30 results about "Flash flood" patented technology

The invention discloses a flash flood early warning method based on deep learning. The invention adopts the RNN model with LTSM function, and adding the long short-term memory (LTSM) method to the model algorithm can effectively solve the problems of gradient disappearance and gradient explosion in RNN, and more Effectively forecast small watersheds or mountain torrent areas, realize reliable mountain torrent disaster early warning and forecast, greatly improve the forecast time, the model only needs to pay attention to the input data, has the characteristics of easy operation, fast calculation speed, and easy transfer to other areas, and With the actual application of the model and the continuous accumulation of data, there is no need to manually adjust the parameters twice. The model will actively optimize and adjust the parameters to make its application easier and more convenient.

The invention discloses a simple mountain torrent early-warning device based on an excess infiltration runoff principle. The simple mountain torrent early-warning device comprises a water collecting cup and an information display unit installed in the water colleting cup. A water penetrating port is formed in the bottom wall of the water collecting cup. An adjusting turn button used for adjusting a leakage speed is installed at the water penetrating port. The information display unit comprises a yellow precaution device, an orange precaution device and a red precaution device which are successively from a low water level to a high water level. The simple mountain torrent early-warning device has the advantages that the structure is simple, the excess infiltration runoff principle is used as the basis, and the excess infiltration runoff process is modeled and visualized; by means of the adjusting and setting the adjusting turn button, mountain torrents are accurately simulated; the device is high in adjustment, applicable to most mountainous areas, and high in popularization; in addition, when the device is in use, the forming and eruption of the mountain torrents can be grasped in real time only by noticing the prompts of the precaution devices and buzzer alarms, and the monitoring and early warning effects of the mountain torrents are further improved, so that the life and property safety of people in mountainous areas is ensured.

A concrete face rockfill dam water pre-settling construction method. After the empty steel gabions are neatly arranged and welded into one body, stones are filled in the gabions; the steel gabions are stacked along the downstream side slope of the rockfill dam body. , are connected to each other with steel bars; threaded steel bars are used as anchor rods, and the steel gabion is anchored with the mountains on both sides. After the water flows through the dam, the pre-settling of the water is completed. The concrete face rockfill dam water-passing pre-settling construction method provided by the present invention can withstand the test of repeated mountain torrent erosion after adopting reinforced gabion protection construction for the downstream side slope of the rockfill dam body; The settlement of the rockfill dam surface due to water passing through passively improves the compactness of the rockfill dam body and accelerates the settlement and deformation of the rockfill dam body. Water passing is equivalent to releasing the settlement of the rockfill dam body in advance, which is beneficial to Settlement deformation control of rockfill dam body and safety and stability of dam body.

The invention discloses a critical rainfall early warning method for mountain torrent disasters in a multi-scenario mode, which comprises the steps of: collecting disaster prevention object data with a small watershed as a unit; determining the soil state in the early stage; determining the type of possible local rainstorms to carry out rainfall time course allocation design; scenarios Mode combination; determine the critical rainfall under different scenario modes; select the corresponding critical rainfall grading warning for different weather conditions. The present invention considers the flash flood disaster outbreak conditions under different scenarios under natural conditions, focuses on the design rain pattern and the influence of the uncertainty of the soil state in the early stage, and combines the measured data of the control section of the small watershed to try to calculate different critical rainfall values, according to the actual situation The corresponding mountain torrent early warning was issued, and through the test of the measured storm and flood process, it was proved that the mountain torrent disaster early warning mode under the multi-scenario mode is feasible, which improved the fit between the mountain torrent disaster early warning and natural conditions, and further improved the mountain torrent disaster early warning. reliability, credibility and applicability.

The invention discloses an energy-saving and power-saving binary output type mountain torrent sensing device which comprises an independent water flow sensor and an independent water level sensor. The water flow sensor consists of a water flow impact sensing device and a tension measuring device, and the water level sensor comprises a water level follow-up device consisting of an outer floater, a crown block and inner and outer connection pull ropes. Short circuit plate electrodes are mounted in the water flow sensor and the water level sensor respectively and provided with electrodes with the minimum dimension delta or delta', measurement binary output range 2N and measurement length output range delta*2N, and all electrodes with equal weights are in short circuit connection. The short circuit plate electrodes in the water flow sensor include a high-order short circuit plate electrode and a low-order short circuit plate electrode. Numbers are outputted according to short circuit relation between short circuit plates and short circuit connecting lines of short circuit plate electrodes. Energy is saved by external arrangement of a rain starting switch device and a regular brief starting switch device. The energy-saving and power-saving binary output type mountain torrent sensing device which adopts binary output is simple and reliable in structure and easy to popularize.

The invention discloses a dynamic risk assessment method for mountain torrent disasters coupled with hyperspectral monitoring and GIS. It includes the following steps: Step 1: Construct a hyperspectral remote sensing technology application system; Step 2: Extract information related to mountain torrent disasters; Step 3: Simulate the evolution and disaster process of single and compound disasters; Step 4: Build a stepwise regression equation ; Step 5: Determine the index system of the risk of mountain torrent disaster; Step 6: Obtain the risk map of mountain torrent disaster and the result map of mountain torrent disaster vulnerability; Step 7: After normalization, obtain the risk map of mountain torrent disaster at multiple spatial scales; Step 8 : To divide the flash flood disaster risk zoning in a specific area. The invention has the advantages of realizing the accuracy, reliability and timeliness of the basic data in areas prone to mountain torrent disasters.

