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Geological phenomenon
Debris flows are geological phenomena in which water-laden masses of soil and fragmented rock flow down mountainsides, funnel into stream channels, entrain
Debris_flow
Volcanic mudslide
violent type of mudflow or debris flow composed of a slurry of pyroclastic material, rocky debris and water. The material flows down from a volcano, typically
Lahar
Fan-shaped deposit of sediment
the carrying capacity of flow and results in deposition of sediments. The flow can take the form of infrequent debris flows like in a landslide, or can
Alluvial_fan
Scattered remains of something destroyed or discarded
moraine, lahars, and lava eruptions. Geological debris sometimes moves in a stream called a debris flow. When it accumulates at the base of hillsides,
Debris
2010 landslide in British Columbia, Canada
significant volume of material, forming a highly mobile, very rapid debris flow. The debris flow travelled the entire 7 km (4.3 mi) length of Capricorn Creek
2010_Mount_Meager_landslide
1999 natural disaster in Venezuela
the course of 10 days), when torrential rains caused flash floods and debris flows that killed tens of thousands of people, destroyed thousands of homes
Vargas_tragedy
Form of mass wasting
mud flow, is a form of mass wasting involving fast-moving flow of debris and dirt that has become liquified by the addition of water. Such flows can move
Mudflow
Volcanic disaster in Nagasaki Prefecture, Japan
the slope, causing a phenomenon known as pyroclastic flows (in which debris and volcanic gasses flow down the mountainside at speeds of 100 km/h). The threat
1991_Mount_Unzen_eruption
Natural hazard involving ground movement
such as rockfalls, mudflows, shallow or deep-seated slope failures and debris flows. Landslides occur in a variety of environments, characterized by either
Landslide
Natural disaster in Japan
heavy rain. The rain triggered 166 slope failures which included 107 debris flows and 59 shallow slides. The landslides hit residential areas including
2014_Hiroshima_landslides
Deadliest avalanche in the history of Peru
The 1970 Huascarán Debris Avalanche occurred on May 31 1970, when a debris avalanche and mudflow triggered by the Ancash earthquake destroyed the town
1970 Huascarán debris avalanche
1970_Huascarán_debris_avalanche
Classification systems for mass movement of rock and regolith
are falls, slides and flows, but usually topples, lateral spreading and complex movements are added to these. Rock, earth and debris are the terms generally
Landslide_classification
Stratovolcano in the U.S. state of Washington
the Cascade Volcanic Arc that consists of lava flows, debris flows, and pyroclastic ejecta and flows. Its early volcanic deposits are estimated at more
Mount_Rainier
Mathematical tool for wave analysis
driven fluid dynamical and geophysical mass flows such as ocean waves, avalanches, debris flows, mud flows, flash floods, etc., kinematic waves are important
Kinematic_wave
Natural disaster in Switzerland
evacuated since 19 May 2025. The village was largely destroyed by a debris flow and ice avalanche. A 64-year-old shepherd, who was outside the evacuation
2025_Blatten_glacier_collapse
Waterfall in Washington (state), United States
filled in by rock and debris. The floods of 2003 and 2006 actually helped the falls a lot because it removed most of the debris that previously lined
Comet_Falls
Sediment transport mechanism
references to fluidized sediment gravity flows are in fact incorrect and actually refer to liquefied flows. Debris flow or mudflow – Grains are supported by
Sediment_gravity_flow
A flexible debris-resisting barrier is a structure used to mitigate debris flows or to contain flow-entrained woods. These structures mainly consist of
Flexible debris-resisting barrier
Flexible_debris-resisting_barrier
Mountain in Switzerland
elevation of 610m, and experiences debris flows and mud slides several times annually. The largest recorded debris flow in the valley occurred in June 1961
Illhorn
hyperconcentrated flow is a two-phase flowing mixture of water and sediment in a channel which has properties intermediate between fluvial flow and debris flow. Large
Hyperconcentrated_flow
Probability of a volcanic eruption or related geophysical event
