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The dashboard relate to Climate Change indicators including changes in temperature, wet spells, dry spells, irrigation demand, potential evaporation, mean annual precipitation and streamflow. The available climate change data used is at quinary scale (i.e. sub-division of the quaternary). However, the maps are delineable into quaternary and water management area levels.
The purpose of the dashboard is to provide show comparison between the current or historic (i.e. 1975-2006) and the immediate future (i.e. 2016-2045) climate scenarios. The dashboard enables the user to depict trends in terms of indicators previously mentioned on graphs and maps thus providing an indication of climatic changes within a particular area of interest.
Dr Motlole Christopher Moseki,Specialist Scientist, Directorate: Integrated Water Resource Planning,Sedibeng 712
Telephone: 012 336 8164
The dashboard aims to answer the following questions:
Data for the 9 indicators as listed below are provided for each quinary catchments in SA to represent climate change projection indicator values.
In excel / csv sheet:
Mean Annual Precipitation
Historical = 1950 - 1999. Units = mm per annum
Percentage change from 1990s to 2030s, is derived from present (1975 - 2006) / immediate future period (2016 - 2045). Unit = %
Project: This is the historical value x the percentage change to give a future value (2030s)
Mean Annual Streamflow
Historical = 1950 - 1999. Units = mm per annum
Percentage change from 1990s to 2030s: Derived from present (1975 - 2006) / immediate future period (2016 - 2045). Unit = %
Project: This is the historical value x the percentage change to give a future value (2030s)
Median Annual Net irrigation requirement
Historical = 1950 - 1999. Units = mm per annum
Percentage change from 1990s to 2030s: Derived from present (1975 - 2006) / immediate future period (2016 - 2045). Unit = %
Project: This is the historical value x the percentage change to give a future value (2030s)
Difference between mean and median is minimal.
Median Annual Evaporation: Units = mm per annum.
Present = 1975 - 2006.
Percentage change from 1990s to 2030s: Derived from present (1975 - 2006) / immediate future period (2016 - 2045). Unit = %
Project: This is the historical value x the percentage change to give a future value (2030s)
At this point only historical recharge values are available.
Historical period: 1950 - 1999. Unit = mm per annum
Number of occurrences during 3 consecutive months
There are no historical values for this particular indicator.
Present period = 1975 - 2006. Units = Average number of occurrences
Percentage change from 1990s to 2030s is derived from present (1975 - 2006) / immediate future period (2016 - 2045). Unit = %
Project: This is the present value x the percentage change to give a future value (2030s)
3 day 10 year return period
There are no CMIP5 values for this particular indicator yet. CMIP3 values were used.
Historical period = 1950 - 1999. Units = cubic metres (m^3)
Percentage change from 1980s to 2050s: Derived from present (1971 - 1990) / intermediate future period (2045 - 2065). Unit = %
The data from the ACRU model is processed and provided once-off in CSV format by the Mr Nicholas Davis from the Isikhungusethu Environmental Services and stored on the NIWIS folder on the N-drive. The static maps are provided in pdf format.
For each quaternary catchment the values of the second quinary is used to represent the aggregation up to quaternary level
None
Yes, please refer to the below:
The real time data is not verified. One has to be cautious when using the data.
Copyright: The copyright of the data/information remains with the Department of Water and Sanitation. This approval to use the data/information cannot be construed as a transfer of copyright.
Usage: All data is supplied free of charge and may not be sold to third parties. The use of information data is restricted to use for academic, research or personal purposes.
Quality: All data is supplied with no expressed or implied warranty as to its suitability for purpose, accuracy or completeness.
Status: Meanwhile data is continuously updated; the data set(s) supplied are already historical on the day of supply.
Acknowledgement: Whenever used in publications or the electronic media, the Department Water and Sanitation is to be mentioned as the proprietor of the relevant copyright