Identifying feasible nonpoint source pollutant sampling intervals for watersheds with paddy field and urban land uses
| Autor: | Adel Shirmohammadi, Hyunkyu Park, Younggu Her, Minhyuk Jeung, Kwang-Sik Yoon, Jina Beom, Woo-Jung Choi |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
TC401-506
Pollutant Water supply for domestic and industrial purposes 010504 meteorology & atmospheric sciences water quality monitoring Sampling (statistics) 010501 environmental sciences Urban land 01 natural sciences storm event sampling frequency sampling interval River lake and water-supply engineering (General) Environmental science Paddy field nonpoint source pollution load estimation Water resource management TD201-500 Nonpoint source pollution 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Water Supply, Vol 21, Iss 2, Pp 780-790 (2021) |
| ISSN: | 1607-0798 1606-9749 |
| DOI: | 10.2166/ws.2020.296 |
| Popis: | Monitoring provides data and information necessary for water quality assessment, but often it is prohibitive, especially when frequent sampling is required. In this study, we explored feasible sampling intervals for improved efficiency of nonpoint source (NPS) pollution assessment. We compared NPS pollutant loads calculated with concentration samples collected at 1, 2, 3, 4, and 6-hour intervals for the first 24 hours of 13 storm events and investigated the effect of different sampling intervals on load estimation for three watersheds that have different land uses. When compared to load estimates made from concentrations sampled at the reference (1-hour) interval, differences in load estimates were less than 10% in the cases of the 2-hour and 3-hour intervals in the urbanized and agricultural watersheds, respectively, except in the case of suspended solids (SS). When it comes to the total load estimation, up to 3-hour interval sampling provided load estimates with acceptable accuracy, except for SS. Thus, the 3-hour sampling interval was considered feasible for long-term pollutant load assessment, while the 2-hour sampling interval was suggested for SS. Such findings are expected to facilitate NPS pollution assessment by providing information required to improve monitoring efficiency. HIGHLIGHTS The efficiency and accuracy of different water sampling intervals were assessed for improved feasibility of nonpoint source pollutant monitoring.; The sampling intervals of equal to or less than 3 hours could provide accurate and efficient pollutant load estimates in agricultural areas.; Urbanized areas required relatively frequent water sampling to satisfy the required accuracy. |
| Databáze: | OpenAIRE |
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