CN109376416A - Gully type mud-rock flow channel Circulation Area dimensional topography evolution analysis method - Google Patents
Gully type mud-rock flow channel Circulation Area dimensional topography evolution analysis method Download PDFInfo
- Publication number
- CN109376416A CN109376416A CN201811197380.7A CN201811197380A CN109376416A CN 109376416 A CN109376416 A CN 109376416A CN 201811197380 A CN201811197380 A CN 201811197380A CN 109376416 A CN109376416 A CN 109376416A
- Authority
- CN
- China
- Prior art keywords
- mud
- cross
- section
- rock flow
- flow
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/20—Design optimisation, verification or simulation
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/10—Alarms for ensuring the safety of persons responsive to calamitous events, e.g. tornados or earthquakes
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Hardware Design (AREA)
- Evolutionary Computation (AREA)
- Geometry (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
- Revetment (AREA)
Abstract
The invention discloses a kind of gully type mud-rock flow channel Circulation Area dimensional topography evolution analysis methods, belong to geological disaster to prevent and reduce natural disasters technical field, the method of the present invention acquires channel cross section landform altitude along channel stream central line in the flowing area of mud flow at a certain distance, each cross section is subjected to equidistant segmentation based on discretization thought, it is deep by measuring the corresponding flow velocity of any time and mud in each segmentation, the groove channel erosion rate for calculating each cross section segmentation and the depth of erosion during mud-rock flow, landform altitude after obtaining each cross section debris flow erosion, finally adjacent cross section landform contour point is connected by straight line, landform of the channel Circulation Area ditch bed under mud-rock flow souring can be obtained to develop, the method of the present invention not only overcomes the subjectivity and uncertainty of conventional method empirical parameter value in debris flow erosion calculating, Dimensional topography of the channel Circulation Area landform after mud-rock flow washes away can be obtained simultaneously, the work that can prevent and reduce natural disasters for mud-rock flow provides reference.
Description
Technical field
It prevents and reduces natural disasters technical field the invention belongs to geological disaster, and in particular to a kind of gully type mud-rock flow channel Circulation Area
Dimensional topography evolution analysis method.
Background technique
Mud-rock flow is a kind of typical earth's surface dynamic process and mountain area people life property safety and social and economic construction
One of chief threat faced.Mud-rock flow dynamic process has apparent remodeling and transformation effect to channel landform.Mud-rock flow punching
Under brush effect, Circulation Area groove channel erosion depth may be up to several meters, changed dramatically the landform evolutionary process of channel.Meanwhile mudstone
Landform of stream carrying under one's arms develops a large amount of channel bulk materials to be formed to channel downstream accumulation area, can make debris flow scale increase severely 10~
100 times, exacerbate the harm of mud-rock flow.
Debris flow erosion and channel seabed evolution process are calculated and analyzed frequently with empirical regression formula at present, however
Such method has following two prominent question: (1) eroding analysis only for single-point in channel, can not be suitable for entire channel
The evolution analysis of Circulation Area dimensional topography can not also calculate the channel bulk materials total amount generated by dimensional topography evolution；(2) it passes through
The regression formula multi-pass for the property tested is crossed empirical coefficient and is adjusted to depth of erosion calculating, and this kind of empirical coefficient does not have specific physics to anticipate
Justice, there is also more academic disputes for reasonable value range.The above problem causes existing method to circulate in gully type mud-rock flow channel
In the EVOLUTION ANALYSIS of area's dimensional topography exist limitation, and cause debris flow control works when designing to total value with actually deposit
In bigger difference, the mitigation effect of debris flow control works is affected.
Summary of the invention
In view of the deficiencies of the prior art, it is three-dimensional that the purpose of the present invention is to provide a kind of gully type mud-rock flow channel Circulation Areas
Landform evolution analysis method calculates Circulation Area landform and is respectively segmented based on discretization thought by the way that each cross section to be segmented
Transient state erosion rate and depth of erosion during mud-rock flow, the landform altitude after obtaining each cross section debris flow erosion,
Adjacent cross section landform contour point is connected by straight line finally, forms the dimensional topography after channel develops.
