Document: NUREG-1555
Document ID: d196063a-7dbb-4b68-86d9-5aeb781a0655
Document Type: esrp
Title: HYDROLOGY
Source: NUREG-1555
Source URL: https://www.nrc.gov/reading-rm/doc-collections/nuregs/staff/sr1555/initial/
Revision Date: 2007-10
Chapter: 2
Section ID: 2.3.1
CFR Part: 
CFR Title: 

Content:
Surface-water data and information to be obtained fall under three categories: freshwater streams, lakes and impoundments, and estuaries and oceans. The following data and information about freshwater streams (for the watershed containing the site) should be obtained: ` a list of major streams, size of drainage areas, and gradient (from the ER and consultation with Federal, State, regional, local, and Native American tribal agencies) October 1999 2.3.1-3 NUREG-1555 ` maximum, average maximum, average, average minimum, and minimum monthly flow (from the ER and the general literature) ` flood frequency distributions (from the ER and the general literature), including levee failures (from the ER and the general literature) ` flood control measures (reservoirs, levees, flood forecasting) (from the ER, the general literature, and the site visit) ` historical drought stages and discharges by month, and the 7-day once-in-10-years low flow (from the ER and the general literature) ` important short-duration flow fluctuations (e.g., diurnal release variations from peaking operation of upstream hydroelectric project) (from the ER and consultation with local agencies) ` within the influence of the intake and discharge structures, velocity distribution (horizontal and vertical), bathymetry at and near the intake structure, bathymetry at and downstream of the discharge structure, and stream cross-sections (from the ER) ` other hydrographic modifications (e.g., diversion dams, channelization) (from the ER and site visit) ` a list of wetlands and floodplains and their seasonal characteristics. The following data and information about lakes and impoundments should be obtained: ` a description of lake or impoundment (from the ER and site visit) ` where influenced by the intake or discharge structures, or vice versa, size, location, and elevation of outlets (from the ER and the general literature) ` where influenced by the intake or discharge structures, or vice versa,