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Characteristics and Importance of Rill and Gully Erosion: a Case Study in a Small Catchment of a Marginal Olive Grove
Cuadernos de Investigación Geográfica 2015 Nº 41 (1) pp. 107-126 ISSN 0211-6820 DOI: 10.18172/cig.2644 © Universidad de La Rioja CHARACTERISTICS AND IMPORTANCE OF RILL AND GULLY EROSION: A CASE STUDY IN A SMALL CATCHMENT OF A MARGINAL OLIVE GROVE E.V. TAGUAS1*, E. GUZMÁN1, G. GUZMÁN1, T. VANWALLEGHEM1, J.A. GÓMEZ2 1Rural Engineering Department/ Agronomy Department, University of Cordoba, Campus Rabanales, Leonardo Da Vinci building, 14071 Córdoba, Spain. 2Institute for Sustainable Agriculture, CSIC, Apartado 4084, 14080 Córdoba, Spain. ABSTRACT. Measurements of gullies and rills were carried out in an olive or- chard microcatchment of 6.1 ha over a 4-year period (2010-2013). No tillage management allowing the development of a spontaneous grass cover was imple- mented in the study period. Rainfall, runoff and sediment load were measured at the catchment outlet. The objectives of this study were: 1) to quantify erosion by concentrated flow in the catchment by analysis of the geometric and geomor- phologic changes of the gullies and rills between July 2010 and July 2013; 2) to evaluate the relative percentage of erosion derived from concentrated runoff to total sediment yield; 3) to explain the dynamics of gully and rill formation based on the hydrological patterns observed during the study period; and 4) to improve the management strategies in the olive grove. Control sections in gullies were established in order to get periodic measurements of width, depth and shape in each campaign. This allowed volume changes in the concentrated flow network to be evaluated over 3 periods (period 1 = 2010-2011; period 2 = 2011-2012; and period 3 = 2012-2013). -
Alluvial Fans in the Death Valley Region California and Nevada
Alluvial Fans in the Death Valley Region California and Nevada GEOLOGICAL SURVEY PROFESSIONAL PAPER 466 Alluvial Fans in the Death Valley Region California and Nevada By CHARLES S. DENNY GEOLOGICAL SURVEY PROFESSIONAL PAPER 466 A survey and interpretation of some aspects of desert geomorphology UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1965 UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY Thomas B. Nolan, Director The U.S. Geological Survey Library has cataloged this publications as follows: Denny, Charles Storrow, 1911- Alluvial fans in the Death Valley region, California and Nevada. Washington, U.S. Govt. Print. Off., 1964. iv, 61 p. illus., maps (5 fold. col. in pocket) diagrs., profiles, tables. 30 cm. (U.S. Geological Survey. Professional Paper 466) Bibliography: p. 59. 1. Physical geography California Death Valley region. 2. Physi cal geography Nevada Death Valley region. 3. Sedimentation and deposition. 4. Alluvium. I. Title. II. Title: Death Valley region. (Series) For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C., 20402 CONTENTS Page Page Abstract.. _ ________________ 1 Shadow Mountain fan Continued Introduction. ______________ 2 Origin of the Shadow Mountain fan. 21 Method of study________ 2 Fan east of Alkali Flat- ___-__---.__-_- 25 Definitions and symbols. 6 Fans surrounding hills near Devils Hole_ 25 Geography _________________ 6 Bat Mountain fan___-____-___--___-__ 25 Shadow Mountain fan..______ 7 Fans east of Greenwater Range___ ______ 30 Geology.______________ 9 Fans in Greenwater Valley..-----_____. 32 Death Valley fans.__________--___-__- 32 Geomorpholo gy ______ 9 Characteristics of fans.._______-___-__- 38 Modern washes____. -
Newsletter Varnish