blocks of rock and trees, it is a volcanic debris flow. Lahars can form directly from a pyroclastic material flow flowing into a river, or could possibly
Volcanic_hazard
Village in Kaohsiung, Taiwan
prior to the debris flow. The slide immediately covered the northern half of Siaolin and formed a landslide dam, blocking the river's flow. Within 50 minutes
Siaolin_Village
Natural damming of a river by some kind of landslides
the natural damming of a river by some kind of landslide, such as a debris flow, rock avalanche or volcanic eruption. If the damming landslide is caused
Landslide_dam
Natural processes removing soil and rock
and mass movement processes in steep landscapes like landslides and debris flows. The rates at which such processes act control how fast a surface is
Erosion
Disaster in Atami, Shizuoka Prefecture, Japan on 3 July 2021
resulted in significant damage to the community of Atami in Japan. The debris flow by the landslide resulted in life lost, infrastructure damage and had
2021_Atami_landslide
Movement of rock or soil down slopes
or ice. Types of mass wasting include creep, solifluction, rockfalls, debris flows, and landslides, each with its own characteristic features, and taking
Mass_wasting
Center – via University of Delaware. Takahashi, T. (2007). "Preface". Debris flow: mechanics, prediction and countermeasures. Balkema-Proceedings and Monographs
List_of_landslides
Glacier in Washington, United States
debris flows. Similar flows have stemmed from the Nisqually, Kautz, and Winthrop glaciers as well. The glacier has at least 23 recorded debris flows since
South_Tahoma_Glacier
List of wildfires in the U.S. State of Colorado
in 2021, and two people died in 2022 from post-fire flash flood and debris flow events. 2 East Troublesome Grand, Larimer 193,812 October 2020 555 2
List_of_Colorado_wildfires
Chain of stratovolcanoes in western North America
release another massive debris flow over populated areas any time without warning. In the past, Mount Rainier has had large debris avalanches, and has also
Cascade_Volcanoes
Volcanic mudflow in Washington, USA
The Osceola Mudflow, also known as the Osceola Lahar, was a debris flow and lahar in the U.S. state of Washington that descended from the summit and northeast
Osceola_Mudflow
1985 volcanic eruption in Colombia
four enormous lahars (volcanically induced mudflows, landslides, and debris flows) down the slopes at 50 km/h (30 mph). The lahars picked up speed in gullies
Armero_tragedy
Group of volcanoes in British Columbia, Canada
source of several large landslides in the past, including a massive debris flow in 2010 that swept down Meager Creek and the Lillooet River. The Mount
Mount_Meager_massif
Movement of solid particles, typically by gravity and fluid entrainment
moved in debris flows, hyperconcentrated mixtures of mud, clasts that range up to boulder-size, and water. Debris flows move as granular flows down steep
Sediment_transport
Species of fish
information about C. rhotheus colonization after debris flow. In 1996 in Oregon, there were two debris flows caused by storms. The sculpins were found to
Torrent_sculpin
Island volcano in New Zealand's Bay of Plenty
possible debris flows associated with its collapse that can be traced back to the current crater on White Island. One of these debris flows exited the
Whakaari_/_White_Island
Potential health and safety effects of working in fire affected zones
other fires and the additional risk of flash floods or debris flows. Flash floods and debris flows can occur without a burned area, but after a fire, the
Occupational hazards of fire debris cleanup
Occupational_hazards_of_fire_debris_cleanup
Archaic human species from 1 million years ago
cave via a debris flow. As for Facies F, which contains the most human remains, they may have been deposited by a low energy debris flow (consistent
Homo_antecessor
Place in La Guaira State, Venezuela
Wieczorek GF, Larsen MC, Eaton LS, Morgan BA, Blair JL (2 December 2002). "Debris-flow and flooding hazards associated with the December 1999 storm in coastal
Caraballeda
Dimensionless number; ratio of a fluid's flow inertia to the external field
similar flow behavior and bed profile across laboratory, pilot and industrial rotary kilns. Geophysical mass flows such as avalanches and debris flows take
