SUMMER 2003GEOHAZARDS COURSE AT UWI, MONA - page 005

Prepared and compiled by Rafi Ahmad, Unit for Disaster Studies,
Department of Geography and Geology,
University of the West Indies, Mona, Kingston 7, Jamaica

1B. LAB WORK FOR MODULE NO. 1

1B. 1 Lab #1. Introduction to topographic maps and their use in the study of geohazards.
AIMS:
a. Use Jamaica as an example to show how conventional topographic maps may be obtained.
b. Use 50k and 12.5k sheets to introduce map projections, true north, magnetic north, compass corrections, grid referencing, scales, areas covered at different scales, relief features, geographical features. Persons intending to use GIS are often not fully conversant with some of these aspects.
c. Interpretation of landforms and lithology in a section of a 50k sheet, preparing a legend, and drawing of a topographic profile; writing a brief report on the geomorphology including criteria used in landform recognition and highlighting features of interest in the study of geohazards. The sheet selected will be of interest from the point of view of geohazards and for which other relevant data and aerial photos should be available, e.g. Kingston and St.Andrew.)

1B. 2 Lab #2. Introduction to aerial photographs and their use in the study of geohazards
AIMS:
a. Use Jamaica as an example to show how photos may be selected from an index and obtained.
b. Basics of geologic/structural/geomorphic photo-interpretation, photo-mosaics, photo-scale, distortions, limitations. Introduce a simple technique to transfer photo-data to topographic map- sketchmaster.
c. Preparation of a photo-geologic map from a stereopair for the area interpreted in Lab #1. The map should show major lithology, structure, and landforms. It should be accompanied by a report that includes criteria used in the recognition of features.

 1B. 3 Labs. #3 and 4. Field exercise to check the interpretation and accuracy of maps prepared in Labs. 1 and 2. (Two sessions of 3 hours each in an area close to the MonaCampus).
AIM:
This scope of this exercise is limited field checks on the maps produced based on the interpretation of topographic map and aerial photos. Identification and description of lithology, structures, and soils. Comparison of data collected with published maps. Rocks and soils will be described from a geotechnical point of view.

NOTE: Data collected in Labs. 1 to 4 should be retained for use in preparing a geohazards profile of the mapped area.

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