This gully type mud-rock flow channel Circulation Area dimensional topography evolution analysis method provided by the invention, including following step
It is rapid:
Step 1: the acquisition of channel cross section landform altitude Z (i)；
Gully type flowing area of mud flow section is determined by field investigation, and along channel stream central line (ditch valley point line) every one
Set a distance L obtains channel cross section, on cross-sectional direction by each cross section it is horizontal it is equidistant be divided into n sections, and obtain every section of ditch
The elevation on bed surface is Z (i), unit m, wherein i indicates that ditch bed cross section is segmented label, i=1,2 ..., n；
Step 2: calculating the mud-rock flow transient state erosion rate E (i, t) of each cross section corresponding segments of any time；
The debris flow velocity v (i, t) and mud depth h (i, t) of cross section corresponding segments i t at any time are calculated, and according to such as
Lower calculation formula calculates the transient state erosion rate E (i, t) of cross section corresponding segments i:
It wherein, is g acceleration of gravity, value 9.8N/kg, θ are the channel of cross-sectional location along mud-rock flow flow direction
The gradient, BDFor the pore pressure parameter of the ditch bed soil body,For the internal friction angle of the ditch bed soil body,For mud-rock flow particle
The internal friction angle of substance, β are breadth coefficient of the debris flow velocity along depth direction；
Step 3: the earth's surface elevation Z ' (i) after the ditch bed erosion of the calculating each cross section corresponding segments of any time；
Mud-rock flow is calculated according to the following formula to the depth of erosion d of cross section segmentation iscAnd the earth's surface after the erosion of ditch bed cross section is high
Journey Z ' (i)；
Z'(i)=Z (i)-dsc(i)
Wherein, T is always lasting for mud-rock flow process；
Step 4: the topographic contour after debris flow erosion constructs, the dimensional topography after channel develops is obtained；
Each cross section is calculated after the topography variation under debris flow erosion effect, two neighboring cross section landform contour point
It is connected by straight line, topographic contour of the Circulation Area channel under debris flow erosion effect can be obtained.
In a specific embodiment, in step 2, the ditch bed soil body pore pressure parameter BDUsing as follows with
The method of machine value determines:
1) when above covering mud-rock flow fluid mud depth h (i, t) t constantly increasing at any time, i.e., the ditch bed soil body is in stress state,
Soil body hole is compressed, then pore water pressure increases, and pore pressure parameter takes at random between a reference value B and maximum value 1.2B
Value, BD=random (B, 1.2B) is calculated when 1.2B value is greater than 1.0 by 1.0；
2) when above covering mud-rock flow fluid mud depth h (i, t) t constantly reducing at any time, i.e., the ditch bed soil body is in unloading condition,
The expansion of soil body hole, then pore water pressure reduces, and pore pressure parameter takes random value between minimum value 0.8B and a reference value B,
BD=random (0.8B, B).
Further, the ditch bed soil body pore pressure parameter a reference value B is according to the degree of saturation of the ditch bed soil body, with reference to such as
Lower principle determines:
I) in a saturated state or when close to saturation when ditch bed soil moisture content is higher, soil body pore pressure parameter base
Quasi- value B value range is 0.8~1.0；
Ii) when ditch bed soil moisture content is lower, when in approximate drying regime, soil body pore pressure parameter a reference value B
Value range is 0.1~0.2.
In a specific embodiment, in step 2, the debris flow velocity along depth direction breadth coefficient β,
Value is according to following principle:
I) it is greater than the viscous debris flow of 17kN/m3, breadth coefficient β of the flow velocity along depth direction for mud-rock flow fluid bulk density
Value is 0~0.1；
II) it is less than the diluted debris flow of 17kN/m3, breadth coefficient of the flow velocity along depth direction for mud-rock flow fluid bulk density
β value is 0.5~0.6.
In a specific embodiment, in step 3, depth of erosion d of the mud-rock flow to cross section segmentation isc, can
It is calculated using following discrete form:
Wherein, Δ t is the time step that debris flow gully bed erosion rate calculates, and Δ t value is smaller, then calculated result more connects
Nearly true value.
Further, in actually calculating, the time step Δ t value that debris flow gully bed erosion rate calculates is 1.0s.
