Geologic Reconnaissance of the Yukon Flats District Alaska
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Mississippi Alluvial Plain
Mississippi Alluvial Plain Physical description This riverine ecoregion extends along the Mississippi River, south to the Gulf of Mexico. It is mostly a flat, broad floodplain with river terraces and levees providing the main elements of relief. Soils tend to be poorly drained, except for the areas of sandy soils. Locations with deep, fertile soils are sometimes extremely dense and poorly drained. The combination of flat terrain and poor drainage creates conditions suitable for wetlands. Bottomland deciduous forest vegetation covered the region before much of it was cleared for cultivation. Winters are mild and summers are hot. The wetlands of the Mississippi Alluvial Plain are an internationally important winter habitat for migratory waterfowl. The White River National Wildlife Refuge alone offers migration habitat to upwards of 10,000 Canada geese and 300,000 ducks every year. These large numbers account for one-third of the total found in Arkansas, and 10% of the waterfowl found in the Mississippi Flyway. At one time, wetlands were very abundant across the Mississippi Alluvial Plain. The decline in wetlands began several centuries ago when the first ditches were dug to drain extensive areas. Clearing bottomland hardwood forests for agriculture and other activities resulted in the loss of more than 70% of the original wetlands. Presently, most of the ecoregion is agricultural, cleared of natural vegetation and drained by a system of ditches. Dominant vegetation On the Mississippi Alluvial Plain, changes in elevation of only a few inches can result in great differences in soil saturation characteristics, and therefore the species of plants that thrive. -
How Geography "Mapped" East Asia, Part One: China by Craig Benjamin, Big History Project, Adapted by Newsela Staff on 01.26.17 Word Count 1,354 Level 1020L
How Geography "Mapped" East Asia, Part One: China By Craig Benjamin, Big History Project, adapted by Newsela staff on 01.26.17 Word Count 1,354 Level 1020L TOP: The Stalagmite Gang peaks at the East Sea area of Huangshan mountain in China. Photo by: Education Images/UIG via Getty Images MIDDLE: Crescent Moon Lake and oasis in the middle of the desert. Photo by: Tom Thai, Flickr. BOTTOM: Hukou Waterfall in the Yellow River. Photo by: Wikimedia The first in a two-part series In what ways did geography allow for the establishment of villages and towns — some of which grew into cities — in various regions of East Asia? What role did climate play in enabling powerful states and civilizations to appear in some areas while other locations remained better suited for a nomadic lifestyle? Let's begin to answer these questions with a story about floods in China. China's two great rivers — the Yangtze and the Yellow — have flooded regularly for as long as we can measure in the historical and geological record. Catastrophic floodwaters This article is available at 5 reading levels at https://newsela.com. Nothing can compare, though, to the catastrophic floods of August 19, 1931. The Yangtze river rose an astonishing 53 feet above its normal level in just one day. It unleashed some of the most destructive floodwaters ever seen. The floods were caused by a "perfect storm" of conditions. Monsoon rains, heavy snowmelt, and unexpected rains pounded huge areas of southern China. All this water poured into the Yangtze. The river rose and burst its banks for hundreds of miles. -
Ecoregions of the Mississippi Alluvial Plain
92° 91° 90° 89° 88° Ecoregions of the Mississippi Alluvial Plain Cape Girardeau 73cc 72 io Ri Ecoregions denote areas of general similarity in ecosystems and in the type, quality, and quantity of This level III and IV ecoregion map was compiled at a scale of 1:250,000 and depicts revisions and Literature Cited: PRINCIPAL AUTHORS: Shannen S. Chapman (Dynamac Corporation), Oh ver environmental resources; they are designed to serve as a spatial framework for the research, subdivisions of earlier level III ecoregions that were originally compiled at a smaller scale (USEPA Bailey, R.G., Avers, P.E., King, T., and McNab, W.H., eds., 1994, Omernik, J.M., 1987, Ecoregions of the conterminous United States (map Barbara A. Kleiss (USACE, ERDC -Waterways Experiment Station), James M. ILLINOIS assessment, management, and monitoring of ecosystems and ecosystem components. By recognizing 2003, Omernik, 1987). This poster is part of a collaborative effort primarily between USEPA Region Ecoregions and subregions of the United States (map) (supplementary supplement): Annals of the Association of American Geographers, v. 77, no. 1, Omernik, (USEPA, retired), Thomas L. Foti (Arkansas Natural Heritage p. 118-125, scale 1:7,500,000. 