Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR020557 |
Predicting organic matter, nitrogen, and phosphorus concentrations in runoff from peat extraction sites using partial least squares regression | |
Tuukkanen, T.; Marttila, H.; Klove, B. | |
2017-07-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:7 |
文章类型 | Article |
语种 | 英语 |
国家 | Finland |
英文摘要 | Organic matter and nutrient export from drained peatlands is affected by complex hydrological and biogeochemical interactions. Here partial least squares regression (PLSR) was used to relate various soil and catchment characteristics to variations in chemical oxygen demand (COD), total nitrogen (TN), and total phosphorus (TP) concentrations in runoff. Peat core samples and water quality data were collected from 15 peat extraction sites in Finland. PLSR models constructed by cross-validation and variable selection routines predicted 92, 88, and 95% of the variation in mean COD, TN, and TP concentration in runoff, respectively. The results showed that variations in COD were mainly related to net production (temperature and water-extractable dissolved organic carbon (DOC)), hydrology (topographical relief), and solubility of dissolved organic matter (peat sulfur (S) and calcium (Ca) concentrations). Negative correlations for peat S and runoff COD indicated that acidity from oxidation of organic S stored in peat may be an important mechanism suppressing organic matter leaching. Moreover, runoff COD was associated with peat aluminum (Al), P, and sodium (Na) concentrations. Hydrological controls on TN and COD were similar (i.e., related to topography), whereas degree of humification, bulk density, and water-extractable COD and Al provided additional explanations for TN concentration. Variations in runoff TP concentration were attributed to erosion of particulate P, as indicated by a positive correlation with suspended sediment concentration (SSC), and factors associated with metal-humic complexation and P adsorption (peat Al, water-extractable P, and water-extractable iron (Fe)). |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000407895000038 |
WOS关键词 | HUMIC SUBSTANCES ; CATCHMENT CHARACTERISTICS ; ANAEROBIC CONDITIONS ; MICROBIAL ACTIVITY ; SEDIMENT DELIVERY ; CARBON EXPORT ; WATER-QUALITY ; SOIL ; PEATLANDS ; DEPOSITION |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
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/20410 |
专题 | 资源环境科学 |
作者单位 | Univ Oulu, Water Resources & Environm Engn, Oulu, Finland |
推荐引用方式 GB/T 7714 | Tuukkanen, T.,Marttila, H.,Klove, B.. Predicting organic matter, nitrogen, and phosphorus concentrations in runoff from peat extraction sites using partial least squares regression[J]. WATER RESOURCES RESEARCH,2017,53(7). |
APA | Tuukkanen, T.,Marttila, H.,&Klove, B..(2017).Predicting organic matter, nitrogen, and phosphorus concentrations in runoff from peat extraction sites using partial least squares regression.WATER RESOURCES RESEARCH,53(7). |
MLA | Tuukkanen, T.,et al."Predicting organic matter, nitrogen, and phosphorus concentrations in runoff from peat extraction sites using partial least squares regression".WATER RESOURCES RESEARCH 53.7(2017). |
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