Overview The main objectives of this consultancy were to undertake scenario analyses, economic, water requirement projection and ecological support studies Read more
Support to Phase 3 of the ORASECOM Basin-wide Integrated Water Resources Management (IWRM) – Plan: Overview
Water Resources Quality Joint Basin Surveys (JBSs)
The second 5-yearly comprehensive Joint Basin Survey (JBS2) of the quality of the water resources of the Orange-Senqu River Basin was undertaken Read more
2014 Integrated Water Resources Management Plan (IWRMP) – Summary and Documents
Purpose: This article will provide an overview of the 2014 IWRMP and provide links to the actual documents Related WIS Read more
Irrigation Water Demand Management (WP6)
Objectives The overall objective of the work package was to attain an overall understanding of how better management practices could reduce Read more
Development of Integrated Orange-Senqu River Basin Model (WP1)
- to enlarge and improve the existing models to cover the total Orange River Basin and
- to capacitate representatives of each of the basin states to set up and use the models.
- Assessment of strengths and weaknesses of existing models
- Extension and expansion of the existing models
- Assessment of system yields
- Review the water balance for the Orange/Senqu Basin
- Developing a system schematic for the full system
- Assist representatives from each of the four Basin States to set up and use the models
The existing “Yield” (WRYM) model was updated to include additional components in various
parts of the Orange/Senqu basin. The updated models also make use of the updated and
extended hydrology. Only the Fish River in Namibia has not been completed and will be
included at a later stage. The modelling work was complicated to some extent by the fact that DWA South Africa is currently upgrading the models and the Project Team had to work with the available versions. The current model developments by DWA South Africa is likely to continue for most of 2011 and will probably be followed my more upgrading phases. Any upgrades to the models will be made available to the 4 basin states as and when available. This also complicated the capacity building process in some respects and it is clear that follow up courses will be required as new software versions become available.
A number of activity related conclusions and recommendations are provided in the various
working papers and reports. In addition to these, a number of important general recommendations can be made.
- Regular capacity building sessions at both the expert and decision-maker level should continue in Phase 3 and beyond. This will allow each basin state to keep abreast of new software developments, promote transparency and ensure that decision-makers from each basin state can contribute to basin-wide water resources management decisions on an equal footing
- The ORASECOM Secretariat should serve as custodian of the updated model setups, ensuring that updates carried out at the country level are properly consolidated.
- The ORASECOM Secretariat should play a leading role in facilitating the annual technical review process.
Ceago, C. et al. 2011. Setting up and Testing of the Final Extended and Expanded Models; Changes in Catchment Yields and Review of Water Balance: Support to Phase 2 of the ORASECOM Basin-wide Integrated Water Resources Management Plan
McKenzie, R. et al. 2011. Capacity building and setting up the models in each country; Process of continuous review: Support to Phase 2 of the ORASECOM Basin-wide Integrated Water Resources Management Plan