The Cover The outlook's bleak for the future of passenger trains in Newfoundland, as our report on page 78 indicates. In a matter of months, buses will appear on the St. John's- Port aux Basques run, phasing out CN's narrow gauge newsletter varnish. Here's the easthound Caribou waiting for its westbound counterpart at Cooke siding in June, 1967. — Tom Henry Number 270 Published monthly by the Upper Canada Railway Society, Inc., Box 122, Terminal A, Toronto, Ont. James A. Brown, Editor Coming Events :.:.:.;-:.:.;.:.:.:.:.:.:.;.;.:.:.x-:.;'X-:':':-;-:-:'X-:w^^^^^ Regular meetings of the Society are held on the third Friday of Authorized as Second Class Matter by the Post Office Department, each month (except July and August) at 589 Mt. Pleasant Road, Ottawa, Ont. and for payment of postage in cash. Toronto, Ontario. 8.00 p.m. Members are asked to give the Society at least five weeks notice of address changes. Aug 16: Summer meeting and social night at 589 Mt. (Fri) Pleasant Road, featuring refreshments and pro• fessional films of rail interest. Sept 20: Regular Meeting. Please address NEWSLETTER contributions to the Editor at (Fri) 3 Bromley Crescent, Bramalea, Ontario. No responsibility is assumed for loss or nonreturn of material. All other Society business, including membership inquiries, should be addressed to UCRS, Box 122, Terminal A, Toronto, Ontario. Contributors: John Bromley, Reg Button, Tom Henry, Bill Hood, George Horner, Omer Lavallee, Boh McMann, Ernie Modler, Steve Munro, John Thompson, Ted Wickson. Production: John Bromley, Tom Henry, Omer Lavallee. Distribution: Chas. Bridges, George Meek, Bill Miller, Steve Munro, John Thompson, Ted Wickson. -
SCI Lecture Paper Series
SCI LECTURE PAPERS SERIES HIGHWAY DRAINAGE SYSTEMS Santi V Santhalingam Highways Agency, Room 4/41, St. Christopher House Southwark Street, London SE1 0TE Telephone +44 (0) 171 921 4954 Fax +44 (0) 171 921 4411 © Highways Agency 1999 copyright reserved ISSN 1353-114X LPS 102/99 Key words highways, drainage, runoff, surface, sub-surface, systems INTRODUCTION Appropriate drainage is an important feature of good highway design in terms of ensuring required level of service and value for money are achieved. Highway drainage has two major objectives: safety of the road user and longevity of the pavement. Speedy removal of surface water will help to ensure safe and comfortable conditions for the road user. Provision of effective sub-drainage will maximise longevity of the pavement and its associated earthworks. Highway drainage can therefore be broadly classified into two elements – surface run-off and sub-surface run-off: these two elements are not completely disparate in that some of the surface water may find its way into the road foundation through surfaces which are not completely impermeable thence requiring removal by sub-drainage. Based on these fundamental principles, drainage methods in the UK are broadly divided into two categories: (a) combined systems, where the surface and sub-surface water are collected and transported in the same pipe, and (b) separate systems, where the two elements are collected and transported in separate pipes Within the broader definition of the two systems there are a number of different drainage methods that are in use on UK highways, some of them more common than others. -
Regional Geology of the Scotian Basin
REGIONAL GEOLOGY OF THE SCOTIAN BASIN David E. Brown, CNSOPB, 2008 INTRODUCTION The Scotian Basin is a classic passive, mostly non-volcanic, conjugate margin. It represents over 250 million years of continuous sedimentation recording the region's dynamic geological history from the initial opening of the Atlantic Ocean to the recent post-glacial deposition. The basin is located on the northeastern flank of the Appalachian Orogen and covers an area of approximately 300,000 km2 with an estimated maximum sediment thickness of about 24 kilometers. The continental-size drainage system of the paleo-St. Lawrence River provided a continuous supply of sediments that accumulated in a number of complex, interconnected subbasins. The basin's stratigraphic succession contains early synrift continental, postrift carbonate margin, fluvial-deltaic-lacustrine, shallow marine and deepwater depositional systems. PRERIFT The Scotian Basin is located offshore Nova Scotia where it extends for 1200 km from the Yarmouth Arch / United States border in the southwest to the Avalon Uplift on the Grand Banks of Newfoundland in the northeast (Figure 1). With an average breadth of 250 km, the total area of the basin is approximately 300,000 km2. Half of the basin lies on the present-day continental shelf in water depths less than 200 m with the other half on the continental slope in water depths from 200 to >4000 m. The Scotian Basin formed on a passive continental margin that developed after North America rifted and separated from the African continent during the breakup of Pangea (Figure 2). Its tectonic elements consist of a series of platforms and depocentres separated by basement ridges and/or major basement faults. -
Canadian Rail No162 1965
<:;an..adi J~mnn Number 162 / Janua r y 1965 Cereal box coupons and soap package enclosures do not general ly excite much enthusiasm from the editor of 'Canadian Rail', but we must admit we are looking forward with some eagerness to comp leting our collection of RAILWAY MUGS currently being distribut e d by the Quaker Oats Company, in their specially-marked packages of Quaker Oats. This series of twelve hot chocolate mugs depicts the develop - ment of the steam locomotive in Canada from the 0-6-0 "Samson", to the CPR 2-10-4 #8000. The mugs are being offered by the Quaker Oats Company of Cana da to salute Canada's Centennial, and the part played by the rail ways and their steam locomotives in furthering the pro ~ ress of the nation. Each cup pictures an authentic locomotive design -- one shows a Canadian Northern 2-8-0, a type of locomotive that made a major contribution to the country's prairie economy by moving grain from the Western provinces to the Lakehead -- another shows one of the Canadian Pacific's ubiquitous D-10 engines. There are 12 different locomotives in the series - each a col lector's item. The reproductions are precisely etched in decora tive colours and trimmed with 22k gold. Canadian Rail Par,e 3 &eee_eIPIrWB __waBS} -- E.L.Modler. Once a Ga in this year, the Canadian National Railways has leased a number of road switcher type diesels from the Duluth, Missabe and Iron Range Railroad. :,ihile last year all the uni ts leased from the D.I.L& I.R. -
Country Note on Fisheries Management Systems -- Canada
COUNTRY NOTE ON FISHERIES MANAGEMENT SYSTEMS -- CANADA 1. Overview of Canadian Fisheries 1. Canada has traditionally benefited from the abundant fisheries resources in some of the world’s most productive marine and freshwater systems. These rich fisheries resources have maintained an important fishing industry that provides employment and supports the livelihood of hundreds of small communities in coastal areas. 2. In addition, there is a large recreational fisheries sector comprised of some 3.6 million anglers with annual expenditures of close to CAD 4.7 billion exclusively on sport fishing activities and investments. Furthermore, fishing has been entrenched in the daily life of Canadian aboriginal people in more than 300 First Nations who participate in fisheries for food, social and ceremonial purposes. 3. Aside from capture fisheries, aquaculture has been growing rapidly in Canada. In 1986, the total farm gate value of aquaculture was CAD 35 million. By 2000, production had increased to CAD 600 million, of which 81% was salmon. Trout, mussels and oysters are also major aquaculture species. 4. Canada’s commercial fisheries operate in three broad regions - along the Atlantic and Pacific coasts and inland (mainly near the Great Lakes and Lake Winnipeg). The last decade has seen major changes in the Canadian commercial fisheries on both coasts. The collapse of the Atlantic groundfishery in the early 1990s and the subsequent failure of Pacific salmon fishery in the mid-1990s -- the two traditional staple species in the Atlantic and Pacific fisheries respectively -- have completely changed the landscape of the Canadian fishing industry. 5. The rapid expansion of shrimp and crab fisheries along with continuing strong price performance for shellfish in general, have not only made shellfish the most dominant sector on the Atlantic coast but also brought the overall landed value past the historical record prior to the groundfish moratoria. -
Community Management in the Inshore Groundfish Fishery on the Canadian Scotian Shelf
