Memorandum of Understanding – a document describing a bilateral agreement between parties.

由上游面的一系列拱門組成的支墩壩。

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 […]

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 […]

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 […]

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 […]

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 […]

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 […]

形狀像細長 S 形的雙曲線，通常與具有最佳溢流特性的溢洪道配置相關。