Compared with the existing technology, the present invention has following advantageous effects:
The invention proposes a kind of gully type mud-rock flow channel Circulation Area dimensional topography evolution analysis method and the prior arts
Compared with method, the method for the present invention is based on discretization thought by the way that each cross section to be segmented, and it is each to calculate Circulation Area landform
It is segmented transient state erosion rate and depth of erosion during mud-rock flow, the landform after obtaining each cross section debris flow erosion is high
Journey is finally connected adjacent cross section landform contour point by straight line, forms the dimensional topography after channel develops, the method for the present invention
The subjectivity and uncertainty for not only overcoming conventional method empirical parameter value in debris flow erosion calculating, can be obtained simultaneously
Dimensional topography of the channel Circulation Area landform after mud-rock flow washes away, the work that can prevent and reduce natural disasters for mud-rock flow provide reference.
Detailed description of the invention
Fig. 1 is a kind of flow chart of gully type mud-rock flow channel Circulation Area dimensional topography evolution analysis method.
Fig. 2 is the full basin schematic diagram of certain mud-rock flow channel.
Fig. 3 is that the present invention applies the channel EVOLUTIONARY COMPUTATION result at certain first cross section in mud-rock flow channel Circulation Area to show
It is intended to.
Fig. 4 is that the present invention applies the dimensional topography schematic diagram after the evolution of certain mud-rock flow channel Circulation Area channel.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiment of the present invention, rather than whole embodiments, based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
Invention is further explained with attached drawing combined with specific embodiments below:
Using gully type mud-rock flow channel Circulation Area of the present invention dimensional topography evolution analysis method, to the channel Circulation Area
Landform evolutionary process of the shape after mud-rock flow case in 2010 is analyzed and has been calculated, specific as shown in Figure 1, including following step
It is rapid:
Fig. 2 is the schematic diagram in certain full basin of mud-rock flow channel, which is located at Japanese Amami O Shima mountain area.It is adjusted through scene
Reflection is looked into, outburst mud-rock flow in 2010 lasts about 120 seconds, mud-rock flow initially just measures about 5800m3, mud is found by field investigation
Rock glacier process generates apparent erosion and transformation, Circulation Area depth of erosion about 0.5~2.0m to channel, and erosion causes channel to circulate
Area's landform develops, and generates and carries about 2800m3The bulk materials just measured are to downstream channel accumulation area；
Step 1: the acquisition of channel cross section landform altitude Z (i)；
The channel Circulation Area of in-site measurement before debris flow occurrence in 2010 is every along channel stream central line (ditch valley point line)
Channel cross section landform altitude is measured every L=30m length, field investigation shows channel Circulation Area overall length about 500m, such as Fig. 1 institute
Show, it is total to measure 17 cross sections along channel stream central line, it is according to equidistant 0.02m that channel is horizontal by taking first cross section as an example
It is Z (i), unit m that section, which is divided into the horizontal equidistant elevation for being divided into 800 sections, and obtaining every section of ditch bed surface in cross section,
In, the i.e. Z (525)=97.9m minimum marked as the ditch height of bed journey at i=525 of channel segmentation；
Step 2: calculating the mud-rock flow transient state erosion rate E (i, t) of each cross section any time corresponding segments；
By taking first cross section as an example, the time graph of the cross section place mud-rock flow mud depth h (t), i.e. mud-rock flow mud are obtained
The deep change curve lasted with mud-rock flow, and by by The Ministry of Land and Resources of the People's Republic of China, MOLR publish " mud-stone flow disaster is anti-
Control engineering exploration specification (DZ/T 0220-2006) " flow relocity calculation method, according to mud deeply obtain debris flow velocity v (t)；With t
For the transient state of=2.0s, which punishes mud depth h (525,2)=0.2m of section i=525, it is concluded that v
(525,2)=8m/s, then calculate the section stream central line punishment section i=525 t=2.0s transient state erosion rate E (525,
2)；
Wherein, gravity acceleration g=9.8N/kg, the channel of cross-sectional location along mud-rock flow flow direction gradient θ=
31 °, the ditch bed soil body is in unsaturated state, therefore pore pressure parameter a reference value value B=0.50.Mudstone when because of t=2.0s
Mud depths is flowed in build phase, and soil body hole is compressed, therefore pore pressure parameter value is in BD=random (0.5,0.6)
Between, this example random value is BD=0.58.The internal friction angle of the ditch bed soil bodyMud-rock flow particulate matter it is interior
Angle of frictionMud-rock flow category diluted debris flow at this, therefore flow velocity is along depth direction breadth coefficient β=0.50, on
It states parameter and calculates section stream central line punishment section i=525 in transient state erosion rate E (525,2)=0.0136m/s of t=2.0s.
