Study Outline

 

CAPE FEAR RIVER BASIN STUDY

PRELIMINARY OUTLINE

I. INTRODUCTON

  1. Project History from Inception Through Selection of Study Team
  2. Introduction to Study Team & Their Individual Responsibilities

II. GENERAL SITE DATA  

  1. Population
  2. Land Use (Taken From GIS Coverages & Land Use Plans)
    1. Historical
    2. Existing
    3. Future
  3. Climate
    1. Precipitation
    2. Evaporation
  4. Hydrology and Drainage Features
    1. Topography
    2. General (Discussion)
    3. Digital Elevation Models (DEM’s)
    4. SCS Soil Mapping
    5. Major Streams and Tributaries Within Cape Fear River Basin
    6. USGS Gage Records
    7. Historical Floods
    8. Historical Droughts
  5. Reservoirs
    1. Lake Jordan
    2. Lake Randleman
    3. Other Impoundments

III. SURFACE WATER WITHDRAWALS & DISCHARGES WITHIN CAPE FEAR RIVER BASIN

  1. Data Sources
    1. Withdrawals
    2. Discharges
  2. Surface Water Withdrawals
    1. Public Supply Use
      1. IBT’s
      2. Breakdown by consumptive use categories
      3. System losses
      4. Returns to water body
    2. Domestic Uses
    3. Commercial Uses
    4. Industrial Uses
    5. Mining Uses
    6. Livestock Uses
    7. Irrigation Uses
    8. Thermoelectric Uses
  3. Surface Water Discharges
    1. NPDES Discharges
    2. Other Point Source Discharges
    3. Non-point Source Discharges (Agricultural runoff, etc.)
  4. Conclusions and Need for Model to Account for all Water Resources within the Cape Fear River Basin

IV. MODEL DEVELOPMENT

  1. MIKE BASIN Overview
  2. MIKE BASIN Code Modifications Required
    1. Low Flow Targets
    2. Output Compatible with EPA Water Quality Models
    3. Stream Flow Profiles (including 7Q10 conditions)
    4. Drought Management and Forecasting
    5. Enhanced GUI
    6. Agricultural Consumptive Use
    7. Flood Routing/Flood Release
    8. Incorporate Specific Drought Management Policies
    9. Develop More Detailed Model Documentation
      1. Manuals
      2. On-line Help System
      3. Wizard/Naviagator
  3. Model Setup and Required Input
    1. Node Locations
      1. USGS Gages
      2. Withdrawal Sites
      3. Discharge Sites
      4. Other Sites of Interest
  4. Computations Required for Each Node
    1. Drainage Areas (GIS Coverages & DEM’s)
    2. Naturalized Flow
  5. River Network (Branches)
    1. Routing Coefficients
    2. Other Coefficients (?)
  6. Reservoirs
    1. Geometric Relationships
    2. Precipitation & Evaporation
    3. Operational Polices & User Allocation Accounts

V. MODEL CALIBRATION/VERIFICATION

  1. Selection of Calibration/Verification Period
  2. Model Run & Discussion of Input Parameter Manipulation to Match Measurements

VI. FUTURE CONDITIONS

  1. Extrapolation of USGS Gage Records
    1. Estimate Urbanization Trends
      1. Compute SCS Curve Number for Each Year Using Yearly Runoff Volumes, Drainage Areas, and Precipitation
      2. Analyze Trend of SCS CN’s
      3. Cross-reference with Land Use Plans to Ensure Reasonableness
    2. With New CN’s Recreate a Wet, Dry, and Normal Year of River Q with Wettest, Driest, and Normal Precipitation Year (Create for as Many Years As Desired or Until Full Reasonable Build-out Reached)
  2. Adjustment of Other Model Input Parameters Related to Discharge Change
  3. Extrapolation of Water Withdrawals and Point & Non-point Discharges based Historical Trends
  4. Model Run
  5. Results and Conclusions

VII. DROUGHT CONDITIONS

  1. Computation of 7Q10 Statistics (Gaged & Extrapolated to Ungaged by Drainage Area Ratios)
  2. 7Q10 Run with Current Allocations
  3. 7Q10 Run with Current Approved Future Allocations
  4. 7Q10 Run with Other Allocations Requested by NCDWR
  5. Results and Conclusions

VIII. CONCLUSIONS AND FINAL RECOMMENDATIONS

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In Association With Our Funding Partners .. 

Cape Fear River Assembly

The Towns of Apex, Cary and Morrisville

Wake County.

For problems or questions regarding this web contact [capefear@hydrology.ehnr.state.nc.us].
Last updated: April 28, 1999.