerousness measuring method for the debris flow accumulation fan, data are acquired through surveying, mapping and other means, and an evaluation result is not influenced by subjective factors; the measuring method decomposes the dangerousness degree of the accumulation fan into a component P (u) and a component P (h), the dangerousness of burying and the dangerousness of impact can be measured respectively, and debris flow prevention engineering practice is guided better.

The invention discloses a herringbone mud-rock flow water and stone separating system designing method. Structure of a herringbone mud-rock flow water and stone separating system is disclosed in the prior art, and no designing method of the system is disclosed yet, so that designing and application of the prevention and control system are limited. In engineering design of the herringbone mud-rock flow water and stone separating system, key parameters include span B of a water-stone separation grating, height H of the water-stone separation grating and length L of the water-stone separation grating. On the basis of basic parameters determined according to on-site inspection, experiments and mud-rock flow engineering investigation and design standards, a method for designing the span B, the height H and the length L of the water-stone separation grating in the engineering design method of the herringbone mud-rock flow water and stone separating system is provided. The herringbone mud-rock flow water and stone separating system designing method solves the technical problem that the herringbone mud-rock flow water and stone separating system cannot be accurately designed yet in engineering design, and is reliable in principle, scientific, simple and convenient in calculation process and adaptive to engineering construction requirements.

The invention discloses a method for calculating a value of average peak flow rate of paroxysmal mud-rock flow and the once total volume of mud-rock flow and an application thereof. Aiming at solving the disadvantages of lower accuracy and practicability of the calculation of once total volume of the mud-rock flow and the shortage of method for calculating the average peak flow rate of the paroxysmal mud-rock flow in the prior art, the invention provides the method which utilizes field measured data for calculating the value of average peak flow rate of the paroxysmal mud-rock flow and the once total volume of the mud-rock flow. Based on the analysis result of all reliable observed data from 1987 to 2004 in China, the calculation method builds a model for calculating the value of the average peak flow rate of the paroxysmal mud-rock flow, and takes the calculation of the value of average peak flow rate of the paroxysmal mud-rock flow as a key step to build a model for calculating the once total volume of the paroxysmal mud-rock flow and the once total volume of mixed mud-rock flow. Compared with the prior art, the invention can accurately calculate the corresponding flow rate and the total volume index of the mud-rock flow by the field measurement and observation of the mud-rock flow, fills the gap in the research field, and is especially suitable for engineering application.

The invention discloses a viscous debris flow river-blocking calculation method and an application thereof, belonging to the technical field of debris flow prevention and treatment engineering. The viscous debris flow river-blocking calculation method comprises the following steps of: obtaining a confluence angle of a branch channel and a main river as shown in the specification by measurement; measuring the average width B1 of the main river and the flow Qm of the main river at the confluence position of the main river and the branch channel, and determining the flow per unit width Q1 of the main river; measuring the average width B2 of the branch channel and the flow of the debris flow as shown in the specification at the confluence position of the main river and the branch channel, determining the flow per unit width of the branch channel as shown in the specification, determining the ratio of the flow per unit width of the branch channel and the main river as shown in the specification, measuring water depth h of the main river at the confluence position of the main river and the branch channel, determining a volume factor yt, measuring the yield stress of the debris flow as shown in the specification, and the density of the debris flow as shown in the specification, and determining a yield stress factor x of the debris flow; and judging whether river blocking can be caused by the viscous debris flow or not according to a judgment factor y. A debris flow river-blocking calculation model established in the invention has the characteristics of being harmonious in dimension and high in calculation result accuracy, and is capable of accurately judging viscous debris flow river-blocking; and thus, the debris flow prevention and treatment effect is improved.