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
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CFR Title: 

Content:
lating water rights. ` Regulatory Guide 4.2, Rev. 2, Preparation of Environmental Reports for Nuclear Power Stations (NRC 1976), contains guidance on the format and content of ERs including hydrology, water-use, and water-quality issues. Technical Rationale The technical rationale for evaluating the applicant’s description of the area’s hydrology is discussed in the following paragraph: A detailed and thorough description of the hydrologic environment is essential for the evaluation of potential impacts to the environment that may result from plant construction or operation. This ESRP provides the key background material that is essential for understanding the impacts on water use, water quality, land use, ecological systems, and monitoring programs. III. REVIEW PROCEDURES The reviewer’s analysis of hydrology will be closely linked with the environmental reviews described by ESRP Chapters 3.0, 4.0, 5.0, and 6.0 to establish the hydrological characteristics that are most likely to be affected and the adequacy of the related monitoring programs. The reviewer should take the following steps: (1) Identify the monthly and annual ranges and averages, and the historical extremes of the physical and hydrological characteristics of the hydrosphere potentially affecting or affected by plant construction and operation. (2) Adjust the historical data to present or known future conditions (e.g., reservoirs built and operated during the period of record, scheduled construction of dams). (3) Develop data or take measurements using acceptable hydrological techniques if observations are incomplete or unavailable. (4) Determine if the site or any plant-related structure or alteration of the natural topography is on a floodplain or wetland. October 1999 2.3.1-7 NUREG-1555 (5) Use river-basin commissions, State agencies, and Federal agencies, such as the Corps of Engineers and the U.S. Geological Survey (USGS), as possible sources for site-specific data, including the following: