Document: NUREG-0800
Document ID: 904b56ce-40c5-4058-b0ad-837d98f63c2a
Document Type: srp
Title: PROBABLE MAXIMUM FLOOD (PMF) ON STREAMS AND RIVERS
Source: NUREG-0800
Source URL: https://www.nrc.gov/docs/ML0707/ML070730405.pdf
Revision Date: 2023-06
Chapter: 2
Section ID: 2.4.3
CFR Part: 
CFR Title: 

Content:
UEST MISSING DATA & ANALYSIS EVALUATE RESPONSES CHECK PROBABLE MAXIMUM PRECIPITATION (PMP) ESTIMATES USING APPROPRIATE NOAA HYDROMET REPORTS. IS REG GUIDE 1.59 POSITION 2 ELECTED. YES NO DETERMINE SPF PRECIPITATION DISTRIBUTION USING GENERALIZED RAINFALL CRITERIA OR EQUIVALENT. MODEL PMF (AND SPF IF REQUIRED) RESERVOIR OPERATION USING APPROPRIATE CORPS OF ENGRS. HYDROLOGY AND HYDRAULICS MODELS. “DAY SITE” ACCEPTABLE BY INSPECTION. LOCATE SITE WITH RESPECT TO MAJOR AND MINOR STREAMS AND RIVERS. DETERMINE WHETHER LOCATION AND EVALUATION OF SITE PRECLUDE AND POSSIBILITY OF FLOODING. OBTAIN ANY ACCEPTED CORPS OF ENGRS. PMF (& SPF IF REQUIRED) STUDIES IN THE REGION. REVIEW CORPS OF ENGRS. PMF ESTIMATE FOR ACCEPTABILITY WITH PRESENT PRACTICES. COMPARE SAR ESTIMATE OF PMF WITH CORPS OF ENGRS. ESTIMATE. IF CORPS OF ENGRS. IN GENERAL SITE AREA AND NO MAJOR INTERMEDIATE DRAINAGE AREA EXITS BETWEEN THE LOCATION OF THE TWO ESTIMATES. OBTAIN MAPS OF DRAINAGE AREAS FROM USGS IF SAR IS NOT ADEQUATE. OBTAIN USBR WATER SUPPLY PAPERS, CORPS OF ENGRS. DESIGN MEMOS, SURVEY REPORTS OR BASIN STUDY REPORTS, SCS STUDIES, OR USBR REPORTS ON FLOODS. DETERMINE LOCATION SIZE AND PURPOSES OF EXITING AND PROPOSED RESERVOIRS IN THE REGION USING APPLICANT’S SAR, CORPS OF ENGRS. NATIONAL INVENTORY OF DAMS, USGS MAPS, WATER RESOURCES COUNCIL, MAP AND REPORTS. SPOT CHECK UNIT HYDROGRAPH CHARACTERISTICS FROM MAPS AND REPORTS. DETERMINE WHETHER APPLICANT’S SAR PMF MAXIMUM WATER SURFACE ELEVATION ESTIMATE IS WITHIN 5% OF ACCEPTABLE CORPS OF ENGRS. OR GENERALIZED ESTIMATE OR HIGHER. SPOT CHECK CRITICAL RESERVOIR STORAGE AND SPILLWAY CHARACTERISTICS. MODEL RUNOFF RESPONSE OF BASIN USING CORPS OF ENGRS. FLOOD ROUTING MODELS. CHECK WATER SURFACE ELEVATION DETERMINATION BY SLOPE AREA. MODEL WATER SURFACE PROFILES USING CORPS OF ENGRS. HYDROLOGY AND HYDRAULICS MODELS. EVALUATE WIND-WAVE POTENTIAL USING CORPS OF ENGRS. COASTAL ENGR. MANUAL OR OTHER APPROPRIATE REFERENCES. EVALUATE APPLICANT’S FLOOD