basin 17 white oak
BASIN 17
WHITE OAK
BASIN DESCRIPTION The White Oak Basin drains 910 square miles of the North Carolina Coastal Plain and includes the barrier islands from Browns Inlet to Ocracoke Inlet. The basin encompasses the drainage areas of three separate rivers, the White Oak River, the Newport River and North River. The basin also includes the waters of Bogue Sound and Core Sound. About 45% of the area of the basin is classified as water by the 1992 Natural Resource Inventory. An additional 40% of the basin is forested, with much of it being in the Croatan National Forest. WATER USE Factors Affecting Water Demand The Natural Resources Inventories conducted by the Department of Agriculture estimated that the land classified as “urban/built-up” increased from 4% to 7% from 1982 to 1992. This basin has about 1% of the state’s residents and contains all or part of 13 municipalities in four counties. This basin includes portions of Onslow County, one of the state’s major metropolitan areas. As in many other parts of the state, portions of the White Oak Basin have begun to see significant growth. From 1990 to 1997 year-round population in Carteret County, grew by over 12%. Population in two counties in the basin, Jones and Onslow, declined over the same period. Total Water Use in Basin The U.S. Geological Survey’s (USGS) 1995 summary of water use estimated total water use in the basin at 9.1 million gallons per day (mgd), almost all of which came from ground water sources. USGS estimated total basin population at 72,260. Residential demand was estimated at 4.45 mgd with about 63% of this demand being supplied by public water systems. Overall, public water systems supplied 4.23 mgd from ground water for both residential and nonresidential uses. Surface water is not used as public water supply source in this basin. The remaining residential water demand was met by 1.6 mgd of self-supplied ground water. In addition, there was about 3 mgd of self-supplied water withdrawn for non-residential water uses. Local Water Supply Plans (LWSPs) All units of local government that supply or plan to supply water to the public are required to develop a LWSP. The Division of Water Resources (DWR) reviews LWSPs and maintains a database of the LWSP information. The current database reflects water use information for 1992. LWSPs were submitted by 10 public water systems having service area in this basin or using water from this basin. These systems supplied 7.7 mgd of water to 106,777 persons. DWR estimated that 36,440 of the 106,777 persons served by these 10 LWSP systems received water from sources in the White Oak Basin. Of the 7.7 mgd supplied by
these 10 LWSP systems in 1992, 2.6 mgd came from water sources in the White Oak Basin, with the remainder coming ground water from the adjoining New River sub-basin. The following table summarizes the LWSP population served with water from this basin and their water use for 1992. 1992 LWSP System Water Use from Basin (mgd) Sub-basin White Oak River
LWSP Population
Residential Use
Non-residential Use
Total Use*
36,440
1.40
0.90
2.6
*Total Use also includes unaccounted-for water and sales to other systems.
Residential water use accounted for 55% water use for these systems, while non-residential use accounted for 35%. The remaining 10% was unaccounted-for water. LWSP systems expect to supply water to 172,771 persons by the year 2020, a 62% increase over 1992 levels. Their demand for water is projected to grow 96% to 15.1 mgd by 2020. In the 1992 LWSPs, five of the seven systems using water from this basin reported that available supply was not adequate to meet estimated demand through 2002. DWR encourages systems to begin planning to manage and meet future water demands before average daily water use reaches 80% of a system’s available supply. Data for 1992 indicated that one of the 10 LWSP systems in this basin had an average demand above this threshold. By 2020, four systems project demand levels that will exceed 80% of their available supply. Self-supplied Use The USGS estimated that self-supplied users, excluding power generating facilities, accounted for 4.8 mgd of the 9.1 mgd total of water used from this basin, as shown in the table below. Irrigation use comprised 53% of the selfsupplied uses, followed by domestic (34%), livestock (10%), commercial (3%), and industrial ( 1 # of systems reporting ratio > 0.9 # of systems reporting ratio > 0.8 # of systems reporting ratio > 0.5
1992 10 0 1 1 4
2010 10 1 1 2 6
INTERBASIN TRANSFERS OF SURFACE WATER DWR has not identified any potential interbasin transfers associated with this basin, since none of the systems in the basin use surface water supplies. January 2000 Draft State Water Supply Plan DENR, Division of Water Resources
North Lenoir Water Corp Vanceboro
Aurora
Kinston Craven Co W&S
15-3 Pamlico River & Sound
Dover Cove City First Craven SD
PAMLICO COUNTY
n Wtr. Corp.
CRAVEN New Bern COUNTY
10-3 Trent River JONES COUNTY
Ocracoke S.D.