Step 3: calculate each cross section any time corresponding segments ditch bed cross section corrode after earth's surface elevation Z '
(i)；
Channel landform altitude after calculating depth of erosion and corroding, punishing section i=525 with first cross section stream central line is
Example calculates mud-rock flow to the depth of erosion d of cross section segmentation iscWith the channel landform altitude Z'(i after erosion).The secondary mud-rock flow
Total 120s is lasted, Δ t value is 1.0s, then the depth of erosion at i=525 segmentation after 120s mud-rock flow washes away are as follows:
Therefore, at first cross section stream central line punishment section i=525, the landform altitude after mud-rock flow souring are as follows:
Z'(525)=Z (525)-dsc(525)=97.90-1.10=96.80m
And the landform segmentation after corroding first cross section is connected with straight line, be can get cross section landform and is rushed in mud-rock flow
Landform after swiped through journey develops, and calculated result is as shown in Figure 3；
Step 4: the topographic contour after debris flow erosion constructs, the dimensional topography after channel develops is obtained；
Each cross section is calculated after the topography variation under debris flow erosion effect in above-mentioned steps, two neighboring cross section
Landform contour point is connected by straight line, and ground of the Circulation Area channel under debris flow erosion effect can be obtained
Shape contour, and with original contour comparison after can calculate mud-rock flow channel Circulation Area landform generated after evolution it is loose along journey
Substance side's amount is 2840m3；Channel circulation of the Fig. 4 by taking wherein three adjacent cross sections as an example, after illustrating mud-rock flow souring
Area's dimensional topography schematic diagram.
If being only capable of eroding analysis for single point in channel, entire channel can not be suitable for using conventional method
The evolution analysis of Circulation Area dimensional topography can not also calculate the channel bulk materials total amount generated by dimensional topography evolution.This hair
Bright the method not only overcomes conventional method subjectivity of empirical parameter value and uncertain in debris flow erosion calculating
Property, while dimensional topography of the channel Circulation Area landform after mud-rock flow washes away can be obtained provides for mud-rock flow work of preventing and reducing natural disasters
With reference to.
Claims (6)
1. a kind of gully type mud-rock flow channel Circulation Area dimensional topography evolution analysis method, which comprises the following steps:
Step 1: the acquisition of channel cross section landform altitude Z (i)；
Gully type flowing area of mud flow range is determined by field investigation, and L obtains ditch at a certain distance along channel stream central line
Road cross section；On cross-sectional direction by each cross section it is horizontal it is equidistant be divided into n sections, and the elevation for obtaining every section of ditch bed surface is
Z (i), unit m, wherein i indicates that ditch bed cross section is segmented label, i=1,2 ..., n；
Step 2: calculating the mud-rock flow transient state erosion rate E (i, t) of each cross section corresponding segments of any time；
Calculate the debris flow velocity v (i, t) and mud depth h (i, t) of cross section corresponding segments i t at any time, and according to counting as follows
Calculate the transient state erosion rate E (i, t) that formula calculates cross section corresponding segments i:
It wherein, is g acceleration of gravity, value 9.8N/kg, θ are slope of the channel along mud-rock flow flow direction of cross-sectional location
Degree, BDFor the pore pressure parameter of the ditch bed soil body,For the internal friction angle of the ditch bed soil body,For mud-rock flow particulate matter
Internal friction angle, β be debris flow velocity along depth direction breadth coefficient；
Step 3: the earth's surface elevation Z ' (i) after the ditch bed erosion of the calculating each cross section corresponding segments of any time；
Mud-rock flow is calculated according to the following formula to the depth of erosion d of cross section segmentation iscAnd the earth's surface elevation Z ' after the erosion of ditch bed cross section
(i)；
Z'(i)=Z (i)-dsc(i)
Wherein, T is always lasting for mud-rock flow process；
Step 4: the topographic contour after debris flow erosion constructs, the dimensional topography after channel develops is obtained；It calculates each cross-section
After the topography variation under debris flow erosion effect, two neighboring cross section landform contour point is connected by straight line in face, can be obtained
Topographic contour of the Circulation Area channel under debris flow erosion effect.
