Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR027726 |
Models for Predicting Water Retention in Pyrogenic Carbon (Biochar) and Biochar‐Amended Soil at Low Water Contents | |
Seyyed Ali Akbar Nakhli; Paul T. Imhoff | |
2020-10-17 | |
发表期刊 | Water Resources Research
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出版年 | 2020 |
英文摘要 | The dry end of the soil water retention curve (WRC) plays an important role in various hydrologic, solute transport, plant, and microbial processes. Despite increasing application of biochar as a soil amendment, knowledge about water retention in biochars and biochar‐amended soils under dry conditions is lacking. Mechanistic models are presented to predict the WRC for biochars and biochar‐amended soils at matric potential (ψ) < ~−1 MPa. For biochars, the amount of water retained is linked to biochar surficial oxygen content and pore volume and surface area distributions. The WRC for soils at dry conditions is predicted using specific surface area. The WRC model for biochar‐amended soils is the sum of the contributions of models for biochar and soil. The model’s utility was examined for three natural soils and a uniform sand, a wood‐based biochar, and ten different combinations of these soils and biochar. The accuracy of the model for biochars was further tested for six other pyrogenic carbonaceous materials (PCMs). The models agreed well with experimental data: for the biochar and PCMs, soils, and biochar‐amended soils the root mean square error normalized to the range of water content was almost always < 10%. The line of best fit for predicted versus measured gravimetric water content at permanent wilting point had slope of 0.935 ± 0.013 and a coefficient of determination of 0.997. The applicability of these models for different biochars, soils, and their mixtures is discussed. |
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/299235 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Seyyed Ali Akbar Nakhli,Paul T. Imhoff. Models for Predicting Water Retention in Pyrogenic Carbon (Biochar) and Biochar‐Amended Soil at Low Water Contents[J]. Water Resources Research,2020. |
APA | Seyyed Ali Akbar Nakhli,&Paul T. Imhoff.(2020).Models for Predicting Water Retention in Pyrogenic Carbon (Biochar) and Biochar‐Amended Soil at Low Water Contents.Water Resources Research. |
MLA | Seyyed Ali Akbar Nakhli,et al."Models for Predicting Water Retention in Pyrogenic Carbon (Biochar) and Biochar‐Amended Soil at Low Water Contents".Water Resources Research (2020). |
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