DOI: 10.5194/hess-18-1199-2014
Scopus记录号: 2-s2.0-84897449609
论文题名: A physically based approach for the estimation of root-zone soil moisture from surface measurements
作者: Manfreda S ; , Brocca L ; , Moramarco T ; , Melone F ; , Sheffield J
刊名: Hydrology and Earth System Sciences
ISSN: 10275606
出版年: 2014
卷: 18, 期: 3 起始页码: 1199
结束页码: 1212
语种: 英语
Scopus关键词: Surface measurement
; Multi-disciplinary analysis
; Physical characteristics
; Physical interpretation
; Satellite remote sensing
; Semi-arid environments
; Soil moisture dynamics
; Soil moisture measurement
; Surface soil moisture
; Soil moisture
; remote sensing
; rhizosphere
; satellite data
; semiarid region
; soil moisture
; water budget
; Benin [West Africa]
; Mali
; New Mexico
; Niger [West Africa]
; United States
英文摘要: In the present work, we developed a new formulation for the estimation of the soil moisture in the root zone based on the measured value of soil moisture at the surface. It was derived from a simplified soil water balance equation for semiarid environments that provides a closed form of the relationship between the root zone and the surface soil moisture with a limited number of physically consistent parameters. The method sheds lights on the mentioned relationship with possible applications in the use of satellite remote sensing retrievals of soil moisture. The proposed approach was used on soil moisture measurements taken from the African Monsoon Multidisciplinary Analysis (AMMA) and the Soil Climate Analysis Network (SCAN) databases. The AMMA network was designed with the aim to monitor three so-called mesoscale sites (super sites) located in Benin, Mali, and Niger using point measurements at different locations. Thereafter the new formulation was tested on three additional stations of SCAN in the state of New Mexico (US). Both databases are ideal for the application of such method, because they provide a good description of the soil moisture dynamics at the surface and the root zone using probes installed at different depths. The model was first applied with parameters assigned based on the physical characteristics of several sites. These results highlighted the potential of the methodology, providing a good description of the root-zone soil moisture. In the second part of the paper, the model performances were compared with those of the well-known exponential filter. Results show that this new approach provides good performances after calibration with a set of parameters consistent with the physical characteristics of the investigated areas. The limited number of parameters and their physical interpretation makes the procedure appealing for further applications to other regions. © Author(s) 2014. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/78287
Appears in Collections: 气候变化事实与影响
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作者单位: School of Engineering, University of Basilicata, Potenza, Italy; Research Institute for Geo-Hydrological Protection (IRPI), National Research Council, Perugia, Italy; Department of Civil and Environmental Engineering, Princeton University, Princeton, NJ, United States
Recommended Citation:
Manfreda S,, Brocca L,, Moramarco T,et al. A physically based approach for the estimation of root-zone soil moisture from surface measurements[J]. Hydrology and Earth System Sciences,2014-01-01,18(3)