CN103472497B - Raceway groove start type debris flow occurrence scale calculation method and application - Google Patents
Raceway groove start type debris flow occurrence scale calculation method and application Download PDFInfo
- Publication number
- CN103472497B CN103472497B CN201310373672.2A CN201310373672A CN103472497B CN 103472497 B CN103472497 B CN 103472497B CN 201310373672 A CN201310373672 A CN 201310373672A CN 103472497 B CN103472497 B CN 103472497B
- Authority
- CN
- China
- Prior art keywords
- debris flow
- flow
- value
- formation region
- formula
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000004364 calculation method Methods 0.000 title claims abstract description 25
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 87
- 238000000034 method Methods 0.000 claims abstract description 25
- 230000000977 initiatory effect Effects 0.000 claims abstract description 17
- 239000011435 rock Substances 0.000 claims description 17
- 238000011835 investigation Methods 0.000 claims description 11
- 238000000354 decomposition reaction Methods 0.000 claims description 10
- 238000012544 monitoring process Methods 0.000 claims description 7
- 239000010430 carbonatite Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 1
- 210000000158 ommatidium Anatomy 0.000 description 16
- 230000000694 effects Effects 0.000 description 7
- 238000013456 study Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 230000003628 erosive effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- RVRCFVVLDHTFFA-UHFFFAOYSA-N heptasodium;tungsten;nonatriacontahydrate Chemical compound O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.O.[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[Na+].[W].[W].[W].[W].[W].[W].[W].[W].[W].[W].[W] RVRCFVVLDHTFFA-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013480 data collection Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000012067 mathematical method Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012876 topography Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a kind of debris flow occurrence scale calculation method.Scale calculation method of breaking out for raceway groove start type rubble flow in prior art need defect based on long-term rubble flow observation data, the invention provides a kind of debris flow occurrence scale calculation method, the core of the method is with the Debris flow initiation critical value Cr measuring method of debris flow gully road landform, geology, hydrology factor expression and with the debris flow scale measuring method of this critical value Cr expression.This method first with monitored area Cr value for monitor value, when Cr >=0.35, judge exist rubble flow cause danger go forward side by side one pacing calculate break out scale.The inventive method is simultaneously that common monitor value judges causing danger property of rubble flow with 1h rainfall amount I with optimal conditions.The inventive method principle is reliable, and threshold value measuring and calculating more meets debris flow formation mechanism; Threshold value measuring and calculating, not based on long-term observation data, has stronger applicability of taking precautions against natural calamities.
Description
Technical field
The present invention relates to a kind of debris flow occurrence scale calculation method, particularly relate to a kind of raceway groove start type debris flow occurrence scale calculation method and application thereof, belong to debris flow control works field.
Background technology
Raceway groove is the gallery that a kind of gradient is steep, suffer intermittent flood erosion.After slope runoff produces, along direction, slope continuing to increase along with the rainfall runoff amount of collecting, form discharge per unit width and all very large mountain torrents of flow velocity.Groove channel erosion refers to be concentrated erosion soil and parent rock by slope runoff and cuts this etching pattern that ground forms larger gully.In raceway groove, bulk materials solid is abundanter, and when bulk solid mass climate, environment, Hydrological Effects produce and lifted or revealed the inside story, then cause rubble flow to start, this type of rubble flow is called raceway groove start type rubble flow.
Debris flow scale be state of debris flow disasters consequence want index most.The scale of rubble flow can represent with runoff and sediment total amount or crest discharge, and the former is more general.The factor affecting debris flow scale comprises loose material reserves, topography and landform character etc. in the drainage characteristics of rubble flow, channel features, basin, the ultimate principle of existing debris flow scale prediction measuring method is consistent, all in these factor effects of consideration and interactional basis, relevant mathematical method is used to build mathematical model, relend and help computer programming, set up the relation between predictive variable and predicted value, feasible region debris flow scale calculation.The technological deficiencies such as it is longer that these methods exist data collection cycle mostly, relates to parameter more, and desired data is difficult to gather, the more difficult realization of research.