Pamlico Co.
10-1 Neuse River
Oriental
Pollocksville
Merrimon Community NW Onslow Water Assoc.
Maysville
Richlands
CARTERET COUNTY
Havelock
Jones Co.
North River Community
2-6 New River
Newport
17-1 White Oak River
Jacksonville Onslow County W&S
ONSLOW COUNTY
Swansboro
Morehead City Beaufort
Atlantic Beach
Harkers Island
Camp Lejeune
Holley Ridge
Basin 17 White Oak River
Miles 0
2
4
6
8
(unshaded basin)
LEGEND County Boundary
Basin Boundary
WHITE OAK BASIN 1992 and 2010 Population and Water Usage as reported by LWSP systems located in or using water from this basin Water systems showing "Demand as % of Supply" above 80% should be actively planning to control and meet future demand. Water Sources: g - ground water, s - surface water, p - purchased water
17
WHITE OAK BASIN
County
Water System
CARTERET
ATLANTIC BEACH BEAUFORT HARKERS ISLAND MOREHEAD CITY NEWPORT NORTH RIVER COMM JONES CO MAYSVILLE ONSLOW CO SWANSBORO
JONES ONSLOW
Water
Total Service Population Source 1992 2010 * g 20,000 35,000 g 3,874 4,150 g 2,500 3,184 g 6,046 8,700 g 2,782 3,641 g 306 335 g 6,791 6,487 g 932 877 g 62,200 87,890 p 1,346 1,938 Total 106,777 152,202
Total Water Use in mgd 1992 2010 0.57 0.49 0.14 0.98 0.28 0.02 0.52 0.10 4.50 0.14 7.73
2.00 0.60 0.19 1.41 0.38 0.02 0.50 0.11 7.25 0.20 12.66
mgd - million gallons per day
Reported Supply in mgd 1992 2010
Demand as % of Supply 1992 2010
1.308 1.3 0.505 2.008 0.8064 0.223 0.972 0.144 5.827 0.14 13
43% 37% 27% 49% 35% 7% 54% 71% 77% 100%
2.316 1.66 0.505 2.008 0.8064 0.223 0.972 0.144 10.259 0.14 19
86% 36% 38% 70% 48% 8% 52% 75% 71% 144%
WHITE OAK
BASIN DESCRIPTION The White Oak Basin drains 910 square miles of the North Carolina Coastal Plain and includes the barrier islands from Browns Inlet to Ocracoke Inlet. The basin encompasses the drainage areas of three separate rivers, the White Oak River, the Newport River and North River. The basin also includes the waters of Bogue Sound and Core Sound. About 45% of the area of the basin is classified as water by the 1992 Natural Resource Inventory. An additional 40% of the basin is forested, with much of it being in the Croatan National Forest. WATER USE Factors Affecting Water Demand The Natural Resources Inventories conducted by the Department of Agriculture estimated that the land classified as “urban/built-up” increased from 4% to 7% from 1982 to 1992. This basin has about 1% of the state’s residents and contains all or part of 13 municipalities in four counties. This basin includes portions of Onslow County, one of the state’s major metropolitan areas. As in many other parts of the state, portions of the White Oak Basin have begun to see significant growth. From 1990 to 1997 year-round population in Carteret County, grew by over 12%. Population in two counties in the basin, Jones and Onslow, declined over the same period. Total Water Use in Basin The U.S. Geological Survey’s (USGS) 1995 summary of water use estimated total water use in the basin at 9.1 million gallons per day (mgd), almost all of which came from ground water sources. USGS estimated total basin population at 72,260. Residential demand was estimated at 4.45 mgd with about 63% of this demand being supplied by public water systems. Overall, public water systems supplied 4.23 mgd from ground water for both residential and nonresidential uses. Surface water is not used as public water supply source in this basin. The remaining residential water demand was met by 1.6 mgd of self-supplied ground water. In addition, there was about 3 mgd of self-supplied water withdrawn for non-residential water uses. Local Water Supply Plans (LWSPs) All units of local government that supply or plan to supply water to the public are required to develop a LWSP. The Division of Water Resources (DWR) reviews LWSPs and maintains a database of the LWSP information. The current database reflects water use information for 1992. LWSPs were submitted by 10 public water systems having service area in this basin or using water from this basin. These systems supplied 7.7 mgd of water to 106,777 persons. DWR estimated that 36,440 of the 106,777 persons served by these 10 LWSP systems received water from sources in the White Oak Basin. Of the 7.7 mgd supplied by
these 10 LWSP systems in 1992, 2.6 mgd came from water sources in the White Oak Basin, with the remainder coming ground water from the adjoining New River sub-basin. The following table summarizes the LWSP population served with water from this basin and their water use for 1992. 1992 LWSP System Water Use from Basin (mgd) Sub-basin White Oak River
LWSP Population
Residential Use
Non-residential Use
Total Use*
36,440
1.40
0.90
2.6
*Total Use also includes unaccounted-for water and sales to other systems.
