Free Essay

Explain How Urban Structures and Layout Affect Winds. 8 Marks

In: Other Topics

Submitted By ahmadusama17
Words 258
Pages 2
Urban structures and layout affect winds in that friction from urban structures and tall buildings cause winds to lose energy and to be diverted (respectively) ultimately leading in calm conditions and light winds. When moving through an urban area winds must pass through areas of skyscrapers, oddly shaped buildings and brick built structures. Energy is lost when the movement of air encounters friction and hinders its ability to move as fast.
Friction van be small scale such as rough surface of brick buildings or large scale such as large tall structures which wind must go around. This results in a reduction of wind speeds in urban areas. Also the more densely built up an area is the less wind has an effect as the air must be diverted around many structures and can in fact be diverted round the area altogether. In terms of layout, parallel built streets, especially long narrow streets with buildings either side can cause wind to be funnelled down these passages creating ‘wind tunnels’ where wind speeds increase greatly, this increases the average wind speed of an urban area. The same effect occurs with narrow passages/gaps between tall buildings, wind is forced through in a wind tunnel creating high speed winds. In urban areas with a less structured layout eg wide streets with building s of moderate height set out in an unparallel layout, wind is less affected whilst speed is still reduced by friction, the occurrence of wind tunnels is less as the conditions are not conducive to such an event.

Similar Documents

Free Essay

Exam Questions

...Sect A Plate Tec(7 marks) | Sect APlate tec(8 marks) | Sect A Plate tec(10 marks) | | Sect CPlate tec essay (40 marks) | June 2010 | Study fig 1 a photo …recent earthquake. Using fig 1 only, comment on the evidence that suggest that an earthquake has recently taken place | Describe how seismic waves and earthquakes can be measured | With reference to two seismic events you have studied from contrasting areas of the world, compare the ways in which earthquakes and their impacts have been managed | | “The hazards presented by volcanic and seismic events have the greatest impact on the world’s poorest people” To what extent do you agree with this view? | Jan 2011 | Study fig 1, a map showing tectonic features in the Philippines. Comment on the degree to which the area of the Philippines might be subject to tectonic hazards | Outline the formation of hot spots and explain their relationship to plate movement | With reference to 2 volcanic events that you have studied from contrasting areas of the world, compare the nature of the volcanic hazard and its impact | | “Volcanic and seismic events are major pieces of evidence towards proving that plate tectonics theory is valid”. Discuss the extent to which you agree with this statement. | June 2011 | Study fig 1 which is an image of the sea bed of the N Atlantic Ocean … Comment on the extent to which the features shown support the theory of plate tectonics. | Describe the characteristics of, and explain the formation of, minor...

Words: 1106 - Pages: 5

Free Essay

Discuss Weather and Climate

... (7) (b) Explain the characteristic features of the weather associated with a winter anticyclone in the British Isles. (8) (c) Evaluate the concept of the urban heat island. (10) Critically evaluate the possible effects of the phenomenon known as global warming and suggest possible responses to them. (40) Weather, Climate and associated Hazards - Sample Paper 2 - Study Figure 2, a diagram showing the impact of Hurricane Floyd 1999. (a) Using Figure 2, comment on the responses to Hurricane Floyd in September 1999. (7) (b) Explain the causes of tropical revolving storms. (8) (c) With reference to one tropical region that you have studied, describe and explain the characteristic features of the climate of that region. (10) “Urban areas have a significant impact on climatic characteristics.” Discuss this statement. (40) Exam Board Approved Back of Textbook Sample Paper (a) Study figure 2 which shows the global origins and occurrences of tropical storms. Describe and account for the distribution of tropical storms and their travel paths. (7) (b) Explain how urban temperatures can differ from the temperatures of surrounding rural areas, and why these differences occur. (8) (c) With reference...

