LAND DRAINAGE BY MEAN'S OP PUMPS. 



29 



Table 7. — Monthly rainfall and run-off, Louisa-Des Moines Drainage District No. 4- 



Month. 



January . 

 February 



March 



April 



May 



June 



July 



Rain- Run- 

 fall, off. 



Inches. 

 0.59 

 1.24 

 2.32 

 2.73 

 3.49 

 1.19 

 2.98 



Inches. 

 0.00 



.00 

 1.27 

 6.48 

 3.71 

 2.07 



.40 



1913 



Rain- 

 fall. 



Inches. 

 1.55 

 2.06 

 3.03 

 2.55 

 5.35 

 3.91 

 .00 



Run- 

 off. 



Inches. 

 ( l ) 

 ( l ) 

 2.01 

 4.05 

 2.58 

 2.53 

 .95 



Month. 



August 



September. 

 October. .. 

 November. 

 December.. 



Total 



Rain- 

 fall. 



Inches. 

 1.99 

 1.86 

 5.10 

 .99 

 1.19 



25.67 



Run- 

 off. 



Inches. 

 0.56 

 .67 

 C 1 ) 

 C 1 ) 

 (») 



15.16 



1913 



Rain- 

 fall. 



Inches. 



3.29 



1.92 



2.92 



.97 



.61 



28.16 



Run- 

 off. 



Inches. 

 C 1 ) 

 0) 

 0) 

 C 1 ) 

 C 1 ) 



12.12 



1 Drainage obtained by use of sluice gates. 



Tables 8, 9, and 10 show the monthly and yearly rainfall at Musca- 

 tine, Peoria, and St. Louis. These are chosen, as they are located at 

 the corners of a triangle which includes nearly all the area in which 

 pumping is required. 



Table 8. — Monthly precipitation, in inches, Muscatine, Iowa. 



Year. 



Jan. 



Feb. 



Mar. 



Apr. 



May. 



June. 



July. 



Aug. 



Sept. 



Oct. 



Nov. 



Dee. 



Annual 



1846.... 



2.80 



4.50 



2.10 



5.40 



3.40 



4.20 



1.30 



0.50 



5.50 



1.30 



1.80 



1.75 



34.55 



1847.... 



.79 



1.11 



2.94 



3.30 



3.50 



4.60 



1.20 



3.30 



2.10 



1.21 



3.45 



1.00 



28.50 



1848 



1.20 



1.61 



2.31 



.70 



3.40 



2.50 



5.70 



9.10 



3.00 



4.30 



1.85 



3.95 



39.62 



1849 



3.15 



1.03 



2.51 



4.70 



4.70 



12.20 



1.40 



12.20 



5.00 



4.80 



6.60 



.87 



59.16 



1850 



4.62 



.80 



2.08 



3.32 



3.70 



3.50 



5.00 



13.00 



3.90 



2.70 



3.59 



2.87 



49.08 



1851 



1.55 



5.34 



3.03 



3.60 



12.60 



14.30 



8.60 



14.00 



3.50 



1.40 



3.63 



2.95 



74.50 



1852 



2.52 



1.00 



8.60 



5.30 



6.50 



2.20 



3.70 



2.80 



8.30 



7.60 



5.76 



5.11 



59.39 



1853 



.40 



.90 



.90 



11.80 



4.60 



6.40 



6.60 



1.70 



6.20 



.20 



4.90 



.32 



44.92 



1854 



.40 



1.80 



1.23 



1.76 



6.21 



.66 



2.22 



3.33 



1.13 



4.22 



.19 



.51 



23.66 



1855 



3.25 



.71 



1.87 



2.55 



1.94 



4.75 



2.35 



3.51 



1.84 



2.81 



2.23 



3.32 



31.13 



1856 



1.22 



5.54 



.61 



3.44 



4.39 



2.68 



2.74 



1.36 



2.45 



5.21 



4.35 



7.95 



41.94 



1857.... 



.61 



5.80 



3.34 



1.90 



2.75 



.90 



4.67 



6.60 



1.88 



1.95 



2.92 



1.53 



34.85 



1858 



1.60 



3.80 



2.20 



5.87 



8.40 



6.67 



7.30 



4.12 



6.10 



4.95 



4.54 



2.90 



58.45 



1859 



.44 



3.89 



5.01 



3.70 



7.49 



5.82 



2.93 



1.70 



1.80 



.85 



1.33 



1.00 



35.96 



1860 



1.17 



.43 



.55 



1.67 



1.42 



3.66 



4.03 



2.30 



2.76 



1.00 



2.09 



4.02 



25.10 



1861 



1.50 



2.87 



4.50 



3.93 



3.06 



1.72 



2.65 



2.80 



9.30 



7.20 



2.60 



2.10 



44.23 



1862 



4.00 



2.50 



9.20 



7.00 



2.65 



6.74 



3.45 



7.25 



4.50 



2.85 



1.32 



1.70 



53.16 



1863 



1.70 



1.50 



2.00 



1.52 



1.89 



.91 



.25 



4.15 



2.41 



3.54 



1.44 



5.52 



26.83 



1864 



1.05 



.25 



2.59 



3.43 



3.39 



5.75 



3.25 



2.31 



3.20 



3.11 



2.59 



1.85 



32.77 



1865 



.46 



2.90 



2.76 



6.02 



1.05 



3.69 



4.50 



4.25 



4.23 



3.53 



.20 



.62 



34.21 



1866 



3.38 



.58 



1.94 



3.91 



1.18 



2.82 



5.18 



3.36 



4.71 



1.94 



1.01 



2.85 



32.86 



1867 



.75 



3.62 



1.93 



2.34 



5.77 



4.70 



3.24 



1.65 



3.44 



1.00 



2.85 



.95 



32.24 



1868 



.30 



.95 



5.55 



7.43 



7.07 



2.50 



4.59 



2.85 



5.18 



.94 



2.71 



.84 



40.91 



1809 



1.62 



1.63 



1.53 



2.64 



4.47 



9.15 



8.55 



5.35 



1.95 



1.59 



2.47 



2.41 



43.30 



1870 



2.04 



.18 



3.37 



.38 



1.86 



.93 



1.05 



4.46 



4.59 



3.95 



.87 



.93 



24.61 



1871 



2.15 



2.09 



1.88 



1.95 



1.93 



6.71 



3.28 



6.12 



1.07 



3.73 



2.30 



2.90 



36.11 



1X72.... 