The invention discloses a regional mountain torrent risk prediction method and system, wherein the prediction method includes: S1, predicting the weather information of all hills in the region based on a meteorological model; S2, screening out the mountains that need risk prediction based on the weather information Hill; S3. Divide the hills that need risk prediction into different risk prediction levels according to their basic information; different risk prediction levels correspond to different risk prediction periods; The preliminarily determined disaster-causing factors are screened to obtain the main disaster-causing factors affecting mountain torrents; S6. Training and generating multiple mountain torrent risk prediction models based on the main disaster-causing factors; S7. Selecting several risk prediction models with the best performance to form the final Risk forecasting model; S8. Perform flash flood risk forecasting for the hills to be forecasted. The invention realizes risk prediction for regional hills, realizes low cost, wide coverage and high processing efficiency, and improves the safety of hills.

The present invention provides a method for early warning of torrent and debris flow based on steep slope confluence and cross-section flow calculation, comprising steps: 1. By processing the high-precision DEM terrain data and remote sensing data of the single ditch of the debris flow and its watershed, each grid unit is obtained 2. According to the actual geological conditions of different debris flow ditches, combined with continuous long-duration rainfall data, the rainwater infiltration of each grid unit is obtained; 3. Using the calculation method based on steep slope confluence, calculate the debris flow ditches and The surface confluence of the watershed where it is located; 4. Early warning through the submerged range of mountain torrents and debris flows corresponding to the rainfall in different time periods. A flash flood and mudslide early warning system is also provided. The invention is applied to the early warning of mountain torrents and valley-type mud-rock flows, and has an obvious effect of improving the early warning efficiency for the early formation of mountain torrent mud-rock flows early warning results. It has great practical significance for ensuring personnel safety, emergency avoidance, and reducing the loss of people's lives and property.

The invention relates to the field of geotechnical engineering for geographical environment control, and specifically discloses a torrent and debris flow sand retaining dam with the function of generating electricity and its application. In the present invention, by adding a splitter device upstream of the sand control dam, the turbine water filter net and the debris flow grid in the device can filter and separate water and stones, and can use the separated water for water storage, and use the height difference to make the sand control dam It has the function of generating electricity. The torrent and mud-rock flow sand retaining dam of the present invention not only reduces the disaster of torrent and mud-rock flow, but also utilizes the advantage of the natural height difference of the sand retaining dam to generate power, so that the sand retaining dam has certain economic utility.

The invention discloses a real-time mountain floodv early warning method based on critical rainfall of rainfall time-history distribution. The rainfall data in a T period before a flood peak appears in each previous flooding process are firstly extracted, and the cumulative rainfall in the T period is calculated; then, a Lorenz curve is constructed based on the rainfall data in the T period beforea flood peak appears, the Gini coefficient of the Lorenz curve is calculated, and based on the Gini coefficient, the rainfall in the T period before the flood peak appears is divided into three types; the tension water content saturation, that is, initial soil water content saturation, at the T time before the flood peak appears is then counted; whether each previous flood is an over-alarm floodis judged, cumulative rainfall-initial soil water content saturation scatter diagrams for rainfall in even, uneven, and concentrated types are made respectively, points corresponding to the over-alarmfloods are marked, and a critical rainfall line is drawn in combination of the points corresponding to the over-alarm floods; and real-time early warning is finally carried out according to the critical rainfall line.

The invention discloses a mountain torrent early warning method considering the spatial heterogeneity of rainfall, which belongs to the field of hydrological forecasting. The method includes: acquiring soil saturation and composite rainfall within a set time period before the occurrence of multiple historical flood peaks in the watershed to be early warning; wherein , the combined rainfall takes into account both the amount of rainfall and the spatial distribution of rainfall; construct a mountain torrent early warning model based on the above soil saturation and compound rainfall; collect the soil saturation of the watershed to be warned, and obtain the critical composite rainfall index corresponding to the current soil saturation according to the mountain torrent early warning model, By comparing the current composite rainfall and the critical composite rainfall index in the basin to be warned, it is judged whether the flood caused by rainfall is a super-warning flood. The method of the invention can specifically quantify the unevenness of the spatial distribution of rainfall and the distribution of the center of the rainstorm, and the calculated critical composite rainfall index not only considers the size of the rainfall, but also considers the spatial distribution of the rainfall, thereby improving the accuracy of mountain torrent warning.

The invention discloses a school mountain torrent early warning terminal station which comprises a display unit, an alarming unit, an RCU remote control unit, a monitoring computer and a power supply unit, wherein the power supply unit can provide electricity for the early warning terminal station, the RCU remote control unit is connected with the alarming unit and the monitoring computer respectively, and the monitoring computer is connected with the display unit. The school mountain torrent early warning terminal station disclosed by the invention has rich display information types, can refresh and display received possession periphery water level rainfall monitoring station information, possession weather information, mountain torrent early warning information, disaster emergency plan, on-campus registered teacher and student data registration information, notice and announcement information and the like on a display module in real time and enables local early warning objects to comprehensively and timely know local related early warning information.

The invention relates to a method for constructing and updating a mountain torrent disaster database based on web crawler and semantic recognition. It uses web crawler technology and semantic analysis method to grab information web pages and extract key information of mountain torrent disasters, and packs the extracted information into The standard related information is stored in the mountain torrent disaster database, and it is updated and supplemented in real time. This method makes full use of network information resources, supplements and collates the flash flood information at the site, describes and analyzes the occurrence and development process of flood events more comprehensively and accurately, and solves the problem that the current flash flood disaster network data resources are large in number, variety, and source, and it is difficult to accurately The technical problem of efficiently extracting useful data information provides a useful method for the rapid construction and update of the mountain torrent disaster database.