Froude_number
Type of snow avalanche
rapid mass movement of water and snow, and is categorized as a type of debris flow. Slushflows are caused when water reaches a critical concentration in
Slush_flow
Landslides in Kerala, India
Survey of India, the velocity of the debris flow was 57 m/s (190 ft/s). The debris flow originated as a debris slide at an elevation of 1,544 metres
2024_Wayanad_landslides
Mass movement that occurs at volcanoes
a cohesive debris flow from a landslide or rockslide. Debris avalanches may be restricted to grain flows or granular flows, in which flow mechanics are
Volcanic_landslide
Landslides that transport sediment across the continental shelf and into the deep ocean
different landslides present in submarine environment, only slides, debris flow and turbidity currents provide a substantial contribution to gravity
Submarine_landslide
Sedimentary rocks made of mineral or rock fragments
either: In submarine debris flows, avalanches, mud flow or mass flow in an aqueous medium. Technically, turbidites are a form of debris flow deposit and are
Clastic_rock
Sedimentary rock composed of smaller rock fragments
Fanglomerates are poorly sorted, matrix-rich conglomerates that originated as debris flows on alluvial fans and likely contain the largest accumulations of gravel
Conglomerate_(geology)
Stratovolcano in British Columbia, Canada
500 years ago. These collapses resulted in the formation of a large debris flow deposit that fans out into the Squamish Valley. Mount Garibaldi has been
Mount_Garibaldi
2017 wildfire in Southern California
January 10, at least 21 people had been killed by the sudden flooding and debris flows that followed the heavy rains, which also destroyed over 100 homes. On
Thomas_Fire
River section with little or no current
natural obstructions such as ice jams, vegetation blockages, rockslides, debris flow, beaver damming or "backlogging" due to downstream flooding (e.g. due
Backwater_(river)
Waterfall on the Coca River in Ecuador
massive debris flow of loose rock and soil into the Coca River valley. After that, the volcano erupted and a 100-metre-thick (330 ft) basaltic lava flow blocked
San_Rafael_Falls
Active volcano in California, United States
the nearby area through lava flows, pyroclastic flows, lahars (volcanically induced mudslides, landslides, and debris flows), ash, avalanches, and floods
Lassen_Peak
Fatal flooding in India
issued a warning for heavy rainfall in the region until 10 August. The debris flow caused widespread destruction, particularly in the Dharali village (31°02′27″N
2025_Uttarakhand_flash_flood
Colombian volcano victim (1972–1985)
Armero, Tolima. Volcanic debris mixed with ice to form massive lahars (volcanically induced mudflows, landslides, and debris flows), which rushed into the
Omayra_Sánchez
Waterfall in Washington (state), United States
000 m) level, even though she had a crippling nervous disorder. The debris flows of 2001 scoured the creek's banks clean of plant life, and altered the
Christine_Falls
Device on a river to capture debris
interceptor is a device in a river to collect and remove floating debris – before the debris flows out into a harbor, for instance. Installed in May 2014, the
Trash_interceptor
Hill near Castleton in the High Peak of Derbyshire, England
preceding six months". The debris flow poses no threat to any inhabited buildings; however, small farm buildings lying in the flow's path may soon be overwhelmed
Mam_Tor
Software for simulating water flow within rivers
Dewi, V.; Muliawanti, L. (eds.). "Modeling of 2D Hec-Ras Simulation on Debris Flow Analysis on Morphological Changes of the Omu River, Sigi Regency, Central
HEC-RAS
Dam in Kazakhstan
of Almaty, Kazakhstan, designed to protect the city from devastating debris flows (or mudflows). Much of downtown Almaty is built on the alluvial fan of
Medeu_Dam
Fast-moving current of hot gas and volcanic matter that moves away from a volcano
Cas, Ray; Wright, John V.; Giordano, Guido (2024), "Subaqueous Flows of Pyroclastic Debris and Their Deposits", in Cas, Ray; Giordano, Guido; Wright, John
Pyroclastic_flow
River in Washington, United States
a ton of debris washed down from the Kautz Glacier and flowed down the creek, turning the creek into a raging torrent of mud and other debris. Most of
