J, Z. Greenleaf—The Hydrology of the Mississippi. 41 



Low. — The low water of Fall occurs in August to Nov. — usually lowest in end 

 of Sept. to mid. Oct. Lowest water of year in end of Nov. to end of Dec, 

 due largely to freezing of the ground. 

 lUinnesota. — Practically the same in period of rise and fall as the Mississippi 

 above it, but much more fluctuating in amount, because of the comparatively 

 few lakes and swamps, and more open prairie on its watershed. 

 Upper Mississippi (clown to Missoari Kiver). High. — Rise begins in Feb., due to 

 rains and melting snow. A good stage maintained well into July. Usually 

 two occasions of especially high water. The smaller may occur any time 

 from latter part of Feb. to end of March, due to rains and melting snow. 

 The greater may occur any time from April to July, due to rains and some- 

 what to melting snow. There is often a brief Fall freshet. 



Lovj. — The lowest water of the Fall occurs in Aug. to Oct., generally in Oct. 

 The lowest of the year is in Dec , due largely to freezing of the ground. 

 Missonri. High. — The volume of flow increases from early in Feb. on. reaching a 

 max. in April, due to rains and melting snow. Owing to the large differ- 

 ences of elevation on the watershed, meltmg snow influences the stage of the 

 river until Aug. A fall occurs in May, as the bulk of the snow disappears. 

 Then there is a rise m June to the max. for the year, falling in July and Aug. 



Low. — The river runs low in Sept., Oct. and Nov., and in the latter part of Nov. 

 into Dec. occurs a sudden drop to the lowest stage of the year, due to freez- 

 ing of the ground. 

 Ohio. High. — The river usually begins to rise in the latter part of January and 

 is liable to maintain a fair stage until into July. In latter part of Feb. on, 

 into the latter part of March, occurs the max. rise of the year, due to winter 

 and spring rains and melting snow. Again, in April to middle of May is the 

 height of a secondary rise, due to rains solely. The Fall rains cause an occa- 

 sional rise in Nov. 



Low. — The low water is in August through to Jan., and the lowest is any time 

 from the first of Oct. to the middle of Nov. 

 Saint Francis. High — The river rises to a good stage in the middle to end of 

 Jan., diminishing through May. The highest stage usually occurs in the 

 latter part of March. 



Low. — Low water runs through Sept. to Dec, usually reaching the lowest point 

 in the end of Oct. to the end of Nov. 

 Wliite. High. — There is usually a good stage from Jan. to June, a fall sometimes 

 intervening. The highest water may occur any time between those limits, 

 with the chances in favor of its coming in May. 



Low. — Low water occurs from July into Dec, and the lowest stage of the year 

 from Sept. to Nov., especially in Nov. 

 Arkansas. High. — A good stage of water is liable from Jan. to June. A max. 

 occurs in Feb., and again in April or May, and the chances are about even 

 in the long run for either of these being the max. for the year. There is 

 often a brief freshet in the Fall. 



Loio. — The river falls in July, and, except for Fall freshet, runs low into Dec 

 Lowest stage of the year is liable from end of Sept. to middle of Nov. 

 Tazoo. High. — There is a good stage of water from Jan. to June or July, cul- 

 minating usually in April. An irregular and occasional rise occurs any time 

 from Aug. to Dec. 



Low. — The river runs low as a rule from July through Dec, reaching a mini- 

 mum in the latter part of Oct. to the end of Nov. 

 Red, High. — The river rises in Jan. and holds a fair stage until into June. The 

 highest water of the year may occur any time from Feb. to May, and probably 

 in April to May. There is an occasional short rise in late Summer or Fall. 



Low. — The river falls in July and runs low as a rule until in Dec. The lowest 

 water for the year may occur in Sept , Oct. or Nov. 

 The Main River. High. — The river begins to rise early in January, and attains a 

 max. stage usually in latter part of April or May, falling in June, July and 

 August. 



Loio — The low water occurs from Sept. on to the end of the year, reaching the 

 lowest point, as a rule, in Nov. 



