Ọdịda mmiri mmiri na oke mkpamkpa mwepu ebili mmiri¶

Ọdachi dị egwu dam, mmebi levee, ma ọ bụ Glacial Lake Outburst Flood (GLOF) na-ahapụ ọtụtụ nde na narị nde cubic mita nke mmiri a kpara akpa n'ime nkeji ole na ole, na-ebute oke mbufịt dị n'ime ala dị ka mmiri mmiri ** nke na-efesa ndagwurugwu osimiri niile gbadaa n'ụra. N'adịghị ka idei mmiri nke oge oyi nke na-ebili centimita site na centimita n'ime awa ma ọ bụ ụbọchị, dam mebiri emebi, nkwụsị ọdụdụ m dara ada, ma ọ bụ moraine dara ada na-ewepụta mgbidi mmiri, apịtị, nkume, osisi ndị a gbajiri agbaji, na ụlọ ndị a gbajiri agbaji ** 3 ruo 30 mita (10 ruo 100 feet) n'ịdị elu (10 ruo 100 feet) na-eme njem na kilomita 5 kwa elekere. awa). N'ihi na nke a hyperconcentrated irighiri ebili mmiri nwere ihe ruru okpukpu abụọ njupụta nke larịị mmiri na-akụrisị ọkọlọtọ osisi-obere na ụlọ brik na mmetụta, ndo n'ime a ụlọ ma ọ bụ ịrị n'elu n'elu ụlọ obibi n'ime inundation zone na-adịkarị egbu egbu: ** nlanarị dabere kpamkpam na ozugbo perpendicular mgbapụ elu na ndagwurugwu na elu ala n'elu kacha dam-elu.

