Record Display for the EPA National Library Catalog
RECORD NUMBER: 24 OF 29| Main Title | Relationships between drainage area characteristics and nonpoint source nutrients in streams : a preliminary analysis of National Eutrophication Survey data from 143 drainage areas in northeastern and northcentral United States / | |||||||||||
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| CORP Author | Pacific Northwest Environmental Research Lab., Corvallis, Oreg.;National Environmental Research Center, Las Vegas, Nev. | |||||||||||
| Publisher | Pacific Northwest Environmental Research Laboratory, | |||||||||||
| Year Published | 1974 | |||||||||||
| Report Number | Working Paper-25 | |||||||||||
| Stock Number | PB-240 619 | |||||||||||
| Subjects | Eutrophication--United States ; Lakes--United States ; Water quality--United States | |||||||||||
| Additional Subjects | Watersheds ; Land use ; Water pollution ; Surveys ; Inorganic phosphates ; Inorganic nitrates ; Stream flow ; Drainage ; Correlation techniques ; Livestock ; Farms ; Surface water runoff ; Urban areas ; Forest land ; North central region(United States) ; Northeast region(United States) ; Eutrophication | |||||||||||
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| Collation | ii, 50 pages ; 29 cm. | |||||||||||
| Abstract | National Eutrophication Survey data for 143 drainage areas in the north-central and northeastern United States affected only by non-point sources were studied to determine relationships between general land use and stream nutrients. Both total nitrogen and total phosphorus concentrations and loads in streams were considered. Mean annual nutrient concentrations were significantly higher in streams draining agricultural lands than in those draining forested watersheds and these differences were greater for total phosphorus (0.151 as compared to 0.014 mg/l) than for total nitrogen (3.10 as compared to 0.77 mg/l). Animal density had a significant effect on both nitrogen and phosphorus concentrations in streams. Little correlation was found between stream nutrient loads and overall land use. |
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| Notes | Includes tables and graphs. Includes bibliographical references (pages 49-50). Microfiche. |