Words: 500 - Pages: 2

Free Essay

Teacher's Guide

............ 4 Chapter 1: What is geography? ........................................... 7 Chapter 2: Geographical Skills ........................................... 11 Chapter 3: Our Earth ......................................................... 15 Chapter 4: Atmosphere and weather ................................. 19 Chapter 5: Our World—the main features of the Earth’s surface ................................................. 25 Chapter 6: Asia—our region of the world .......................... 29 Chapter 7: Pakistan—our homeland.................................. 34 Chapter 8: Pakistan—economic activities ......................... 40 Introduction to the series Explore is a new, up-to-date geography series for secondary classes 6–8. The series covers all the geographical topics and learning competencies from the Pakistan National Curriculum for Geography. Guided by the structure of the Curriculum, from Book 1 to Book 3 the focus gradually switches from local (including the geography of Pakistan) to global (world issues such as forest clearances, population and big city growth, and globalization). However, this is done not by simply following the exact sequence of the written curriculum, but by identifying and developing particular topics and themes in context with the world around us, in order to make the learning process more student-friendly and relevant. Explore consists of three components: the Students’ Books, Workbooks, and the Teachers’ Guides....

Words: 15071 - Pages: 61

Premium Essay

Theme Park Design Guidelines

...Park Design Guidelines & Data Province of British Columbia Ministry of Environment Lands and Parks A NATURAL LANDSCAPE ARCHITECTURE FOR BRITISH COLUMBIA’S PROVINCIAL PARKS BC PARKS: PARK DESIGN GUIDELINES & DATA Overview Simplicity in design and restraint in construction creates park facilities suited to what attracts visitors in the first place – recreation in the natural park landscape. q The aim of Park Design Guidelines & Data is to help BC Parks staff use their park expertise to produce appropriate facility landscapes. These guidelines identify design criteria and planning processes for BC Parks staff to provide sustainable, appropriate park recreation facilities. They promote facility design that requires the least visible development. q A design approach to visitor facilities is defined that: Recognizing the facilities are an integral part of a park means reducing the impact of use and basing planning and design decisions on local and regional considerations – for the park environment’s long term health. Maintaining natural park landscapes and environments will help ensure the quality of visitor experiences now and in the future. At neighbouring Bromley Rock Provincial Park and Stemwinder Provincial Park, illustrated left, natural site elements create facilities that blend into the natural park landscapes. These examples show the careful expenditure of resources and the thoughtful use of native materials...

Words: 32924 - Pages: 132

Free Essay

Meteorological Instruments

...Guide to Meteorological Instruments and Methods of Observation WMO-No. 8 Guide to Meteorological Instruments and Methods of Observation WMO-No. 8 Seventh edition 2008 WMO-No. 8 © World Meteorological Organization, 2008 The right of publication in print, electronic and any other form and in any language is reserved by WMO. Short extracts from WMO publications may be reproduced without authorization, provided that the complete source is clearly indicated. Editorial correspondence and requests to publish, reproduce or translate this publication in part or in whole should be addressed to: Chairperson, Publications Board World Meteorological Organization (WMO) 7 bis, avenue de la Paix P.O. Box No. 2300 CH-1211 Geneva 2, Switzerland ISBN 978-92-63-10008-5 NOTE The designations employed in WMO publications and the presentation of material in this publication do not imply the expression of any opinion whatsoever on the part of the Secretariat of WMO concerning the legal status of any country, territory, city or area, or of its authorities, or concerning the delimitation of its frontiers or boundaries. Opinions expressed in WMO publications are those of the authors and do not necessarily reflect those of WMO. The mention of specific companies or products does not imply that they are endorsed or recommended by WMO in preference to others of a similar nature which are not mentioned or advertised. Tel.: +41 (0) 22 730 84 03 Fax: +41 (0) 22 730 80 40 E-mail: publications@wmo...

Words: 216230 - Pages: 865

Premium Essay

Agricultural Science Sylabus

...CARIBBEAN EXAMINATIONS COUNCIL Caribbean Secondary Education Certificate CSEC AGRICULTURAL SCIENCE SYLLABUS Effective for examinations from May/June 2008 CXC 07/G/SYLL 06 Published by the Caribbean Examinations Council © 2010, Caribbean Examinations Council All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form, or by any means electronic, photocopying, recording or otherwise without prior permission of the author or publisher. Correspondence related to the syllabus should be addressed to: The Pro-Registrar Caribbean Examinations Council Caenwood Centre 37 Arnold Road, Kingston 5, Jamaica, W.I. Telephone: (876) 630-5200 Facsimile Number: (876) 967-4972 E-mail address: cxcwzo@cxc.org Website: www.cxc.org Copyright © 2006, by Caribbean Examinations Council The Garrison, St Michael BB11158, Barbados CXC 07/G/SYLL 06 Content RATIONALE ........................................................................................................................................... 1 AIMS ........................................................................................................................................................ 1 CAREER CHOICES ............................................................................................................................... 2 SUGGESTED RESOURCES ...............................................................................................

