April 11, 2022
Glossary Category:
April 11, 2022
April 11, 2022
NGVD – A vertical datum is a surface of zero elevation to which heights of various points are referenced. The NVGD of 1929 was utilized until […]
April 11, 2022
The National Register of Historic Places is the official list of the Nation’s historic places worthy of preservation. Authorized by the National Historic Preservation Act of […]
April 11, 2022
Nature-like fishways mimic natural side channels and are placed next to migration barriers. They include a wide variety of designs such as step‐pools, roughened ramps, rock‐arch […]
April 11, 2022
National Geodetic Vertical Datum – A vertical datum is a surface of zero elevation to which heights of various points are referenced. The NVGD of 1929 […]
April 11, 2022
The National Pollutant Discharge Elimination System permit program addresses water pollution by regulating point sources that discharge pollutants to waters of the United States. Hydropower projects often have […]
April 11, 2022
The amount of nutrients entering a system in a period of time. The overloading of nutrients in a system leads to eutrophication, causing excessive growth of […]
April 11, 2022
A double curve shaped like an elongated S, usually associated with a spillway configuration designed with optimal overflow characteristics.