MARACAS2ENV-3A1Y / ENVF3A1Y (2009-10)   Landslide Hazards

 

CONTENTS

  • Power Point Presentations of lectures

·         Lecture  1    Introduction  [1.7 Mbytes]

·         Lecture  2    Why Landslides occur [1.0 Mbytes]

·         Lecture  3    The Hong Kong Slope Catalogue and Landslip Preventative Measures [7.3 Mbytes]

·         Lecture 4     Development of Hong Kong Landslide Warning System [1.4 Mbytes]

 

 

 

 

           Landslide Hazards – more information on three of the topics for Semester 1 Assignments

 

o    A Review of Papers on Rainfall Induced Landslides

o    An assessment of the Slope Stability Information System of Hong Kong This report involves a review and critique of the WEB based system

o    Lake SAREZ

 

o    (1) Review the recent papers discussing the impacts of rainfall on slopes stability.

There are several examples of such papers, already accessible from the additional reading page. You should critically appraise the developments, particularly drawing on points of conflict between the papers, and/or similarities in approach. Your discussion should also include how these articles appraise slope failure in similar or different ways to the classical approaches to slope stability. Your discussion should not be more than 2000 words.

Credit will be given if you also explore other papers on the topic

 

o    (2) Write a Review of the Hong Kong Slope Information System now available on the WEB at         

                                    http://hkss.cedd.gov.hk/hkss/

After Entry to the system - select the Slope Information System and follow links (some pages have an "Acceptance Button" at the bottom of the page). You will also find various guided tours on how to use the system.

The aim of this option is for you to write a review in 2000 words of the usefulness, ease of use etc of the system. There are several methods you can explore the system and the key methods are all provided with a TOUR to get you started. Reference inf the pages is made to the Slope Catalogue number

The Slope Catalogue number is of the form 11 SW-A/xxYYYY where 11 SW-A represents the the map 11 (there are 16 in all), SW is the SW section of map 11, and A is a subdivision of SW into four sections. A copy of each of the basic Maps 1 - 16 is available in the Map Collection.

xx is one of the following

§  C for cut slopes

§  F for Fill slopes

§  R for retaining Walls

§  FR for Fill Slope with Retaining Wall

§  CR for Cut slope with Retaining Wall

the sequence yyyy represents a number from 1 - 9999

Things for you to explore

§  use the system by reference to the Slope Catalogue Number. There are 6 reference numbers in particular you might try:- 11 SW-A/R 188 (Peel Street), 11 SW-A/R 91 (Wind Ling Street - Bridges Street market), 11 SW-A/R 65 Kui In Fong, 11 SW-A/r 64, 11 SW-A R 1117 and 11 SW-A C 398 (all in Po Hing Fong). 11 SW-A/CR 175 (Po Shan Road).

All but the last of these were retaining walls/slopes which N.K. Tovey designed special prentative measures for in 1983/1984. There should be a record to this work being done in 1985 in all the records. In the case of Peel Street, the trees on the wall (see photo), were the casue of the instability, and N.K.Tovey had considerable difficulty in persuading the power that be that they should be retained. You will see the boxes designed by him so that the trees could be retained.

11 SW-A/CR 175 was scene of the major Landslide Disaster in 1972 and this information was available in the report in 2003 (see the powerpoint presentation given in lectures, slides 10 -19) Some questions

§  Is reference to the preventative measures shown for all the above slopes?

§  Is reference made to the Landslide which occurred to the right hand end of R1117 included in the report (originally R1117 was 2 walls R53 and R56 )

§  What happens if you enter the old slope number?

§  use the Street Name - e.g. PO Hing Fong Above - say number 50-56

§  use the Building Name - e.g. Bridges Street Market, Baguio Villas, Scenic Villas etc

§  try using the system by selecting a building name (e.g. Bridges Street market, Po Shan Mansions etc)- is the map provided by this means more informative

§  try to identify the information by Street Name (e.g. Po Hing Fong (50 - 56), or Po Shan Road (16 - 18).

§  The Hong Kong Co-ordinate System is bounded by Easting 800000 Northing 800000 at the extreme South West of the Territory and Easting 860000 Northing 850000 at the extreme North East. However, a considerable part of the area is sea, and you will not get information if you try to position over the sea.

§  the Graphical Interface allows you to select a particular part of Hong Kong

The Report

Once you have experimented with the facilities, you should be in a position to write your assessment on aspect such as

§  how useful the system is

§  how easy is it to use

§  does it appear to give the information required

§  what improvements would you suggest to the system

§  etc.

Lake Sarez

 


This page is maintained by Keith Tovey (e-mail: k.tovey@uea.ac.uk).