Words: 11571 - Pages: 47

Free Essay

Traffic Engineering

...Traffic Engineering Design This page intentionally left blank Traffic Engineering Design Principles and Practice Second edition Mike Slinn MVA Limited, MVA House, Victoria Way, Woking GU21 1DD, UK Paul Matthews MVA Limited, Third Floor, One Berners Street, London W1T 3LA, UK Peter Guest 8 The Grove, Farnborough, Hampshire GU14 6QR, UK AMSTERDAM • BOSTON • HEIDELBERG • LONDON • NEW YORK • OXFORD PARIS • SAN DIEGO • SAN FRANCISCO • SINGAPORE • SYDNEY • TOKYO Elsevier Butterworth-Heinemann Linacre House, Jordan Hill, Oxford OX2 8DP 30 Corporate Drive, Burlington, MA 01803 First published by Arnold, 1998 Reprinted 2003 Second edition 2005 Copyright © 2005, Elsevier Ltd. All rights reserved. No part of this publication may be reproduced in any material form (including photocopying or storing in any medium by electronic means and whether or not transiently or incidentally to some other use of this publication) without the written permission of the copyright holder except in accordance with the provisions of the Copyright, Designs and Patents Act 1988 or under the terms of a license issued by the Copyright Licensing Agency Ltd, 90 Tottenham Court Road, London, England W1T 4LP. Applications for the copyright holder’s written permission to reproduce any part of this publication should be addressed to the publisher. Permissions may be sought directly from Elsevier’s Science and Technology Rights Department in Oxford, UK: phone: (ϩ44) (0) 1865 843830; fax: (ϩ44) (0) 1865 853333;...

Words: 83129 - Pages: 333

Free Essay

Maglev

...*3963103* [3963] – 103 T.E. (Petroleum) (Semester – I) Examination, 2011 DRILLING & PRODUCTION OPERATIONS (2003 Course) Time : 3 Hours Max. Marks : 100 Instructions : 1) Question Nos. 1 and 5 are compulsory. Out of the remaining attempt 2 questions from Section I and 2 questions from Section II. 2) Answers to the two Sections should be written in separate books. 3) Neat diagrams must be drawn wherever necessary. 4) Black figures to the right indicate full marks. 5) Use of Logarithmic Tables, Slide Rule, Mollier Charts, Electronic Pocket Calculator and Steam Tables is allowed. 6) Assume suitable data, if necessary. SECTION – I 1. What are different systems on a drilling rig ? Explain any one in detail with suitable diagramme. 18 2. a) Calculate Bottom hole pressure if well depth is 2500 m and mud weight is 1.2 gm/cc. b) Calculate mud weight if mud gradient is 0.87 psi/ft. ′ c) Calculate volume bbl/meter for drill pipe O.D. = 5′ inch and I.D. = 4.276 inch. 2 2 2 10 8 8 16 d) Draw circulation system on a drilling rig. 3. a) Discuss IADC classification of a bit in details. b) Discuss different factors affecting rate of penetration in details. 4. Write short note on : i) Coring ii) Fishing tools iii) BOP iv) Directional well P.T.O. [3963] – 103 -2- *3963103* SECTION – II 5. a) Discuss different types of casings and function of the casings in brief. b) Discuss different types of well completion techniques. 6. a) Discuss primary cementation process with...

Words: 172166 - Pages: 689

Premium Essay

Essay

...unit 1 Water cycle The water cycle, also known as the hydrologic cycle, describes the continuous movement of water on, above and below the surface of the Earth. Since the water cycle is truly a "cycle," there is no beginning or end. Water can change states among liquid, vapor, and ice at various places in the water cycle. Although the balance of water on Earth remains fairly constant over time, individual water molecules can come and go. Contents Description The sun, which drives the water cycle, heats water in the oceans. Water evaporates as vapor into the air. Ice and snow can sublimate directly into water vapor. Evapotranspiration is water transpired from plants and evaporated from the soil. Rising air currents take the vapor up into the atmosphere where cooler temperatures cause it to condense into clouds. Air currents move clouds around the globe, cloud particles collide, grow, and fall out of the sky as precipitation. Some precipitation falls as snow and can accumulate as ice caps and glaciers, which can store frozen water for thousands of years. Snowpacks can thaw and melt, and the melted water flows over land as snowmelt. Most precipitation falls back into the oceans or onto land, where the precipitation flows over the ground as surface runoff. A portion of runoff enters rivers in valleys in the landscape, with streamflow moving water towards the oceans. Runoff and groundwater are stored as freshwater in lakes. Not all runoff flows into rivers. Much of it soaks...

