Latest South African Journal of Geomatics

South African Journal of Geomatics has just published its latest issue. Here is a list of the articles:

The Use of Landsat and Aerial Photography for the Assessment of Coastal
Erosion and Erosion Susceptibility in False Bay, South Africa (65 - 79)
- Kerry Callaghan, Jeanine Engelbrecht, Jaco Kemp

Geophysical monitoring of coastal erosion and cliff retreat of Monwabisi
Beach, False Bay, South Africa (80 - 95)
- Michael Robert MacHutchon

The influence of wave action on coastal erosion along Monwabisi Beach, Cape
Town (96 - 109)
- Jean-Pierre Fourie, Isabelle Ansorge, Bjorn Backeberg, Hayley
Cawthra, Michael MacHutchon, Wilhelm van Zyl

Projected inundations for tsunami waves in low-lying areas on the South
African coast (110 - 122)
- Hayley C. Cawthra, F. Wilhelm van Zyl

An assessment of coastal vulnerability for the South African coast (123 -
137)
 - Chiedza Musekiwa, Hayley C Cawthra, Maxime Unterner, Wilhem van Zyl

Change detection of bare areas in the Xolobeni region, South Africa using
Landsat NDVI. (138 - 148)
- Rebekah Gereldene Singh, Jeanine Engelbrecht, Jaco Kemp

Remote sensing study of soil hazards for Odendaalsrus in the Free State
Province (149 - 160)
- Patrick Cole, Janine Cole, Souleymane Diop, Marinda Havenga

Mineralogy and heavy metal content of secondary mineral salts: A case study
from the Witwatersrand Gold Basin, South Africa. (161 - 173)
- Mafuza Maya, Malcom Sutton, Hlanganani Tutu, Isabel Weiersbye

Remote sensing and geochemistry techniques for the assessment of coal mining
pollution, Witbank (Emalahleni), Mpumalanga. (174 - 188)
- Mafuza Maya, Ponani Mthembi, Chiedza Musekiwa, Melissa Crowley

Visit their web site to review articles and items of interest - South African Journal of Geomatics

Two-thirds of South Africa's dams contain harmful bacteria

A 10-year study has revealed two-thirds of South Africa’s dams contain bacteria that are harmful to humans and animals.

The study has made use of the latest satellite imagery to view 50 of the country’s largest dams.  University of Cape Town earth observation scientist Dr Mark Matthews, who conducted the study as part of his PhD study, which was funded by the CSIR under the supervision of CSIR principal scientist Dr Stewart Bernard, the principal researcher in the project,  says the images reveal an alarming spread of the harmful cyanobacteria in many of the dams - “Half to two-thirds of our reservoirs have a cyanobacteria problem. What we also found is that the timing and frequency of the events is quite variable and will change from time to time.”

 

Hartbeespoort Dam in the North West was found to contain the worse spread of cyanobacteria in the country.

In the Western Cape, the dam to fare the worst is the Theewaterskloof Dam."

The full article can be found in the Engineering News