Effects of Urbanization on Stream Ecosystems (EUSE) Study Basin Ecology
How do the hydrologic, geomorphic, chemical, and biological characteristics of stream ecosystems respond to land-use changes associated with urbanization, and how do these responses vary across environmental settings?
SPECIFIC OBJECTIVES:
-
Determine the hydrological, geomorphic, chemical, habitat, and biological characteristics that respond to land-use changes associated with urbanization in specific environmental settings.
-
Determine the most important landscape features influencing hydrological, chemical, geomorphic, habitat, and ecological responses to urbanization.
-
Compare the hydrological, geomorphic, chemical, habitat, and biological responses to urbanization among a range of environmental settings.
-
Determine the physical and chemical factors associated with biological responses and compare these physical and chemical factors across environmental settings.
-
Develop empirical models to relate physical, chemical, and biological responses to landscape features associated with urbanization.
An investigation of the urban crescent from Raleigh to Winston-Salem N.C. is underway to study the relation between varying levels of urban intensity in drainage basins and in-stream water quality, measured by physical, chemical, and biological factors. Water quality has been sampled in 30 drainage basins that have similar natural (e.g., climate, elevation, soils) characteristics and represent a gradient of urban intensity.
The urban intensity of each basin is measured using an index that integrates information about the multiple dimensions of human influence on the urban landscape at the drainage basin scale. The index includes information about land cover, infrastructure, population, and socioeconomic characteristics. Some of the variables used in the index may also be important factors for explaining variations in water quality.
The gradient design used in the NAWQA Program to investigate the effects of urbanization is premised on two perspectives about water-quality.
First, instream water-quality is a composite of physical, chemical, and biological characteristics that are influenced by natural factors and by the human activities. Biological communities reflect the integration of these influences.
Second, landscape and stream characteristics reflect both the physical context of a basin and human influences. The character of the urban residential landscape, for example, can vary dramatically as socioeconomic factors - income, age of housing stock, levels of education - change among neighborhoods.
Investigation of the effects of urbanization on water quality must control for the effects of natural factors, while allowing the degree of urbanization to vary between study basins. By narrowing the focus the study to a single ecoregion, the North Carolina Piedmont, the investigation used a regional framework that enforces a measure of control over variability in natural factors that influence water-quality.
The data collected at streams in the study included nutrients, pesticides, and ions in stream water, geomorphic and habitat characteristics, hydrologic stage, water temperature, pH, dissolved oxygen, specific conductance, benthic algae and invertebrate communities, and fish communities.
Watershed Site Information
| Map No. | Water Quality Data | Site No. | Site Name | Location | Latitude | Longitude |
|---|---|---|---|---|---|---|