71 the spatial differences in the capacities and potentials of ecosystems, ecoregions stratify the VII, USEPA National Health and Environmental Effects Research Laboratory (Corvallis, Oregon), table of map unit descriptions compiled and edited by McNab, W.H., and Commission), and Elizabeth O. Murray (Arkansas Multi-Agency Wetland Bailey, R.G.): Washington, D.C., U.S. Department of Agriculture - Forest Planning Team). 37° environment by its probable response to disturbance (Bryce and others, 1999). -
Fort Yukon Hunting / Unit 25
Fort Yukon Hunting / Unit 25 $UFWLF9LOODJH &KDQGDODU :LVHPDQ &KULVWLDQ &ROGIRRW 9HQHWLH &KDON\LWVLN )RUW<XNRQ %HDYHU %LUFK&UHHN 6WHYHQV9LOODJH )RUW+DPOLQ &LUFOH &HQWUDO 5DPSDUW /LYHQJRRG &LUFOH+RW6SULQJV (XUHND 0LQWR )R[ &KHQD )$,5%$1.6 +RW (DJOH 6SULQJV Federal Public Lands Open to Subsistence Use 2014/2016 Federal Subsistence Wildlife Regulations 115 Unit 25 / Hunting (See Unit 25 Fort Yukon map) Unit 25 consists of the Yukon River drainage upstream from (but excluding) the Hamlin Creek drainage; and excluding drainages into the south bank of the Yukon River upstream from the Charley River. Unit 25A consists of the Hodzana River drainage rivers; and drainages into the north bank of the Yukon River upstream from the Narrows; the Chandalar River drainage upstream from Circle, including the islands in the Yukon upstream from (and including) the East Fork drainage; River. the Christian River drainage upstream from Christian; the Unit 25C consists of drainages into the south bank of Sheenjek River drainage upstream from (and including) the the Yukon River upstream from Circle to the Unit 20E Thluichohnjik Creek; the Coleen River drainage; and the boundary; the Birch Creek drainage upstream from the Old Crow River drainage. Steese Highway bridge (milepost 147); the Preacher Creek Unit 25B consists of the Little Black River drainage drainage upstream from (and including) the Rock Creek upstream from (but excluding) the Big Creek drainage; drainage; and the Beaver Creek drainage upstream from the Black River drainage upstream from (and including) (and including) the Moose Creek drainage. the Salmon Fork drainage; the Porcupine River drainage Unit 25D consists of the remainder of Unit 25. -
Characteristics of the Distribution-Initiation-Motion-And
Characteristics of the Distribution, Initiation, Motion, and Evolution of the Thunderstorms over the Yangtze River Delta Region DAI Jianhua*, TAO Lan, and SUN Min Shanghai Central Meteorological Observatory China Meteorological Administration Shanghai, China * [email protected] Abstract —Using the WSR-88D Doppler Weather radar and Topography, surface features and the urban heat island all the Vaisala lightning detection data, some characteristics (the play important roles in YRD’s weather. In the YRD, for spatiotemporal distributions and motion features) of example like Shanghai, receives an average annual rainfall of thunderstorms over the Yangtze River Delta (YRD) region are 1,200 mm; nearly 60% of the precipitation comes during the investigated. Local storms tend to be cluster over cities, isolated April-September warm season. During July and September, mountains or hills, and water-land borders. Storm intensifying thunderstorms with lightning strikes, heavy rain, hail and centers are found about 10-30 km downwind of the city centers, damaging winds (squalls) become frequent. On average there while the medium-path storms also show a downwind effect with are 15 rainy days and 8 thunderstorm days per month in the a distance of from medium-sized cities and centers of larger cities warm seasons. about 10 km farther than those of local storms. In Shanghai, sea- breeze front is found to be more important for local Using the WSR-88D Doppler Weather radar and the thunderstorm initiation and development than the urban heat Vaisala lightning detection data, some characteristics (the island effect. Vertical structure of storm cell and lightning spatiotemporal distributions and motion features) of activity during the evolutionary stages of several types of thunderstorms over the Yangtze River Delta region are thunderstorms are also analyzed, and a basic conceptual model investigated. -