Van_Trump_Creek
Stratovolcano in the Cascade Range, Oregon, US
mudslides, landslides, and debris flows). The flood on August 21, 1934, at a lake formed near Whitewater Glacier, created a debris flow that reached the Whitewater
Mount_Jefferson_(Oregon)
Major landslide in the Philippines
slide-debris avalanche occurred in the Philippine province of Southern Leyte, causing widespread damage and loss of life. The deadly landslide (or debris flow)
2006_Southern_Leyte_mudslide
2020 wildfire in Southern California, US
burned steep mountain terrain already prone to landslide, rockfall, and debris flow hazards. Landslides and rockfalls began in September 2020 as the fire
El_Dorado_Fire
Circular geological feature in the Sahara desert
gravelly deposits consist of a mixture of slope scree, debris flow, and fluviatile or even torrential flow deposits. The finer-grained, sandy deposits consist
Richat_Structure
Lake in Italy
5 km. Lago d'Alleghe It was created by natural causes in 1771 after a debris flow from Monte Piz with a death toll of 49 people. The river Cordevole was
Lake_Alleghe
Mountains in British Columbia
neighbouring communities with pyroclastic flows, lahars (volcanically induced mudslides, landslides and debris flows) and floods. To monitor this threat, the
Mount_Cayley
Multivalued function in mathematics
equation can be given with the help of the W function. Granular and debris flow fronts and deposits, and the fronts of viscous fluids in natural events
Lambert_W_function
1993 wildfire in Southern California
of mud. Arguing that the Kinneloa Fire was a proximate cause of the debris flow, Los Angeles County officials applied for aid from the Federal Emergency
Kinneloa_Fire
Glacier located on the face of Mount Rainier
one of four on Mount Rainier that are known to have released debris flows. Similar flows have stemmed from the Winthrop, Kautz, and South Tahoma glaciers
Nisqually_Glacier
Highest mountain in Turkey
by a gigantic landslide and subsequent debris flow. In addition, this combination of landslide and debris flow destroyed the Armenian monastery of St
Mount_Ararat
Former municipality in Graubünden, Switzerland
town was rebuilt along new central streets. In August 2017 a series of debris flows from the adjacent mountain Piz Cengalo destroyed dozens of buildings
Bondo,_Switzerland
1957 natural disaster in Japan
The second flood, caused by a large-scale debris flow upstream, brought in a large amount of sediment and debris which caused great damage. The muddy torrent
1957_Isahaya_floods
Volcanic mountain in Colombia
of hot gas and rock called pyroclastic flows. These eruptions often cause massive lahars (mud and debris flows), which pose a threat to human life and
Nevado_del_Ruiz
Uncontrolled fire in forests or open spaces
water body size, rainfall, and water flow rates lessen the concentration and potency of fire retardant. Wildfire debris (ash and sediment) clog rivers and
Wildfire
Geological state that may lead to widespread damage or risk
a complex nature, such as an avalanche hitting a lake and causing a debris flow, with consequences potentially hundreds of miles away, or creating a
Geological_hazard
Application of geology to engineering practice
volcanic hazards (volcanic eruptions, hot springs, pyroclastic flows, debris flow, debris avalanche, Volcanic gas emissions, volcanic earthquakes); non-rippable
Engineering_geology
Topics referred to by the same term
conflagration Pyroclastic flow, fast-moving current of hot gas and volcanic matter Lahar, violent volcanic mudflow or debris flow Eschatology, part of theology
Cataclysm
Valley in Valais, Switzerland
geologists as a place to study processes like erosion, rockfall, debris and mud flows. Likewise, the Illgraben serves as a laboratory to test mudflow warning
Illgraben
Natural disaster
and boulders from the Santa Ynez Mountains to flow down creeks and valleys into Montecito. The debris flows were up to 15 feet (5 m) in height of mud, boulders
2018 Southern California mudflows
2018_Southern_California_mudflows
Incised networks of narrow channels and sediments on Mars
gullies resembled debris flows on Earth, it was found that many gullies were on slopes that were not steep enough for typical debris flows. Calculations showed
Gullies_on_Mars
