GeoTerraImage has released a web-based application for monthly monitoring of South Africa’s surface water resources. Water is a critical and scarce resource in southern Africa, and is likely to become even more so as the regional impacts of global climate change become more evident. Being able to accurately and repeatedly monitor available water resources across the entire landscape is a key information requirement for successful water resource management.
Cloud-based satellite image data archives, combined with big data processing capabilities are used to generate spatially detailed information on the extent of all surface water features, from small farm dams to large impoundments, across the South African landscape, on a monthly basis.
Each month, information will be available that describes the current months total surface water, area as well as the previous months total. The total surface water area is generated from multiple Sentinel 2 satellite image observations (at 20m resolution), within each month. Should any area be obscured by cloud in all satellite over-passes then this is flagged and illustrated in the map. Water are statistics for catchments with very high cloud cover percentages should be used with caution.
By clicking on a quaternary catchment, the website will display the statistics of the current and previous month's total water surface area in that selected catchment, and indicate the trend.
The website will remain OPEN-ACCESS for all to use until 31 March 2018 after which a user subscription may be introduced.
Please contact us if you are interested in the digital data access, and/or sample data.