Annual peak discharges and stages for gaging stations in Georgia through September 1990

Hess, Glen W.; Stamey, Timothy C.

doi:10.3133/ofr92113

Cited by 3 publications

(7 citation statements)

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“…bRecurrence interval of channel capacity discharge. Cweighted peak discharge for gaging stations was obtained from Hess and Stamey (1993); weighted peak discharge for non-gaged sites was determined by weighting flood discharges computed from regional regression equations with nearest gaging station data.…”

Section: Resultsmentioning

confidence: 99%

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CHANNEL MORPHOLOGY EVOLUTION AND OVERBANK FLOW IN THE GEORGIA PIEDMONT¹

Ruhiman

Nutter

1999

J American Water Resour Assoc

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Historic changes in stream channel morphology were investigated in the Georgia Piedmont to better understand the hydrologic processes and functioning of the region's riverine systems. USGS gaging station data and channel geomorphology data were collected from thirty study sites in the Upper Oconee River Basin for flood frequency analysis. Historic and modern (i.e., present‐day) channel capacity discharge (i.e., overbank flow) was calculated using Manning's equation and historic channel cross‐section records. The recurrence interval for overbank flow was estimated for each site from flood frequency data. Results indicate that channel expansion has occurred throughout the basin, especially in upper reaches. Recurrence intervals for modern overbank events were variable and generally high ranging from < 2 to > 500 years for first to third order streams. They were less variable and lower for fourth and fifth order streams, ranging from < 2 to 3 years. Potential depositional thresholds were identified that exemplify the complex response of sediment distribution patterns throughout the basin. Results indicate overbank flows occur less frequently now than they once did due to historic accelerated sedimentation and subsequent channel expansion. One application of these findings is that these basin processes are likely applicable across the region and may impact the hydrologic functioning of associated Piedmont riverine wetlands that depend on flooding regimes.

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Section: Resultsmentioning

confidence: 99%

“…Channel capacity discharge was obtained for each station either from Hess and Stamey (1993), or was estimated using Manning's equation (Dunne and Leopold, 1978). For the Manning method, channel capacity cross-sectional area was measured in the field at a representative reach of stream.…”

Section: Gaging Station Sitesmentioning

confidence: 99%

CHANNEL MORPHOLOGY EVOLUTION AND OVERBANK FLOW IN THE GEORGIA PIEDMONT¹

Ruhiman

Nutter

1999

J American Water Resour Assoc

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“…The peak-flow record at the Savannah River at Augusta, GA, streamgaging station includes continuous peakflow data since 1876. Prior to that, local residents marked the crest of large floods, which local newspapers also reported (Hess and Stamey, 1993). The USGS peak-flow record for Savannah River at Augusta further validates this was a particularly wet period in the late 1800s and early 1900s with the largest four floods occurring in October 1929, September 1929, 1908, and 1888.…”

Section: Analysis Of Surface-water Peak Flows and Potential Effect Ofmentioning

confidence: 66%

“…Noted as being the largest flood at that site since 1888, the largest flood of record occurred on August 25, 1908. The next two largest floods occurred in water years 1902and 1912, 1890190019101920193019401950WATER YEAR 1960197019801990 2000 2010 respectively. At Congaree River Columbia and Broad River Carlton, there are 107 years in which both streamgages were operated concurrently.…”

Section: Analysis Of Surface-water Peak Flows and Potential Effect Ofmentioning

confidence: 99%

The Effects of the Saluda Dam on the Surface-Water and Ground-Water Hydrology of the Congaree National Park Flood Plain, South Carolina

Conrads¹,

Feaster²,

Harrelson³

2008

Scientific Investigations Report

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“…For the region including the Turner Creek watershed, this corresponds to the 100-year flood, which supports our assumption that the storm probability and flood probability may be closely aligned. This validation was greatly enhanced by recent compilations on rainfall-runoff relationships in Georgia that document regional relationships for hydrograph parameters (Inman 1987) and runoff (Price and Hess 1986;Stamey and Hess 1993;Hess and Stamey 1993). The loss-rate parameters and lag-time coefficients were calculated based on basin characteristics (Inman 1987) and input into HEC-1 for each of the six subbasins, and the simulated routed discharges were compared to discharges estimated from regional drainage area-discharge curves ( Figure 5).…”

Section: Methodsmentioning

confidence: 99%

Historical Land-Cover Changes and Hydrogeomorphic Adjustment in a Small Georgia Watershed

Magilligan¹,

Stamp

1997

Annals of the Association of American Geographers

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This study utilizes hydrologic modeling (HEC-1) for discrete episodes of land use in a Georgia watershed to portray the hydrologic adjustments that occur during a period of intensive land clearing and subsequent revegetation. It then compares these hydrologic shifts to field-based geomorphic adjustments such as gullying and valley aggradation. The Turner Creek watershed, settled in the mid-1830s, experienced a period of rapid land clearing with intensive cotton production (~90 years) and then an extended period of reforestation (~70 years), which generated hydrologic and geomorphic adjustments. Deep canyon formation in the poorly consolidated Coastal Plain lithologies occurred rapidly (~30 years), causing upwards of 50 m of dissection. Results indicate that a new hydrologic regime has been established relative to both the prehistorical period (ca. 1800) and the period of maximum land clearing (ca. 1880), and that this hydrologic stability was achieved relatively quickly. Some geomorphic adjustments have coincided with the temporal pattern of hydrologic shifts. Aggradation rates, as determined by dendrochronology, have been a little slower to adjust but indicate an overall attenuation since 1948. Current sedimentation, unlike previous periods, is now most likely linked to the magnitude of spring storms. On the other hand, valley-side gully formation and stabilization are strongly linked to the pattern of hydrologic adjustments, as controlled by land-use patterns. Thus, this research indicates that watershed recovery and stability may be achieved, but it may differ from predisturbance conditions, and that not all hydrogeomorphic components respond similarly.

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Annual peak discharges and stages for gaging stations in Georgia through September 1990

Cited by 3 publications

References 0 publications

CHANNEL MORPHOLOGY EVOLUTION AND OVERBANK FLOW IN THE GEORGIA PIEDMONT¹

CHANNEL MORPHOLOGY EVOLUTION AND OVERBANK FLOW IN THE GEORGIA PIEDMONT¹

The Effects of the Saluda Dam on the Surface-Water and Ground-Water Hydrology of the Congaree National Park Flood Plain, South Carolina

Historical Land-Cover Changes and Hydrogeomorphic Adjustment in a Small Georgia Watershed

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Annual peak discharges and stages for gaging stations in Georgia through September 1990

Cited by 3 publications

References 0 publications

CHANNEL MORPHOLOGY EVOLUTION AND OVERBANK FLOW IN THE GEORGIA PIEDMONT1

CHANNEL MORPHOLOGY EVOLUTION AND OVERBANK FLOW IN THE GEORGIA PIEDMONT1

The Effects of the Saluda Dam on the Surface-Water and Ground-Water Hydrology of the Congaree National Park Flood Plain, South Carolina

Historical Land-Cover Changes and Hydrogeomorphic Adjustment in a Small Georgia Watershed

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CHANNEL MORPHOLOGY EVOLUTION AND OVERBANK FLOW IN THE GEORGIA PIEDMONT¹

CHANNEL MORPHOLOGY EVOLUTION AND OVERBANK FLOW IN THE GEORGIA PIEDMONT¹