| 1 | statistics | 0211583580 | Bowen Branch near mouth at Winston-Salem, NC | Bowen Branch Tributary near Bowen Road | 36°07'05" | 80°12'46" |
| 2 | statistics | 02099480 | Richland Creek near Archdale, NC | Richland Creek at Kersy Valley Road SR 1154 | 35°56'28" | 79°55'56" |
| 3 | statistics | 02099238 | Bull Run at NC 29/70 near Jamestown, NC | Bull Run on High Point Road or Vickery Chapel Road | 35°59'53" | 79°55'36" |
| 4 | statistics | 0209517912 | North Buffalo Creek at Greensboro, NC | Unnamed Tributary at Green Valley Parkway | 36°05'21" | 79°49'44" |
| 5 | statistics | 02100294 | Hasketts Creek below SR 2149 near Central Falls, NC | Hasketts Creek at SR 2128 Wow Road | 35°46'04" | 79°46'44" |
| 6 | statistics | 02100634 | Vestal Creek near Asheboro, NC | Vestal Creek at Pine Hill Road SR 2824 Asheboro | 35°39'33" | 79°46'37" |
| 7 | statistics | 0209665940 | Rock Creek Tributary at Stoney Creek Golf Course near Sedalia, NC | Unnamed Tributary to Rock Creek | 36°03'54" | 79°35'58" |
| 8 | statistics | 0209665990 | Rock Creek above Rock Creek Tributary near Whitsett, NC | Rock Creek at Hwy 70 near Gibsonville | 36°03'57" | 79°35'58" |
| 9 | statistics | 0209647280 | Service Creek above Dry Creek at Burlington, NC | Service Creek upstream from confluence with Dry Creek | 36°06'34" | 79°24'09" |
| 10 | statistics | 0209647295 | Dry Creek above Service Creek at Burlington, NC | Dry Creek upstream from confluence with Service Creek | 36°06'32" | 79°24'12" |
| 11 | statistics | 0209651815 | Branch Creek below NC 54 near Graham, NC | Unnamed Tributary to Haw at Hwy 54 Burlinton | 36°03'30" | 79°22'42" |
| 12 | statistics | 0209679804 | Little Alamance Creek at SR 2309 near Graham, NC | Little Alamance Creek S. Graham Municipal Park | 36°02'10" | 79°24'37" |
| 13 | statistics | 02085430 | Deep Creek near Moriah, NC | Deep Creek at SR 1734 | 36°14'25" | 78°53'20" |
| 14 | statistics | 02081190 | Tar River near Berea, NC | Tar River at Hwy 158 | 36°20'03" | 78°46'03" |
| 15 | statistics | 02081510 | Foundry Branch at mouth near Oxford, NC | Fishing Creek at Knotts Grove Road | 36°16'41" | 78°35'22" |
| 16 | statistics | 0208501535 | Strouds Creek at St. Mary's Road near Hillsborough, NC | Tributary to Eno at St. Mary's Road (near Hillsborough) | 36°05'15" | 79°03'53" |
| 17 | statistics | 0208500600 | Cates Creek near Hillsborough, NC | Tributary to Eno Creek at Bus. 70, Hillsborough | 36°03'55" | 79°05'14" |
| 18 | statistics | 02097464 | Morgan Creek near White Cross, NC | Morgan Creek at Rt. 54 (west of Chapel Hill) | 35°55'25" | 79°06'56" |
| 19 | statistics | 02097355 | Bolin Creek above Franklin Street near Chapel Hill, NC | Bolin Creek at Franklin Street & Estes Drive | 35°55'38" | 79°02'18" |
| 20 | statistics | 0209750881 | Wilson Creek at mouth near Chapel Hill, NC | Wilson Creek at Culbreth Drive | 35°53'30" | 79°03'40" |
| 21 | statistics | 0209695780 | Brooks Creek at Eddie Perry Road near Bynum, NC | Brooks Creek at Eddie Perry Road | 35°46'34" | 79°10'04" |
| 22 | statistics | 0209697900 | Pokeberry Creek near Pittsboro, NC | Pokeberry Creek at Bynum Ridge Road | 35°46'28" | 79°07'13" |
| 23 | statistics | 0208726995 | Hare Snipe Creek Tributary at SR 1822 near Leesville, NC | Hare Snipe Creek Tributary at SR 1822 near Leesville | 35°52'30" | 78°41'44" |
| 24 | statistics | 0208725055 | Black Creek at Weston Parkway near Cary, NC | Black Creek at Weston Parkway, Cary | 35°49'48" | 78°47'10" |
