Soil hydraulic parameters estimated from satellite information through data assimilation
نویسندگان
چکیده
منابع مشابه
Information Content of Data for Identifying Soil Hydraulic Parameters from Outflow Experiments
However, using this conventional approach, problems are often encountered with the non-uniqueness of the Process-oriented models of open systems often contain parameters optimized parameters. Non-uniqueness leads to more that cannot be measured directly but can only be obtained by inverse modeling. A conventional inverse method is typically based on the than one set of parameters, each yielding...
متن کاملData Assimilation to Extract Soil Moisture Information from SMAP Observations
This study compares different methods to extract soil moisture information through the assimilation of Soil Moisture Active Passive (SMAP) observations. Neural network (NN) and physically-based SMAP soil moisture retrievals were assimilated into the National Aeronautics and Space Administration (NASA) Catchment model over the contiguous United States for April 2015 to March 2017. By constructio...
متن کاملGlobal Soil Moisture from Satellite Observations, Land Surface Models, and Ground Data: Implications for Data Assimilation
Three independent surface soil moisture datasets for the period 1979–87 are compared: 1) global retrievals from the Scanning Multichannel Microwave Radiometer (SMMR), 2) global soil moisture derived from observed meteorological forcing using the NASA Catchment Land Surface Model, and 3) ground-based measurements in Eurasia and North America from the Global Soil Moisture Data Bank. Time-average ...
متن کاملDevelopment of Dynamic Ground Water Data Assimilation for Quantifying Soil Hydraulic Properties from Remotely Sensed Soil Moisture
Several inversion modeling-based approaches have been developed/used to extract soil hydraulic properties (α, n, θres, θsat, Ksat) from remotely sensed (RS) soil moisture footprints. Hydrological models with shallow ground water (SGW) table depths in soils simulate daily root zone soil moisture dynamics based on the extracted soil parameters. The presence of SGW table depths in soils significan...
متن کاملOn the Identification of Soil Hydraulic Parameters
Drainage experiments are commonly conducted to determine soil hydraulic parameters. Experiments generally measure the temporal evolution of the cumulative outflow as well as pressure heads and water contents at several levels in the column. Then the analysts try to calibrate the model by fitting the model response to the data series. The aim of the present work is to investigate the quality of ...
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ژورنال
عنوان ژورنال: International Journal of Remote Sensing
سال: 2011
ISSN: 0143-1161,1366-5901
DOI: 10.1080/01431161.2010.532170