“Major World Deltas: a Perspective from Space
“MAJOR WORLD DELTAS: A PERSPECTIVE FROM SPACE” James M. Coleman Oscar K. Huh Coastal Studies Institute Louisiana State University Baton Rouge, LA TABLE OF CONTENTS Page INTRODUCTION……………………………………………………………………4 Major River Systems and their Subsystem Components……………………..4 Drainage Basin………………………………………………………..7 Alluvial Valley………………………………………………………15 Receiving Basin……………………………………………………..15 Delta Plain…………………………………………………………...22 Deltaic Process-Form Variability: A Brief Summary……………………….29 The Drainage Basin and The Discharge Regime…………………....29 Nearshore Marine Energy Climate And Discharge Effectiveness…..29 River-Mouth Process-Form Variability……………………………..36 DELTA DESCRIPTIONS…………………………………………………………..37 Amu Darya River System………………………………………………...…45 Baram River System………………………………………………………...49 Burdekin River System……………………………………………………...53 Chao Phraya River System……………………………………….…………57 Colville River System………………………………………………….……62 Danube River System…………………………………………………….…66 Dneiper River System………………………………………………….……74 Ebro River System……………………………………………………..……77 Fly River System………………………………………………………...…..79 Ganges-Brahmaputra River System…………………………………………83 Girjalva River System…………………………………………………….…91 Krishna-Godavari River System…………………………………………… 94 Huang He River System………………………………………………..……99 Indus River System…………………………………………………………105 Irrawaddy River System……………………………………………………113 Klang River System……………………………………………………...…117 Lena River System……………………………………………………….…121 MacKenzie River System………………………………………………..…126 Magdelena River System……………………………………………..….…130 -
Alluvial Fans
GY 111 Lecture Notes D. Haywick (2008-09) 1 GY 111 Lecture Note Series Sedimentary Environments 1: Alluvial Fans Lecture Goals A) Depositional/Sedimentary Environments B) Alluvial fan depositional environments C) Sediment and rocks that form on alluvial fans Reference: Press et al., 2004, Chapter 7; Grotzinger et al., 2007, Chapter 18, p 449 GY 111 Lab manual Chapter 3 Note: At this point in the course, my version of GY 111 starts to diverge a bit from my colleagues. I tend to focus a bit more on sedimentary processes then they do mostly because we live in an area that is dominated by sedimentation and I figure that you should be as familiar as possible with the subject. As it turns out, the web notes are also more comprehensive than what you'll find in your text book A) Depositional/sedimentary environments Last time we met, we discussed how sediment moved from one place to another. Remember that sediment is produced in a lot of different locations, but it seldom stays where it is produced. The action of water, wind and ice transport it from the sediment source to the sediment sink. The variety of sediment sinks that exist on the planet is truly amazing. There are river basins, lakes, deserts, lagoons, swamps, deltas, beaches, barrier islands, reefs, continental shelves, the abyssal plains (very deep!), trenches (even deeper!) etc. As we discussed last time, these places are called depositional environments (also known as sedimentary environments). Each depositional environment may also have several subdivisions. For example, there are open beaches, sheltered beaches, shingle beaches, sand beaches, strandline beaches, even mud beaches. -
Physical Geography of the Punjab
19 Gosal: Physical Geography of Punjab Physical Geography of the Punjab G. S. Gosal Formerly Professor of Geography, Punjab University, Chandigarh ________________________________________________________________ Located in the northwestern part of the Indian sub-continent, the Punjab served as a bridge between the east, the middle east, and central Asia assigning it considerable regional importance. The region is enclosed between the Himalayas in the north and the Rajputana desert in the south, and its rich alluvial plain is composed of silt deposited by the rivers - Satluj, Beas, Ravi, Chanab and Jhelam. The paper provides a detailed description of Punjab’s physical landscape and its general