. Bulletin. Natural history; Natural history. 336 Illinois Natural History Survey Bulletin Vol. 31, Art. 8 test of whether pollution abatement programs in the Illinois Valley have re- sulted in impro\ement of water quality for fish will occur during low discharge periods in the years to come. One of the major impacts on the lUinois River below Hennepin was the leveeing and draining of bottom- land areas, primarily in the period 1903-1926. Of 400,000 bottomland acres (161,874 ha) subject to overflow by the river, approximately 200,000 NO. OF LARGEMOUTH BASS TAKEN PER 30 MIN OF ELECTROFISHING JU
. Bulletin. Natural history; Natural history. 336 Illinois Natural History Survey Bulletin Vol. 31, Art. 8 test of whether pollution abatement programs in the Illinois Valley have re- sulted in impro\ement of water quality for fish will occur during low discharge periods in the years to come. One of the major impacts on the lUinois River below Hennepin was the leveeing and draining of bottom- land areas, primarily in the period 1903-1926. Of 400,000 bottomland acres (161,874 ha) subject to overflow by the river, approximately 200,000 NO. OF LARGEMOUTH BASS TAKEN PER 30 MIN OF ELECTROFISHING JULY-AUGUST DISCHARGE AT KINGSTON MINES (m^/sEC) ? ?. dissolved oxygen levels (% saturation) I I I I oo<Z)rsj-tcnoocD^oJ="cn JULY-AUGUST WATER LEVELS AT HAVANA (m). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