| 25 | statistics | 0208726370 | Richlands Creek at Schenck Forest near Cary, NC | Richland Creek off Ebenezer Church Road | 35°50'02" | 78°43'12" |
| 26 | statistics | 02087304 | Beaverdam Creek at Glenwood Avenue at Raleigh, NC | Beaverdam Creek at Glenwood Road, Raleigh | 35°48'56" | 78°39'41" |
| 27 | statistics | 0208732610 | Pigeon House Branch at Crabtree Blvd at Raleigh, NC | Pigeon House Creek at Crabtree Blvd. | 35°48'25" | 78°36'50" |
| 28 | statistics | 02087580 | Swift Creek near Apex, NC | Swift Creek at Holly Springs Road | 35°43'07" | 78°45'09" |
| 29 | statistics | 0208758440 | Dutchmans Branch at SR 1386 near McCullers, NC | Duthchman's Branch at Graham Newton Road | 35°41'32" | 78°44'07" |
| 30 | statistics | 0208794555 | Camp Branch above SR 1390 near Holly Springs, NC | Camp Branch at Optimist Farm Road | 35°39'44" | 78°46'12" |
Biological Richness Information
| Map No | Station ID | Watershed Name | Area (sq km) | Fish Taxa Richness | Algae Taxa Richness | Invert Taxa Richness | Invert EPTR | Invert avg Tolerance | ULUG Urban Index |
|---|---|---|---|---|---|---|---|---|---|
| Distribution Map | Distribution Map | Distribution Map | Distribution Map | Distribution Map | |||||
| 1 | 0211583580 | Bowen Branch near mouth at Winston-Salem, NC | 5.0 | 3 | 53 | 30 | 2 | 6.5108 | 85.1 |
| 2 | 02099480 | Richland Creek near Archdale, NC | 32.7 | 10 | 67 | 53 | 9 | 5.9767 | 56.8 |
| 3 | 02099238 | Bull Run at NC 29/70 near Jamestown, NC | 17.9 | 11 | 80 | 58 | 10 | 6.1791 | 51.8 |
| 4 | 0209517912 | North Buffalo Creek at Greensboro, NC | 12.6 | 13 | 60 | 38 | 3 | 7.1798 | 85.6 |
| 5 | 02100294 | Hasketts Creek below Penwood Branch near Asheboro, NC | 30.4 | 8 | 64 | 54 | 6 | 7.0304 | 41.9 |
| 6 | 02100634 | Vestal Creek near Asheboro, NC | 16.5 | 13 | 59 | 61 | 10 | 6.2465 | 27.9 |
| 7 | 0209665940 | Rock Creek Tributary at Stoney Creek Golf Course near Sedalia, NC | 11.6 | 10 | 70 | 72 | 20 | 5.5022 | 12.2 |
| 8 | 0209665990 | Rock Creek above Rock Creek Tributary near Whitsett, NC | 26.0 | 11 | 76 | 68 | 14 | 5.4956 | 3.9 |
| 9 | 0209679804 | Little Alamance Creek at SR 2309 near Graham, NC | 37.3 | 16 | 78 | 47 | 4 | 6.5398 | 64.4 |
| 10 | 0209647280 | Service Creek above Dry Creek at Burlington, NC | 12.7 | 15 | 69 | 53 | 8 | 6.4113 | 49.3 |
| 11 | 0209647295 | Dry Creek above Service Creek at Burlington, NC | 6.5 | 15 | 66 | 46 | 4 | 6.9557 | 89.2 |
| 12 | 0209651815 | Branch Creek below NC 54 near Graham, NC | 4.9 | 8 | 62 | 49 | 3 | 6.7874 | 76.4 |
| 13 | 02085430 | Deep Creek near Moriah, NC | 82.5 | 19 | 55 | 53 | 18 | 5.0600 | 2.0 |
| 14 | 02081190 | Tar River near Berea, NC | 66.3 | 21 | 75 | 68 | 17 | 5.7681 | 0.0 |
| 15 | 0208151000 | Foundry Branch at mouth near Oxford, NC | 12.6 | 14 | 85 | 45 | 5 | 6.8783 | 38.9 |
| 16 | 0208501535 | Strouds Creek at St. Mary's Rd near Hillsborough, NC | 23.2 | 18 | 57 | 72 | 22 | 5.5144 | 7.2 |
| 17 | 0208500600 | Cates Creek near Hillsborough, NC | 10.9 | 15 | 62 | 57 | 15 | 5.6532 | 14.5 |
| 18 | 02097464 | Morgan Creek near White Cross, NC | 21.5 | 12 | 61 | 81 | 19 | 5.6708 | 4.9 |
| 19 | 02097355 | Bolin Creek above Franklin Street near Chapel Hill, NC | 29.8 | 21 | 70 | 39 | 7 | 5.9533 | 42.5 |
| 20 | 0209750881 | Wilson Creek at mouth near Chapel Hill, NC | 9.2 | 14 | 73 | 45 | 8 | 5.3905 | 24.1 |
| 21 | 0209697900 | Pokeberry Creek near Pittsboro, NC | 29.8 | 16 | 70 | 62 | 16 | 5.3828 | 4.4 |
| 22 | 0209695780 | Brooks Creek at Eddie Perry Road near Bynum, NC | 23.9 | 23 | 55 | 64 | 15 | 5.3480 | 2.1 |