2. gully type mud-rock flow channel Circulation Area dimensional topography evolution analysis method according to claim 1, which is characterized in that
In step 2, the ditch bed soil body pore pressure parameter BDIt is determined using the method for following random value:
1) when above covering mud-rock flow fluid mud depth h (i, t) t constantly increasing at any time, i.e., the ditch bed soil body is in stress state, the soil body
Hole is compressed, then pore water pressure increases, and pore pressure parameter takes random value, B between a reference value B and maximum value 1.2BD
=random (B, 1.2B) is calculated when 1.2B value is greater than 1.0 by 1.0；
2) when above covering mud-rock flow fluid mud depth h (i, t) t constantly reducing at any time, i.e., the ditch bed soil body is in unloading condition, the soil body
Hole expansion, then pore water pressure reduces, and pore pressure parameter takes random value, B between minimum value 0.8B and a reference value BD=
random(0.8B,B)。
3. gully type mud-rock flow channel Circulation Area dimensional topography evolution analysis method according to claim 2, which is characterized in that
The ditch bed soil body pore pressure parameter a reference value B is determined according to the degree of saturation of the ditch bed soil body with reference to following principle:
I) in a saturated state or when close to saturation when ditch bed soil moisture content is higher, soil body pore pressure parameter a reference value B
Value range is 0.8~1.0；
Ii) when ditch bed soil moisture content is lower, when in approximate drying regime, soil body pore pressure parameter a reference value B value
Range is 0.1~0.2.
4. gully type mud-rock flow channel Circulation Area dimensional topography evolution analysis method according to claim 1, which is characterized in that
In step 2, the debris flow velocity is along the breadth coefficient β of depth direction, and value is according to following principle:
I) it is greater than the viscous debris flow of 17kN/m3, breadth coefficient β value of the flow velocity along depth direction for mud-rock flow fluid bulk density
It is 0~0.1；
II) it is less than the diluted debris flow of 17kN/m3 for mud-rock flow fluid bulk density, flow velocity takes along the breadth coefficient β of depth direction
Value is 0.5~0.6.
5. gully type mud-rock flow channel Circulation Area dimensional topography evolution analysis method according to claim 1, which is characterized in that
In step 3, depth of erosion d of the mud-rock flow to cross section segmentation isc, following discrete form can be used and calculate:
Wherein, Δ t is the time step that debris flow gully bed erosion rate calculates, and Δ t value is smaller, then calculated result is closer to true
Real value.