Wieczorek GF, Larsen MC, Eaton LS, Morgan BA, Blair JL (December 2, 2002). "Debris-flow and flooding hazards associated with the December 1999 storm in coastal
List of natural disasters by death toll
List_of_natural_disasters_by_death_toll
Glacier in the United States
one of four on Mount Rainier that are known to have released debris flows. Similar flows have stemmed from the Nisqually, Kautz, and South Tahoma glaciers
Winthrop_Glacier
River that runs through mountains
a type of river, which flow in narrow, deep valleys with steep banks, rocky stream beds, and typically accumulated rock debris. They are characterized
Mountain_river
Rock composed of angular fragments
may be formed by submarine debris flows. Turbidites occur as fine-grained peripheral deposits to sedimentary breccia flows. In a karst terrain, a collapse
Breccia
Meteorological phenomenon
debris flow onto the highway, which in turn triggered the collapse. In Southern California, the storm triggered widespread flooding and debris flows,
Pineapple_Express
Type of sedimentary rock
sheets (dropstones) volcanic origin lahars lahar mass flows entering the ocean marine origin debris flow turbiditic olistostromes mixing of sediments by submarine
Diamictite
Category 5 Atlantic hurricane in 2004
the state due to Ivan. A landslide along Fishhawk Mountain generated a debris flow as fast as 33.2 mph (53.4 km/h). In Peek's Creek, the landslide killed
Hurricane_Ivan
Small dam to counteract erosion
stabilizing adjacent hill slopes. They are further used to mitigate flood and debris flow hazards. Case studies validate the effectiveness of these check dam systems
Check_dam
Clast of rock
be alluvial in origin or the product of "stone avalanches", a type of debris flow resulting from unconsolidated cobbles and gravel. In such stone avalanches
Cobble_(geology)
Collapse of a volcano
1888: largest historical collapse Mount St. Helens, 1980 Volcanology Debris flow Watt, Sebastian F. L. (2019-10-15). "The evolution of volcanic systems
Sector_collapse
Type of landslide caused by rock failure
History. Retrieved 17 December 2015. "Types of Wasting: Slump, Rockslide, Debris Flow & Earthflow – Video & Lesson Transcript". Study.com. Retrieved 17 December
Rockslide
1989 book by John McPhee
to the Atchafalaya River; the Eldfell volcanic eruption of 1973; and debris flow from the San Gabriel Mountains. In 1980, McPhee traveled with his daughter
The_Control_of_Nature
Glacially formed accumulation of debris
A moraine is any accumulation of unconsolidated debris (regolith and rock), sometimes referred to as glacial till, that occurs in both currently and formerly
Moraine
Landslide east of Oso, Washington, United States
national geologist stated the flow of the landslide was extreme because of the extraordinary run-out of mud and debris. While the landslide was well documented
2014_Oso_landslide
Underwater vents or fissures in the Earth's surface from which magma can erupt
Lau, T.-K.; Chadwick, W. W. (2015). "Long-term explosive degassing and debris flow activity at West Mata submarine volcano" (PDF). Geophysical Research
Submarine_volcano
Fallen wood in rivers
Large woody debris (LWD) are the logs, sticks, branches, and other wood that falls into streams and rivers. This debris can influence the flow and the shape
Large_woody_debris
1993 flood in Kagoshima, Japan
was a series of heavy torrential rains which hit Kagoshima, Japan with debris flow in the early part of August 1993. The death toll was 71, and about 2
1993_Kagoshima_flood
Volcano in La Palma, Spain
generating a so-called mega-tsunami. The debris will continue to travel along the ocean floor as a debris flow. Computer modelling indicates that the resulting
Cumbre_Vieja
Natural hazard
by Watts and Waythomas (2003) that the dense, basal debris flow component of a pyroclastic flow produces the most energetic and coherent water waves
Volcanic_tsunami
Type of sediment deposit
which initiates mass movements of sediment (sometimes referred to as debris flow). These kinds of failures often occur when continental shelves or submarine
Subaqueous_fan
DEBRIS FLOW
DEBRIS FLOW
Girl/Female
American, Australian, Chinese, Christian, Danish, French, Greek
Gift; From Doris; Similar to Doris
Male
Greek
(ΤÎÏις) Pet form of Greek Eleftherios, TERIS means "the liberator."