101 Community management in the inshore groundfish fishery on the Canadian Scotian Shelf F.G. Peacock Fisheries and Oceans Canada, Maritimes Region PO Box 1035, Dartmouth Nova Scotia, B2Y 4T3 Canada [email protected] Christina Annand Fisheries and Oceans Canada, Maritimes Region PO Box 1035, Dartmouth Nova Scotia, B2Y 4T3 Canada [email protected] 1. HISTORY LEADING TO COMMUNITY MANAGEMENT The groundfish fishery in Atlantic Canada is arguably the most complex fishery in Canada. Groundfish is the generalized term for a number of species of fish, mostly gadoid that are harvested separately or collectively by many fleets involving thousands of fishermen throughout Atlantic Canada. This chapter will focus on the inshore, fixed-gear sector of relatively small, inshore vessels 10–14 metres in length. This sector uses handline, longline and gillnet gear to harvest groundfish along the Scotian Shelf, in the Bay of Fundy and on Georges Bank (see Figure 1). Groundfish fishing by this sector involves seven separate and distinct fleets harvesting mostly cod, haddock, pollock, flatfish, halibut, redfish and a variety of bycatch species. Following establishment of the 200-mile limit in 1977, Canada began to develop an extensive domestic groundfish fishery that utilized both inshore and offshore fixed and mobile gear. Harvest expansion in the 1980s was followed by significant declines in species populations and associated harvest levels. Harvest moratoria were implemented for several cod resources in Atlantic Canada FIGURE 1 during the early 1990s and several of these Scotian Shelf, Bay of Fundy, and Georges Bank fishing areas moratoria continue today. On the Scotian Shelf, these included haddock stocks and cods stocks in areas 4V and 4W. -
Regional Drainage Plan and Environmental Investigation for Major Tributaries in the Cypress Creek Watershed TWDB Contract No
Regional Drainage Plan and Environmental Investigation for Major Tributaries in the Cypress Creek Watershed TWDB Contract No. 2000-483-356 Table C3: 100-Year Flow Comparison Table (Baseline vs. Recommended Plan) HEC-1 Analysis Baseline Recommended Baseline vs. Recommended Plan Point Condition (cfs) Condition (cfs)· Difference (cfs) "10 Change K12402#1 2073 2073 0 -- K12402#2 2445 2445 0 -- K124A 1784 1614 -170 -10 K124#1 2278 1901 -377 -16 K124#2US 2933 2456 -477 -16 K124#2DS 5234 4842 -392 -7 K124#3 5989 5569 -420 -7 K124#4 6448 5433 -1015 -16 Table C4' HEC-1 Peak Flow Rates for Recommended Plan Conditions· HEC-1 Analysis Point 2-Year S-Year 10-Year 2S-Year SO-Year 100-Year 2S0-Year SOO-Year (cis) (cis) (cis) (cis) (cis) (cis) (cis) ~cls) K12402#1 746 1124 1377 1625 1844 2073 2376 2599 K12402#2 937 1428 1729 1973 2199 2445 2788 3049 K124A 588 881 1076 1269 1436 1614 1845 2017 K124#1 694 1042 1270 1496 1692 1901 2162 2358 K124#2US 889 1339 1636 1934 2184 2456 2797 3048 K124#2DS 1813 2745 3355 3883 4346 4842 5510 6026 K124#3 2136 3182 3898 4507 4999 5569 6328 6912 K124#4A 2325 3466 4221 4878 5407 6027 6839 7462 K124#4 2325 3466 4145 4653 5022 5433 5953 6349 February 2003 FINAL REPORT Page 20 Appendix C - Seals Gully (HCFC Unit I.D. #KI24-00-00) Regional Drainage Plan and Environmental Investigation for Major Tributaries in the Cypress Creek Watershed TWDB Contract No. 2000-483-356 Table C5: Comparison of Water Surface Elevations (100-Year) Seals Gully (K124-00-00' Baseline Condition Recommended Plan Difference Station Location Flow WSEL -
Technical Supplement 14P--Gullies and Their Control
Technical Gullies and Their Control Supplement 14P (210–VI–NEH, August 2007) Technical Supplement 14P Gullies and Their Control Part 654 National Engineering Handbook Issued August 2007 Cover photo: Gully erosion may be a significant source of sediment to the stream. Gullies may also form in the streambanks due to uncontrolled flows from the flood plain (valley trenches). Advisory Note Techniques and approaches contained in this handbook are not all-inclusive, nor universally applicable. Designing stream restorations requires appropriate training and experience, especially to identify conditions where various approaches, tools, and techniques are most applicable, as well as their limitations for design. Note also that prod- uct names are included only to show type and availability and do not constitute endorsement for their specific use. (210–VI–NEH, August 2007) Technical Gullies and Their Control Supplement 14P Contents Purpose TS14P–1 Introduction TS14P–1 Classical gullies and ephemeral gullies TS14P–3 Gullying processes in streams TS14P–3 Issues contributing to gully formation or enlargement TS14P–5 Land use practices .........................................................................................TS14P–5 Soil properties ................................................................................................TS14P–6 Climate ............................................................................................................TS14P–6 Hydrologic and hydraulic controls ..............................................................TS14P–6 -