Summary of the invention
Object of the present invention is exactly for the deficiencies in the prior art, a kind of debris flow early-warning method is provided, the core of the method is based on the formation mechenism of rubble flow, calculates the method for the rubble flow generation critical excitation approaches threshold value of set rubble flow raceway groove according to catchment basin of debris flow landform, geology, the hydrology factor.
For achieving the above object, technical scheme of the present invention is as follows:
A kind of debris flow occurrence scale calculation method, is characterized in that: implement with following steps:
Step S1, basic survey are measured
The debris flow formation region scope in rubble flow raceway groove is determined in investigation, with described debris flow formation region for monitored area,
Monitored area is determined in investigation measurement: debris flow formation region ditch bed longitudinal river slope J, forming region drainage area A
0, the long L of debris flow formation region raceway groove, tectonic faults, seismic intensity, physical weathering, decomposition decay, rock characteristic,
Consult hydrologic manual and determine monitored area: rubble flow raceway groove average annual rainfall R
0, rubble flow raceway groove 10min rainfall variation coefficient C
v,
Placement sensor is measured in real time: rainfall B, 1h rainfall amount I;
Step S2, causing danger property of measuring and calculating Debris flow initiation
With described monitored area Debris flow initiation critical value Cr for monitor value, judge causing danger property of rubble flow according to monitor value size;
Causing danger property of rubble flow Rule of judgment is: when Cr >=0.35, judges that there is rubble flow causes danger;
Described critical value Cr determines according to formula 1;
In formula, Cr---early warning and monitoring region Debris flow initiation critical value,
J---debris flow formation region ditch bed longitudinal river slope, step S1 determines,
F---debris flow formation region shape coefficient, determines according to formula 2,
A---debris flow formation region relative area, determines according to formula 3,
R*---equivalent rainfall amount, mm, determines according to formula 4,
R
0---rubble flow raceway groove average annual rainfall, mm, step S1 determines,
C
v---rubble flow raceway groove 10min rainfall variation coefficient, step S1 determines,
C
1---the debris flow formation region tectonic faults factor, according to table 1 value,
C
2---the debris flow formation region seismic intensity factor, according to table 1 value,
C
3---the debris flow formation region physical weathering factor, according to table 1 value,
C
4---the debris flow formation region decomposition decay factor, according to table 2 value,
F
0---debris flow formation region rock consolidating coefficient, according to table 3 value;
Table 1C
1, C
2, C
3assignment table
Table 2C
4assignment table
Carbanion CO
3 2-content refers to the CO in the carbonatite of debris flow formation region
3 2-content
Table 3F
0assignment table
#——C
3＝1
*——C
1＝1，C
2＝1，C
3＝1，C
4＝1
In formula, A
0---debris flow formation region drainage area, km
2, step S1 determines,
L---debris flow formation region raceway groove is long, km, and step S1 determines;
In formula, A
0---debris flow formation region drainage area, km
2, step S1 determines,
A---unit area, value 1km
2;
R*=(B+12.5I) formula 4
In formula, B---rainfall, mm, step S1 determines,
I---1h rainfall amount, mm, step S1 determines;
Step S3, measuring and calculating debris flow occurrence scale
When described rubble flow raceway groove exist rubble flow cause danger time, measuring and calculating debris flow occurrence scale V value, described V value is determined according to formula 5 calculating:
V=0.07A
0r
0c
v(e
2Cr-2) formula 5
In formula, V---debris flow occurrence scale, m
3
A
0---debris flow formation region drainage area, m
2, step S1 determines,
R
0---rubble flow raceway groove average annual rainfall, m, step S1 determines,
E---natural constant.
The debris flow occurrence scale of above-mentioned debris flow occurrence scale calculation method measuring and calculating refers to the overall accumulated amount of rubble flow.The ultimate principle of measuring method is based on two parts: one is the know-why relating to causing danger property of Debris flow initiation measuring and calculating in set raceway groove in step S2, two is determining that set raceway groove exists rubble flow and causes danger under condition, to the know-why of debris flow occurrence scale calculation method in step S3.