| 23 | 0208726995 | Hare Snipe Creek Tributary at SR 1822 near Leesville, NC | 16.0 | 18 | 67 | 46 | 5 | 6.5456 | 73.6 |
| 24 | 0208725055 | Black Creek at Weston Parkway near Cary, NC | 9.0 | 13 | 49 | 61 | 8 | 6.7420 | 79.6 |
| 25 | 0208726370 | Richlands Creek at Schenck Forest near Cary, NC | 11.2 | 11 | 58 | 34 | 3 | 6.4614 | 33.2 |
| 26 | 02087304 | Southwest Prong Beaverdam Creek at Raleigh, NC | 8.0 | 9 | 57 | 40 | 2 | 6.6075 | 90.8 |
| 27 | 0208732610 | Pigeon House Creek at Crabtree Blvd at Raleigh, NC | 11.4 | 18 | 49 | 31 | 2 | 6.8802 | 100.0 |
| 28 | 02087580 | Swift Creek near Apex, NC | 54.3 | 15 | 43 | 57 | 8 | 6.7420 | 58.5 |
| 29 | 0208758440 | Dutchmans Branch at SR 1386 near McCullers Crossroads, NC | 11.7 | 15 | 64 | 51 | 8 | 5.9404 | 28.6 |
| 30 | 0208794025 | Camp Branch at SR 1390 near Holly Springs, NC | 5.5 | 16 | 86 | 51 | 10 | 5.8045 | 12.9 |
How do the hydrologic, geomorphic, chemical, and biological characteristics of stream ecosystems respond to land-use changes associated with urbanization, and how do these responses vary across environmental settings?
SPECIFIC OBJECTIVES:
-
Determine the hydrological, geomorphic, chemical, habitat, and biological characteristics that respond to land-use changes associated with urbanization in specific environmental settings.
-
Determine the most important landscape features influencing hydrological, chemical, geomorphic, habitat, and ecological responses to urbanization.
-
Compare the hydrological, geomorphic, chemical, habitat, and biological responses to urbanization among a range of environmental settings.
-
Determine the physical and chemical factors associated with biological responses and compare these physical and chemical factors across environmental settings.
-
Develop empirical models to relate physical, chemical, and biological responses to landscape features associated with urbanization.
An investigation of the urban crescent from Raleigh to Winston-Salem N.C. is underway to study the relation between varying levels of urban intensity in drainage basins and in-stream water quality, measured by physical, chemical, and biological factors. Water quality has been sampled in 30 drainage basins that have similar natural (e.g., climate, elevation, soils) characteristics and represent a gradient of urban intensity.
The urban intensity of each basin is measured using an index that integrates information about the multiple dimensions of human influence on the urban landscape at the drainage basin scale. The index includes information about land cover, infrastructure, population, and socioeconomic characteristics. Some of the variables used in the index may also be important factors for explaining variations in water quality.
The gradient design used in the NAWQA Program to investigate the effects of urbanization is premised on two perspectives about water-quality.
First, instream water-quality is a composite of physical, chemical, and biological characteristics that are influenced by natural factors and by the human activities. Biological communities reflect the integration of these influences.
Second, landscape and stream characteristics reflect both the physical context of a basin and human influences. The character of the urban residential landscape, for example, can vary dramatically as socioeconomic factors - income, age of housing stock, levels of education - change among neighborhoods.
