what factors affect landslide speed
eff96a98c45bb09e2e3390e232b4cc33
- Slope saturation by water is a primary cause of landslides. This effect can occur in the form of intense rainfall, snowmelt, changes in ground-water levels, and water-level changes along coastlines, earth dams, and the banks of lakes, reservoirs, canals, and rivers.
4d93111129a8dc4852aa71f9d72d2378
- All dividend metrics data is calculated excluding any special dividends. Historical dividends may be adjusted to reflect any subsequent rights issues and corporate actions. Future dividend dates can be found in company information when announced by Marks & Spencer Group plc.he Wealth 150 is a list of what we believe are the best funds in all the main sectors. For a fund to be selected for the Wealth 150 it must pass a rigorous selection process, and we continually monitor the list to ensure it only contains the best funds.
84b4711d8aa4ff15ce58445ea115be81
- Knowing about the factors that cause erosion will help you identify the source of your erosion and develop the best plan to control it. 1  Factors than can contribute to erosion include soil characteristics, climate, rainfall intensity and duration, vegetation or other surface cover, and topography.
17b6d662abd791fab3321f7abe1ced6d
- Contact local officials about past landslides. Landslides tend to happen in the same area where they have occurred before. Talk to local officials about landslides in your area. If you are in an at-risk area, consider getting a site analysis of your property. This will help you determine any necessary corrective measures.
da3d995c50af37423ce735d267ddd211
Landslide Types and Processes Landslides and Water. Slope saturation by water is a primary cause of landslides. This effect can occur in the form of intense rainfall, snowmelt, changes in ground-water levels, and water-level changes along coastlines, earth dams, and the banks of lakes, reservoirs, canals, and rivers.
054bd8aa03529ae71bde3cfc14fe228e
Landslide HazardsâAn Awareness Guide 1 Soil slopes and rock are weakened through saturation by heavy rains or snowmelt. 2  Mountain climatic conditions —Higher regions are prone to freeze-thaw cycles, and wetter condition promote organic activity and associated weathering; winter snowstorms may produce avalache-prone conditions.
2349fe2ceab576c98723f3ccb0f048e1
Tim Horner CSUS Geology Department - PowerPoint PPT Presentation Higher stream velocities promote erosion and transport of coarser sediments ; Erosion of very small particles difficult due to molecular binding forces; 16. Stream Erosion. Stream gradient is the downhill slope of the streambed ; Typically measured in feet per mile in the U.S., and in meters per kilometer elsewhere ; Usually decreases downstream
b12ee8a6777e9c41a1740d33de4723dd
- Causes of Mass Wasting. Geologic, climatic, and human factors may all contribute to the occurrence of mass wasting events. One of the primary geologic factors that contribute to mass wasting is the steepness of slope (topography,) generally the steeper the slope the more likely it is to fail.ometimes large mass wasting events (or large numbers of smaller events) are associated with heavy rains. Heavy precipitation can initiate certain types of mass wasting by creating hydrostatic pressure and serve to lubricate slides once they are in motion.
44f50c0382f7688eaafd3256a89a4f0d
Landslide HazardsâAn Awareness Guide In many cases, heavy rains set off landslides. However, in many cases landslides may also occur in unpredictable was, such as the timing of a rockfall after a spring thaw. Sometime deep-seated slumps or mudflows will not move until days or weeks have passed after a storm.
7e1b98280a04acf50ef40677d39bdfb2
- Signs of a potential landslide should be reported to your county Emergency Manager so that the area can be properly evaluated. Landslides exist throughout Washington State and can be triggered in many ways. 1  Rainfall —Prolonged or intense rainfall and rain-on-snow events can saturate soils and trigger landslides.
00968b6e480cf89f9e6702b3950d8ec2
- 1 Debris flows from many different sources can combine in channels, and their destructive power may be greatly increased. 2  They continue flowing down hills and through channels, growing in volume with the addition of water, sand, mud, boulders, trees, and other materials. If you are in areas susceptible to landslides and debris flows, consider leaving if it is safe to do so. 2  Remember that driving during an intense storm can be hazardous. 3  If you remain at home, move to a second story if possible.
1149716ed625940b1f75ed27a2270159
How Can Investors Bid on and Buy HUD Homes? For uninsured homes the owner occupancy only bid period is the first 5 days. Investors can bid on HUD homes on the 16th day for insured properties and on the 6th day on uninsured HUD homes. When a HUD homes goes under contract, HUD stops the daily count for a home being on the market.
85d9da2cf2773aa28d8877a26b95a50a
Glacier The speed of glacial displacement is partly determined by friction. Friction makes the ice at the bottom of the glacier move more slowly than ice at the top. In alpine glaciers, friction is also generated at the valley's side walls, which slows the edges relative to the center.