The ultimate principle that step S2 relates to the measuring and calculating of causing danger property of rubble flow is: the formation of rubble flow is determined by the topographic condition of debris flow formation region, geologic condition and precipitation condition, and three conditions are indispensable, form rubble flow under acting in conjunction.This early warning principle is the combined action considering these three conditions, and the critical condition of formation rubble flow that the effect of three conditions is united.Based on this principle, study through a large amount of field studys, analysis is determined for set rubble flow raceway groove, determining on the scope of debris flow formation region, early warning and monitoring region Debris flow initiation critical value Cr and debris flow formation region terrain factor (T), prime factor (G), the hydrology factor (R) triangular funtcional relationship express such as formula 6:
In formula 6, debris flow formation region terrain factor T determines according to formula 7, and ground, debris flow formation region prime factor G determines according to formula 8, and debris flow formation region hydrology factor R is determined according to formula 9.Particularly:
Debris flow formation region terrain factor T refers to the summation of the multiple factors about topographic condition being conducive to debris flow formation, take over the land for use shape to the contribution of debris flow formation in the factor following table that the shape coefficient, ditch bed longitudinal river slope, drainage area etc. of consideration debris flow formation region are relevant with debris flow formation, and its defining method is as follows:
T=FJA
0.2formula 7
In formula, J---debris flow formation region ditch bed longitudinal river slope, field survey is determined;
F---debris flow formation region shape coefficient, refers to the shape in basin, has larger impact, determine according to formula 2 runoff gathering forming rubble flow,
A---debris flow formation region relative area, refers to nondimensional drainage area, has larger impact, determine according to formula 3 runoff gathering of rubble flow and the generation in thing source.
Ground, debris flow formation region prime factor G refers to the summation of the multiple factors about geologic condition being conducive to debris flow formation, the contribution of the factor following table expropriation of land confrontation debris flow formation that the lithology in consideration debris flow formation region, tectonic faults, earthquake effect, physical weathering and decomposition decay etc. are relevant with debris flow formation, its defining method is as follows:
G=C
1c
2c
3c
4f
0formula 8
In formula, C
1for the tectonic faults factor, refer to that zone of fracture in debris flow formation region is on the impact in rubble flow thing source, C
2for the seismic intensity factor, refer to that earthquake in debris flow formation region is on the impact in rubble flow thing source, C
3for the physical weathering factor, refer to that physical weathering in debris flow formation region is on the impact in rubble flow thing source, this three is all according to table 1 value; C
4for the decomposition decay factor, refer to that decomposition decay in debris flow formation region is on the impact in rubble flow thing source, and on forming the impact at water source of rubble flow, according to table 2 value; F
0for basin, debris flow formation region firmness coefficient, refer to that hardness degree of rock in debris flow formation region is on the impact in rubble flow thing source, according to table 3 value.
The theoretical foundation of table 1 assignment is: the structure of debris flow formation region is educated all the more, and zone of fracture is more, and the rock in basin is more broken, and rubble flow thing source is more, is more conducive to the formation of rubble flow; The seismic activity of debris flow formation region is more, and the rock in basin is more broken, and rubble flow thing source is more, is more conducive to the formation of rubble flow; The physical weathering of debris flow formation region is stronger, and the rock in basin is more broken, and rubble flow thing source is more, is more conducive to the formation of rubble flow;
The theoretical foundation of table 2 assignment is: the decomposition decay of debris flow formation region is stronger, and the rock in basin is more broken, and rubble flow thing source is more, is more conducive to the formation of rubble flow; The decomposition decay of debris flow formation region is stronger, and the crack of the rock in basin is more, and runoff charge for remittance is fewer, is more unfavorable for the formation of rubble flow; Both combinations counteract part effect, and comprehensive exercising result is: decomposition decay is stronger, is more unfavorable for the formation of rubble flow;
The theoretical foundation of table 3 assignment is: the lithology of the rock of debris flow formation region is firmer, more easily forms avalanche, and the rubble flow solids source of formation is less, and rubble flow thing source particle is thick not easily carries, and is unfavorable for the formation of rubble flow; The lithology of the rock of debris flow formation region is weaker, more easily forms landslide, and the rubble flow solids source of formation is more, and particle tiny being easy in rubble flow thing source is carried, and is conducive to the formation of rubble flow.
