OVERFLOW OF RED RIVER OF THE NORTH. 



23 



Table 5. 



-Recorded and estimated future maximum discharges from streams 

 on Red River tvatershed — Continued. 





Station. 



Water- 

 shed 

 area. 



Period 

 of meas- 

 ure- 

 ment. 



During summer 



floods. 



During spring floods. 



Stream. 



Maxi- 

 mum 



re- 

 corded 



dis- 

 charge. 



Estimated 



future 

 maximum — 



Muxi- 



mum 



re- 



Estimated 



future 

 maximum — 





Dis- 

 charge. 



Run- 

 off. 



dis- 

 charge. 



Dis- 

 charge. 



Run- 

 off. 







Sq. mi. 



1,270 



425 



1,685 



1,950 



1,080 

 3,600 



1,330 

 5,320 

 5,785 

 25, 755 



705 

 1,030 

 760 

 885 

 365 

 765 



635 

 975 



790 



3,320 



3,865 



35, 895 



Years. 



Sec.-ft. 



Sec.-ft. 

 3,810 

 1,700 

 6,740 



1,950 

 5,400 

 10, 800 



6,650 

 15, 960 

 17, 355 

 36, 057 



2,115 

 2,060 



Sec.-ft. 



per 

 sq. mi. 



3 



4 



4 



1 

 5 

 3 



5 

 3 

 3 

 1.4 



3 



2 



3 



2.5 



4 



4 



4 

 3 

 3 



1.2 

 1.2 

 1.1 



Sec.-ft. 



Sec.-ft. 

 3.810 



Sec.-ft. 



per 

 sq. mi. 

 3 



Sandhill River. . . 



do 







1 2,550 



6. 740 



6 



Small streams . . . 



Sheyenne River 



to Grand Forks. 



Outlet 







4 



Red Lake 







4,080 

 7,040 



3,990 

 14,400 



43, 000 



1,200 



3,870 

 46, 180 



2,925 

 4,320 

 9,000 



6,650 

 15, 960 

 17, 355 

 51, 510 



2,115 

 3,090 

 2,660 

 2, 655 

 1,460 

 3,060 



2,540 

 3,900 

 3,160 



4,980 



5,797 



61, 022 



1.5 



Thief River 



Red Lake River 



and Thief 



River. 

 Clearwater River 



Thief River Falls . 

 do 



Red Lake Falls... 



9 

 10 



9 

 19 



4,100 

 7,600 



6,700 

 14, 400 



4 

 2.5 



5 

 3 



Do 



East Grand Forks. 

 Grand Forks, N. 

 Dak. 



3 



Red River 



Turtle River 



38 



22, 360 



2 

 3 





do 







3 





do 









2,280 



3.5 



Park River 



do 







2,212 

 1,460 

 3,060 



2,540 

 2,925 

 2,370 



3,984 

 4,638 

 39, 485 



3 



Tamarac River . . 



do 



Grand Forks to 



Drayton. 

 Halloek 







4 



Small streams . . . 







4 



Two Rivers 



Do 



4 



634 



4 

 4 



Small streams . . . 



Drayton to Emer- 

 son, Manitoba. 







4 



Pembina River. . 



12 



2,500 



1.5 



Do 





1.5 



Red River 



Internat ional 

 boundary. 



8 



20, 121 



1.7 



PRECIPITATION. 



As it was found that precipitation records covered longer periods 

 of time and were available for many more localities than were 

 stream-flow records, a study of precipitation was undertaken for the 

 purpose of supplementing the data on run-off. 



The official records of the United States Weather Bureau were used 

 as the basis for the precipitation studies. The investigation devel- 

 oped that total annual, total and maximum monthly, and maximum 

 and excessive daily and storm precipitation, are of much greater 

 significance in the project than are mean or average quantities and 

 rates. It developed also that accumulations of precipitation in the 

 forms of snow and ice are important factors in estimating stream 

 discharge for March and April. 



Records of monthly and annual precipitation at Breckenridge, 

 Minn., and Pembina, N. Dak., are available for 48 years (1872 to 

 1919) and at Moorhead, Minn., for 39 years (1881 to 1919). Other 

 weather-observation stations have been established from time to time 