Words: 15993 - Pages: 64

Free Essay

Organizational Behaviour

...HUMAN BEHAVIOUR IN PUBLIC SPACES By VENETIN AGHOSTIN-SANGAR THESIS Submitted in partial fulfilment of the requirements for the degree of Bachelor of Planning within the Faculty of the Built Environment at the University of New South Wales, 2007 Sydney, NSW FACULTY OF THE BUILT ENVIRONMENT BACHELOR OF PLANNING Declaration Relating to Disposition of Undergraduate Thesis This is to certify that I, Venetin Aghostin-Sangar, being a student for the degree of Bachelor of Planning, am aware that the University reserves the right to retain at its own discretion the copy of my thesis submitted for examination. I consent to the thesis being placed in the Faculty Library, to be consulted there and to part(s) of this thesis being quoted in manuscripts or typescripts for the purpose of scholarship or research, provided my authorship is acknowledged. In the light of the Copyright Act (1968) I declare that I wish to grant the University further permission for the following actions provided my authorship is acknowledged: • Copy or allow others to copy in any medium the whole of the thesis for the purpose of scholarship or research; or • Publish or allow others to publish, the whole of the thesis. Signature: ……………………………………………………………………… Witness: ……………………………………………………………………… Date: 23rd February 2007 ii Acknowledgements I would like to express my gratitude to all those who dedicated their valuable time to assist in furthering the ideas that form this thesis. A sincere...

Words: 24152 - Pages: 97

Free Essay

Paper

...A NPSTC Public Safety Communications Report The National Public Safety Telecommunications Council is a federation of organizations whose mission is to improve public safety communications and interoperability through collaborative leadership. Defining Public Safety Grade Systems and Facilities Final Report 5/22/2014 Support to NPSTC provided by the U.S. Department of Homeland Security's Science and Technology Directorate, Office for Interoperability and Compatibility (OIC), and the National Protection and Programs Directorate, Office of Emergency Communications (OEC). Points of view or opinions expressed are those of the originators and do not necessarily represent the official position or policies of the U.S. Department of Homeland Security. American Association of State Highway and Transportation Officials | American Radio Relay League | Association of Fish and Wildlife Agencies | Association of Public Safety Communications Officials | Forestry Conservation Communications Association | International Association of Chiefs of Police | International Association of Emergency Managers | International Association of Fire Chiefs | International Municipal Signal Association | National Association of State Chief Information Officers | National Association of State Emergency Medical Services Officials | National Association of State Foresters | National Association of State Technology Directors | National Emergency Number Association | National Sheriffs’ Association 8191 Southpark...

Words: 44798 - Pages: 180

Premium Essay

Lalalal

...1 UNIT 1 Living Things and Their Environment DRAFT April 29, 2014 Photo Credit: http://www.flyingfourchette.com/2013/05/25/around-ubud/ 2 UNIT 1: Living Things and Their Environment Introduction At this point, students have already learned in Grade 8 how the body breaks down food into forms that can be absorbed through the digestive system and then transported to each cell, which was on the other hand discussed in Grade 7 to be the basic unit of life. The learners have also discovered that cells divide to produce new cells by mitosis and meiosis. They have understood that meiosis is an early step in sexual reproduction that leads to variation. Students have been introduced to genetics to be able to appreciate evolutionary differences among species. Learners have also found out that biodiversity is the collective variety of species living in an ecosystem, and by studying the ecosystem; they have come across the various cycling of materials and energy transformation. DRAFT April 29, 2014 All modules in Grade 9 Unit 1-Living Things and Their Environment present student-centered activities that will allow the learners to discover and develop concepts that they may consider useful to their everyday life. At the end of each lesson, key concepts are provided for the students to grasp ideas and information that they will remember even after they have left school. Instructional activities are designed to build up the students’ knowledge, understanding, skills, and ability to transfer...