Debris flow formation region hydrology factor R refers to the summation of the multiple factors about hydrologic condition being conducive to debris flow formation, considering to characterize the contribution of the hydrology to debris flow formation under the factor that rainfall, hourly rainfall depth, average annual rainfall, 10min rainfall variation coefficient etc. are relevant with debris flow formation, its defining method is as follows:
In formula, R
0rubble flow raceway groove average annual rainfall, C
vbe rubble flow raceway groove 10min rainfall variation coefficient, the two is all inquired about local hydrologic manual and determines; R* is equivalent rainfall amount, refers to the comprehensive interception rainfall index in conjunction with rainfall and hourly rainfall depth, determines according to formula 4.
Will with above formula 6 ~ formula 9 merge obtain formula 1, namely according to debris flow gully road terrain factor (T), prime factor (G), the hydrology factor (R) three tolerance early warning and monitoring region Debris flow initiation critical value Cr.The determination of Cr value has in the methods of the invention taken into full account that set rubble flow raceway groove three excites greatly the factor of debris flow formation, and the basis not having a large amount of Monitoring Data in earlier stage also can be determined the Critical Rainfall of this rubble flow raceway groove.When the rainfall of rubble flow raceway groove, by the rainfall B in Real-time Obtaining rainfall product data and 1h rainfall amount I, adopt said method in real time or short periodic endless calculate Cr value as monitoring index, generally speaking, the cycle calculations cycle of Cr value answers≤10min.Carry out condition distinguishing according to operation result: when Cr >=0.35, in raceway groove, rubble flow probability of happening is higher, there is causing danger property of Debris flow initiation.
Judge that the technical foundation of rubble flow possibility occurrence is by the threshold value 0.35 of above-mentioned Cr value: mass-send rubble flow event on a large scale by field study, by the judgment value of the landform of the catchment basin of debris flow broken out and do not break out, geology and hydrologic condition and calculating, determine, when Cr >=0.35, have certain play rubble flow to occur.By this judgment value in the rubble flow event in other areas, whether also can judge the generation of rubble flow well.
The ultimate principle that step S3 relates to debris flow occurrence scale calculation is: the area of catchment basin of debris flow is larger, and scale is larger; The average annual rainfall of catchment basin of debris flow is larger, and the variation coefficient of catchment basin of debris flow is larger, excites the rainfall of rubble flow also larger, and the scale of rubble flow is also larger; Excite the Cr value of rubble flow larger, rainfall is also larger, and the scale of rubble flow is also larger.Mass-send rubble flow event on a large scale by field study, utilize its data analysis to set up the relational expression broken out between scale V and variation.
For improving the accuracy of the measuring and calculating of Debris flow initiation danger and debris flow occurrence scale calculation, above-mentioned debris flow occurrence scale calculation method can be optimized, specifically: in step S2, with described survey region Debris flow initiation critical value Cr and 1h rainfall amount I value for monitor value, judge causing danger property of rubble flow according to monitor value size.When calculating Cr value, calculate according to formula 10 and determine corresponding 1h rainfall amount minimum value I
min:
I
min=R*/60 formula 10
I
min0.351h rainfall amount minimum value I during corresponding Cr=0.35
min;
Debris flow initiation Rule of judgment is: when Cr>=0.35 and I>=I
min0.35, judge that there is rubble flow causes danger, need measuring and calculating debris flow occurrence scale further.
Measuring method after optimization, only has in step sl and meets Cr simultaneously and exceed threshold value, and I>=I
mintime, the causing danger property of rubble flow could be judged.Judge that there is rubble flow causes danger under can avoiding the condition that hourly rainfall depth I is very little rainfall B is very large thus.
Debris flow occurrence scale calculation method through optimizing is when being applied to the rubble flow Occurrence forecast of set rubble flow raceway groove, and monitoring index is Cr value and the I value of constantly change under cycle calculations, and generally speaking, the cycle calculations cycle of Cr value, I value answers≤10min.
