CN114708499A - Method and device for calculating landslide source area - Google Patents
Method and device for calculating landslide source area Download PDFInfo
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Abstract
The invention provides a method and a device for calculating the source area of a landslide object, wherein the method comprises the following steps: determining potential landslide perimeter feature points in a target area; determining the landslide perimeters of the potential landslide object sources according to the potential landslide perimeter feature points; determining the width of the potential landslide object source and the forward sliding length of the potential landslide object source according to the landslide perimeter of the potential landslide object source; and determining the area of the potential landslide object sources in the target area according to the width and width-length ratio of each potential landslide object source. The method can accurately obtain the area of the potential landslide object source through simple calculation, and is not influenced by rock soil materials and landslide inducement in the target area when the method is executed to calculate the area of the potential landslide object source.
Description
Technical Field
The invention relates to the technical field of geological engineering, in particular to a method and a device for calculating landslide source area.
Background
Most landslide object source shapes are irregular tongues, ellipses and the like, and the existing method for acquiring landslide object source areas comprises 2 methods: (1) in the field survey, the width and length of the landslide source are measured, then the landslide source is approximated to a rectangle, and the product of the two is estimated as the upper limit of the landslide source area. (2) And (3) circling out a planar area of the landslide object source through a remote sensing image, and obtaining the area of the landslide object source through computer integration. For the first estimation method, in the field investigation, the width and the length of the acquired landslide object source are over-estimated, and the product of the width and the length is greatly different from the actual area of the landslide object source. The second estimation method requires computer integration to obtain the source area of the landslide, and the calculation process is complex. In addition, for a potential landslide, the perimeters of the landslides are not connected, and the estimation of the landslide object area value of the potential landslide cannot be realized by the two methods.
Disclosure of Invention
Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the landslide area of a potential landslide cannot be estimated, so as to provide a method and a device for calculating the source area of a landslide object.
The invention provides a method for calculating the source area of a landslide object, which comprises the following steps: determining potential landslide perimeter feature points in a target area; determining the landslide perimeters of the potential landslide object sources according to the potential landslide perimeter feature points; determining the width of the potential landslide object source and the forward sliding length of the potential landslide object source according to the landslide perimeter of the potential landslide object source; and determining the area of the potential landslide object sources in the target area according to the width and width-to-length ratio of each potential landslide object source, wherein the width-to-length ratio of the potential landslide object sources is the ratio of the width of the potential landslide object sources to the forward-sliding length of the potential landslide object sources.
Optionally, in the method for calculating an area of a landslide object source provided by the present invention, the potential landslide perimeter feature points include a terrain swelling feature point and a terrain staggered section deformation feature point, and determining a landslide perimeter of the potential landslide object source according to each potential landslide perimeter feature point includes: and determining a closed area formed by communicating the terrain swelling characteristic points and the terrain staggered section deformation characteristic points in the target area as a landslide perimeter of the potential landslide source.
Optionally, in the method for calculating the area of the landslide source provided by the present invention, the area of the potential landslide source is calculated by the following formula:
wherein A isLThe area of the potential landslide object source, W the width of the potential landslide object source, L the length of the potential landslide object source in the forward direction, pi the circumference value, epsilon the width-length ratio of the potential landslide object source,
optionally, in the method for calculating a landslide source area provided by the present invention, the method further includes: acquiring the width of each landslide object source in a target area and the length of each landslide object source in the forward sliding direction; determining the area of the landslide object source of each landslide object source in the target area according to the width and width-length ratio of each landslide object source, wherein the width-length ratio of the landslide object source is the ratio of the width of the landslide object source to the length of the landslide object source in the forward sliding direction; and determining the total area of the landslide source in the target area according to the area of the potential landslide source in the target area and the area of each landslide source.