climatic conditions which created its history and culture and made it the bread basket of the subcontinent. ________________________________________________________________ Introduction Herodotus, an ancient Greek scholar, who lived from 484 BCE to 425 BCE, was often referred to as the ‘father of history’, the ‘father of ethnography’, and a great scholar of geography of his time. Some 2500 years ago he made a classic statement: ‘All history should be studied geographically, and all geography historically’. In this statement Herodotus was essentially emphasizing the inseparability of time and space, and a close relationship between history and geography. After all, historical events do not take place in the air, their base is always the earth. For a proper understanding of history, therefore, the base, that is the earth, must be known closely. The physical earth and the man living on it in their full, multi-dimensional relationships constitute the reality of the earth. There is no doubt that human ingenuity, innovations, technological capabilities, and aspirations are very potent factors in shaping and reshaping places and regions, as also in giving rise to new events, but the physical environmental base has its own role to play. -
MIS 6) Loess (Dust) Accumulation in the Lower Danube at Harletz (Bulgaria
Quaternary Science Reviews 207 (2019) 80e100 Contents lists available at ScienceDirect Quaternary Science Reviews journal homepage: www.elsevier.com/locate/quascirev A remarkable Late Saalian (MIS 6) loess (dust) accumulation in the Lower Danube at Harletz (Bulgaria) * Pierre Antoine a, , France Lagroix b, Diana Jordanova c, Neli Jordanova c, Johanna Lomax d, Markus Fuchs d, Maxime Debret e, Denis-Didier Rousseau f, g, Christine Hatte h, Caroline Gauthier h, Olivier Moine a, Samuel N. Taylor b, Jessica L. Till b, i, Sylvie Coutard j, a a Laboratoire de Geographie Physique: Environnements Quaternaires et Actuels, CNRS-Univ. Paris 1-UPEC, 92195, Meudon, France b Institut de Physique du Globe de Paris, Sorbonne Paris Cite, Univ Paris Diderot, UMR 7154 CNRS, 75005, Paris, France c National Institute of Geophysics, Geodesy and Geography, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Block 3, 1113, Sofia, Bulgaria d Department of Geography, Justus-Liebig-University Giessen, 35390, Giessen, Germany e UFR Sciences et Techniques, Universite de Rouen, 76821, Mont-Saint-Aignan, France f Laboratoire de Meteorologie Dynamique, UMR CNRS-ENS 8539, Institute Pierre Simon Laplace, IPSL, Paris Sciences & Lettres (PSL) Research University, 75231, Paris, France g Lamont-Doherty Earth Observatory of Columbia University, Palisades, NY, 10964, USA h Laboratoire des Sciences du Climat et de l’Environnement, CEA-CNRS-UVSQ, Universite Paris-Saclay, 91198, Gif-sur-Yvette, France i Institute of Earth Sciences, University of Iceland, 101 Reykjavik, Iceland j INRAP Hauts-de-France, 32 Avenue de l’Etoile du Sud, 80440, Glisy, France article info abstract Article history: While numerous high-resolution studies concerning Last Glacial aeolian sequences are available for Received 16 April 2018 Europe, the approach of the penultimate glacial in this geographical area is still poorly developed. -
Chapter Five
CHAPTER 5: CONSULTATION AND COORDINATION Chapter 5: Consultation and Coordination 5 Consultation and Coordination 5.1 Introduction This section summarizes the public and agency outreach program the United States Fish and Wildlife Service (Service) has undertaken for the proposed land exchange. Pre-scoping meetings were held in early 2005, before the Environmental Impact Statement (EIS) was initiated, in Anchorage, Arctic Village, Beaver, Birch Creek, Central, Chalkyitsik, Circle, Fairbanks, Fort Yukon, Stevens Village, and Venetie. These meetings provided the public with the opportunity to review the Agreement in Principle (Appendix A) and the Service document, “Evaluation and Review of a Proposed Land Exchange and Acquisition of Native Lands,” and were part of a 6- month comment period. In response to requests from the public and from Doyon, Limited (Doyon), the Service agreed to prepare an EIS and engage in the second phase of outreach, formal scoping. 5.2 Formal Scoping The Service published a Notice of Intent for the Proposed Land Exchange in the Federal Register on October 19, 2005 (Federal Register, Volume 70, Number 201, Pages 60845-60846). The Notice of Intent included a summary of the proposed project, the draft alternatives, and issues of concern raised during pre-scoping. A separate notice published in the Federal Register on March 3, 2006 (Federal Register, Volume 71, Number 42, Page 10988), announced the locations, dates, and times of public scoping meetings in Anchorage and Fairbanks, and names of Yukon Flats villages where scoping meetings were to be held. The March 3, 2006, notice stated that comments would be accepted until April 15, 2006. -