Male
French
 French form of English Dennis, DENIS means "follower of Dionysos." Compare with another form of Denis.
Female
English
(ΔωÏίς) Greek name DORIS means "bounty" and "unmixed, pure." In mythology, this is the name of a goddess of the sea, consort of Nereus and mother of the Nereids (sea nymphs).Â
Female
English
Contracted form of English Deborah, DEBRA means "bee."
Female
English
Pet form of English Deborah, DEBI means "bee."
Female
English
Variant spelling of Greek Doris, DORRIS means "bounty" and "unmixed, pure."
Female
English
Variant spelling of English Debbie, DEBBI means "bee."
Female
English
Pet form of English Deborah, DEBS means "bee."
Male
English
 Anglicized form of Irish Gaelic Donnchadh, DENIS means "brown warrior." Compare with another form of Denis.
Male
Hebrew
(דִּבְרִי) Hebrew name DIBRIY means "my word" or "eloquent." In the bible, this is the name of a man whose daughter married an Egyptian. Also spelled Divri.
Female
Greek
(ΔωÏίς) Greek name DORIS means "bounty" and "unmixed, pure." In mythology, this is the name of a goddess of the sea, consort of Nêreus and mother of the Nereids (sea nymphs).Â
Male
Norse
Usually said to be an Anglicized form of Old Norse Fenrisúlfr, but according to Sophus Bugge, author of The Home of The Eddic Poems, this name, as well as Fenrir, probably originated with Norsemen under the influence of Christianity, and was a word for "hell" and only later took on the FENRIS means "swamp."Â
Male
English
English form of Latin Dionysius, DENNIS means "follower of Dionysos."
Female
English
Pet form of English Deborah, DEBBIE means "bee."
Girl/Female
American, Australian, British, Christian, Danish, English, Finnish, French, German, Greek, Hebrew, Indian, Jamaican, Swedish, Swiss
From Doris; Dorian Woman; Woman of the Sea; Gift; Gift from God; Name of a Place
Female
English
English variant spelling of Spanish Dolores, DELORIS means "sorrows."
Male
Spanish
Spanish form of Latin Cyprianus, CEBRIÃN means "from Cyprus."
Male
English
Anglicized form of Hebrew Dibriy, DIBRI means "my word" or "eloquent." In the bible, this is the name of a man whose daughter married an Egyptian.
Girl/Female
Greek American
meaning gift. Famous bearer: In Greek mythology, Doris was the daughter of Oceanus and mother of...
DEBRIS FLOW
DEBRIS FLOW
DEBRIS FLOW
DEBRIS FLOW
DEBRIS FLOW
DEBRIS FLOW
DEBRIS FLOW
v. t.
To enter on the debtor (Dr.) side of an account; as, to debit the amount of goods sold.
n.
Broken and detached fragments, taken collectively; especially, fragments detached from a rock or mountain, and piled up at the base.
n.
A debt; an entry on the debtor (Dr.) side of an account; -- mostly used adjectively; as, the debit side of an account.
v. t.
To charge with debt; -- the opposite of, and correlative to, credit; as, to debit a purchaser for the goods sold.
n.
Alt. of Dervis
n.
Same as Dermis.
n.
An invocation of, or address to, the Supreme Being.
n.
A species of oak (Quercus cerris) native in the Orient and southern Europe; -- called also bitter oak and Turkey oak.
n.
See Dermis.
n.
Ossification of the dermis.
n.
Same as Deary.
v. t.
See Dermis.
n.
A pebble; a stone; also, a heap of stones or rocky debris.
n.
Alt. of Dervis
n.
Rubbish, especially such as results from the destruction of anything; remains; ruins.
p. pr. & vb. n.
of Debit
n.
A Turkish or Persian monk, especially one who professes extreme poverty and leads an austere life.
imp. & p. p.
of Debit
n.
One who decries.
n.
See Dermis.