Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR029053 |
Spatial Persistence of Water Chemistry Patterns across Flow Conditions in a Mesoscale Agricultural Catchment | |
S. Gu; A. Casquin; R. Dupas; B. W. Abbott; P. Petitjean; P. Durand; G. Gruau | |
2021-07-08 | |
发表期刊 | Water Resources Research
![]() |
出版年 | 2021 |
英文摘要 | Protecting water quality at catchment scales is complicated by the high spatiotemporal variability in water chemistry. Consequently, determining pollutant sources requires costly monitoring strategies to diagnose causes and guide management solutions. However, recent studies have shown that spatial patterns in water chemistry can be persistent at catchment scales, potentially allowing identification of pollution sources and sinks with just a few sampling campaigns. Here, we tested a new method to quantify spatial persistence (SP) of water chemistry patterns with data from synoptic samplings in 22 headwater subcatchments within a 375 km2 catchment in western France (March 2018 - July 2019). This new method to quantify SP reduces dependence on long-term metrics such as flow-weighted concentrations, which are usually uncertain or unavailable. We applied the method to 16 ecologically relevant water quality parameters, including soluble reactive phosphorus, nitrate, and dissolved organic carbon. The results showed an average SP of 0.68 among parameters during the study period. For most parameters, SP was higher during the high-flow winter period but lower and more variable during the low-flow summer period. We found that the SP ultimately depended on the ratio between the temporal and spatial coefficients of variation (variance explained: 70%) rather than the temporal synchrony among subcatchments (variance explained: 4%). These results demonstrate that in these temperate catchments, synoptic sampling during the high-flow winter period allows efficient identification of source and sink subcatchments, while more frequent samplings are needed to characterize ecological conditions at low flow. This article is protected by copyright. All rights reserved. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/333753 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | S. Gu,A. Casquin,R. Dupas,et al. Spatial Persistence of Water Chemistry Patterns across Flow Conditions in a Mesoscale Agricultural Catchment[J]. Water Resources Research,2021. |
APA | S. Gu.,A. Casquin.,R. Dupas.,B. W. Abbott.,P. Petitjean.,...&G. Gruau.(2021).Spatial Persistence of Water Chemistry Patterns across Flow Conditions in a Mesoscale Agricultural Catchment.Water Resources Research. |
MLA | S. Gu,et al."Spatial Persistence of Water Chemistry Patterns across Flow Conditions in a Mesoscale Agricultural Catchment".Water Resources Research (2021). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论