Traditional Ecological Knowledge and Biological Sampling of Nonsalmon Fish Species in the Yukon Flats Region, Alaska
Technical Paper No. 362 Traditional Ecological Knowledge and Biological Sampling of Nonsalmon Fish Species in the Yukon Flats Region, Alaska by Michael Koskey, University of Alaska Fairbanks and Kristin Mull, Bureau of Land Management May 2011 Alaska Department of Fish and Game Division of Subsistence Symbols and Abbreviations The following symbols and abbreviations, and others approved for the Système International d'Unités (SI), are used without definition in the reports by the Division of Subsistence. All others, including deviations from definitions listed below, are noted in the text at first mention, as well as in the titles or footnotes of tables, and in figure or figure captions. Weights and measures (metric) General Mathematics, statistics centimeter cm Alaska Administrative Code AAC all standard mathematical signs, symbols deciliter dL all commonly-accepted and abbreviations gram g abbreviations e.g., alternate hypothesis HA hectare ha Mr., Mrs., base of natural logarithm e kilogram kg AM, PM, etc. catch per unit effort CPUE kilometer km all commonly-accepted coefficient of variation CV liter L professional titles e.g., Dr., Ph.D., common test statistics (F, t, 2, etc.) meter m R.N., etc. confidence interval CI milliliter mL at @ correlation coefficient (multiple) R millimeter mm compass directions: correlation coefficient (simple) r east E covariance cov Weights and measures (English) north N degree (angular ) ° cubic feet per second ft3/s south S degrees of freedom df foot ft west W expected value E gallon gal copyright greater than > inch in corporate suffixes: greater than or equal to mile mi Company Co. harvest per unit effort HPUE nautical mile nmi Corporation Corp. -
Controls on Recent Alaskan Lake Changes Identified from Water Isotopes and Remote Sensing Lesleigh Anderson USGS, [email protected]
University of Nebraska - Lincoln DigitalCommons@University of Nebraska - Lincoln USGS Staff -- ubP lished Research US Geological Survey 2013 Controls on recent Alaskan lake changes identified from water isotopes and remote sensing Lesleigh Anderson USGS, [email protected] Jennifer Rover Earth Resource Observation and Science, U.S. Geological Survey Nikki Gaulager Yukon Flats National Wildlife Refuge Jean Birks Alberta Innovates Technology Futures Follow this and additional works at: http://digitalcommons.unl.edu/usgsstaffpub Part of the Geology Commons, Oceanography and Atmospheric Sciences and Meteorology Commons, Other Earth Sciences Commons, and the Other Environmental Sciences Commons Anderson, Lesleigh; Rover, Jennifer; Gaulager, Nikki; and Birks, Jean, "Controls on recent Alaskan lake changes identified from water isotopes and remote sensing" (2013). USGS Staff -- Published Research. 801. http://digitalcommons.unl.edu/usgsstaffpub/801 This Article is brought to you for free and open access by the US Geological Survey at DigitalCommons@University of Nebraska - Lincoln. It has been accepted for inclusion in USGS Staff -- ubP lished Research by an authorized administrator of DigitalCommons@University of Nebraska - Lincoln. GEOPHYSICAL RESEARCH LETTERS, VOL. 40, 3413–3418, doi:10.1002/grl.50672, 2013 Controls on recent Alaskan lake changes identified from water isotopes and remote sensing Lesleigh Anderson,1 Jean Birks,2 Jennifer Rover,3 and Nikki Guldager4 Received 13 May 2013; revised 13 June 2013; accepted 16 June 2013; published 12 July 2013. [1] High-latitude lakes are important for terrestrial carbon regions [Riordan et al., 2006; Smith et al., 2005]. Lake sur- dynamics and waterfowl habitat driving a need to better face observations are available in Alaska from early aerial understand controls on lake area changes.