Based on the know-why of debris flow occurrence scale calculation provided by the invention, the inventive method is applied to ditch bed starting type Debris Flow and breaks out scale forecast and prevent and reduce natural disasters work.
Compared with prior art, the invention has the beneficial effects as follows: (1) for the measuring and calculating of debris flow occurrence scale consider simultaneously cause rubble flow geology, landform, the large factor of the hydrology three effect and influence each other, therefore results of measuring more meets debris flow formation mechanism; (2) for set rubble flow raceway groove, adopt a large amount of history observation datas that the inventive method measuring and calculating debris flow occurrence scale does not need rubble flow to occur, only need the terrain factor determining catchment basin of debris flow, ground prime factor and rainfall observation data, due to except the rubble flow research station that scientific research is arranged, overwhelming majority rubble flow raceway groove is all without the long-term observation data that rubble flow occurs, and therefore the present invention has higher applicability of taking precautions against natural calamities for debris flow early-warning.
Accompanying drawing explanation
Fig. 1 is embodiment one techniqueflow schematic diagram.
Fig. 2 is physical weathering C
3grade figure.
Embodiment
Below in conjunction with preferred embodiment, technical scheme of the present invention is further described.
Embodiment one
Fig. 1 is techniqueflow schematic diagram.Calculate three valley gully mud-rock flow Mud-stone Flow of Gullies by the inventive method and break out scale.
Step S1, basic survey are measured
County town, Zhouqu County, Gansu Province is based upon on the deposition fan of three Yu Gou and Luo Jia valley ditches, and wherein three valley ditches comprise Zhigou large eye valley ditch, ommatidium valley ditch, and the deposition fan of large eye valley ditch, ommatidium valley ditch has multiple village and modern architecture.Using large eye valley ditch, ommatidium valley ditch forming region as monitored area.Respectively survey and drawing of investigation, inquire about the following underlying parameter data that local hydrologic manual determines three valley ditches, ommatidium valley gully mud-rock flow forming region:
Large eye valley ditch: J=0.314, A
0=8.68km
2, L=4.11km, R
0=435.8mm, C
v=0.73; Ommatidium valley ditch: J=0.325, A
0=7.36km
2, L=3.94km, R
0=435.8mm, C
v=0.73.
Above underlying parameter data J, A
0, L substitutes into formula 2, formula 3 respectively, calculating is determined: large eye valley ditch: F=0.513, A=8.68; Ommatidium valley ditch: F=0.474, A=7.36.
Through investigation, large eye valley ditch and ommatidium valley gully mud-rock flow forming region are ls, and have 1 zone of fracture to pass through in forming region, local seismic intensity is VIII degree, and average temperature of the whole year is 4.2 DEG C, and average rainfall is 435.8mm, and ls content is very high.The table of comparisons 1, table 2, table 3 and Fig. 2 determine the parameter of large eye valley ditch and ommatidium valley ditch: F
0=10, C
1=0.96, C
2=0.93, C
3=0.96, C
4=1.2.
Step S2, causing danger property of measuring and calculating Debris flow initiation
On June 4th, 1992 and on August 7th, 2010, all there is larger rainfall in large eye valley ditch and ommatidium valley ditch, obtains the real-time rainfall data of forming region by rain gage.Repeatedly rainfall B, in real time 1h rainfall amount I are substituted into formula 4 and calculate equivalent rainfall amount R*, and equivalent rainfall amount R* substitution formula 10 is obtained I
min0.35, and real-time equivalent rainfall amount R* and above each parameter are substituted into formula 1 calculate Debris flow initiation critical value Cr, and contrast I value now and I
minvalue.
Calculating is determined, on June 4th, 1992, and large eye valley ditch: as R*=472mm, I
min0.35=7.9mm, Cr=0.35, if now I>=7.9mm, judge that there is rubble flow in the ditch of large eye valley causes danger; At ommatidium valley ditch: during as R*=479mm, I
min0.35=8.0mm, Cr=0.35, if now I>=8.0mm, judge that there is rubble flow in the ditch of ommatidium valley causes danger.
