Soil Moisture Modeling and Scaling Using Passive Microwave Remote Sensing - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Soil Moisture Modeling and Scaling Using Passive Microwave Remote Sensing write by Narendra N. Das. This book was released on 2007. Soil Moisture Modeling and Scaling Using Passive Microwave Remote Sensing available in PDF, EPUB and Kindle. Soil moisture in the shallow subsurface is a primary hydrologic state governing land-atmosphere interaction at various scales. The primary objectives of this study are to model soil moisture in the root zone in a distributed manner and determine scaling properties of surface soil moisture using passive microwave remote sensing. The study was divided into two parts. For the first study, a root zone soil moisture assessment tool (SMAT) was developed in the ArcGIS platform by fully integrating a one-dimensional vadose zone hydrology model (HYDRUS-ET) with an ensemble Kalman filter (EnKF) data assimilation capability. The tool was tested with data set from the Southern Great Plain 1997 (SGP97) hydrology remote sensing experiment. Results demonstrated that SMAT displayed a reasonable capability to generate soil moisture distribution at the desired resolution at various depths of the root zone in Little Washita watershed during the SGP97 hydrology remote sensing experiment. To improve the model performance, several outstanding issues need to be addressed in the future by: including "effective" hydraulic parameters across spatial scales; implementing subsurface soil properties data bases using direct and indirect methods; incorporating appropriate hydrologic processes across spatial scales; accounting uncertainties in forcing data; and preserving interactions for spatially correlated pixels. The second study focused on spatial scaling properties of the Polarimetric Scanning Radiometer (PSR)-based remotely sensed surface soil moisture fields in a region with high row crop agriculture. A wavelet based multi-resolution technique was used to decompose the soil moisture fields into larger-scale average soil moisture fields and fluctuations in horizontal, diagonal and vertical directions at various resolutions. The specific objective was to relate soil moisture variability at the scale of the PSR footprint (800 m X 800 m) to larger scale average soil moisture field variability. We alsoinvestigated the scaling characteristics of fluctuation fields among various resolutions. The spatial structure of soil moisture exhibited linearity in the log-log dependency of the variance versus scale-factor, up to a scale factor of -2.6 (6100 m X 6100 m) irrespective of wet and dry conditions, whereas dry fields reflect nonlinear (multi-scaling) behavior at larger scale-factors.
Large Scale Passive Microwave Remote Sensing of Soil Moisture
Large Scale Passive Microwave Remote Sensing of Soil Moisture - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Large Scale Passive Microwave Remote Sensing of Soil Moisture write by Thomas J. Jackson. This book was released on 2001. Large Scale Passive Microwave Remote Sensing of Soil Moisture available in PDF, EPUB and Kindle.
Passive Microwave Remote Sensing of Land--Atmosphere Interactions
Passive Microwave Remote Sensing of Land--Atmosphere Interactions - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Passive Microwave Remote Sensing of Land--Atmosphere Interactions write by Bhaskar J. Choudhury. This book was released on 1995-11. Passive Microwave Remote Sensing of Land--Atmosphere Interactions available in PDF, EPUB and Kindle. Recent advances in theory and observations using passive microwave remote sensing have hightlighted the potential of spaceborne sensors for contributing to the required land surface measurements of soils, vegetation, snow cover and precipitation. Furthermore, the spatial resolution of passive microwave observations matches the special scales of large-scale models of land-atmosphere interactions both for data assimilation and validation. In order to stimulate and focus this research a workshop, sponsored by ESA and NASA, was organized to review the state-of-the-art in microwave radiometry related to land applications and to exchange ideas leading into new directions for future research. This volume contains the refereed papers from the aforementioned ESA/NASA workshop, which are arranged by topic, as well as the (edited) working group reports.
Microwave Remote Sensing of Soil Moisture
Microwave Remote Sensing of Soil Moisture - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Microwave Remote Sensing of Soil Moisture write by Jiangyuan Zeng. This book was released on 2023-11-06. Microwave Remote Sensing of Soil Moisture available in PDF, EPUB and Kindle. This reprint focuses on the most advanced theories, models, algorithms, and products related to microwave remote sensing of soil moisture. Over the past few decades, significant efforts have been made to develop models, retrieval algorithms, downscaling methods, and validation strategies related to microwave remote sensing of soil moisture. Following the turn of the century, a series of microwave-based satellites/sensors have been successfully launched, and satellite soil moisture products have become increasingly abundant, greatly promoting the various applications of satellite soil moisture datasets. Despite numerous studies and achievements in this field, great challenges remain, such as the spatial resolution, retrieval accuracy, and validation strategies related to satellite soil moisture datasets. This reprint covers research progress on the following topics: (1) downscaling passive microwave-based soil moisture products, (2) estimating soil moisture from active microwave observations, (3) presenting some new algorithms (freeze-thaw state detection algorithm) and models (soil dielectric models) related to microwave remote sensing of soil moisture, (4) evaluating microwave-based soil moisture products, and (5) reviewing the state-of-the-art techniques and algorithms used to estimate and improve the quality of soil moisture estimations.
Evaluating and Modeling Surface Soil Moisture Using Multi-frequency Passive Microwave Remote Sensing Data
Evaluating and Modeling Surface Soil Moisture Using Multi-frequency Passive Microwave Remote Sensing Data - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Evaluating and Modeling Surface Soil Moisture Using Multi-frequency Passive Microwave Remote Sensing Data write by Frank Archer (III.). This book was released on 2001. Evaluating and Modeling Surface Soil Moisture Using Multi-frequency Passive Microwave Remote Sensing Data available in PDF, EPUB and Kindle.
