نتایج جستجو برای: soil moisture content

تعداد نتایج: 592806  

2009
Joel B. Sankey Matthew J. Germino Nancy F. Glenn

1875-9637/$ see front matter 2009 Elsevier B.V. A doi:10.1016/j.aeolia.2009.07.002 * Corresponding author. Tel.: +1 208 220 6571; fax E-mail addresses: [email protected], jbsankey@hotm [email protected] (M.J. Germino), [email protected] (N.F. G 1 Tel.: +1 208 282 3285; fax: +1 208 282 4570. 2 Tel.: +1 208 345 1994; fax: +1 208 345 8353. Aeolian transport is an important contemporary geomorphic process ...

2012
Jitendra Behari

Surface soil moisture is important to understand environmental systems and dielectric constant is a convenient physical parameter to describe this. Dielectric Mixing models relate the effective dielectric constant of a heterogeneous medium with the properties of constituent materials. The dielectric properties of the soil is known to have dependence on Soil moisture content along with other fac...

Journal: :international journal of advanced biological and biomedical research 2014
afshin azmoodeh-mishamandani shamsollah abdollahpoor hossein navid mohammad moghaddam vahed

the object of this study was evaluation of a walking tractor drawn peanut harvester at different conditions of soil moisture content and forward speed and comparing it with manual harvesting. the evaluation factors for peanut harvester were two levels of soil moisture content and three levels of forward speed. the results revealed that the effect of soil moisture content was only significant on...

2007
Kristine M. Larson Ethan Gutmann Penina Axelrad John Braun

Measurements of soil moisture are important for studies of climate and weather forecasting, flood prediction, and aquifer recharge studies. Although soil moisture measurement networks exist, most are sparsely distributed and lack standardized instrumentation. Measurements of soil moisture from satellites have extremely large spatial footprints (40–60 km). A methodology is described here that us...

2010
Valeriy Y. Ivanov Simone Fatichi G. Darrel Jenerette Javier F. Espeleta Peter A. Troch Travis E. Huxman

[1] By partitioning mass and energy fluxes, soil moisture exerts a fundamental control on basin hydrological response. Using the design characteristics of the Biosphere 2 hillslope experiment, this study investigates aspects of soil moisture spatial and temporal variability in a zero‐order catchment of a semiarid climate. The hydrological response of the domain exhibits a particular structure, ...

2017
Marco Leone Sofia Principe Marco Consales Roberto Parente Armando Laudati Stefano Caliro Antonello Cutolo Andrea Cusano

This work deals with the fabrication, prototyping, and experimental validation of a fiber optic thermo-hygrometer-based soil moisture sensor, useful for rainfall-induced landslide prevention applications. In particular, we recently proposed a new generation of fiber Bragg grating (FBGs)-based soil moisture sensors for irrigation purposes. This device was realized by integrating, inside a custom...

2014
JOSEPH LEVY ANNE NOLIN ANDREW FOUNTAIN JAMES HEAD

Soil moisture is a spatially heterogeneous quantity in the McMurdo Dry Valleys of Antarctica that exerts a large influence on the biological community and on the thermal state of Dry Valleys permafrost. The goal of this project was to determine whether hyperspectral remote sensing techniques could be used to determine soil moisture conditions in the Dry Valleys. We measured the spectral reflect...

2016
N. Sánchez J. Martínez-Fernández

A synergistic fusion of the Soil Moisture and Ocean Salinity (SMOS) L2 soil moisture with the Moderate Resolution Imaging Spectroradiometer (MODIS)-derived land surface temperature (LST) and several water/vegetation indices for agricultural drought monitoring was tested. The rationale of the calculation is based on the inverse relationship between LST and vegetation condition, related in turn w...

Journal: :IEEE Trans. Geoscience and Remote Sensing 2003
Eni G. Njoku Thomas J. Jackson Venkat Lakshmi Steven Tsz K. Chan Son V. Nghiem

The Advanced Microwave Scanning Radiometer (AMSR-E) on the Earth Observing System (EOS) Aqua satellite was launched on May 4, 2002. The AMSR-E instrument provides a potentially improved soil moisture sensing capability over previous spaceborne radiometers such as the Scanning Multichannel Microwave Radiometer and Special Sensor Microwave/Imager due to its combination of low frequency and higher...

2008
Wenxiong Huang Stephen Fityus

Measurement of water content in expansive soil using a neutron moisture meter is strongly influenced by the moisture reactive property of this type of soil. It is particularly difficult to calibrate a neutron moisture meter when the dry density changes and the soil cracks during drying. This numerical study models the neutron probe measurement of soil moisture, based on a 7-group diffusion theo...

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