The second aspect of the present invention provides a landslide source area calculation apparatus, including: the peripheral characteristic point determining module is used for determining potential landslide peripheral characteristic points in the target area; the landslide perimeter determining module is used for determining the landslide perimeter of the potential landslide object source according to the potential landslide perimeter characteristic points; the peripheral parameter determining module is used for determining the width of the potential landslide object source and the forward sliding length of the potential landslide object source according to the landslide periphery of the potential landslide object source; and the potential landslide object source area calculation module is used for determining the potential landslide object source area in the target area according to the width and width-to-length ratio of each potential landslide object source, wherein the width-to-length ratio of the potential landslide object source is the ratio of the width of the potential landslide object source to the forward sliding length of the potential landslide object source.
Optionally, in the device for calculating the area of the landslide object source provided by the present invention, the potential landslide perimeter feature points include a terrain heave feature point and a terrain staggered section deformation feature point, and the landslide perimeter determination module is specifically configured to determine a closed area formed by communicating the terrain heave feature point and the terrain staggered section deformation feature point in the target area as the landslide perimeter of the potential landslide object source.
Alternatively, in the calculating device of landslide source area provided in the present invention, the potential landslide source area is calculated by the following formula:
wherein A isLThe area of the potential landslide object source, W is the width of the potential landslide object source, L is the length of the potential landslide object source in the forward sliding direction, pi is a circumference value, epsilon is the width-length ratio of the landslide object source,
optionally, in the device for calculating a source area of a landslide object provided by the present invention, the device further comprises: the landslide object source parameter acquisition module is used for acquiring the width of each landslide object source in the target area and the length of each landslide object source in the forward sliding direction; the landslide object source area determining module is used for determining the landslide object source area of each landslide object source in the target area according to the width and the width-length ratio of each landslide object source, and the width-length ratio of the landslide object source is the ratio of the width of the landslide object source to the forward sliding length of the landslide object source; and the total landslide source area determining module is used for determining the total landslide source area in the target area according to the potential landslide source area in the target area and the landslide source areas.
A third aspect of the present invention provides a computer apparatus comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executable by the at least one processor to perform the method of calculating an area of a landslide source as provided in the first aspect of the invention.
A fourth aspect of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores computer instructions for causing a computer to execute the method for calculating the source area of a landslide object according to the first aspect of the present invention.
The technical scheme of the invention has the following advantages:
the method and the device for calculating the area of the landslide object source provided by the invention determine the landslide perimeter of the potential landslide object source through the potential landslide perimeter characteristic points in the target area, thereby realizing the identification of the potential landslide object source, after the landslide perimeter of the potential landslide object source is identified, the parameter information of the potential landslide object source can be rapidly acquired, namely the width of the potential landslide object source and the length of the potential landslide object source in the forward sliding direction, and the calculation of the area of the potential landslide object source is realized based on the width and the width-length ratio of the potential landslide object source, so that the invention can accurately calculate the area of the potential landslide object source, in addition, when the method is executed to calculate the area of the potential landslide object source, the influence of rock soil materials and landslide inducement in the target area can not be caused, and the method is suitable for calculating the area of the potential landslide object source with different rock soil materials and different inducement. In addition, in the method and the device for calculating the area of the landslide object source, the obtained area of the potential landslide object source is closer to the actual area by determining the area of the potential landslide object source in the target region according to the ratio of the width to the width of the potential landslide object source and considering that the obtained width of the potential landslide object source and the forward sliding length of the potential landslide object source are possibly over-estimated, and the calculation method provided by the invention is simpler.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a flowchart of a specific example of a method for calculating a landslide source area in an embodiment of the present invention;
fig. 2 is a distribution scatter diagram of an actual landslide source area and a landslide source area calculated by executing the method for calculating a landslide source area according to the embodiment of the present invention;
fig. 3 is a landslide source area estimation error distribution obtained by performing the method for calculating a landslide source area according to the embodiment of the present invention;
FIG. 4 is a diagram illustrating landslide distributions for four landslide catalogs and estimated error distributions for source areas of landslide in different landslide catalogs in an embodiment of the present invention;
FIG. 5 is a functional block diagram of a specific example of a device for calculating the source area of landslide material in an embodiment of the present invention;
fig. 6 is a schematic block diagram of a specific example of a computer device in the embodiment of the present invention.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the technical features related to the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
The embodiment of the invention provides a method for calculating the source area of a landslide object, which comprises the following steps of:
step S11: potential landslide perimeter feature points within the target area are determined.
