iGeo 2010, Писмен тест — Задача 6. Section II - Flood · 1
Written Response Test — Question and Answer Booklet — 8th International Geography Olympiad — Taipei, Taiwan — July 29 - August 4 2010 · 29 юли 2010 г. · 3 т.
Внимание: Бележка към темата
The questions refer to a separate Sources booklet (the Section I article, the Section II discharge table, the Section III population pyramids and tables, the Section IV and V photos and satellite image, the Section VI photos). That booklet is not in the archive, so several questions cannot be answered from this page alone.
Instructions for the students
This test consists of six sections.
The maximum total mark is 80.
The mark for each question is given at the start of the question, eg. 3m = 3 marks.
| I | Millennium Development Goals (MDGs) | 12 marks |
| II | Flood | 13 marks |
| III | Population geography | 14 marks |
| IV | Landforms | 13 marks |
| V | Agriculture and environment | 13 marks |
| VI | Natural hazards | 15 marks |
- Give only the required number of answers (reasons, examples, et cetera).
For instance, if the question asks for two reasons and you give more than two, only the first two reasons will be marked.
Answer all questions in the spaces provided in the Question and Answer Booklet.
Check the backs of the pages as questions sometimes continue on the back of a page.
Fill in your name and team on the front page AND in the box on top of each page of the Question and Answer Booklet.
The Sources booklet contains the maps and figures referred to in the questions.
Time: 180 minutes for non-native English speakers
150 minutes for native English speakers
Non-native English speakers are allowed to use bilingual dictionaries during the test.
You may use a calculator during the test.
Good luck!
Условие
Floods are the most devastating of all natural processes, and they affect more people than all other natural hazards combined. Using records of river discharge data, it is possible for hydrologists to statistically predict the recurrence of floods of a particular river. The prediction is done by constructing a flood-frequency curve from the annual peak discharges recorded at a gauging station. Firstly, hydrologists rank the annual peak discharges according to their size, assigning a rank (R) of 1 to the highest discharge, a rank of 2 to the second largest discharge, and so on. Then, they calculate the recurrence interval (T) for each peak discharge event, using the formula:
Where T = recurrence interval (in years)
N = the number of years for which discharge data are available
R = rank of the discharge event
Look at the table in Source 1, and calculate the recurrence interval (T) of the peak discharge in years 1925, 1938 and 1944.
Отговори
1925: T = 1.19; 1938: T = 3.10; 1944: T = 15.50
Values as printed in the marking scheme; the Source 1 discharge table is not in the archive.
Решение
3 marks
see Source 1 (1925 = 1.19, 1938 = 3.10, 1944 = 15.50)
Оригинал в Архива: 2010iGeo_WRT_question.pdf · официални решения: 2010iGeo_WRT_MarkingScheme.pdf