Residential water use accounted for 55% water use for these systems, while non-residential use accounted for 35%. The remaining 10% was unaccounted-for water. LWSP systems expect to supply water to 172,771 persons by the year 2020, a 62% increase over 1992 levels. Their demand for water is projected to grow 96% to 15.1 mgd by 2020. In the 1992 LWSPs, five of the seven systems using water from this basin reported that available supply was not adequate to meet estimated demand through 2002. DWR encourages systems to begin planning to manage and meet future water demands before average daily water use reaches 80% of a system’s available supply. Data for 1992 indicated that one of the 10 LWSP systems in this basin had an average demand above this threshold. By 2020, four systems project demand levels that will exceed 80% of their available supply. Self-supplied Use The USGS estimated that self-supplied users, excluding power generating facilities, accounted for 4.8 mgd of the 9.1 mgd total of water used from this basin, as shown in the table below. Irrigation use comprised 53% of the selfsupplied uses, followed by domestic (34%), livestock (10%), commercial (3%), and industrial ( 1 # of systems reporting ratio > 0.9 # of systems reporting ratio > 0.8 # of systems reporting ratio > 0.5
1992 10 0 1 1 4
2010 10 1 1 2 6
INTERBASIN TRANSFERS OF SURFACE WATER DWR has not identified any potential interbasin transfers associated with this basin, since none of the systems in the basin use surface water supplies. January 2000 Draft State Water Supply Plan DENR, Division of Water Resources
North Lenoir Water Corp Vanceboro
Aurora
Kinston Craven Co W&S
15-3 Pamlico River & Sound
Dover Cove City First Craven SD
PAMLICO COUNTY
n Wtr. Corp.
CRAVEN New Bern COUNTY
10-3 Trent River JONES COUNTY
Ocracoke S.D.
Pamlico Co.
10-1 Neuse River
Oriental
Pollocksville
Merrimon Community NW Onslow Water Assoc.
Maysville
Richlands
CARTERET COUNTY
Havelock
Jones Co.
North River Community
2-6 New River
Newport
17-1 White Oak River
Jacksonville Onslow County W&S
ONSLOW COUNTY
Swansboro
Morehead City Beaufort
Atlantic Beach
Harkers Island
Camp Lejeune
Holley Ridge
Basin 17 White Oak River
Miles 0
2
4
6
8
(unshaded basin)
LEGEND County Boundary
Basin Boundary
WHITE OAK BASIN 1992 and 2010 Population and Water Usage as reported by LWSP systems located in or using water from this basin Water systems showing "Demand as % of Supply" above 80% should be actively planning to control and meet future demand. Water Sources: g - ground water, s - surface water, p - purchased water
17
WHITE OAK BASIN
County
Water System
CARTERET
ATLANTIC BEACH BEAUFORT HARKERS ISLAND MOREHEAD CITY NEWPORT NORTH RIVER COMM JONES CO MAYSVILLE ONSLOW CO SWANSBORO
JONES ONSLOW
Water
Total Service Population Source 1992 2010 * g 20,000 35,000 g 3,874 4,150 g 2,500 3,184 g 6,046 8,700 g 2,782 3,641 g 306 335 g 6,791 6,487 g 932 877 g 62,200 87,890 p 1,346 1,938 Total 106,777 152,202
Total Water Use in mgd 1992 2010 0.57 0.49 0.14 0.98 0.28 0.02 0.52 0.10 4.50 0.14 7.73
2.00 0.60 0.19 1.41 0.38 0.02 0.50 0.11 7.25 0.20 12.66
mgd - million gallons per day
Reported Supply in mgd 1992 2010
Demand as % of Supply 1992 2010
1.308 1.3 0.505 2.008 0.8064 0.223 0.972 0.144 5.827 0.14 13
43% 37% 27% 49% 35% 7% 54% 71% 77% 100%
2.316 1.66 0.505 2.008 0.8064 0.223 0.972 0.144 10.259 0.14 19
86% 36% 38% 70% 48% 8% 52% 75% 71% 144%
