Introduction to Geographical Information Systems Short Course coming up!
GISSA quarterly meeting
On the 20th of September five Students from Stellenbosch University presented their research and findings to the GIS community at the Western Cape GISSA quarterly meeting in Durbanville. Michael Johnson (MSc) – Extraction of coastal ocean wave characteristic parameters using multispectral remote sensing and computer vision technologies. Gerrit Low (PhD) – Object-based terrain [...]
Introduction to GEOBIA, presented at CSIR, Pretoria
The CGA presented its Introduction to GEOBIA short course to the Environment (NRE) Ecosystems Earth Observation Research Group at the CSIR campus in Pretoria from 14-17 August. The course was presented as part of the Trimble Innovation Programme (TIP) of which the CGA is an active member. The GEOBIA training made use of [...]
Satellite image time-series of main dams supplying Cape Town with water – Wemmershoek Dam
The final dam considered in our satellite time-series is the Wemmershoek Dam. Located between Franschhoek and Paarl in the Wemmershoek mountains, this earth-fill dam is one of the smaller dams supplying water to Cape Town, with a capacity of 58644 Ml. Currently at 40% capacity (in comparison to 69% this time last year), [...]
Satellite image time-series of main dams supplying Cape Town with water – Theewaterskloof Dam
The largest dam in the Western Cape, namely Theewaterskloof Dam, is the next dam being considered in our satellite time-series. Established in 1978, the earth-fill dam was constructed in the Riviersonderend River near Villiersdorp, with the mountains of the Hottentots-Holland Nature Reserve serving as the primary catchment. With a capacity of over 480 [...]
Jessica Eichhoff – Cartographer & GIS Analyst
Biography Jessica has always had an interest in geography and a deep-seated passion for the environment, regularly volunteering for both local and international environmental organisations, and spending as much of her free time in nature and the outdoors. Her career path has taken various turns, starting with Hotel Management and thereafter [...]
Satellite image time-series of main dams supplying Cape Town with water – Berg River Dam
The Berg River Dam, the most recently established large dam supplying Cape Town with water. The 68 m tall, concrete-face rockfill dam with a capacity of 130 million cubic metres makes up 14% of the water storage capacity in the Greater Cape Town Region. Planning of the dam began in 1989, with extensive social and environmental impact studies undertaken before ground [...]
Satellite image time-series of main dams supplying Cape Town with water – Voëlvlei Dam
Second only to Theewaterskloof Dam in capacity, Voëlvlei is the third dam being considered in our satellite image time-series. Commissioned in 1952, the dam was constructed by impounding the natural Voëlvlei lake near Gouda, creating the first large water supply scheme in the Berg River catchment. Due to the relatively small size of the catchment, additional water is abstracted to the dam from [...]
Satellite image time-series of main dams supplying Cape Town with water – Steenbras Dams
In support of the efforts to alleviate the water shortage in the Cape Town region, the CGA is releasing a satellite image time-series of the main dams that supply the City of Cape Town and surrounds with potable water. The images show each dam’s highest water level in 2016, progressing through the summer [...]
Recent media releases
The CGA would like to share with you the recent media releases of the wide-scale modelling of water use and water availability with earth observation/satellite imagery project. The CGA in collaboration with Dr Caren Jarmain (independent consultant), GeoTerraImage and eLEAF of the Netherlands aims to update the existing estimations of the extent of [...]