Step S3, measuring and calculating debris flow occurrence scale
Respectively large eye valley ditch, ommatidium valley ditch parameter are substituted into formula 5, calculating is determined: the rubble flow that on August 7th, 2010, three valley ditches broke out calculates scale and is: large ditch V=52.6 × 10, eye valley
4m
3, ditch V=44.1 × 10, ommatidium valley
4m
3, three valley ditches add up to V=96.7 × 10
4m
3.Three valley gully mud-rock flows broke out scale calculated amount and were on June 4th, 1992: large ditch V=11.9 × 10, eye valley
4m
3, ditch V=9.9 × 10, ommatidium valley
4m
3, three valley ditches add up to V=21.8 × 10
4m
3.
According to history enquiry data, the actual debris flow scale broken out of three valley ditches on August 7th, 2010 is: large ditch V=73.2 × 10, eye valley
4m
3, ditch V=35.3 × 10, ommatidium valley
4m
3, ditch V=108.5 × 10, three valleys
4m
3.The actual debris flow scale broken out of three valley ditches on June 4th, 1992: large ditch V=10.6 × 10, eye valley
4m
3, ditch V=16.4 × 10, ommatidium valley
4m
3, ditch V=27.0 × 10, three valleys
4m
3.
Factual survey data show, and the debris flow scale that three valley ditches break out on August 7th, 2010 is more than 3 times of debris flow scale broken out on June 4th, 1992; The results of measuring of measuring method of the present invention be too on August 7th, 2010 rubble flow be June in 1992 debris flow scale on the 4th more than 3 times.To calculate and comparative result shows: 1) rubble flow calculates the difference having about 30% between scale and investigation scale, such difference range is that (field investigation due to debris flow scale exists some uncertain factors to acceptable in the electric powder prediction of disaster prevention, therefore enquiry data is not considered to debris flow scale data very accurately in field, and is considered to acceptable scale data.And because field investigation method step maturation, convenient operation, result are stablized, also therefore as the important references reference point of correlative study in field); 2) carry out independence measuring and calculating and independent investigation to two debris flow scale in the present embodiment, between measuring and calculating value and investigation value, difference range is stablized, and illustrates that the inventive method is used for debris flow scale results of measuring and has stability, in engineering practice, has applicability.
Claims (4)
1. a debris flow occurrence scale calculation method, is characterized in that: implement with following steps:
Step S1, basic survey are measured
The debris flow formation region scope in rubble flow raceway groove is determined in investigation, with described debris flow formation region for monitored area,
Monitored area is determined in investigation measurement: debris flow formation region ditch bed longitudinal river slope J, debris flow formation region drainage area A
0, the long L of debris flow formation region raceway groove, the tectonic faults factor, the seismic intensity factor, the physical weathering factor, the decomposition decay factor, rock characteristic,
Consult hydrologic manual and determine monitored area: rubble flow raceway groove average annual rainfall R
0, rubble flow raceway groove 10 minutes rainfall variation coefficient C
v,
Placement sensor is measured in real time: rainfall B, 1 hourly rainfall depth I;
Step S2, causing danger property of measuring and calculating Debris flow initiation
With described monitored area Debris flow initiation critical value Cr for monitor value, judge causing danger property of rubble flow according to monitor value size;
Causing danger property of rubble flow criterion is: when Cr >=0.35 judges that there is rubble flow causes danger;
Described critical value Cr determines according to formula 1:
In formula, Cr---early warning and monitoring region Debris flow initiation critical value,
J---debris flow formation region ditch bed longitudinal river slope, step S1 determines
F---debris flow formation region shape coefficient, determines according to formula 2,
A---debris flow formation region relative area, determines according to formula 3,
R*---equivalent rainfall amount, mm, determines according to formula 4,
