Usgs Course Sediment Dynamics in the White River Watershed
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Monitoring the Effects of Knickpoint Erosion on Bridge Pier and Abutment Structural Damage Due to Scour Thanos Papanicolaou University of Iowa, [email protected]
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln Final Reports & Technical Briefs from Mid-America Mid-America Transportation Center Transportation Center 2012 Monitoring the Effects of Knickpoint Erosion on Bridge Pier and Abutment Structural Damage Due to Scour Thanos Papanicolaou University of Iowa, [email protected] David M. Admiraal University of Nebraska-Lincoln, [email protected] Christopher Wilson University of Nebraska-Lincoln Clark W. Kephart University of Nebraska-Lincoln, [email protected] Follow this and additional works at: http://digitalcommons.unl.edu/matcreports Part of the Civil Engineering Commons Papanicolaou, Thanos; Admiraal, David M.; Wilson, Christopher; and Kephart, Clark W., "Monitoring the Effects of Knickpoint Erosion on Bridge Pier and Abutment Structural Damage Due to Scour" (2012). Final Reports & Technical Briefs from Mid-America Transportation Center. 3. http://digitalcommons.unl.edu/matcreports/3 This Article is brought to you for free and open access by the Mid-America Transportation Center at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in Final Reports & Technical Briefs from Mid-America Transportation Center by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. Report # MATC-UI-UNL: 471/424 Final Report 25-1121-0001-471, 25-1121-0001-424 Monitoring the Effects of Knickpoint Erosion ® on Bridge Pier and Abutment Structural Damage Due to Scour A.N. Thanos Papanicolaou, Ph.D. Professor Department of Civil and Environmental Engineering IIHR—Hydroscience & Engineering University of Iowa David M. Admiraal, Ph.D. Associate Professor Christopher Wilson, Ph.D. Assistant Research Scientist Clark Kephart Graduate Research Assistant 2012 A Cooperative Research Project sponsored by the U.S. -
Influence of a Dam on Fine-Sediment Storage in a Canyon River Joseph E
JOURNAL OF GEOPHYSICAL RESEARCH, VOL. 111, F01025, doi:10.1029/2004JF000193, 2006 Influence of a dam on fine-sediment storage in a canyon river Joseph E. Hazel Jr.,1 David J. Topping,2 John C. Schmidt,3 and Matt Kaplinski1 Received 24 June 2004; revised 18 August 2005; accepted 14 November 2005; published 28 March 2006. [1] Glen Canyon Dam has caused a fundamental change in the distribution of fine sediment storage in the 99-km reach of the Colorado River in Marble Canyon, Grand Canyon National Park, Arizona. The two major storage sites for fine sediment (i.e., sand and finer material) in this canyon river are lateral recirculation eddies and the main- channel bed. We use a combination of methods, including direct measurement of sediment storage change, measurements of sediment flux, and comparison of the grain size of sediment found in different storage sites relative to the supply and that in transport, in order to evaluate the change in both the volume and location of sediment storage. The analysis shows that the bed of the main channel was an important storage environment for fine sediment in the predam era. In years of large seasonal accumulation, approximately 50% of the fine sediment supplied to the reach from upstream sources was stored on the main-channel bed. In contrast, sediment budgets constructed for two short-duration, high experimental releases from Glen Canyon Dam indicate that approximately 90% of the sediment discharge from the reach during each release was derived from eddy storage, rather than from sandy deposits on the main-channel bed. -
Minutes of Meeting at British Antarctic Survey Held on Wednesday 15Th November 2006 at 11.00 Am