Investigation of the effects of urbanization on water quality must control for the effects of natural factors, while allowing the degree of urbanization to vary between study basins. By narrowing the focus the study to a single ecoregion, the North Carolina Piedmont, the investigation used a regional framework that enforces a measure of control over variability in natural factors that influence water-quality.
The data collected at streams in the study included nutrients, pesticides, and ions in stream water, geomorphic and habitat characteristics, hydrologic stage, water temperature, pH, dissolved oxygen, specific conductance, benthic algae and invertebrate communities, and fish communities.
Watershed Site Information
| Map No. | Water Quality Data | Site No. | Site Name | Location | Latitude | Longitude |
|---|---|---|---|---|---|---|
| 1 | statistics | 0211583580 | Bowen Branch near mouth at Winston-Salem, NC | Bowen Branch Tributary near Bowen Road | 36°07'05" | 80°12'46" |
| 2 | statistics | 02099480 | Richland Creek near Archdale, NC | Richland Creek at Kersy Valley Road SR 1154 | 35°56'28" | 79°55'56" |
| 3 | statistics | 02099238 | Bull Run at NC 29/70 near Jamestown, NC | Bull Run on High Point Road or Vickery Chapel Road | 35°59'53" | 79°55'36" |
| 4 | statistics | 0209517912 | North Buffalo Creek at Greensboro, NC | Unnamed Tributary at Green Valley Parkway | 36°05'21" | 79°49'44" |
| 5 | statistics | 02100294 | Hasketts Creek below SR 2149 near Central Falls, NC | Hasketts Creek at SR 2128 Wow Road | 35°46'04" | 79°46'44" |
| 6 | statistics | 02100634 | Vestal Creek near Asheboro, NC | Vestal Creek at Pine Hill Road SR 2824 Asheboro | 35°39'33" | 79°46'37" |
| 7 | statistics | 0209665940 | Rock Creek Tributary at Stoney Creek Golf Course near Sedalia, NC | Unnamed Tributary to Rock Creek | 36°03'54" | 79°35'58" |
| 8 | statistics | 0209665990 | Rock Creek above Rock Creek Tributary near Whitsett, NC | Rock Creek at Hwy 70 near Gibsonville | 36°03'57" | 79°35'58" |
| 9 | statistics | 0209647280 | Service Creek above Dry Creek at Burlington, NC | Service Creek upstream from confluence with Dry Creek | 36°06'34" | 79°24'09" |
| 10 | statistics | 0209647295 | Dry Creek above Service Creek at Burlington, NC | Dry Creek upstream from confluence with Service Creek | 36°06'32" | 79°24'12" |
| 11 | statistics | 0209651815 | Branch Creek below NC 54 near Graham, NC | Unnamed Tributary to Haw at Hwy 54 Burlinton | 36°03'30" | 79°22'42" |
| 12 | statistics | 0209679804 | Little Alamance Creek at SR 2309 near Graham, NC | Little Alamance Creek S. Graham Municipal Park | 36°02'10" | 79°24'37" |
| 13 | statistics | 02085430 | Deep Creek near Moriah, NC | Deep Creek at SR 1734 | 36°14'25" | 78°53'20" |
| 14 | statistics | 02081190 | Tar River near Berea, NC | Tar River at Hwy 158 | 36°20'03" | 78°46'03" |