Gully Erosion and Its Causes
Gully Erosion – Part 1 GULLY EROSION AND ITS CAUSES Gully erosion – “A complex of processes whereby the removal of soil is characterised by incised channels in the landscape.” NSW Soil Conservation Service, 1986. Photo 1 – Head of gully erosion (Qld) Photo 2 – Rural gully erosion (SA) Introduction Gully erosion is usually distinguished from the boarder term ‘watercourse erosion’ by the path the erosion follows, which is normally along an overland flow path rather than along a creek. Prior to the occurrence of the gully erosion, the overland flow path would likely have carried only shallow concentrated flows conveying stormwater runoff to a down-slope watercourse. Gully erosion, however, can also occur within a watercourse, typically within the upper reaches, and typically resulting from an active ‘head-cut’ migrating rapidly up the valley. Gully erosion is best characterised as a ‘bed instability’ that subsequently causes in ‘bank instabilities’. Unstable banks maybe the most visible aspect of gully erosion; but stabilisation of a gully normally needs to start with stabilisation of the gully bed. The mechanics of gully erosion Most gullies start out as shallow overland flow paths that carry flows only during periods of heavy rainfall (Figure 1). An extraordinary event of some type causes an initial erosion point or ‘nick’ point (Photo 3) to form somewhere along the drainage path. A bell-shaped scour hole sometimes forms at the head of the gully (Photo 4), which is usually deeper than the immediate downstream gully bed. Photo 3 – ‘Nick’ point representing the Photo 4 – Early stage of gully erosion early stages of gully erosion (SA) within an urban overland flow path (Qld) © Catchments & Creeks Pty Ltd April 2010 Page 1 The initial nick point usually occurs at the downstream end of the gully, and usually at a significant change in grade along the flow path, such as the point where the overland flow spills into a watercourse. -
Gum Gully (Unclassified Water Body) Segment: 0508B Sabine River Basin
2002 Texas Water Quality Inventory Page : 1 (based on data from 03/01/1996 to 02/28/2001) Gum Gully (unclassified water body) Segment: 0508B Sabine River Basin Basin number: 5 Basin group: A Water body description: From the confluence of Adams Bayou to the upstream perennial portion of the stream northwest of Orange in Orange County Water body classification: Unclassified Water body type: Freshwater Stream Water body length / area: 3.5 Miles Water body uses: Aquatic Life Use, Contact Recreation Use, Fish Consumption Use Standards Not Met and Concerns in Previous Years Support Status Assessment Area Use or Concern Parameter Category Entire creek Aquatic Life Use Not Supporting depressed dissolved oxygen 5c Entire creek Contact Recreation Use Not Supporting bacteria 5c Additional Information: The fish consumption use was not assessed. This water body was identified on the 2000 303(d) List as not supporting the contact recreation use due to bacteria. Because there were insufficient data available in 2002 to evaluate changes in water quality, this water body will be identified as not meeting the standard for bacteria until sufficient data are available to demonstrate use support. This water body was also identified on the 2000 303(d) List as not supporting the aquatic life use due to depressed dissolved oxygen. Because an insufficient number of 24-hour dissolved oxygen values were available in 2002 to determine if the criterion is supported, this water body will be identified as not meeting the standard for dissolved oxygen until sufficient 24-hour measurements are available to demonstrate support of the criterion.