APC(06)2nd Meeting ANTARCTIC PLACE-NAMES COMMITTEE MINUTES OF MEETING AT BRITISH ANTARCTIC SURVEY HELD ON WEDNESDAY 15TH NOVEMBER 2006 AT 11.00 AM. Present Mr P.J. Woodman Chairman Mrs C. Burgess Permanent Committee on Geographical Names Dr K. Crosbie Ad hoc member Prof J.A. Dowdeswell Director, Scott Polar Research Institute, University of Cambridge Mr A.J. Fox British Antarctic Survey Mr P. Geelan Ad hoc member: former Chairman, APC Lt Cdr J.E.J. Marshall Hydrographic Office Mr S. Ross Polar Regions Unit, Overseas Territories Department, Foreign and Commonwealth Office Ms J. Rumble Polar Regions Unit, Overseas Territories Department, Foreign and Commonwealth Office Dr J.R. Shears British Antarctic Survey Dr M.R.A. Thomson Ad hoc member Ms A. Martin Secretary 1. Apologies for absence and new members Apologies for absence were received from Dr Hattersley-Smith, Royal Geographical Society. The Chairman welcomed Dr Crosbie who had joined the committee as a result of the recruitment initiative following the last meeting. The Chairman also welcomed Mr Ross, the new BAT Desk Officer at the Polar Regions Unit, Foreign and Commonwealth Office. 2. Minutes of the last meeting, held on 10th May 2006 The minutes were approved by all present. It was pointed out that the letters of reappointment for Mr Geelan, Dr Thomson and Mr Woodman had not been received. The Secretary was asked to look into this and to ensure that the letters were sent. 3. Matters arising from the minutes of the last meeting Secretary’s review of development work being carried out on the BAT Gazetteer and APC website. -
Explain How Rivers Adjust to a Change in Base Level with Reference to Examples You Have Studied (2013 Q1C)
Isostasy | A1 Sample answer Explain how rivers adjust to a change in base level with reference to examples you have studied (2013 Q1C) Isostatic uplift is when land rises above sea level because of tectonic activity. This is usually due to a large weight being removed from the land e.g. when an ice cap melts. Eustatic changes are when the sea level drops. This is due to water being locked away somewhere e.g., in a glacier. When it melts, the sea level rises again. The River Nore in Kilkenny has experienced a change in base level. This can be seen since there are knickpoints along it, roughly 150-200m above sea level. A knickpoint can be seen when the sea level drops and a river rejuvenates because the river starts vertically eroding once more. Rejuvenation is the term used to describe a river that starts eroding like a youthful river even when it is in its old age stage. A knickpoint is a spot where the newly eroded river profile meets the old river profile. Sometimes you will find a waterfall here. River terraces are also found where rejuvenation has occurred. This is when a river forms a new floodplain that is lower down than the last. The remnants of the old floodplain are left as steps and are called terraces. If there are terraces on both sides of the river, they are called paired terraces. Terraces can be formed multiple times if the river rejuvenates more than once, appearing as a series of steps down to the river. -
Chapter 8 - Natural Environment 8 - Natural Chapter B
• Preserved open spaces This chapter identifies Enumclaw’s environmental • Important wildlife habitat conditions and issues and describes the link between • Unmeasured social and ecological benefits the natural environment and the community’s future. • A sense of community pride and well-being The Washington State Growth Management Act (GMA) requires all towns, cities, and counties adopt Goal NE – 1: To maintain networks of open space development regulations to protect critical areas within the City including wildlife habitat corridors, (aquifer recharge areas, sensitive fish and wildlife stormwater management, trails, and critical areas. habitat, frequently flooded areas, geologically hazardous areas, and wetlands) and resource lands Policies of long-term significance (agricultural, forest, and mineral lands) and that they incorporate “best 1.1 Increase public awareness of the City’s open available science” in those regulations. The City space system. believes these areas are valuable assets for the a. Create a program for education of natural ecological balance they provide and also for the systems and the open spaces of the city. aesthetics and quality of life expected by community b. Standardize signing and other visual residents. The intent is to provide (but not exceed) components typical in park development for critical solid policy foundation for the Critical Area Ordinance areas. (CAO). This chapter illustrates previously-identified 1.2 Encourage corridor development for pedestrian critical areas and resource lands. Continuing and wildlife routes. inventory will clarify critical area boundaries and a. Keep the City’s Parks and Recreation Plan provide additional information on the application of comprehensive and updated, outlining current and policy and regulations. -
