Need for a Hydrologic Model
A computer model is a needed tool for surface water management purposes. For long term planning, the State uses hydrologic model in making regulatory decisions by evaluating potential impacts of proposed projects with significant water withdrawals within the basin and interbasin transfer permit application, planning for increased water use due to continuous growth, and in real time in managing the basin having challenges of resources, and operational and regulatory constraints during a drought condition.
OASIS, a patented, mass balance, water resources simulation/optimization model was developed for the Cape Fear and Neuse river basins. This combined two-basin model uses the finest practical geographic resolution and time step.
2014 Cape Fear and Neuse Combined Model
The original Cape Fear and Neuse River Basin Hydrologic models were developed earlier in 2004 and 2008 for the use of Cape Fear and Neuse river basins. The next phase was for updating and consolidating the two existing river basin models into one, a joint model. The project was started along with Jordan Lake Allocation Round 4. The Triangle area water demand is supplied from the reservoirs and rivers in both Neuse and Cape Fear River basins. These special demand and supply conditions and interbasin transfers of water have initiated the project to combine the two models for evaluation of this unique regional water supply sources for future demand and impact of water transfer and allocation of Jordan Lake water.
The current version of the model includes hydrologic period from Jan 1929 to September 2011 with water withdrawal data for year 2014 as base case scenario and 50-year planning projection period scenarios from 2020 to 2060 for every 10-year interval.
Combined Model Development Documents and Reports:
- April 2011 Version Contract A
- July 2013 Version Contract B
- Modeling the Cape Fear & Neuse River Basin Operations with OASIS
- Appendix A - Model Static Input Data and Run Code
- Appendix B1 - Cape Fear Finalized Inflow Data Development
- Appendix B2 - Neuse Finalized Inflow Data Development
- Appendix C - Provisional Inflow Data Development
- Appendix D - Model Weighting Description
Archived Model Reports
2004 Cape Fear OASIS Model:
- October 2008 Cape Fear River Basin Surface Water Assessment
- October 2008 Cape Fear River Basin Model Instream Flow Analysis
- NC Water Supply Plan 1997 - Cape Fear River Basin Summary
- NCDEQ Cape Fear Water Supply Plans 2002
2008 Neuse OASIS Model
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