Mee nke a ugbu a¶

1. ** Wepụ ozugbo n'akụkụ ọwa mmiri (gbago na mkpọda ndagwurugwu, ọ dịghị mgbe ọ bụla n'elu mmiri ma ọ bụ mgbada). Lelee ala dị n'akụkụ ọ bụla nke ndagwurugwu ahụ wee gbagote n'akụkụ ugwu kachasị elu, bluff, ma ọ bụ mkpọda n'akụkụ ogo 90 dịpụrụ adịpụ site na ọwa mmiri ** ruo mgbe ọ dịkarịa ala ** 15 ruo 30 mita (50 ruo 100 feet)** n'elu ala ndagwurugwu (ma ọ bụ n'elu mpaghara mpaghara gị).
2. Gaa n'ụkwụ ozugbo ma ọ bụrụ na okporo ụzọ ndagwurugwu kpọchiri akpọchi, kpọchie ya ma ọ bụ gafee àkwà mmiri. Iju mmiri mmiri na-agbaji ma ọ bụ GLOF na-aga njem na 20 ruo 65 kilomita kwa elekere (12 ruo 40 miles kwa hour) ma buru ụzọ mebie àkwà mmiri ndị dị ala. Ọ bụrụ na okporo ụzọ kwụsịrị ịkwagharị ma ọ bụ na ịnọ n'ime ** kilomita 5 (kilomita 3)* nke ọwa mmiri mmiri, levee, ma ọ bụ glacial valley, ** hapụ ụgbọ ala gị ozugbo wee gbagote n'akụkụ ugwu n'ụkwụ. Nkeji iri nke ịrị elu ugwu na-eme ka ị dị mita 60 ruo 100 kwụ ọtọ (200 ruo 330 ụkwụ) n'elu ala osimiri ahụ, na-agaghị erute gị ihe fọrọ nke nta ka ọ bụrụ ebili mmiri ọ bụla.
3. Gbata akara ịdọ aka ná ntị 4 nke okike mgbe ọkwa ikuku ikuku ma ọ bụ sirens dara. Dam dakwasa na GLOF na-emekarị n'abalị, n'oge ala ọma jijiji, ma ọ bụ n'oge oke mmiri ozuzo na-ebu ụzọ ebupụ ụlọ elu ekwentị. Wepụ n'ala dị elu ozugbo ọ bụrụ na ị chọpụta: ** (a) ụda ala na-aga n'ihu, nke na-adịghị ala ala na ụda ntị chiri ** nke na-ada ụda dị ka ụgbọ oloko na-efe efe dị ala ma ọ bụ squadron nke ụgbọ elu jet na-agbada n'ọdụ ụgbọ mmiri; ** (b) ọdịda mberede, nke na-ekwekọghị n'okike ma ọ bụ mpụta apịtị na mberede n'ogo mmiri osimiri**; © ísì siri ike nke ụwa a zọpịara ọhụrụ, sọlfọ, na osisi pine/cedar a kụdara amịkpọ na-ebufe na ifufe oyi mberede na ndagwurugwu ahụ; ma ọ bụ ** (d) oke ala ọma jijiji ma ọ bụ mkpọda ugwu ugwu ** mgbe ị bi n'okpuru mmiri mmiri ma ọ bụ ọdọ mmiri glacial.
4. Ejila ụgbọala ma ọ bụ jegharịa na mmiri idei mmiri na-akpụ akpụ ma ọ bụ gafee àkwà mmiri dị n'elu mmiri na-arị elu. Naanị ** centimeters 6 (inch 6) nke mmiri na-agba ọsọ na-atụpụ okenye n'ụkwụ ha, na ** 30 ruo 60 centimeters (1 na 2 feet)* nke mmiri na-asọ asọ na-ese n'elu ma na-ebupụ nnukwu ụgbọ ala SUV na ụgbọ ala anọ. Na mgbakwunye, agabigala àkwà mmiri mgbe mmiri idei mmiri na-erute n'elu àkwà mmiri ma ọ bụ na-ama jijiji n'ike n'akụkụ mkpọmkpọ ebe: ihe mkpofu dị elu na-asọpụta na nnukwu akwa mmiri na-agbapụta n'okpuru obere asphalt tupu okporo ụzọ ahụ daa.
5. ** Ọ bụrụ na ị na-ebi n'azụ levee ụrọ nke na-amalite "aja na-esi esi," na-ahụ mmiri apịtị, ma ọ bụ na-akụda, pụọ tupu ya agbawa.* Ọ bụ ezie na mmiri doro anya na-eji nwayọọ nwayọọ na-agbapụta, ** mmiri apịtị, nke jupụtara na mmiri na-esi na obụpde ájá ma ọ bụ mgbape na-ahụ anya na okpueze levee pụtara nhụsianya dị n'ime na-adọwa levee iche n'ime *** na ọdachi dị omimi nwere ike ime na nkeji. Kpọọ nọmba mberede mpaghara gị (911 na United States na Canada, 112 gafee European Union, 999 na United Kingdom, ma ọ bụ hụ ha niile. nọmba mberede) wee pụọ ozugbo.
6. Nọrọ n'ala dị elu mgbe ebili mmiri nke mbụ gafere: ebili mmiri nke abụọ, ụlọ akụ daa, na apịtị na-egbu egbu na-esochi. Mmebi mmiri mmiri na GLOF na-emekarị na ** ọtụtụ mgbawa ** ka mbuze azụ na-agbasawanye nbibi ma ọ bụ ọdọ mmiri glacial nke abụọ na dams na-ada n'ala gbawara n'elu mmiri. Ọbụlagodi mgbe ọkwa mmiri gachara, pụọ na ndagwurugwu ahụ a kpụchara ọhụrụ: mgbidi ọwa mmiri juru na-ada na nnukwu ụlọ abụọ. ndakpọ ala, na ọdụ ọdụdụ m ma ọ bụ apịtị idei mmiri nke ụlọ ọrụ na-emekarị dị ka ** ngwa ngwa na *** nke nwere ọla dị arọ, cyanide, nsị mmiri, ma na-ebikwa ahịrị nnyefe voltaji dị elu.

Ọdịda mgbochi mmiri, mmebi levee, yana osisi mkpebi nlanarị GLOF¶

Jiri eserese mkpebi mkpebi ngwa ngwa a ozugbo ị nwetara Dam Watch/Ịdọ aka ná ntị, hụ obụpde ájá levee, ma ọ bụ nụ mkpọtụ ọgba mmiri dị elu.

flowchart TD
    Start["Njikere ọdịda Dam, ịdọ aka ná ntị mmebi Levee,<br/>Glacial Lake Outburst (GLOF) Siren, ma ọ bụ mgbago Canyon Roar"] --> TimeCheck{"Ogologo oge ole ka ị nwere tupu <br/> ebili mmiri abịarute?"}

    TimeCheck -->|"NKWUKWU OKWU (Nke abụọ ruo <15 nkeji) <br/>Anụ mkpu ákwá Siren, Mkpu Mberede, ma ọ bụ Roar nụrụ"| RunUpSlope["Ụlọ ABANDON & Ugbo ala Ọ BỤRỤ na akpọchie:<br/>Na-agba ọsọ n'ụkwụ na 90 degrees PERPENDICULAR to the river channel<br/>Gaa n'elu ugwu kacha nso, bluff, ma ọ bụ mgbidi ndagwurugwu<br/> Ebumnuche maka >= 15 ruo 30 vertical meters (50 to 100 floor)"]

    RunUpSlope --> TrappedCheck{"Mmiri gbara gị gburugburu kpamkpam<br/> na larịị idei mmiri na-enweghị ugwu efu?"}
    TrappedCheck -->|"Mba: Eruola ala dị elu"| StayHigh["Nọrọ n'ala dị elu maka ọtụtụ ebili mmiri<br/>Arịdatala iji napụta ihe onwunwe ma ọ bụ metụ apịtị aka"]
    TrappedCheck -->|"Ee: Ala dị larịị, ebili mmiri na-abata ugbu a"| VerticalLastResort["MKWAPỤTA EZINỤLỌ EZINỤLỌ KWESỊRỊ: <br/> Rigo n'elu igwe ma ọ bụ ụlọ siri ike siri ike (akụkọ 3+)<br/>Zere ụlọ osisi, ụlọ mkpanaka, na àkwà mmiri<br/>Weta ngwaọrụ flotation; kpọchiela onwe gị n'uko ụlọ mechiri emechi"]

    TimeCheck -->|"Ịdọ aka ná ntị mbụ (Nkeji 30 ruo ọtụtụ awa) <br/>FEMA / Weather Service 'Dam Watch' ma ọ bụ amụma overtopping Levee"| VehicleEvac["1. Jidere Go-Bag, ọgwụ, anụ ụlọ, na ezinụlọ ozugbo<br/>2. Gbalie elu na pụọ ​​na mapped Dam Inundation Zone<br/> na-eji okporo ụzọ ugwu (AGBAGHỊ ịnya n'okporo ụzọ osimiri ruo ala ma ọ bụ n'elu àkwà mmiri dị ala)<br/>3. Ọ bụrụ na okporo ụzọ na-akpachi n'ime ndagwurugwu ahụ, dọba ụgbọala n'okporo ụzọ wee jiri ụkwụ gbagoro n'elu ugwu"]

    VehicleEvac --> LeveeInspect{"Ị hụrụ 'osi ájá' ma ọ bụ apịtị apịtị<br/> na ala nke dam ma ọ bụ levee dị nso?"}
    LeveeInspect -->|"Ee: Mmiri ajị anụ na-agbapụta"| ReportPiping["CRITICAL PIPING FAILURE IN PROGRESS:<br/>Do NOT try to plug the hole yourself.<br/>Evacuate the floodplain immediately and call 911 / 112 / 999<br/>to report exact GPS location of the muddy sand boil"]
    LeveeInspect -->|"Mba"| StayOutZone["Lelee ezinụlọ gị na-abụghị mpaghara idei mmiri <br/> Nyochaa NOAA Weather Redio / Mgbasa Ozi Mberede Mba"]

N'iji atụnyere ụdị 4 nke ọdịda mbibi mbibi¶

Ọ bụghị ihe mgbochi niile na ọdịda mgbochi na-akpa àgwà otu ụzọ ahụ. Ihe mgbochi ihe mgbochi na-ada ngwa ngwa dị ka tank mmiri na-agbawa agbawa, ihe mgbochi ụrọ na-eji nwayọọ nwayọọ na-emebi ihe karịrị nkeji 20 ruo 90, ọdọ mmiri glacial na-ewepụta irighiri ihe jupụtara n'oké nkume na-asọda n'akụkụ ugwu, ọdụ ọdụ m na-ahapụkwa osimiri nke nsị nsị na-egbu egbu.

Understanding official dam and levee emergency alert levels¶

In the United States (National Weather Service / FEMA / US Army Corps of Engineers), Canada, the United Kingdom (Environment Agency), the European Union, and Himalayan/Andean GLOF monitoring networks, authorities use standardized escalation tiers. Knowing the difference between a Watch and an Emergency Warning tells you whether you have hours or seconds:

1. Dam / Levee Watch (Advisory or Condition B: Potential Failure Developing):
2. What it means: Floodwaters behind a dam or levee are approaching dangerous capacity, auxiliary spillways are discharging at maximum rate, or engineers have discovered a structural defect (such as seepage or minor slumping) that could lead to failure if conditions worsen.
3. What you must do NOW: Pack your emergency Go-Bag, load mobility-limited family members, infants, and pets into your vehicle, move livestock to high pasture, and evacuate the inundation zone early while roads and bridges are still completely dry.
4. Flash Flood Warning for Dam Failure / Levee Breach (Condition A: Imminent or Active Failure):
5. What it means: The dam or levee is actively failing right now or is guaranteed to breach within minutes. Wireless Emergency Alerts (WEA) on mobile phones will sound a loud alarm tone with the header "FLASH FLOOD WARNING: DAM FAILURE" or "EXTREME EMERGENCY: EVACUATE TO HIGH GROUND."
6. What you must do NOW: Drop everything and move to high ground immediately. Do not pack possessions; grab only the people next to you and climb out of the valley floor.
7. High-Volume Spillway Release Warning (Non-Breach Controlled Flood):
8. What it means: To keep an earthen dam from overtopping and collapsing completely during historic rainfall (such as during a hurricane or atmospheric river), dam operators are forced to open the emergency floodgates or auxiliary spillway to release massive volumes of water down the river channel.
9. What you must do NOW: Evacuate all low-lying riverfront homes, campgrounds, and floodplains immediately, as river levels can rise 3 to 10 meters (10 to 33 feet) in a single hour even though the dam itself has not broken.

Oge Iju Mmiri ebili mmiri, Ọsọ, na ike mmetụta site na anya ala ala¶

Ịghọta ka ebili mmiri na-agbaji ma ọ bụ GLOF si agbanwe ka ọ na-agbada n'ọwa mmiri na-enyere gị aka ikpebi nkeji ole ị ga-agbago na nchekwa:

Otu esi achọpụta dam ma ọ bụ levee ụrọ na-ada ada: Iwu "Clear vs. Muddy Seepage"¶

Ọtụtụ nde mmadụ na-ebi ozugbo n'azụ ụgbọ mmiri na-achịkwa ide mmiri nke ụrọ, ihe ndị e ji ekpuchi ọwa mmiri, mmiri mmiri mmiri, ma ọ bụ mmiri mmiri ọkụ na-eju mmiri. Ọ bụrụ na ị na-enyocha dam levee ma ọ bụ ụrọ n'oge oke mmiri, ndị injinia na-eji otu nlele anya dị mfe ịmata ọdịiche dị na mmiri na-adịghị emerụ ahụ site na mmebi na-abịanụ:

• ** Mmiri dị ọcha na-ahụ nwayọọ nwayọọ = Lelee anya nke ọma, obere ihe ize ndụ nbibi ozugbo **: Mgbe mmiri guzoro elu megide leve ụrọ ruo ọtụtụ ụbọchị, ala ahụ na-ejuju afọ, mmiri na-asọpụta na-agbakarị ọsụsọ ma ọ bụ na-agbapụta nwayọọ nwayọọ n'akụkụ mkpịsị ụkwụ ala. Ọ bụrụ na mmiri ahụ bụ ** kristal doro anya *** na ọnụ ọgụgụ na-asọpụta na-aga n'ihu, ọkpụkpụ ala dị n'ime levee ahụ na-ejidesi ike (ndị injinia na-ejikarị akpa aja aja na-ada ụda doro anya nke ọma iji bulie isi nrụgide azụ).
• **Muddy, Dirty, Silt-Laden Water Gushing or Bubbling = Wepụ ngwa ngwa (Piping Na-arụ ọrụ) ***: Ọ bụrụ na mmiri na-esi na ala na-apụta ma ọ bụ na-esi na mkpọda azụ nke dam ahụ bụ ** ígwé ojii, aja aja, apịtị, ma ọ bụ ikpokọta cone nke ájá na ájá dị ka obere mgbawa na-agbọpụ ọkụ), "mmiri na-asọ oyi na-asọ oyi" isi si n'ime dam ***. Ezoro ezo n'okpuru ụkwụ gị, ọwara ala (paịpụ) na-eri azụ azụ n'ebe ọdọ mmiri ahụ. Ozugbo ọwara ahụ gafere n'akụkụ osimiri ahụ, mmiri mmiri a na-agbanye mmiri na-eme ka oghere ahụ na-amụba n'ime nkeji ole na ole, na-ada n'elu levee ahụ wee wepụta mmebi zuru oke. Ejekwala ije n'elu leve na-ada ada ma ọ bụ na-esi esi, anwala ịtinye etuto apịtị na-agbapụta site n'ịtụba unyi n'ime oghere, ma kpọọ 911/112/999 mgbe ị na-apụ.

Survival physics when caught in the open or inside a vehicle¶

If you are caught in a valley when a dam breach or GLOF wave arrives and cannot reach the upper valley wall in time:

1. Always choose a steep natural hillside over ANY man-made structure: Even a 10-meter (33-foot) natural rock outcrop or dirt hillside anchored into the earth cannot be knocked down by a flood wave, whereas a 3-story brick building sitting in the middle of the valley floor can have its foundations undermined and collapse into the torrent.
2. If no hillside exists (flat floodplain), choose the right vertical evacuation building:
3. Abandon: Single-story homes, wood-frame houses, mobile homes/caravans, unreinforced brick buildings, metal warehouses, and vehicles.
4. Climb: A multi-story (3+ stories) reinforced poured-concrete or structural steel building (such as a hospital, university building, multi-story concrete parking garage, or modern hotel). Move to the 3^rd floor or higher and stay on the downstream side of the building interior away from windows facing the oncoming wave impact.
5. Never trap yourself inside a closed attic without an axe or roof hatch: If rising water forces you up the stairs of a building, never climb into an enclosed attic unless there is a walk-out window, a roof hatch, or you carry a heavy axe/sledgehammer capable of smashing through wooden roof sheathing and shingles. Hundreds of flood victims have drowned trapped against the underside of their own roof peak.
6. If swept into the water: Do not try to swim against the current or stand up in fast-moving water (putting your feet down in rocky floodwater traps your foot between cobbles while the current pushes your torso forward, folding you underwater: foot entrapment). Roll onto your back with your feet pointing downstream and held high at the surface to fend off boulders and floating timber, angle your body at a 45-degree ferry angle toward the nearest shoreline eddy or hillside, and scramble up the bank the instant you hit slower water on the inside bend of the valley.

Pre-planning: How to read your local Dam Inundation Map and GLOF Hazard Map¶

If you live, work, or camp in a river valley, coastal polder, or alpine canyon, take 10 minutes before an emergency to check your exposure:

1. Look up the National Dam Inventory and Inundation Maps:
2. United States: Search the US Army Corps of Engineers National Inventory of Dams (NID) (nid.sec.usace.army.mil) ma ọ bụ ebe nchekwa nchekwa mmiri steeti gị (dị ka California DWR Dam Breach Inundation Maps) iji lelee kpọmkwem n'okporo ámá n'okporo ámá ** Sunny-Day Breach** na Mmiri-Emetara Iju Mmiri polygons inundation na oge mbata ebili mmiri (dịka, "15-nkeji ifefe mbata contour" vs. *"2-hour)
3. United Kingdom & Europe: Lelee UK Environment Agency ** Map Iju Mmiri Mmiri** (check-for-flooding.service.gov.uk) or national civil protection hydrological portals.
4. Alpine & Mountain Regions (Himalayas, Andes, Alps, Rockies, Alaska, Iceland, New Zealand): Check regional geological survey Glacial Lake Inventory and GLOF Hazard Maps before trekking or camping in glacial river valleys; never pitch a tent on a low gravel bar or river terrace inside a glacial valley, even on a sunny summer night.
5. Identify Two Perpendicular Foot-Evacuation Trails: Walk out your front door and identify the fastest route on foot (via a pedestrian staircase, hillside trail, or steep cross-street) that climbs perpendicularly away from the river to an elevation above the mapped inundation boundary. Practice walking it with your family so everyone can find it in total darkness during a blackout.

Ajụjụ a na-ajụkarị¶

enyochara isi mmalite¶

• Federal Emergency Management Agency (FEMA, United States) and United States Army Corps of Engineers (USACE): Federal Guidelines for Dam Safety: Emergency Action Planning for Dam Owners (FEMA P-64), National Inventory of Dams (NID), and Levee Seepage and Sand Boil Field Manual.
• United States Geological Survey (USGS) and National Oceanic and Atmospheric Administration (NOAA / NWS, United States): Debris-Flow, Landslide-Dam Outburst, and Dam-Break Flood Wave Hydraulics and Warning Protocols.
• International Centre for Integrated Mountain Development (ICIMOD), United Nations Office for Disaster Risk Reduction (UNDRR), and World Meteorological Organization (WMO): Early Warning Systems and Evacuation Guidelines for Glacial Lake Outburst Floods (GLOFs) in the Hindu Kush Himalaya, Andes, and European Alps.
• International Commission on Large Dams (ICOLD) and United Nations Environment Programme (UNEP): Global Industry Standard on Tailings Management (GISTM) and emergency evacuation lessons from catastrophic tailings dam liquefaction failures.
• Environment Agency (United Kingdom): Reservoir Flood Maps and Community Emergency Plan Guidance for Dam Inundation Zones.

Ntuziaka emetụtara¶

• Flash floods: immediate high-ground survival
• Floods: preparation, evacuation, and safe return
• Landslides, mudslides, and debris flows
• Earthquakes: Drop, Cover, and Hold On
• Car in water: sinking vehicle escape