R
0---rubble flow raceway groove average annual rainfall, mm, step S1 determines,
C
v---rubble flow raceway groove 10 minutes rainfall variation coefficient, step S1 determines,
C
1---the debris flow formation region tectonic faults factor, according to table 1 value,
C
2---the debris flow formation region seismic intensity factor, according to table 1 value,
C
3---the debris flow formation region physical weathering factor, according to table 1 value,
C
4---the debris flow formation region decomposition decay factor, according to table 2 value,
F
0---debris flow formation region rock consolidating coefficient, according to table 3 value;
Table 1:C
1, C
2, C
3assignment table
Table 2:C
4assignment table
Carbanion CO
3 2-content refers to the CO in the carbonatite of debris flow formation region
3 2-content
Table 3:F
0assignment table
Table 3 continued
#——C
3＝1
*——C
1＝1，C
2＝1，C
3＝1，C
4＝1
In formula, A
0---debris flow formation region drainage area, km
2, step S1 determines,
L---debris flow formation region raceway groove is long, km, and step S1 determines;
In formula, A
0---debris flow formation region drainage area, km
2, step S1 determines,
A---unit area, value 1km
2;
R*=B+12.5I formula 4
In formula, B---rainfall, mm, step S1 determines,
I---1 hourly rainfall depth, mm, step S1 determines;
Step S3, measuring and calculating debris flow occurrence scale
When described rubble flow raceway groove exist rubble flow cause danger time, measuring and calculating debris flow occurrence scale V value, described V value is determined according to formula 5 calculating:
V=0.07A
0r
0c
v(e
2Cr-2) formula 5
In formula, V---debris flow occurrence scale, m
3,
A
0---debris flow formation region drainage area, m
2, step S1 determines,
R
0---rubble flow raceway groove average annual rainfall, m, step S1 determines,
E---natural constant.
2. method according to claim 1, is characterized in that: in step S2, with described monitored area Debris flow initiation critical value Cr and 1 hourly rainfall depth I value for monitor value, judges causing danger property of rubble flow according to monitor value size;
Described causing danger property of rubble flow criterion is: when Cr>=0.35 and I>=I
min0.35, judge that there is rubble flow causes danger;
Described I
min0.35i corresponding when being Cr=0.35
minvalue, I
minvalue calculates according to formula 10 to be determined:
I
min=R*/60 formula 10.
3. debris flow occurrence scale calculation method according to claim 1 and 2, is characterized in that: each monitor value of cycle calculations, cycle calculations cycle≤10 minutes.
4. the application of debris flow occurrence scale calculation method according to claim 1 and 2, is characterized in that: be applied to ditch bed starting type Debris Flow and break out scale calculation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310373672.2A CN103472497B (en) | 2013-08-23 | 2013-08-23 | Raceway groove start type debris flow occurrence scale calculation method and application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310373672.2A CN103472497B (en) | 2013-08-23 | 2013-08-23 | Raceway groove start type debris flow occurrence scale calculation method and application |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103472497A CN103472497A (en) | 2013-12-25 |
| CN103472497B true CN103472497B (en) | 2016-01-06 |
Family
ID=49797414
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310373672.2A Expired - Fee Related CN103472497B (en) | 2013-08-23 | 2013-08-23 | Raceway groove start type debris flow occurrence scale calculation method and application |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103472497B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105740618B (en) * | 2016-01-28 | 2018-10-26 | 成都理工大学 | Rainfall dividing method for the prediction of ditch bed start type mud-rock flow |
| CN106192864B (en) * | 2016-07-19 | 2018-06-22 | 成都理工大学 | A kind of dangerous division methods of Debris Flow and its application |
| CN106157541B (en) * | 2016-07-19 | 2018-08-21 | 成都理工大学 | A kind of Debris Flow method for early warning and its application |
| CN106157544B (en) * | 2016-08-08 | 2019-06-18 | 成都理工大学 | The monitoring and pre-alarming method and device of gully type mud-rock flow |
