Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2021WR030747 |
Estimation of evapotranspiration rates and root water uptake profiles from soil moisture sensor array data | |
Weiyu Li; Haruko M. Wainwright; Qina Yan; Haiyan Zhou; Baptiste Dafflon; Yuxin Wu; Roelof Versteeg; Daniel M. Tartakovsky | |
2021-11-06 | |
发表期刊 | Water Resources Research |
出版年 | 2021 |
英文摘要 | Evapotranspiration is arguably the least quantified component of the hydrologic cycle. We propose two complementary strategies for estimation of evapotranspiration rates and root water uptake profiles from soil-moisture sensor-array data. One is our implementation of ensemble Kalman filter (EnKF); it treats the evapotranspiration sink term in the Richards equation, rather than soil moisture, as the observable to update. The other is a maximum likelihood estimator (MLE) applied to the same observable; it is supplemented with the Fisher information matrix to quantify uncertainty in its predictions. We use numerical experiments to demonstrate the accuracy and computational efficiency of these techniques. We found our EnKF implementation to be two orders of magnitude faster than either the standard EnKF or MLE, and our MLE procedure to require an order of magnitude fewer iterations to converge than its counterpart applied to soil moisture. These findings render our methodologies a viable and practical tool for estimation of the root water uptake profiles and evaporation rates, with the MLE technique to be used when the prior knowledge about evapotranspiration at the site is elusive. 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/341077 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Weiyu Li,Haruko M. Wainwright,Qina Yan,et al. Estimation of evapotranspiration rates and root water uptake profiles from soil moisture sensor array data[J]. Water Resources Research,2021. |
APA | Weiyu Li.,Haruko M. Wainwright.,Qina Yan.,Haiyan Zhou.,Baptiste Dafflon.,...&Daniel M. Tartakovsky.(2021).Estimation of evapotranspiration rates and root water uptake profiles from soil moisture sensor array data.Water Resources Research. |
MLA | Weiyu Li,et al."Estimation of evapotranspiration rates and root water uptake profiles from soil moisture sensor array data".Water Resources Research (2021). |
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