Assessing Spatial and Temporal Soil Water Content Variation with GPR

2008 ◽  
pp. 345-358
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Content Variation

Monitoring Temporal Development of Spatial Soil Water Content Variation

2003 ◽  
Vol 2 (4) ◽  
pp. 519
Author(s):  
J. A. Huisman ◽  
J. J. J. C. Snepvangers ◽  
W. Bouten ◽  
G. B. M. Heuvelink
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Temporal Development ◽  
Content Variation

scholarly journals Temporal variability of soil water content under different surface conditions in the semiarid region of the Pernambuco state

2010 ◽  
Vol 34 (5) ◽  
pp. 1733-1741 ◽  
Author(s):  
Thais Emanuelle Monteiro dos Santos ◽  
Demetrius David da Silva ◽  
Abelardo Antônio de Assunção Montenegro
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Surface Condition ◽  
Soil Surface ◽  
Bare Soil ◽  
Semiarid Region ◽  
Surface Conditions ◽  
Content Variation ◽  
Contour Lines

Rainfall in the semiarid region of Pernambuco is characterized by irregular distribution in time and space, which significantly hinders the rainfed agriculture in the region. This work aims to evaluate the temporal profile of soil moisture in the semiarid region of the Pernambuco State (Brazil) and the effect of different soil surface conditions on soil water content variation and the yield of rainfed beans. To monitor soil water content, five plots 4.5 m wide by 11 m long were installed in a Yellow Argisol (Ultisol). The following treatments were adopted in the experimental plots: natural vegetation, bean intercropped with cactus, beans planted down the slope, beans planted along contour lines with mulch and rock barriers, and bare soil. In each plot, eight PVC access tubes were installed for monitoring the soil water content profile at depths of 0.20 and 0.40 m using a neutron probe device. The surface condition significantly influenced the soil water content variation, both in the dry and rainy seasons. The use of mulch, associated with rock barriers, provided higher soil water content levels than the other treatments and increased the rainfed beans production.

scholarly journals Assessing soil water content variation in a small mountainous catchment over different time scales and land covers using geographical variables

2020 ◽  
Vol 591 ◽  
pp. 125593
Author(s):  
Florian Mallet ◽  
Vincent Marc ◽  
Johnny Douvinet ◽  
Philippe Rossello ◽  
Daniel Joly ◽  
...  
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Time Scales ◽  
Mountainous Catchment ◽  
Content Variation ◽  
Land Covers ◽  
Different Time Scales

Soil Water Content Variation Regression Analysis Using Hyperspectral Camera in Weathered Granite Soils

2020 ◽  
Author(s):  
Hwan-hui Lim ◽  
Seung-Rae Lee ◽  
Enok Cheon ◽  
Deukhwan Lee ◽  
Seungmin Lee
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Near Infrared ◽  
Prediction Models ◽  
Physical Parameters ◽  
Least Squares Regression ◽  
Weathered Granite ◽  
Content Variation ◽  
Hyperspectral Camera

<p>Soil water content is one of the most common physical parameters that cause landslides or debris flow. Therefore, it is of very importance to determine or predict the water content variation due to infiltration of rainfall quickly and non-destructively. This study investigates the hyperspectral informations in the visible near-infrared regions (VNIR, 400nm~1000nm) of different samples of granite soils possessing varying water contents. Totally 162 granite samples were taken from 3 mountain areas. A Partial Least Squares Regression (PLSR) analysis was applied to develop calibration models and prediction models.  In the water content variation prediction model, the Area of ​​Reflectance(Near-infrared, NIR) parameter was the most suitable parameter to determine the water content. The results demonstrate that the hyperspectral camera combined with the PLSR model can be a useful and non-destructive tool for the determination of soil water content variation in the weathered granite soils that could be applied to the evaluation of possible instable area in a mountain site.</p>

SOIL WATER CONTENT AFFECTS THE AVAILABILITY OF PHOSPHATE

1985 ◽  
pp. 185-189
Author(s):  
M.C.H.Mouat Pieter Nes
Keyword(s):  
Water Content ◽  
Soil Water ◽  
Soil Water Content ◽  
Soil Solution ◽  
Equivalent Reduction

Reduction in water content of a soil increased the concentration of ammonium and nitrate in solution, but had no effect on the concentration of phosphate. The corresponding reduction in the quantity of phosphate in solution caused an equivalent reduction in the response of ryegrass to applied phosphate. Keywords: soil solution, soil water content, phosphate, ryegrass, nutrition.

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