Trip Planner
National Park Service U.S. Department of the Interior Grand Canyon National Park Grand Canyon, Arizona Trip Planner Table of Contents WELCOME TO GRAND CANYON ................... 2 GENERAL INFORMATION ............................... 3 GETTING TO GRAND CANYON ...................... 4 WEATHER ........................................................ 5 SOUTH RIM ..................................................... 6 SOUTH RIM SERVICES AND FACILITIES ......... 7 NORTH RIM ..................................................... 8 NORTH RIM SERVICES AND FACILITIES ......... 9 TOURS AND TRIPS .......................................... 10 HIKING MAP ................................................... 12 DAY HIKING .................................................... 13 HIKING TIPS .................................................... 14 BACKPACKING ................................................ 15 GET INVOLVED ................................................ 17 OUTSIDE THE NATIONAL PARK ..................... 18 PARK PARTNERS ............................................. 19 Navigating Trip Planner This document uses links to ease navigation. A box around a word or website indicates a link. Welcome to Grand Canyon Welcome to Grand Canyon National Park! For many, a visit to Grand Canyon is a once in a lifetime opportunity and we hope you find the following pages useful for trip planning. Whether your first visit or your tenth, this planner can help you design the trip of your dreams. As we welcome over 6 million visitors a year to Grand Canyon, your -
Late Holocene Sea Level Rise in Southwest Florida: Implications for Estuarine Management and Coastal Evolution
LATE HOLOCENE SEA LEVEL RISE IN SOUTHWEST FLORIDA: IMPLICATIONS FOR ESTUARINE MANAGEMENT AND COASTAL EVOLUTION Dana Derickson, Figure 2 FACULTY Lily Lowery, University of the South Mike Savarese, Florida Gulf Coast University Stephanie Obley, Flroida Gulf Coast University Leonre Tedesco, Indiana University and Purdue Monica Roth, SUNYOneonta University at Indianapolis Ramon Lopez, Vassar College Carol Mankiewcz, Beloit College Lora Shrake, TA, Indiana University and Purdue University at Indianapolis VISITING and PARTNER SCIENTISTS Gary Lytton, Michael Shirley, Judy Haner, STUDENTS Leslie Breland, Dave Liccardi, Chuck Margo Burton, Whitman College McKenna, Steve Theberge, Pat O’Donnell, Heather Stoffel, Melissa Hennig, and Renee Dana Derickson, Trinity University Wilson, Rookery Bay NERR Leda Jackson, Indiana University and Purdue Joe Kakareka, Aswani Volety, and Win University at Indianapolis Everham, Florida Gulf Coast University Chris Kitchen, Whitman College Beth A. Palmer, Consortium Coordinator Nicholas Levsen, Beloit College Emily Lindland, Florida Gulf Coast University LATE HOLOCENE SEA LEVEL RISE IN SOUTHWEST FLORIDA: IMPLICATIONS FOR ESTUARINE MANAGEMENT AND COASTAL EVOLUTION MICHAEL SAVARESE, Florida Gulf Coast University LENORE P. TEDESCO, Indiana/Purdue University at Indianapolis CAROL MANKIEWICZ, Beloit College LORA SHRAKE, TA, Indiana/Purdue University at Indianapolis PROJECT OVERVIEW complicating environmental management are the needs of many federally and state-listed Southwest Florida encompasses one of the endangered species, including the Florida fastest growing regions in the United States. panther and West Indian manatee. Watershed The two southwestern coastal counties, Collier management must also consider these issues and Lee Counties, commonly make it among of environmental health and conservation. the 5 fastest growing population centers on nation- and statewide censuses. -
Rivers and Base Level—Cool Stuff Earth Science Essentials by Russ Colson