| 15 | statistics | 02081510 | Foundry Branch at mouth near Oxford, NC | Fishing Creek at Knotts Grove Road | 36°16'41" | 78°35'22" |
| 16 | statistics | 0208501535 | Strouds Creek at St. Mary's Road near Hillsborough, NC | Tributary to Eno at St. Mary's Road (near Hillsborough) | 36°05'15" | 79°03'53" |
| 17 | statistics | 0208500600 | Cates Creek near Hillsborough, NC | Tributary to Eno Creek at Bus. 70, Hillsborough | 36°03'55" | 79°05'14" |
| 18 | statistics | 02097464 | Morgan Creek near White Cross, NC | Morgan Creek at Rt. 54 (west of Chapel Hill) | 35°55'25" | 79°06'56" |
| 19 | statistics | 02097355 | Bolin Creek above Franklin Street near Chapel Hill, NC | Bolin Creek at Franklin Street & Estes Drive | 35°55'38" | 79°02'18" |
| 20 | statistics | 0209750881 | Wilson Creek at mouth near Chapel Hill, NC | Wilson Creek at Culbreth Drive | 35°53'30" | 79°03'40" |
| 21 | statistics | 0209695780 | Brooks Creek at Eddie Perry Road near Bynum, NC | Brooks Creek at Eddie Perry Road | 35°46'34" | 79°10'04" |
| 22 | statistics | 0209697900 | Pokeberry Creek near Pittsboro, NC | Pokeberry Creek at Bynum Ridge Road | 35°46'28" | 79°07'13" |
| 23 | statistics | 0208726995 | Hare Snipe Creek Tributary at SR 1822 near Leesville, NC | Hare Snipe Creek Tributary at SR 1822 near Leesville | 35°52'30" | 78°41'44" |
| 24 | statistics | 0208725055 | Black Creek at Weston Parkway near Cary, NC | Black Creek at Weston Parkway, Cary | 35°49'48" | 78°47'10" |
| 25 | statistics | 0208726370 | Richlands Creek at Schenck Forest near Cary, NC | Richland Creek off Ebenezer Church Road | 35°50'02" | 78°43'12" |
| 26 | statistics | 02087304 | Beaverdam Creek at Glenwood Avenue at Raleigh, NC | Beaverdam Creek at Glenwood Road, Raleigh | 35°48'56" | 78°39'41" |
| 27 | statistics | 0208732610 | Pigeon House Branch at Crabtree Blvd at Raleigh, NC | Pigeon House Creek at Crabtree Blvd. | 35°48'25" | 78°36'50" |
| 28 | statistics | 02087580 | Swift Creek near Apex, NC | Swift Creek at Holly Springs Road | 35°43'07" | 78°45'09" |
| 29 | statistics | 0208758440 | Dutchmans Branch at SR 1386 near McCullers, NC | Duthchman's Branch at Graham Newton Road | 35°41'32" | 78°44'07" |
| 30 | statistics | 0208794555 | Camp Branch above SR 1390 near Holly Springs, NC | Camp Branch at Optimist Farm Road | 35°39'44" | 78°46'12" |
Biological Richness Information
| Map No | Station ID | Watershed Name | Area (sq km) | Fish Taxa Richness | Algae Taxa Richness | Invert Taxa Richness | Invert EPTR | Invert avg Tolerance | ULUG Urban Index |
|---|---|---|---|---|---|---|---|---|---|
| Distribution Map | Distribution Map | Distribution Map | Distribution Map | Distribution Map | |||||
| 1 | 0211583580 | Bowen Branch near mouth at Winston-Salem, NC | 5.0 | 3 | 53 | 30 | 2 | 6.5108 | 85.1 |
| 2 | 02099480 | Richland Creek near Archdale, NC | 32.7 | 10 | 67 | 53 | 9 | 5.9767 | 56.8 |
| 3 | 02099238 | Bull Run at NC 29/70 near Jamestown, NC | 17.9 | 11 | 80 | 58 | 10 | 6.1791 | 51.8 |
| 4 | 0209517912 | North Buffalo Creek at Greensboro, NC | 12.6 | 13 | 60 | 38 | 3 | 7.1798 | 85.6 |
| 5 | 02100294 | Hasketts Creek below Penwood Branch near Asheboro, NC | 30.4 | 8 | 64 | 54 | 6 | 7.0304 | 41.9 |
| 6 | 02100634 | Vestal Creek near Asheboro, NC | 16.5 | 13 | 59 | 61 | 10 | 6.2465 | 27.9 |
| 7 | 0209665940 | Rock Creek Tributary at Stoney Creek Golf Course near Sedalia, NC | 11.6 | 10 | 70 | 72 | 20 | 5.5022 | 12.2 |
| 8 | 0209665990 | Rock Creek above Rock Creek Tributary near Whitsett, NC | 26.0 | 11 | 76 | 68 | 14 | 5.4956 | 3.9 |
| 9 | 0209679804 | Little Alamance Creek at SR 2309 near Graham, NC | 37.3 | 16 | 78 | 47 | 4 | 6.5398 | 64.4 |
| 10 | 0209647280 | Service Creek above Dry Creek at Burlington, NC | 12.7 | 15 | 69 | 53 | 8 | 6.4113 | 49.3 |
| 11 | 0209647295 | Dry Creek above Service Creek at Burlington, NC | 6.5 | 15 | 66 | 46 | 4 | 6.9557 | 89.2 |
| 12 | 0209651815 | Branch Creek below NC 54 near Graham, NC | 4.9 | 8 | 62 | 49 | 3 | 6.7874 | 76.4 |
| 13 | 02085430 | Deep Creek near Moriah, NC | 82.5 | 19 | 55 | 53 | 18 | 5.0600 | 2.0 |
| 14 | 02081190 | Tar River near Berea, NC | 66.3 | 21 | 75 | 68 | 17 | 5.7681 | 0.0 |
| 15 | 0208151000 | Foundry Branch at mouth near Oxford, NC | 12.6 | 14 | 85 | 45 | 5 | 6.8783 | 38.9 |
| 16 | 0208501535 | Strouds Creek at St. Mary's Rd near Hillsborough, NC | 23.2 | 18 | 57 | 72 | 22 | 5.5144 | 7.2 |
| 17 | 0208500600 | Cates Creek near Hillsborough, NC | 10.9 | 15 | 62 | 57 | 15 | 5.6532 | 14.5 |
| 18 | 02097464 | Morgan Creek near White Cross, NC | 21.5 | 12 | 61 | 81 | 19 | 5.6708 | 4.9 |
| 19 | 02097355 | Bolin Creek above Franklin Street near Chapel Hill, NC | 29.8 | 21 | 70 | 39 | 7 | 5.9533 | 42.5 |
| 20 | 0209750881 | Wilson Creek at mouth near Chapel Hill, NC | 9.2 | 14 | 73 | 45 | 8 | 5.3905 | 24.1 |
| 21 | 0209697900 | Pokeberry Creek near Pittsboro, NC | 29.8 | 16 | 70 | 62 | 16 | 5.3828 | 4.4 |
| 22 | 0209695780 | Brooks Creek at Eddie Perry Road near Bynum, NC | 23.9 | 23 | 55 | 64 | 15 | 5.3480 | 2.1 |
| 23 | 0208726995 | Hare Snipe Creek Tributary at SR 1822 near Leesville, NC | 16.0 | 18 | 67 | 46 | 5 | 6.5456 | 73.6 |
| 24 | 0208725055 | Black Creek at Weston Parkway near Cary, NC | 9.0 | 13 | 49 | 61 | 8 | 6.7420 | 79.6 |
| 25 | 0208726370 | Richlands Creek at Schenck Forest near Cary, NC | 11.2 | 11 | 58 | 34 | 3 | 6.4614 | 33.2 |
| 26 | 02087304 | Southwest Prong Beaverdam Creek at Raleigh, NC | 8.0 | 9 | 57 | 40 | 2 | 6.6075 | 90.8 |
| 27 | 0208732610 | Pigeon House Creek at Crabtree Blvd at Raleigh, NC | 11.4 | 18 | 49 | 31 | 2 | 6.8802 | 100.0 |
| 28 | 02087580 | Swift Creek near Apex, NC | 54.3 | 15 | 43 | 57 | 8 | 6.7420 | 58.5 |
| 29 | 0208758440 | Dutchmans Branch at SR 1386 near McCullers Crossroads, NC | 11.7 | 15 | 64 | 51 | 8 | 5.9404 | 28.6 |
| 30 | 0208794025 | Camp Branch at SR 1390 near Holly Springs, NC | 5.5 | 16 | 86 | 51 | 10 | 5.8045 | 12.9 |