6. gully type mud-rock flow channel Circulation Area dimensional topography evolution analysis method according to claim 5, which is characterized in that
The time step Δ t that debris flow gully bed erosion rate calculates is 1.0s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811197380.7A CN109376416B (en) | 2018-10-15 | 2018-10-15 | Three-dimensional terrain evolution analysis method for valley type debris flow channel circulation area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811197380.7A CN109376416B (en) | 2018-10-15 | 2018-10-15 | Three-dimensional terrain evolution analysis method for valley type debris flow channel circulation area |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109376416A true CN109376416A (en) | 2019-02-22 |
| CN109376416B CN109376416B (en) | 2022-12-27 |
Family
ID=65400375
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811197380.7A Active CN109376416B (en) | 2018-10-15 | 2018-10-15 | Three-dimensional terrain evolution analysis method for valley type debris flow channel circulation area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109376416B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110162866A (en) * | 2019-05-16 | 2019-08-23 | 成都理工大学 | A kind of mud-rock flow channel deposit depth calculation method based on borehole data |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106529198A (en) * | 2016-12-13 | 2017-03-22 | 中国科学院、水利部成都山地灾害与环境研究所 | Numerical value simulation and numerical value calculation method for overall process of debris flow |
| CN108411844A (en) * | 2018-03-12 | 2018-08-17 | 中南大学 | A kind of analysis of the debris flow velocity field of the irregular section of natural raceway groove and device |
-
2018
- 2018-10-15 CN CN201811197380.7A patent/CN109376416B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106529198A (en) * | 2016-12-13 | 2017-03-22 | 中国科学院、水利部成都山地灾害与环境研究所 | Numerical value simulation and numerical value calculation method for overall process of debris flow |
| CN108411844A (en) * | 2018-03-12 | 2018-08-17 | 中南大学 | A kind of analysis of the debris flow velocity field of the irregular section of natural raceway groove and device |
Non-Patent Citations (2)
| Title |
|---|
| 陈明等: "震区急陡沟道型泥石流特征及动力过程研究――以汶川瓦窑沟为例", 《云南大学学报(自然科学版)》 * |
| 黄海等: "杂谷脑河流域暴雨型泥石流沟地貌特征分析", 《水土保持通报》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110162866A (en) * | 2019-05-16 | 2019-08-23 | 成都理工大学 | A kind of mud-rock flow channel deposit depth calculation method based on borehole data |
| CN110162866B (en) * | 2019-05-16 | 2022-04-22 | 成都理工大学 | Debris flow channel siltation depth calculation method based on drilling data |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109376416B (en) | 2022-12-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105369768B (en) | A kind of viscous mud-flow most favourable opposition plays measuring method and its application of height | |
| Ruiz‐Villanueva et al. | Exploring large wood retention and deposition in contrasting river morphologies linking numerical modelling and field observations | |
| Dal Sasso et al. | Assessment methodology for the prediction of landslide dam hazard | |
| CN104631378B (en) | Viscous debris flow rectangular drainage groove depth measuring and calculating method and application | |
| CN105160193A (en) | Dynamic process based debris flow dynamic risk analysis system and method | |
| Moussa | Evaluation of local scour around bridge piers for various geometrical shapes using mathematical models | |
| CN111582597B (en) | Method and equipment for predicting landslide hazard of power transmission line | |
| CN106570287A (en) | Method for predicting water inflow of tunnel based on three-dimensional discrete fracture network | |
| Jin et al. | Prediction of city tunnel water inflow and its influence on overlain lakes in karst valley | |
| Uotani et al. | Experimental and numerical study on hydrodynamics of riparian vegetation | |
| Heydari et al. | Flood Zoning Simulation byHEC-RAS Model (Case Study: Johor River-Kota Tinggi Region) | |
| Wu et al. | Impacts of ice cover on local scour around semi-circular bridge abutment | |
| CN106968217A (en) | Debris flow sedimentation danger range division method based on rainfall frequency | |
| CN109376416A (en) | Gully type mud-rock flow channel Circulation Area dimensional topography evolution analysis method | |
| Vallé et al. | Field mapping and digital elevation modelling of submerged and unsubmerged hydraulic jump regions in a bedrock step–pool channel | |
| Lytton et al. | Characteristics of expansive clay roughness of pavements | |
| Carlsson et al. | Model calculation of the groundwater flow at Finnsjoen, Fjaellveden, Gideaa and Kamlunge | |
| Soussa et al. | Flood hazard in wadi Rahbaa area, Egypt | |
| Severi et al. | Oil and gas activities in Emilia-Romagna Region (Italy): land deformation and territory protection. | |
| Zhang et al. | Efficient numerical simulation of debris flow with erosion and sedimentation | |
| EGASHIRA et al. | Sediment run-out processes and possibility of sediment control structures in the 2013 Izu-Ohshima event | |
| Nama et al. | Riverbed Scour Due to Accumulation of Floating Debris on Al-Msharah Bridge Piers | |
| Park | A prediction of meander migration based on large-scale flume tests in clay | |
| Abduljaleel et al. | Sediment transport capacity of Tigris River within Baghdad City | |
| Li et al. | The groundwater impacts of rock tunneling analysis based on stochastic modeling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |