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| Web URL(s): | https://dl.sciencesocieties.org/publications/jeq/pdfs/25/2/JEQ0250020325
Last checked: 12/14/2016
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| Publication Type:
| Refereed |
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| Author(s): | Field, Cathryn K.;
Siver, Peter, A.;
Lott, Anne-Marie |
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| Author Affiliation: | Botany Department, Connecticut College, 270 Mohegan Ave., New London, CT 06320 |
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| Title: | Estimating the effects of changing land use patterns on Connecticut lakes |
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| Section: | Water Quality
Other records with the "Water Quality" Section
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| Source: | Journal of Environmental Quality. Vol. 25, No. 2, March/April 1996, p. 325-333. |
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| Publishing Information: | Madison, Wisconsin: American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America |
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| # of Pages: | 9 |
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| Keywords: | TIC Keywords: Soil water retention; Phosphorus; Nitrogen; Ponds; Water quality; Land use
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| Abstract/Contents: | "Changes in land use of 30 Connecticut lake watersheds between 1934, 1970, and 1990 were quantified using aerial photographs. Results were used with existing land use models to estimate changes in concentrations of total phosphorus (TP) and total nitrogen (TN) over the 56-yr period. On average, the watersheds have increased in urban residential land cover from 2% in 1934 to 16% in 1990, and decreased in agricultural land from 20 to 7% during the same time period. The mean percentage of forested land has remained relatively constant. Based on the land use models of Norvell et al. (1979) and Frink (1991), the mean estimated total phosphorus concentration (eTP) increased from 15μg L-¹ in 1934 to 25 μg L-¹ in 1990. The eTP concentrations increased in 26 of the 30 study lakes. In contrast, the mean estimated concentration of total nitrogen (eTN) increased only 20% from 374 to 450 μg L-¹. Principal component analysis (PCA) was used to score each study lake according to its current trophic and ionic condition using chemical data from 1991 to 1993, and the results regressed against the 1990 land use types. Trophic scores were most highly correlated with forest cover, while ionic scores were most highly correlated with forest cover and the degree of urban-residential land cover. The effect of water retention time is dicussed. Land use models provide useful tools in the management of lakes." |
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| Language: | English |
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| References: | 43 |
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| Note: | Figures
Tables
Graphs |
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| ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Field, C. K., P. A. Siver, and A.-M. Lott. 1996. Estimating the effects of changing land use patterns on Connecticut lakes. J. Environ. Qual. 25(2):p. 325-333. |
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| Web URL(s):
https://dl.sciencesocieties.org/publications/jeq/pdfs/25/2/JEQ0250020325
Last checked: 12/14/2016
Requires: PDF Reader
Notes: Item is within a limited-access website |
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MSU catalog number: S 900 .J6 |
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