Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR028624 |
Hydraulic and physical properties of managed and intact peatlands: Application of the van Genuchten-Mualem models to peat soils | |
Meseret Walle Menberu; Hannu Marttila; Anna-Kaisa Ronkanen; Ali Torabi Haghighi; Bjø; rn Klø; ve | |
2021-06-21 | |
发表期刊 | Water Resources Research |
出版年 | 2021 |
英文摘要 | Undisturbed peatlands are effective carbon sinks and provide a variety of ecosystem services. However, anthropogenic disturbances, especially land drainage, strongly alter peat soil properties and jeopardize the benefits of peatlands. The effects of disturbances should therefore be assessed and predicted. To support accurate modeling, this study determined the physical and hydraulic properties of intact and disturbed peat samples collected from 59 sites (in total 3073 samples) in Finland and Norway. The bulk density (BD), porosity, and specific yield (Sy) values obtained indicated that the top layer (0-30 cm depth) at agricultural and peat extraction sites was most affected by land use change. The BD in the top layer at agricultural, peat extraction, and forestry sites was 441%, 140%, and 92% higher, respectively, than that of intact peatlands. Porosity decreased with increased BD, but not linearly. Agricultural and peat extraction sites had the lowest saturated hydraulic conductivity, Sy, and porosity, and the highest BD of the land use options studied. The van Genuchten-Mualem (vGM) soil water retention curve (SWRC) and hydraulic conductivity (K) models proved to be applicable for the peat soils tested, providing values of SWRC, K, and vGM-parameters (α and n) for peat layers (top, middle and bottom) under different land uses. A decrease in peat soil water content of ≥10% reduced the unsaturated K values by two orders of magnitude. This unique dataset can be used to improve hydrological modeling in peat-dominated catchments and for fuller integration of peat soils into large-scale hydrological models. 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/333703 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Meseret Walle Menberu,Hannu Marttila,Anna-Kaisa Ronkanen,et al. Hydraulic and physical properties of managed and intact peatlands: Application of the van Genuchten-Mualem models to peat soils[J]. Water Resources Research,2021. |
APA | Meseret Walle Menberu.,Hannu Marttila.,Anna-Kaisa Ronkanen.,Ali Torabi Haghighi.,Bjø.,...&ve.(2021).Hydraulic and physical properties of managed and intact peatlands: Application of the van Genuchten-Mualem models to peat soils.Water Resources Research. |
MLA | Meseret Walle Menberu,et al."Hydraulic and physical properties of managed and intact peatlands: Application of the van Genuchten-Mualem models to peat soils".Water Resources Research (2021). |
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