Stories of Other Worlds—How to Build a Landscape Rivers and Base Level—Cool Stuff Earth Science Essentials by Russ Colson The River—The state boundary that moves. The migration of rivers has a long and complex history in human politics and war. The problem arises because rivers were commonly used to mark boundaries of adjacent political entities. When the rivers inevitably migrated, as mature streams are wont to do, disagreements arose about who owned the new land formed on the inside bend of the meanders. It seems like a simple solution would be to keep the boundaries fixed, whether the river migrates or not. That way, the land controlled by a particular political entity is not changed by the vagaries of erosion and deposition. However, suppose that the river is an important defensive barrier against attack? Clearly, in that case the border needs to be maintained along the river. Or, what if the river is important for commerce and transportation? Again, keeping the border along the river makes sense, regardless of the gain or loss of land. In his 1715 (edition) book Of the Rights of War and Peace, Hugo Grotius took the view that many rivers are defensive boundaries and ...the river, by gradually altering its course, does also alter the borders of the territory; and whatsoever the river casts up to the opposite side, shall be under his jurisdiction, to whom the augmentation is made Although geologists treat the various processes of river migration (such as erosion, deposition, meander cut offs, etc) as part of a single process, courts have often ruled that they are quite different. -
Geology of Blaine-Birch Bay Area Whatcom County, WA Wings Over
Geology of Blaine-Birch Bay Area Blaine Middle Whatcom County, WA School / PAC l, ul G ant, G rmor Wings Over Water 2020 C o n Nest s ero Birch Bay Field Trip Eagles! H March 21, 2020 Eagle "Trees" Beach Erosion Dakota Creek Eagle Nest , ics l at w G rr rfo la cial E te Ab a u ant W Eagle Nest n d California Heron Rookery Creek Wave Cut Terraces Kingfisher G Nests Roger's Slough, Log Jam Birch Bay Eagle Nest G Beach Erosion Sea Links Ponds Periglacial G Field Trip Stops G Features Birch Bay Route Birch Bay Berm Ice Thickness, 2,200 M G Surficial Geology Alluvium Beach deposits Owl Nest Glacial outwash, Fraser-age in Barn k Glaciomarine drift, Fraser-age e e Marine glacial outwash, Fraser-age r Heron Center ll C re Peat deposits G Ter Artificial fill Terrell Marsh Water T G err Trailhead ell M a r k sh Terrell Cr ee 0 0.25 0.5 1 1.5 2 ± Miles 2200 M Blaine Middle Glacial outwash, School / PAC Geology of Blaine-Birch Bay Area marine, Everson ll, G Gu Glaciomarine Interstade Whatcom County, WA morant, C or t s drift, Everson ron Nes Wings Over Water 2020 Semiahmoo He Interstade Resort G Blaine Semiahmoo Field Trip March 21, 2020 Eagle "Trees" Semiahmoo Park G Glaciomarine drift, Everson Beach Erosion Interstade Dakota Creek Eagle Nest Glac ial Abun E da rra s, Blaine nt ti c l W ow Eagle Nest a terf California Creek Heron Glacial outwash, Rookery Glaciomarine drift, G Field Trip Stops marine, Everson Everson Interstade Semiahmoo Route Interstade Ice Thickness, 2,200 M Kingfisher Surficial GNeeoslotsgy Wave Cut Alluvium Glacial Terraces Beach deposits outwash, Roger's Glacial outwash, Fraser-age Slough, SuGmlaacsio mSataridnee drift, Fraser-age Log Jam Marine glacial outwash, Fraser-age Peat deposits Beach Eagle Nest Artificial fill deposits Water Beach Erosion 0 0.25 0.5 1 1.5 2 Miles ± Chronology of Puget Sound Glacial Events Sources: Vashon Glaciation Animation; Ralph Haugerud; Milepost Thirty-One, Washington State Dept. -
Hells Canyon 5 Day to Heller
Trip Logistics and Itinerary 5 days, 4 nights Wine & Food on the Snake River in Hells Canyon Trip Starts: Minam, OR Trip Ends: Minam, OR Put-in: Hell’s Canyon Dam, OR Take-out: Heller Bar, WA (23 miles south of Asotin, WA) Trip length: 79 miles Class III-IV rapids Each Trip varies slightly with size of group, interests of guests, etc. This is a “typical” trip itinerary that will vary. Day before Launch: Stop at Minam on your way to your motel in Wallowa or Enterprise to pick up your dry bag and go over the morning itinerary. Day 1: If staying in Wallowa at the Mingo Motel we will pick you up at 6:15 am. If staying in Enterprise we will pick you up at the Ponderosa Motel in our shuttle van at 6:45 am. Travel to Hells Canyon Dam Launch site (3hr drive from Minam) with a bathroom break at the Hells Canyon Overlook. Meet your guides, go over basic safety talk, and load into rafts between 10 and 11 am. Lunch will be served riverside. Enjoy awe inspiring geology, spot wildlife. Run some of the biggest whitewater of the trip, first up Wild Sheep Rapid. Stop to scout Granite Rapid and view Nez Perce pictographs. Arrive in camp between 3-4pm. Evening camp time: swim, hike, play games, relax! Approximately 6pm: Wine and Hor D’oevres presented by Chef Andrae and the featured Winery. Approximately 7 pm dinner presented by chef Andrae Bopp. Day 2: Coffee is ready by 6 am. Leisurely breakfast between 7 and 8 am. -