3d1c84244884ed1503c4983202b0727d
Downhill creep Downhill creep. The rate of soil creep down a slope depends on the steepness (gradient) of the slope, water absorption and content, type of sediment and material, and lastly vegetation. The rate of creep will take into account all of these factors to decide whether or not the hillside will progress downward.
cf526bf30283a74ba15698e0e38a9218
Mass wasting Factors that change the potential of mass wasting include: change in slope angle, weakening of material by weathering, increased water content; changes in vegetation cover, and overloading.
70d4ce25fe32c580533114fccd874fcf
- Geologic, climatic, and human factors may all contribute to the occurrence of mass wasting events. One of the primary geologic factors that contribute to mass wasting is the steepness of slope (topography,) generally the steeper the slope the more likely it is to fail. Other geologic considerations include the type of rock, rock chemistry, and fractures, joints, crystal growth, or bedding planes in the rock. Earthquakes and volcanic eruptions are geologic processes which often act as triggers for large mass wasting events. Climate can have a dramatic influence on mass wasting events.
21c8485aeb329b555e4e9d5e60b01181
- Earth's Surface Processes. After seeing some of the slower processes that shape Earth's landscape over time, it is important to remember that some may be much faster process. Events such as landslides, volcanoes, tsunamis and earthquakes can change a landscape in the blink of an eye.hile these slope failures can happen due to natural causes such as torrential rain or earthquakes, they can also be caused by human activity such as machinery blasting that weakens the ground. 1  In the right-center of the picture to the left we see an example of slope failure leading to a landslide in India.
e3693287a0b2754607b573d6f89d0eaa
- CHAPTER 11: Mass Wasting. 1. Mass Wasting is the movement of regolith (unconsolidated rock material) down slope solely as a result of gravity. 2. Factors that influence mass wasting processes include: (a) nature of slope material. (b) amount of water in the slope material. (c) steepness of the slope.
5b132179c168985bb74e2be4ee95cffd
Landslide Hazard Information In addition, debris flows and mudflows usually occur in small, steep stream channels and often are mistaken for floods; in fact, these two events often occur simultaneously in the same area. Landslides can cause flooding by forming landslide dams that block valleys and stream channels, allowing large amounts of water to back up. This causes backwater flooding and, if the dam fails, subsequent downstream flooding.
a5437191cddf11ad05b887246f71fe20
Geology Lab: Streams and Rivers This increases the gradient which causes the water to flow faster which increases erosion and transport, which then reduces the gradient. In the lower reaches of a stream, where the discharge is greater, since friction is less the stream need not be so steep to transport the load.
6dc23b356ec86720b027c6875a81b7f0
What landslides and debris flows are Debris flows, also known as mudslides, are a common type of fast-moving landslide that tends to flow in channels. What causes landslides and debris flows Landslides are caused by disturbances in the natural stability of a slope.
d3d40028fa64821400c3e3b67eb355d6
- Flow. This is the most destructive and turbulent form of landslide. Flows have a high water content which causes the slope material to lose cohesion, turning it into a slurry. They are channelled by the landscape and move rapidly.
caaf3579d05adc1ecd1fe980f9f0e7b9
Landslide HazardsâAn Awareness Guide Factors that make an area prone to landsliding include the following characteristics: Because landslides take a variety of forms and occur in a variety of setting, the key to predicting when they might occur or how they form and may evolve throught time.n many cases, heavy rains set off landslides. However, in many cases landslides may also occur in unpredictable was, such as the timing of a rockfall after a spring thaw. Sometime deep-seated slumps or mudflows will not move until days or weeks have passed after a storm.
0f3689d254a6b2485c562eefe0d975c3
Landslide Hazard Information Alaska and Hawaii also experience all types of landslides. Landslides in the United States cause approximately $3.5 billion (year 2001 dollars) in damage, and kill between 25 and 50 people annually. Casualties in the United States are primarily caused by rockfalls, rock slides, and debris flows.
26611fce99daab44dddc3605a1dfd8a2
- That is, the most intense erosion occurs on the outside of the bends of a curved stream channel or along the bottom and the edges of a straight stream channel. F. Another important factor that affects stream velocity is DISCHARGE, which is the volume of water flowing past a fixed point (gauging station) in a specified amount of time. 1.
337c6ce0494612b096539150e5178c0b
When human activities lead to landslides 1 Water leakage has often been linked with landslides. Whereas rainfall is a natural incidence, leaking from pipes or sewage is not. The water gets absorbed in the land and makes it heavier. When soil gets heavier, it can crash down.  Traffic vibrations can lead to imbalance in the land and make it slide down.