In an alternative embodiment, for a potential landslide, the perimeter of the landslide is the portion of the landslide that will slide, when the landslide perimeter is equivalent to the perimeter of the source of the landslide. Although complete sliding damage does not occur, the landslide object source peripheral deformation characteristic is still more obvious, and therefore, the position of the landslide object source peripheral deformation characteristic in the target area can be determined as a potential landslide periphery characteristic point.
In an optional embodiment, a remote sensing image of the target area is obtained, and then the remote sensing image is subjected to feature analysis to determine potential landslide perimeter feature points in the target area.
Step S12: and determining the landslide perimeter of the potential landslide object source according to the potential landslide perimeter characteristic points.
In an alternative embodiment, the potential landslide perimeter feature points are in a dispersed state, a plurality of dispersed potential landslide perimeter feature points are connected, and the formed closed area is a landslide perimeter of the potential landslide object source.
Step S13: and determining the width of the potential landslide object source and the forward slide length of the potential landslide object source according to the landslide perimeter of the potential landslide object source.
The potential landslide object source has a certain gradient, and the length of the potential landslide object source obtained in the embodiment of the invention along the sliding direction is not the length of the potential horizontal direction but the length along the inclination angle.
In an alternative embodiment, the width of the potential landslide object source and the forward length of the potential landslide object source may be measured by a range finder during a field survey, or may be obtained by analyzing a remote sensing image.
Step S14: and determining the area of the potential landslide object sources in the target area according to the width and width-to-length ratio of each potential landslide object source, wherein the width-to-length ratio of the potential landslide object sources is the ratio of the width of the potential landslide object source to the forward-sliding length of the potential landslide object source.
The method for calculating the area of the landslide object source provided by the embodiment of the invention determines the landslide perimeter of the potential landslide object source through the potential landslide perimeter characteristic points in the target area, thereby realizing the identification of the potential landslide object source, after the landslide perimeter of the potential landslide object source is identified, the parameter information of the potential landslide object source can be rapidly acquired, namely the width of the potential landslide object source and the length of the potential landslide object source in the forward sliding direction, and the calculation of the area of the potential landslide object source is realized based on the width and width-length ratio of the potential landslide object source, so that the area of the potential landslide object source can be accurately calculated by the embodiment of the invention, in addition, when the method and the device are executed to calculate the area of the potential landslide object source, the influence of rock soil materials and landslide inducement in the target area is avoided, and the method and the device are suitable for calculating the area of the potential landslide object source with different rock soil materials and different inducements. In addition, in the method for calculating the area of the landslide object source provided by the embodiment of the invention, the obtained area of the potential landslide object source is closer to the actual area by determining the area of the potential landslide object source in the target region according to the ratio of the width to the width of the potential landslide object source and the length of the potential landslide object source in the forward sliding direction, which are considered to be overestimated, and the calculation method provided by the embodiment of the invention is simpler.
In an optional embodiment, the potential landslide perimeter feature points include a terrain swelling feature point and a terrain staggered segment deformation feature point, and the step S12 specifically includes:
and determining a closed area formed by communicating the terrain swelling characteristic points and the terrain staggered section deformation characteristic points in the target area as a landslide perimeter of the potential landslide source.
In an optional embodiment, normal terrain and swelling terrain in the target area can be identified through point cloud data or image data of the target area, and a contact point of the fault terrain and the downhill normal terrain is determined as a swelling feature point.
In an alternative embodiment, creep of the potential landslide stretches cracks at the rear edge and the periphery of the landslide object source, some cracks stretch to be long to form through cracks, some cracks stretch to be short to form a goose-rowed type arrangement of cracks, the cracks in the target area are identified through point cloud data or image data of the target area, and the crack distribution points at the rear edge and the periphery of the potential landslide object source are regarded as terrain fault section deformation characteristic points.
In an alternative embodiment, in the area where the sliding is to be generated, the rear edge and the left and right sides of the landslide object source are provided with deformation characteristics of discontinuous terrain staggered sections, the front edge of the landslide object source is provided with terrain bulging characteristics, the positions where the terrain characteristics appear are peripheral characteristic points of the potential landslide object source, the landslide periphery of the potential landslide object source can be obtained approximately by connecting the terrain bulging characteristics, and the landslide periphery is also an area where the landslide will slide, so that the width and the length of the potential landslide object source can be measured or extracted according to the landslide periphery.
In an optional embodiment, if the target area is large, there is a case where multiple potential landslide object sources exist in one target area, and at this time, different potential landslide perimeter feature points in the target area may belong to different potential landslide object sources, in the embodiment of the present invention, when determining the landslide perimeter of a potential landslide object source:
firstly, determining a plurality of terrain heave characteristic points, wherein the included angle between a straight line formed by the plurality of terrain heave characteristic points and the smooth direction of the landslide is within a preset range (exemplarily, the included angle can be 90 degrees +/-20 degrees within the preset range);
then, determining a plurality of first terrain staggered section deformation characteristic points adjacent to a connecting line of the terrain heave characteristic points along the smooth direction of the landslide, wherein an included angle between a straight line formed by the first terrain staggered section deformation characteristic points and the smooth direction of the landslide is within a preset range (for example, the included angle can be 90 degrees +/-20 degrees within the preset range), and the altitude of the first terrain staggered section deformation characteristic points is higher than that of the terrain heave characteristic points;
and finally, determining second terrain staggered section deformation characteristic points on two sides of a straight line formed by the terrain heave characteristic points and a straight line formed by the first terrain staggered section deformation characteristic points, connecting the straight line formed by the terrain heave characteristic points, the straight line formed by the first terrain staggered section deformation characteristic points and the second terrain staggered section deformation characteristic points on two sides to form a communication area, and determining the communication area as the landslide perimeter of the potential landslide source.
In an alternative embodiment, the potential landslide source area is calculated by the following formula:
wherein A isLThe area of the potential landslide object source, W the width of the potential landslide object source, L the length of the potential landslide object source in the forward direction, pi the circumference value, epsilon the width-length ratio of the potential landslide object source,
in an optional embodiment, the method for calculating a source area of a landslide object provided in the embodiment of the present invention further includes:
firstly, the width of each landslide object source in the target area and the length of each landslide object source in the forward sliding direction are obtained.
The landslide object sources are parts which slide in the landslide, the peripheries of the landslide object sources are communicated, the width of each landslide object source and the length of each landslide object source in the forward sliding direction can be extracted according to remote sensing images, and the width of each landslide object source and the length of each landslide object source in the forward sliding direction can be measured and obtained through a distance meter in the field investigation process.
And then determining the area of the landslide object source of each landslide object source in the target area according to the width and the width-length ratio of each landslide object source, wherein the width-length ratio of the landslide object source is the ratio of the width of the landslide object source to the forward sliding length of the landslide object source.
In an alternative embodiment, the landslide source area is calculated by the following formula:
at this time, ALIs the area of the landslide source, W is the width of the landslide source, L is the length of the landslide source in the forward sliding direction, pi is a circumference value, epsilon is the width-length ratio of the landslide source,
and finally, determining the total area of the landslide object sources in the target area according to the area of the potential landslide object sources in the target area and the area of each landslide object source.
The sum of the potential landslide source area for each potential landslide source within the target area and the landslide source area for each landslide source is the total landslide source area within the target area.
In order to verify that the method for calculating the source area of the landslide object provided by the embodiment of the invention can more accurately calculate the source area of the landslide object and is not influenced by rock-soil body conditions and induction conditions when calculating the source area of the landslide object, the embodiment of the invention takes four landslide databases as an example to perform verification and error analysis:
and 5, verifying by using a Tibetan southeast landslide database, wherein the database comprises 5556 landslides. Landslide source surface elements are jointly interpreted through satellite data such as GF-2, Google Earth, Landsat-8 and the like. The total area of the landslide source reaches 270.35km2About 1.59 percent of the area of the research area, including 67 soil landslides and 5489 rock landslides, and the maximum landslide source area of the research area is 925.21 multiplied by 104m2The minimum landslide source area is 24.55m2. Extracting the width, length and area of each landslide source through space analysis software, and using a formula
The source area of the landslide object is calculated, and comparison and error analysis are performed, wherein comparison results and error analysis results are shown in fig. 2 and fig. 3.
The maximum landslide object source area calculated by the embodiment of the invention is 0.83km2The area of interpretation differs by-10.32% from the actual area of interpretation of landslide. The minimum landslide source area calculated by the embodiment of the invention is 24.97m2The area of interpretation from landslide differs only by 1.72%. The estimated area of the landslide source and the interpreted area are placed in fig. 2 and a linear regression is performed, resulting in a regression line with a slope of 0.9652 and R-square of 0.9933. The slope of the regression line shows that the results calculated by the inventive example are very consistent with the interpretation results. For 5556 landslides, the total interpreted area of the landslide source was 270.35km2From the formula
The calculated estimated total area was 274.66km2The difference between the two is only 1.59%.
As shown in fig. 3, the error concentration calculated by the method provided by the embodiment of the present invention is distributed in the range of 19.88% to-14.41%. The estimation error of 56% of the landslide source area in the landslide catalog is between-5% and 5%; the error of the estimation result of 85% of landslide is between-10% and 10%; and the error of the estimation result of 95% is between-15% and 15%; the remaining fraction (5% landslide) has an error of more than 15%. Further, 61% of the landslide source estimation errors in the landslide catalog are positive, and the remaining 49% of the landslide estimation errors are negative. The error range of this error is considered acceptable considering the large number of landslides in the landslide catalog.
The embodiment of the invention adds 3 landslide databases to continuously verify that the method provided by the embodiment of the invention is not influenced by rock and soil mass conditions and induction conditions, and the landslide catalogues for verification are respectively as follows: in 2008 (Mw7.9) Wenchuan earthquake, 205 landslide groups interpreted by the shone town of the Zhongzhong region; in 2014 (Ms6.5), the Ludian earthquake consists of 190 landslides; and (3) the selected 104 object sources in the landslide dense area of the loess plateau are clearly bounded on the landslide. The landslide in the 3 databases was developed under different geotechnical conditions and induced by different conditions. Using the formula
The estimated source area for each landslide in the 3 databases was calculated and its error was calculated and the maximum, minimum and mean values of its error were put in the same graph as the landslide data in figure 2, as shown in figure 4.
As can be seen from fig. 4, the range of the source estimation error distribution of 4 landslides is substantially the same, i.e., -0.15 to 0.2. Furthermore, the average error of these four landslide projects was only 0.024, -0.003, 0.042, and-0.003, respectively, indicating the accuracy of the source area of the landslide obtained by performing the method provided by the above example. It is worth noting that the 4 landslide cataloged error distributions reflect that the correlation between the source area of the landslide source region calculated by the method and the rock-soil body condition and the inducing condition of the landslide is not large. This shows that the method provided by the above embodiment is not only suitable for landslides of different substances, but also suitable for landslides of different causes.
An embodiment of the present invention provides a device for calculating a source area of a landslide object, as shown in fig. 5, including:
the perimeter feature point determining module 21 is configured to determine a potential landslide perimeter feature point in the target area, for details, refer to the description of step S11 in the foregoing embodiment, and are not described herein again.
The landslide perimeter determining module 22 is configured to determine a landslide perimeter of the potential landslide object source according to each potential landslide perimeter feature point, for details, refer to the description of step S12 in the foregoing embodiment, and are not described herein again.
The perimeter parameter determining module 23 is configured to determine a width of the potential landslide object source and a length of the potential landslide object source in a forward direction according to a landslide perimeter of the potential landslide object source, for details, refer to the description of step S13 in the foregoing embodiment, and are not described herein again.
The potential landslide object source area calculation module 24 is configured to determine the potential landslide object source area in the target area according to the width and width-to-length ratio of each potential landslide object source, where the width-to-length ratio of a potential landslide object source is a ratio of the width of the potential landslide object source to the forward sliding length of the potential landslide object source, and the details refer to the description of step S14 in the foregoing embodiment, and are not described herein again.
In an optional embodiment, the potential landslide perimeter feature points include a terrain swelling feature point and a terrain staggered section deformation feature point, and the landslide perimeter determination module 22 is specifically configured to determine a closed area formed by communicating the terrain swelling feature point and the terrain staggered section deformation feature point in the target area as a landslide perimeter of the potential landslide object source.
In an alternative embodiment, in the device for calculating the area of the landslide object source provided by the embodiment of the present invention, the area of the potential landslide object source is calculated by the following formula:
wherein A isLThe area of the potential landslide object source, W the width of the potential landslide object source, L the length of the potential landslide object source in the forward direction, pi the circumference value, epsilon the width-length ratio of the landslide object source,
in an optional embodiment, the apparatus for calculating a source area of a landslide object according to an embodiment of the present invention further includes:
the landslide object source parameter obtaining module is configured to obtain a width of each landslide object source and a length of each landslide object source in the target area in the forward direction, and for details, reference is made to the description in the above method embodiment, and details are not described here again.
And the landslide object source area determining module is used for determining the landslide object source area of each landslide object source in the target area according to the width and the width-to-length ratio of each landslide object source, wherein the width-to-length ratio of the landslide object source is the ratio of the width of the landslide object source to the length of the landslide object source in the forward sliding direction, and the detailed content refers to the description in the method embodiment and is not repeated herein.
And a total landslide object source area determining module, configured to determine a total landslide object source area in the target region according to the potential landslide object source area in the target region and the area of each landslide object source, for details, refer to the description in the foregoing method embodiment, and details are not described here again.
An embodiment of the present invention provides a computer device, as shown in fig. 6, the computer device mainly includes one or more processors 31 and a memory 32, and one processor 31 is taken as an example in fig. 6.
The computer device may further include: an input device 33 and an output device 34.
The processor 31, the memory 32, the input device 33 and the output device 34 may be connected by a bus or other means, and fig. 6 illustrates the connection by a bus as an example.
The processor 31 may be a Central Processing Unit (CPU). The Processor 31 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The memory 32 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created from use of the computing device of the landslide source area, and the like. Further, the memory 32 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, the memory 32 may optionally include memory located remotely from the processor 31, which may be connected to a landslide source area computing device via a network. The input device 33 may receive a calculation request (or other numeric or character information) input by a user and generate a key signal input related to the calculation device of the landslide source area. The output device 34 may include a display device such as a display screen for outputting the calculation result.
An embodiment of the present invention provides a computer-readable storage medium, where the computer-readable storage medium stores computer instructions, and the computer-readable storage medium stores computer-executable instructions, where the computer-executable instructions may execute the method for calculating the source area of the landslide object in any of the above method embodiments. The storage medium may be a magnetic Disk, an optical Disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a Flash Memory (Flash Memory), a Hard Disk (Hard Disk Drive, abbreviated as HDD) or a Solid State Drive (SSD), etc.; the storage medium may also comprise a combination of memories of the kind described above.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. This need not be, nor should it be exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (10)
1. A method for calculating the source area of a landslide object is characterized by comprising the following steps:
determining potential landslide perimeter feature points in a target area;
determining the landslide perimeter of the potential landslide object source according to each potential landslide perimeter characteristic point;
determining the width of the potential landslide object source and the length of the potential landslide object source in the forward sliding direction according to the landslide perimeter of the potential landslide object source;
determining the area of the potential landslide object sources in the target area according to the width and the width-to-length ratio of each potential landslide object source, wherein the width-to-length ratio of the potential landslide object sources is the ratio of the width of the potential landslide object sources to the forward-sliding length of the potential landslide object sources.
2. The landslide object source area calculation method of claim 1 wherein the potential landslide perimeter feature points comprise terrain heave feature points and terrain staggered segment deformation feature points,
determining a landslide perimeter of a potential landslide object source from each of the potential landslide perimeter feature points comprises:
and determining a closed area formed by communicating the terrain swelling characteristic points and the terrain staggered section deformation characteristic points in the target area as a landslide perimeter of the potential landslide object source.
3. The method of calculating a landslide source area of claim 1, wherein the potential landslide source area is calculated by the formula:
wherein, ALThe area of the potential landslide object source, W the width of the potential landslide object source, L the length of the potential landslide object source in the forward direction, pi the circumference value, epsilon the width-length ratio of the potential landslide object source,
4. the landslide source area calculation method of any one of claims 1-3 further comprising:
acquiring the width of each landslide object source in a target area and the length of each landslide object source in the forward sliding direction;
determining the area of each landslide object source in the target area according to the width and width-length ratio of each landslide object source, wherein the width-length ratio of the landslide object source is the ratio of the width of the landslide object source to the forward-sliding length of the landslide object source;
and determining the total area of the landslide source in the target area according to the area of the potential landslide source in the target area and the area of each landslide source.
5. A landslide source area calculation device comprising:
the peripheral characteristic point determining module is used for determining potential landslide peripheral characteristic points in the target area;
the landslide perimeter determining module is used for determining the landslide perimeter of the potential landslide object source according to each potential landslide perimeter characteristic point;
the perimeter parameter determining module is used for determining the width of the potential landslide object source and the forward sliding length of the potential landslide object source according to the landslide perimeter of the potential landslide object source;
and the potential landslide object source area calculation module is used for determining the potential landslide object source area in the target area according to the width and width-to-length ratio of each potential landslide object source, wherein the width-to-length ratio of the potential landslide object source is the ratio of the width of the potential landslide object source to the forward sliding length of the potential landslide object source.
6. The landslide source area calculation device according to claim 5, wherein the potential landslide perimeter feature points comprise terrain heave feature points and terrain staggered segment deformation feature points,
the landslide perimeter determination module is specifically used for determining a closed area formed by communicating the terrain swelling characteristic points and the terrain staggered section deformation characteristic points in the target area as a landslide perimeter of the potential landslide source.
7. The landslide source area calculation device of claim 5 wherein said potential landslide source area is calculated by the formula:
wherein A isLThe area of the potential landslide object source, W the width of the potential landslide object source, L the length of the potential landslide object source in the forward direction, pi the circumference value, epsilon the width-length ratio of the landslide object source,
8. the landslide source area calculation device of any one of claims 5-7 further comprising:
the landslide object source parameter acquisition module is used for acquiring the width of each landslide object source in the target area and the length of each landslide object source in the forward sliding direction;
a landslide object source area determination module, configured to determine a landslide object source area of each landslide object source in the target area according to a width and a width-to-length ratio of each landslide object source, where the width-to-length ratio of the landslide object source is a ratio of the width of the landslide object source to a forward-sliding length of the landslide object source;
and the total landslide source area determining module is used for determining the total landslide source area in the target area according to the potential landslide source area in the target area and the landslide source areas.
9. A computer device, comprising:
at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to perform the method of landslide source area calculation of any one of claims 1-4.
10. A computer-readable storage medium storing computer instructions for causing a computer to perform the method of calculating a landslide source area according to any one of claims 1-4.
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