Words: 68324 - Pages: 274

Free Essay

Non Conventional Energy Resources

...INTERMEDIATE VOCATIONAL COURSE Second Year NON-CONVENTIONAL ENERGY SOURCES For the Course of Rural Engineering Technician State Institute of Vocational Education Directorate of Intermediate Education Govt. of Andhra Pradesh, Hyderabad. 2005 Author Sri Shali Habibulla M.Tech (Ref & A/c), Hons. C.H.E. M.I.S.T.E. Department of Rural Engineering Technician Govt. Junior College (Boys) New, Town, ANANTAPUR - 515 001. Editor Sri K. Jagadish Junior Lecturer in R.E.T. Govt. Junior College Vmedugula - 531027. Vizag (Dist.) PREFACE The main objective of vocational education is to train the students at +2 level for meeting the demands for the skilled manpower in both organised and unorganised sectors and also to provide an alternative channel for those who aimlessly persue higher education and to prepare them for self reliance. The State Institute of Vocational Education (SIVE) in collaboration with the Board of Intermediate Education, Andhra Pradesh has developed curriculum for 43 vocational courses in the field of Engineering & Technology Agriculture Health & Paramedical Business & Commerce Home Science and Humanities Accordingly the text books have been developed by SIVE as per the restructured curriculum by utilizing the services of various professional teachers in the respective fields. I am sure that this book will be immensely useful to the vocational students and teachers in understanding the concepts. I wish to place my sincere thanks on record...

Words: 19574 - Pages: 79

Premium Essay

Factors Affecting the Performance of Micro and Small Enterprises in Arada and Lideta Sub-Cities, Addis Ababa

...Factors Affecting the Performance of Micro and Small Enterprises in Arada and Lideta Sub-Cities, Addis Ababa By Admasu Abera A Thesis submitted to the school of graduate studies of Addis Ababa University in partial fulfillment of the requirements for the Master of Business Administration (MBA) degree Addis Ababa University Addis Ababa, Ethiopia October 2012 Factors Affecting the Performance of Micro and Small Enterprises in Arada and Lideta Sub-Cities, Addis Ababa By Admasu Abera A Thesis submitted to the school of graduate studies of Addis Ababa University in partial fulfillment of the requirements for the Master of Business Administration (MBA) degree Addis Ababa University Addis Ababa, Ethiopia October 2012 Declaration I, the undersigned, declare that this study entitled “Factors Affecting the Performance of Micro and Small Enterprises in Arada and Lideta sub-cities, Addis Ababa” is my own work. I have undertaken the research work independently with the guidance and support of the research advisor. This study has not been submitted for any degree or diploma program in this or any other institutions and that all sources of materials used for the thesis have been duly acknowledged. Declared by Name: Admasu Abera Signature: _____________ Date: October 2012 Place: Addis Ababa, Ethiopia Advisor: Fesseha Afewerk (Ast. Prof.) Signature: ______________ Date: __________________ Addis Ababa University School of Graduate Studies This is to certify that...

Words: 22269 - Pages: 90

Premium Essay

Dac Test Document

...BRE Building Elements Foundations, basements and external works Performance, diagnosis, maintenance, repair and the avoidance of defects H W Harrison, ISO, Dip Arch, RIBA P M Trotman BRE Garston Watford WD25 9XX Prices for all available BRE publications can be obtained from: CRC Ltd 151 Rosebery Avenue London, EC1R 4GB Tel: 020 7505 6622 Fax: 020 7505 6606 email: crc@construct.emap.co.uk BR 440 ISBN 1 86081 540 5 © Copyright BRE 2002 First published 2002 BRE is committed to providing impartial and authoritative information on all aspects of the built environment for clients, designers, contractors, engineers, manufacturers, occupants, etc. We make every effort to ensure the accuracy and quality of information and guidance when it is first published. However, we can take no responsibility for the subsequent use of this information, nor for any errors or omissions it may contain. Published by Construction Research Communications Ltd by permission of Building Research Establishment Ltd Requests to copy any part of this publication should be made to: CRC Ltd Building Research Establishment Bucknalls Lane Watford, WD25 9XX BRE material is also published quarterly on CD Each CD contains BRE material published in the current year, including reports, specialist reports, and the Professional Development publications: Digests, Good Building Guides, Good Repair Guides and Information Papers. The CD collection gives you the opportunity to build a comprehensive library...

Words: 167696 - Pages: 671