River Incision Into Bedrock: Mechanics and Relative Efficacy of Plucking, Abrasion and Cavitation
River incision into bedrock: Mechanics and relative efficacy of plucking, abrasion and cavitation Kelin X. Whipple* Department of Earth, Atmospheric, and Planetary Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 Gregory S. Hancock Department of Geology, College of William and Mary, Williamsburg, Virginia 23187 Robert S. Anderson Department of Earth Sciences, University of California, Santa Cruz, California 95064 ABSTRACT long term (Howard et al., 1994). These conditions are commonly met in Improved formulation of bedrock erosion laws requires knowledge mountainous and tectonically active landscapes, and bedrock channels are of the actual processes operative at the bed. We present qualitative field known to dominate steeplands drainage networks (e.g., Wohl, 1993; Mont- evidence from a wide range of settings that the relative efficacy of the gomery et al., 1996; Hovius et al., 1997). As the three-dimensional structure various processes of fluvial erosion (e.g., plucking, abrasion, cavitation, of drainage networks sets much of the form of terrestrial landscapes, it is solution) is a strong function of substrate lithology, and that joint spac- clear that a deep appreciation of mountainous landscapes requires knowl- ing, fractures, and bedding planes exert the most direct control. The edge of the controls on bedrock channel morphology. Moreover, bedrock relative importance of the various processes and the nature of the in- channels play a critical role in the dynamic evolution of mountainous land- terplay between them are inferred from detailed observations of the scapes (Anderson, 1994; Anderson et al., 1994; Howard et al., 1994; Tucker morphology of erosional forms on channel bed and banks, and their and Slingerland, 1996; Sklar and Dietrich, 1998; Whipple and Tucker, spatial distributions. -
Palu Colostate 0053A 15347.Pdf
DISSERTATION FLOODWAVE AND SEDIMENT TRANSPORT ASSESSMENT ALONG THE DOCE RIVER AFTER THE FUNDÃO TAILINGS DAM COLLAPSE (BRAZIL) Submitted by Marcos Cristiano Palu Department of Civil and Environmental Engineering In partial fulfillment of the requirements For the Degree of Doctor of Philosophy Colorado State University Fort Collins, Colorado Spring 2019 Doctoral Committee: Advisor: Pierre Julien Christopher Thornton Robert Ettema Sara Rathburn Copyright by Marcos Cristiano Palu 2019 All Rights Reserved ABSTRACT FLOODWAVE AND SEDIMENT TRANSPORT ASSESSMENT ALONG THE DOCE RIVER AFTER THE FUNDÃO TAILINGS DAM COLLAPSE (BRAZIL) The collapse of the Fundão Tailings Dam in November 2015 spilled 32 Mm3 of mine waste, causing a substantial socio-economic and environmental damage within the Doce River basin in Brazil. Approximately 90% of the spilled volume deposited over 118 km downstream of Fundão Dam on floodplains. Nevertheless, high concentration of suspended sediment (≈ 400,000 mg/l) reached the Doce River, where the floodwave and sediment wave traveled at different velocities over 550 km to the Atlantic Ocean. The one-dimensional advection- dispersion equation with sediment settling was solved to determine, for tailing sediment, the longitudinal dispersion coefficient and the settling rate along the river and in the reservoirs (Baguari, Aimorés and Mascarenhas). The values found for the longitudinal dispersion coefficient ranged from 30 to 120 m2/s, which are consistent with those in the literature. Moreover, the sediment settling rate along the whole extension of the river corresponds to the deposition of finer material stored in Fundão Dam, which particle size ranged from 1.1 to 2 . The simulation of the flashy hydrographs on the Doce River after the dam collapse was initially carried out with several widespread one-dimensional flood routing methods, including the Modified Puls, Muskingum-Cunge, Preissmann, Crank Nicolson and QUICKEST.