Books > Social sciences > Politics & government
|
Buy Now
Effects of Flood Control and Other Reservoir Operations on the Water Quality of the Lower Roanoke River, North Carolina - Usgs Scientific Investigations Report 2012-5101 (Paperback)
Loot Price: R463
Discovery Miles 4 630
|
|
Effects of Flood Control and Other Reservoir Operations on the Water Quality of the Lower Roanoke River, North Carolina - Usgs Scientific Investigations Report 2012-5101 (Paperback)
(sign in to rate)
Loot Price R463
Discovery Miles 4 630
Expected to ship within 10 - 15 working days
|
The Roanoke River is an important natural resource for North
Carolina, Virginia, and the Nation. Flood plains of the lower
Roanoke River, which extend from Roanoke Rapids Dam to Batchelor
Bay near Albemarle Sound, support a large and diverse population of
nesting birds, waterfowl, freshwater and anadromous fish, and other
wildlife, including threatened and endangered species. The flow
regime of the lower Roanoke River is affected by a number of
factors, including flood-management operations at the upstream John
H. Kerr Dam and Reservoir. A three-dimensional, numerical
water-quality model was developed to explore links between upstream
flows and downstream water quality, specifically in-stream
dissolved-oxygen dynamics. Calibration of the hydrodynamics and
dissolved-oxygen concentrations emphasized the effect that
flood-plain drainage has on water and oxygen levels, especially at
locations more than 40 kilometers away from the Roanoke Rapids Dam.
Model hydrodynamics were calibrated at three locations on the lower
Roanoke River, yielding coefficients of determination between 0.5
and 0.9. Dissolved-oxygen concentrations were calibrated at the
same sites, and coefficients of determination ranged between 0.6
and 0.8. The model has been used to quantify relations among river
flow, flood-plain water level, and in-stream dissolved-oxygen
concentrations in support of management of operations of the John
H. Kerr Dam, which affects overall flows in the lower Roanoke
River. Scenarios have been developed to mitigate the negative
effects that timing, duration, and extent of flood-plain inundation
may have on vegetation, wildlife, and fisheries in the lower
Roanoke River corridor. Under specific scenarios, the model
predicted that mean dissolved-oxygen concentrations could be
increased by 15 percent by flow-release schedules that minimize the
drainage of anoxic flood-plain waters. The model provides a tool
for water-quality managers that can help identify options that
improve water quality and protect the aquatic habitat of the
Roanoke River.
General
Is the information for this product incomplete, wrong or inappropriate?
Let us know about it.
Does this product have an incorrect or missing image?
Send us a new image.
Is this product missing categories?
Add more categories.
Review This Product
No reviews yet - be the first to create one!
|
|
Email address subscribed successfully.
A activation email has been sent to you.
Please click the link in that email to activate your subscription.