| CN110738378B (en) * | 2019-10-31 | 2023-09-12 | 黄淮学院 | Prediction method and prediction system for debris flow disasters in mountain area |
| CN112907903B (en) * | 2021-03-18 | 2022-06-24 | 中国地质科学院探矿工艺研究所 | Debris flow early warning method combining mud level monitoring and refined terrain measurement |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169617A (en) * | 2011-04-15 | 2011-08-31 | 中国科学院水利部成都山地灾害与环境研究所 | Early warning method of mud-rock flow used in regions short of rainfall data |
-
2013
- 2013-08-23 CN CN201310373672.2A patent/CN103472497B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102169617A (en) * | 2011-04-15 | 2011-08-31 | 中国科学院水利部成都山地灾害与环境研究所 | Early warning method of mud-rock flow used in regions short of rainfall data |
Non-Patent Citations (4)
| Title |
|---|
| 《A formation model for debris flows in the Chenyulan River Watershed,Taiwan》;Bin Yu et al.;《Nat Harzards》;20130323;第68卷(第2期);第745-762页 * |
| 《强震区群发性沟谷型泥石流地形因子研究》;李丽;《中国优秀硕士学位论文全文数据库 基础科学辑》;20130315(第03期);第7-64页 * |
| 《沟谷型泥石流形成的风化因子研究》;褚胜名;《中国优秀硕士学位论文全文数据库 基础科学辑》;20130215(第02期);第15-42页 * |
| 《泥石流流域岩性的坚固系数与暴发频率的关系》;鲁科等;《地球科学进展》;20110930;第26卷(第9期);第980-988页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103472497A (en) | 2013-12-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103473892B (en) | Raceway groove start type rubble flow prediction occurring method and application | |
| CN103472497B (en) | Raceway groove start type debris flow occurrence scale calculation method and application | |
| CN103743441B (en) | The polynary of a kind of side slope safety is coupling in line monitoring system and method | |
| Wei et al. | Estimating the rainfall threshold of a deep-seated landslide by integrating models for predicting the groundwater level and stability analysis of the slope | |
| Hancock et al. | Medium-term erosion simulation of an abandoned mine site using the SIBERIA landscape evolution model | |
| CN106157541B (en) | A kind of Debris Flow method for early warning and its application | |
| CN104318103A (en) | Landslide hazard monitoring and early warning rainfall threshold judging method | |
| CN106593526B (en) | A kind of tunnel geology karst methods of risk assessment based on fuzzy Judgment | |
| CN110703360A (en) | Three-dimensional effect model for landslide prediction based on rainfall intensity and threshold value | |
| CN105761436A (en) | Red bed region landslide early warning method and application thereof | |
| CN105654398A (en) | Side slope construction assessment method based on centesimal system and multistage index system | |
| CN107091085B (en) | Multi-parameter discrimination method for stratum stability of shallow-buried and underground-excavated tunnel | |
| CN113505977A (en) | Method and device for designing evaluation system for influence of geological disasters on safety of existing bridge | |
| CN107545329A (en) | A kind of Based on Red Bed Debris Flow on Slope Surface forecasting procedure and application | |
| JP6450129B2 (en) | Slope failure prediction method and slope failure prediction device | |
| CN103093102A (en) | Debris flow development-area disaster early-stage dynamic prediction method based on seism and drought monitoring | |
| Clayton et al. | Establishing a multi-scale stream gaging network in the Whitewater River basin, Kansas, USA | |
| Kirlas | Assessment of porous aquifer hydrogeological parameters using automated groundwater level measurements in Greece | |
| Uhl Jr et al. | Results of Pumping Tests in Crystalline‐Rock Aquifers a | |
| CN115310767A (en) | Comprehensive detection and evaluation method for old railway shielding facilities | |
| CN106192864A (en) | The dangerous division methods of a kind of Debris Flow and application thereof | |
| Nixon et al. | DISCUSSION. A STUDY OF THE BANK-FULL DISCHARGES OF RIVERS IN ENGLAND AND WALES. | |
| Sonnekus et al. | A review of selected unexpected large slope failures | |
| Coughenour et al. | In the shadow of the dam–Hydrology of the Little Conemaugh river and its South Fork, with insights about past and future flooding | |
| Bwambale et al. | Influence of source-to-site distance and diagenesis on liquefaction triggering of 200,000-year-old beach sand |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160106 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |