Ether Hollow Debris Flow/Flash Flood Information Guide

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Ether Hollow Debris Flow/Flash Flood Information Guide Ether Hollow Debris Flow/Flash Flood Information Guide The Concern: Debris Flows/Flash Floods from the Ether Hollow Fire Burn Scar Due to burned vegetation, and charred soil forming a water repellent layer, hindering water absorption, flash floods/debris flows will occur with intense periods of rainfall. As little as two tenths of an inch of rain in 30 minutes may produce debris flows/flash floods. What to Look For: Weather Definitions/Notification Services Partner Services E-mail Briefing - General outlook for hazards affecting region, with a lead time from Day 1, out through Day 4, or possibly beyond - Monitor the weather! Flood Watch/Flash Flood Watch - Conditions are favorable for debris flows/flash floods, with generally a lead time of 12-36 hours - Plan, prepare, and be aware! Flash Flood Warning - Debris flow/flash flood is imminent, with a lead time generally of 15 minutes to an hour - Take action now! Everbridge Alerts - Emergency alerts, initiated by community leaders to send messages t o communication devices, including landline phones and mobile devices. Wireless Emergency Alerts (WEAs) are short emergency messages, including for Flash Flood Warnings and evacuation notices, that are broadcast from cell towers to any WEA‐enabled mobile device in a locally targeted area. Additionally, notification calls will be made to community decision makers, with a general lead time of 15 minutes to an hour for storms anticipated to affect a region, but could be made up to 12 hours from the event. 2 Information Sources: Community Alerts and Weather Information Ether Hollow Fire / Flood / Storm Information Group - https://www.facebook.com/groups/1316146318726920/ Springville — Mapleton "Citizen Alert" Program https://member.everbridge.net/1772417038942978/login Wireless Emergency Alerts - Automatically enabled on most mobile devices National Weather Service Weather Forecast Office Salt Lake City, UT home page https://www.weather.gov/slc Social Media h ttps://www.facebook.com/NWSSaltLakeCity . h ttps://www.youtube.com/user/NWSSaltLakeCity @NWSSaltLakeCity Local news sources, including social media feeds Safety: Actions to Protect You and Your Loved Ones Safe - Know your risk of debris flows/flash floods in your specific area - Stay informed by having multiple ways to receive information - Develop an emergency plan - Follow evacuation notices and other instructions from local officials - If you have to shelter in place, get to the highest point inside your home - Obtain flood insurance .
Recommended publications
  • Overview of Landslide Hydrology
    water Editorial Overview of Landslide Hydrology Roy C. Sidle 1,2,* , Roberto Greco 3 and Thom Bogaard 4 1 Mountain Societies Research Institute, University of Central Asia, Khorog GBAO 736000, Tajikistan 2 Sustainability Research Centre, University of the Sunshine Coast, 90 Sippy Downs Dr., Sippy Downs 4556, Queensland, Australia 3 Dipartimento di Ingegneria, Università degli Studi della Campania ‘L. Vanvitelli’, via Roma 9, 81031 Aversa (CE), Italy; [email protected] 4 Department of Water Management, Delft University of Technology, PO Box 5048, 2600 GA Delft, The Netherlands; [email protected] * Correspondence: [email protected]; Tel.: +996-770-822-144 Received: 11 January 2019; Accepted: 15 January 2019; Published: 16 January 2019 Most landslides and debris flows worldwide occur during or following periods of rainfall, and many of these have been associated with major disasters causing extensive property damage and loss of life [1–9]. Given concerns about the effects of climate change on precipitation regime, in the future, some mountainous areas may likely experience more landslides with a faster response to rainfall; however, most such projections are weakly based and remain untested [10,11]. Subsurface hydrology is usually the main triggering mechanism of these landslides and associated debris flows. While the effects of hillslope hydrology on runoff generation have been thoroughly studied, much less attention has been paid to these effects on landslide and debris flow initiation. Recent syntheses demonstrate that it is no longer appropriate to view the subsurface as a static media which facilitates the transit of subsurface water, rather a variety of factors affecting the dynamics of subsurface hydrology need to be considered [12,13].
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  • Documentation and Analysis of Flash Flood Prone Streams and Subwatershed Basins in Pulaski County, Virginia
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  • Effects of Sediment Pulses on Channel Morphology in a Gravel-Bed River
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  • Flash Flood PREPAREDNESS
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  • Bedload Transport and Large Organic Debris in Steep Mountain Streams in Forested Watersheds on the Olympic Penisula, Washington
    77 TFW-SH7-94-001 Bedload Transport and Large Organic Debris in Steep Mountain Streams in Forested Watersheds on the Olympic Penisula, Washington Final Report By Matthew O’Connor and R. Dennis Harr October 1994 BEDLOAD TRANSPORT AND LARGE ORGANIC DEBRIS IN STEEP MOUNTAIN STREAMS IN FORESTED WATERSHEDS ON THE OLYMPIC PENINSULA, WASHINGTON FINAL REPORT Submitted by Matthew O’Connor College of Forest Resources, AR-10 University of Washington Seattle, WA 98195 and R. Dennis Harr Research Hydrologist USDA Forest Service Pacific Northwest Research Station and Professor, College of Forest Resources University of Washington Seattle, WA 98195 to Timber/Fish/Wildlife Sediment, Hydrology and Mass Wasting Steering Committee and State of Washington Department of Natural Resources October 31, 1994 TABLE OF CONTENTS LIST OF FIGURES iv LIST OF TABLES vi ACKNOWLEDGEMENTS vii OVERVIEW 1 INTRODUCTION 2 BACKGROUND 3 Sediment Routing in Low-Order Channels 3 Timber/Fish/Wildlife Literature Review of Sediment Dynamics in Low-order Streams 5 Conceptual Model of Bedload Routing 6 Effects of Timber Harvest on LOD Accumulation Rates 8 MONITORING SEDIMENT TRANSPORT IN LOW-ORDER CHANNELS 11 Monitoring Objectives 11 Field Sites for Monitoring Program 12 BEDLOAD TRANSPORT MODEL 16 Model Overview 16 Stochastic Model Outputs from Predictive Relationships 17 24-Hour Precipitation 17 Synthesis of Frequency of Threshold 24-Hour Precipitation 18 Peak Discharge as a Function of 24-Hour Precipitation 21 Excess Unit Stream Power as a Function of Peak Discharge 28 Mean Scour
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  • Severe Weather Safety Guide Flash Flooding
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  • Stream Erosion
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  • Landslides, and Affected the Eruption Patterns of Some Geysers
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  • A Brief History of . FLOODI NG in Southern Nevada Jan
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  • The Challenge of Explaining Meander Bends in the Eberswalde Delta
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  • Geysers Valley Hydrothermal System (Kamchatka): Recent Changes Related to Landslide of June 3, 2007
    Proceedings World Geothermal Congress 2010 Bali, Indonesia, 25-29 April 2010 Geysers Valley Hydrothermal System (Kamchatka): Recent Changes Related to Landslide of June 3, 2007 A.V. Kiryukhin, T.V. Rychkova, V.A. Droznin, E.V. Chernykh, M.Y. Puzankov, L.P. Vergasova Institute of Volcanology and Seismology FEB RAS, Piip-9, P-Kamchatsky, Russia 683006 [email protected] Keywords: Geysers, landslide, Kamchatka. landslide – the Vodopadny Creek Basin, which does not have the steep slopes and hydrothermal activity exhibited by ABSTRACT the rest of the Geysers Valley. This raises a key question – why did this landslide, which shifted 20 mln m3 of rocks 2 On June 3, 2007 catastrophic landslide took place in Geysers km downstream of the Geysernaya river, bury eight major Valley, Kamchatka. It started with steam explosion and was geysers at lower elevations under 20 - 40 m of mud debris then was transformed into debris mudflow. Within 2 minutes and flood eleven geysers located 20 m beneath Podprudnoe (D. Shpilenok, pers.com. 2007), 20 mln m3 of mud, debris, Lake? and blocks of rock were shifted away. As a result of this, eight major geysers located at lower elevations were sealed The caprock of the hydrothermal reservoir is composed of under 20-40 m of thick mud debris flow, and eleven geysers 4 Geysernya Unit (Q3 grn) lake caldera deposits (pumice sank beneath the 20 m deep Podprudnoe Lake created by tuffs, tuff gravels, tuff sandstones and lenses of breccias), rock dam across the Geysernaya river. Analysis of the dipping at an angle of 8 - 25о to North-West (Fig.
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