Wake County Comprehensive Groundwater Investigation

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Wake County Comprehensive Groundwater
Investigation Groundwater Study Advisory
Committee Meeting July 10, 2002
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Organizational Chart
Technical Advisory Committee
Groundwater Study Advisory Committee
Project Team A
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Groundwater Study Advisory Committee Objectives

• Review and Comment of Project Deliverables
• Define and Finalize Objectives
• Provide Technical and Reality-Based Insight

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Project Overview

• Task 1 Stakeholder Involvement (Meetings)
• Task 2 Delineate Hydrogeologic Units
• Task 3 Data Collection
• Task 4 Water Quantity Assessment
• Task 5 Water Quality Assessment
• Task 6 Assessment of Future Conditions
• Task 7 Finalize Objectives
• Task 8 Groundwater Study Report

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Project Schedule
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Project Objectives

• Estimate current total groundwater consumption.
• Estimate future groundwater consumption for
  various planning horizons.
• Evaluate future conditions based on estimated
  future groundwater consumption with current
  programs and policies in place.

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Project Objectives (continued)

• Determine groundwater recharge rates countywide.
• Establish a relationship between groundwater and
  stream baseflow.
• Develop and provide a useful database of
  information and GIS coverages to assist in future
  groundwater resource planning.

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Project Objectives (continued)

• Develop a database of well yields and evaluate
  well yield patterns.
• Assess groundwater quality county-wide, and
  within each hydrogeologic unit.
• Identify areas where groundwater quality may
  affect groundwater use.

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Project Objectives (continued)

• Identify where most of the wells are located
  within the County.
• Provide information to support zoning decisions
  based on groundwater availability.
• Provide a further understanding of localized
  areas where water quality is degraded due to
  elevated arsenic, radon, pesticides and iron.

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Project Objectives (continued)

• Prepare and provide public information regarding
  septic tank and private well operation and
  maintenance.

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Project eRoom Main Page
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Project eRoom Tech Memos Reports
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Project eRoom Tech Memos Reports
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Project eRoom Contact List
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Project Web Site (www.tec-web.com/wakecgi)
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Task 2 Delineate Hydrogeologic Units

• Objective To Identify the water bearing units
  and how they correlate with the watershed basins.
• Purpose Dividing the County into watersheds and
  hydrogeologic units will allow for focused water
  quantity (water balance) and water quality
  assessments.

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StreamGage Locations
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14 MajorDrainage Basins(11-Digit Hydrologic
Units)
Upper Falls Lake
Lower Falls Lake
Beaver Dam
Upper Neuse
Crabtree Creek
Little River
Jordan Lake
Walnut Creek
Lower Neuse
Swift Creek
Middle Creek
Harris Lake
Kenneth Creek
Black Creek
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7 Major Hydrogeologic Units(Daniel and Payne,
1990)
Upper Falls Lake
Lower Falls Lake
Coastal Plain Basement
Gneiss, Felsic
Igneous, Massive Intrusive
Metaigneous, Felsic
Metaigneous, Mafic
Metavolcanic, Felsic
Beaver Dam
Triassic Sedimentary Rocks
Upper Neuse
Hydrologic Basin Boundary
Crabtree Creek
Little River
Jordan Lake
Walnut Creek
Lower Neuse
Swift Creek
Middle Creek
Harris Lake
Kenneth Creek
Black Creek
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Task 3 Data Collection

• Objectives 1) Identify and collect available
  supporting information for performing the water
  quantity, quality and sustainability
  assessments.
• 2) Determine major data gaps.
• Purpose Populate the integrated project
  database (GIS and electronic data).

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Task 3 Data Collection
Major Sources

• Water Quantity
• NCDENR PWS (Community Water Systems)
• USGS, NCGS (Online Streamflow Data 1995 Water
  Usage Report)
• Wake County (GIS, Env. Services and Planning
  Departments)
• Water Quality
• NCDENR Groundwater Section
• NCDENR PWS (CWSs Source Water Assessment
  Program)
• USGS, NCGS
• Wake County (Dept. of Env. Services)

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Next Meeting Date
?
Complete Task 3 - Data Collection
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Next Meeting Date
Begin Task 4 Water Quantity Assessment
?