Byers Emily Nottingham, Messer Tiffany L, Unrine Jason, Barton Christopher, Agouridis Carmen, Miller Daniel N
Department of Biosystems and Agricultural Engineering, University of Kentucky, 128 CE Barnhart, Lexington, KY 40506, USA.
Department of Biosystems and Agricultural Engineering, University of Kentucky, 128 CE Barnhart, Lexington, KY 40506, USA.
Sci Total Environ. 2025 Jan 1;958:177837. doi: 10.1016/j.scitotenv.2024.177837. Epub 2024 Dec 4.
Surface water contaminants, including both conventional contaminants (e.g., nutrients, trace elements) and emerging contaminants (e.g., pesticides, pharmaceuticals) are heavily influenced by urban and rural land use practices. The goal of the study was to characterize the influence of watershed land use practices on surface water quality. Specific objectives were to (1) identify and quantify the type and concentration of nutrients, trace elements, pesticides, pharmaceuticals and personal care products in four watersheds and (2) understand potential sources of contamination based on the watershed's land cover and land use characteristics (i.e., oil and gas, urban, mining, agriculture). Monthly polar organic chemical integrative samples and water grab samples were collected from March-October 2022. The results showed that surface water quality varied by location, season, and flood condition Specifically, aluminum (mean = 758 μg L) and iron (mean = 1130 μg L) exceeded chronic aquatic life water quality criteria in the agricultural watershed, while imidacloprid exceeded the chronic criteria limit for freshwater invertebrates in both the urban (mean = 5.96 ng L) and agricultural (mean = 4.72 ng L) watersheds. Sulfate concentrations (mean = 666 mg L) also exceeded ambient water quality criteria in the watershed with a high activity of mining. This study provides important steps for developing a comprehensive understanding of land use impacts on contaminant presence and concentration in surface waters, improved understanding of the implications to non-target species, and necessary water treatment processes to ensure a safe water supply.
地表水污染物，包括传统污染物（如营养物质、微量元素）和新兴污染物（如农药、药物），受到城乡土地利用方式的严重影响。该研究的目的是描述流域土地利用方式对地表水水质的影响。具体目标是：（1）确定并量化四个流域中营养物质、微量元素、农药、药物和个人护理产品的类型和浓度；（2）根据流域的土地覆盖和土地利用特征（即石油和天然气、城市、采矿、农业）了解潜在的污染来源。于2022年3月至10月每月采集极地有机化学综合样品和水样。结果表明，地表水水质因地点、季节和洪水情况而异。具体而言，农业流域中的铝（平均 = 758 μg/L）和铁（平均 = 1130 μg/L）超过了慢性水生生物水质标准，而吡虫啉在城市（平均 = 5.96 ng/L）和农业（平均 = 4.72 ng/L）流域中均超过了淡水无脊椎动物的慢性标准限值。在采矿活动活跃的流域中，硫酸盐浓度（平均 = 666 mg/L）也超过了环境水质标准。本研究为全面了解土地利用对地表水中污染物存在和浓度的影响、更好地理解对非目标物种的影响以及确保安全供水所需的水处理工艺提供了重要步骤。