.06 



i . 30 



2.55 



3.92 



7.57 



5.17 



2.97 



5.84 



4.15 



.84 



1.30 



.74 



35.41 



1873 



8.49 



.35 



1.90 



1.45 



4.31 



1.91 



2.61 





1.30 



1.44 



1.18 



3.49 



28.43 



1874.... 



4.72 



2.88 



2. 39 



2.93 



1.51 



3.70 



2.26 



3.54 



6.58 



.90 



2.49 



.88 



34.78 



1X75 



.65 



1.50 



1.99 



.90 



2.65 



4.97 



6.72 



2.56 



9.38 



1.27 



.63 



4.37 



37.59 



1X70.... 



3.23 



2.85 



3.54 



4.00 



7.38 



4.45 



9.15 



5.72 



6.53 



1.84 



3.48 



1.40 



53. 57 



1877 



1.58 



2.00 



4.28 



3.57 



2.25 



7.44 



4.82 



4.49 



1.25 



6.03 



3.06 



3.01 



43.78 



1878.... 



.40 



1.56 



2.87 



2.36 



7.49 



4.09 



3.57 



7.43 



2.81 



4.35 



.77 



1.60 



39.30 



1X79.... 



1.20 



1.07 



2.18 



1.81 



4.54 



3.78 



3.40 



4.56 



2.37 



2.85 



4.65 



1.42 



33.83 



1880.... 



3.02 



1.03 



-.',. 02 



3.02 



3.25 



7.22 



3.84 



4.48 



3.17 



.25 



.97 



1.31 



35.78 



1881.... 



1.34 



3. \'i 



2. 58 



2.11 



2.43 



10.38 



3.77 



1.36 



6.59 



7.03 



2.83 



1.75 



45.66 



1882.... 



.81 



1.10 



2.98 



4.00 



8.36 



8.25 



4.55 



1.75 



1.38 



4.29 



7.15 



2.02 



46.67 



1883.... 



1.66 



4.67 



.75 



5.00 



6.19 



4.77 



4.31 



1.45 



1.19 



6.23 



3.45 



1.45 



41.12 



1884.... 



l . 05 



1 . 10 



4.28 



2. 08 



5. 57 



4.03 



3.63 



5.77 



5.23 



6.46 



1.57 



4.42 



45.49 



1885.... 



2. .'58 



2.21 



1 . 25 



' 4.00 



4.18 



4.81 



5.03 



7.38 



2.88 



2.80 



.83 



2.32 



39. 07 



1886.... 



4.21 



1.43 



4.10 



2.02 



5. 05 



i 1.30 



.32 



2.62 



3.05 



4.70 



.95 



.71 



31.12 



1887.... 



1.88 



4.12 



1.11 



1.20 



2.20 



2.10 



2.90 



2.40 



3.49 



2.24 



.98 



3.53 



28.30 



1888.... 



1.49 



.70 



:;. lo 



> 1 . 00 



0.78 



3.82 



3.39 



7.24 



2.00 



1 . 50 



4.43 



2.84 



38. 89 





i a 



1.38 



. 05 



4.28 



4.17 



5. OX 



6.69 



1.15 



3.95 



1.01 



1.05 



1.40 



33. 17 





1.90 



1.70 



:;. 20 



1.12 



3.01 



6. 08 



1 . 88 



2. 35 



2. 52 



4.24 



1 . 38 



1.20 



31.87 



1891.... 



1.7.', 



2.19 



:;. r,o 



' :',. 10 



2.51 



4.87 



3. 29 



5.20 



1.35 



1.49 



' 3. 50 



2.51 



35. 26 





1 . 35 



1.08 



-; 90 



4.31 



10. 32 



8. x:j 



3. 85 



1.70 



.47 



.82 



2.21 



2. 56 



42.30 



]-'>:;.... 



1 35 



1.60 



::. 19 



5. ■■',:', 



2. 35 



3.61 



2. 59 



1.02 



5.05 



1.14 



2.40 



1.27 



31.20 





1.80 



I 25 



2. 11 



: 



2. 05 



2.01 



.24 



2.74 



5. 85 



2.10 



2.99 



.76 



29. 59 





l . 83 



.81 



1 . 75 



.83 



::. o:, 



.98 



7.82 



4.22 



2.12 



1.02 



2.12 



2.62 



29. 20 



1 



\ 10 



1.18 



1 . 32 



5. 72 



5. 21 



2. 02 



5.59 



I. 13 



3.03 



1.89 



1.(1!) 



1.27 



31. 15 



18-17.... 



6. io 



2.72 



2.80 



5. 23 



1 . .7) 



2.51 



3.51 



1.21 



■A. 50 



.78 



2.07 



1.94 



32.35 



l-.'j v.- 



3.33 



1.72 



3.64 



3. 71 



5. 30 



3.34 



.7:; 



6.22 



2. 34 



3.74 



1.76 



.51 



30. 37 



1 Viilui- ; bikcn from surrounding :;l;il ion-. 



