2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
6/05/2017 | 12:00 PM - 12:15 PM | COMPONENTS OF URBANIZATION AND URBAN PROXIMITY IDENTIFY THREATS TO STREAM WATER QUALITY | 302A
COMPONENTS OF URBANIZATION AND URBAN PROXIMITY IDENTIFY THREATS TO STREAM WATER QUALITY
The urban stream syndrome predicts stressors and associated biological responses common in urban streams. However, variation in stressor intensity may be attributed to urban proximity to streams and urban components (e.g. residential, commercial). We measured water quality at low and high flow in 10 Arkansas streams representing an urban gradient. Land use proximity was quantified at catchment and buffer scales. Multiple linear regression and Akaike’s Information Criterion identified factors that explained variation in nutrients and sediment across catchments. First, we predicted greater nutrient and sediment concentrations with increasing urbanization in buffers. Nutrients and sediments did increase with greater urbanization, but hydrology determined the influence of proximity. For example, catchment-scale urbanization explained variation in nutrients at storm flow, while buffer-scale urbanization explained variation in nutrients at low flow. Second, we predicted as the most-rapidly expanding land use, residential development, would explain greater variation in nutrients and sediment. As predicted, residential development explained greater variation of most stressors at high and low flow. Our results suggest hydrology, land use proximity, and urban components interact to govern water quality in a recently-urbanized watershed.
- C08 Urban Ecology
- C27 Landuse and Non-Point source Impacts
- S02 Urban streams, aquatic ecology, and stormwater engineering: How do we encourage integration, opportunities and collaboration in an era of green infrastructure innovation?
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Presenters/Authors
Stephanie Stoughton
(), University of Central Arkansas, stoughton54@gmail.com;
ASHA DISCLOSURE:
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Sally Entrekin
(), Virginia Tech, sallye@vt.edu;
ASHA DISCLOSURE:
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