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4 votes

Transformation of soil moisture units

The other answers are correct that you need to know the soil depth to convert from mass units (kg m-2) to volumetric units (m3 m-3). However, when comparing these variables you should also be aware ...
Deditos's user avatar
  • 3,950
4 votes
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How to obtain the saturation point of a soil layer from the volumetric soil water content data?

I assume you mean sensors that measure volumetric soil water content. The answer will depend on the amount of precipitation and the permeability of the soil. Soils don't reach full saturation in some ...
haresfur's user avatar
  • 4,419
3 votes

Read SMAP grib data using python

It seems like the GRIB format is being used to distribute the data (probably for storage, ease of processing?), while satellite SMAP doesn't fit under the GRIB standard (see available parameters ...
Ingvar Lukas's user avatar
3 votes
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What is the difference between Water Holding Capacity, Field Capacity and TAWC?

Okay Water Holding Capacity(WHC) is how much water the soil has in it at total saturation, if you filled every soil pore space completely with water. Field Capacity(FC), if I remember correctly from ...
Ash's user avatar
  • 4,270
2 votes

Soil moisture conditions and air temperatures - literature needed

If you're after "basic" academic work, I suggest the following 2003 textbook from the Utah State University entitled, "Rainfall Runoff Processes", chapter 2: Runoff Generation Mechanisms It looks ...
Knob Scratcher's user avatar
2 votes
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How to convert soil moisture units from meteorological model?

Your method looks OK, however, water density varies with temperature. Not knowing exactly what your aim is or how accurate/fussy you want to be, you may want to consider using the density of water ...
Fred's user avatar
  • 24.7k
2 votes

How to define the lower boundary conditions: seepage face and unit gradient in terms of soil volumetric water content?

It's been many months since August, but maybe someone else will find this useful. Like a lot of questions in hydrology - the appropriate boundary condition is defined by accurately characterizing the ...
Mortsde's user avatar
  • 41
2 votes

Why is the soil between these olive trees left bare?

Bare soil is one of the worst things for erosion. Such soil contains no plant roots to help contain the soil and thus prevent erosion. Bare soil is also one of the worst things for water loss from ...
Fred's user avatar
  • 24.7k
2 votes
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How does SMAP detect soil statistics?

The SMAP includes both an active L-band synthetic aperture radar and a passive microwave radiometer. Any object above a temperature of absolute 0 will emit thermal radiation over a wide range of ...
Brian Borchers's user avatar
1 vote

Volumetric Soil Water to Gravimetric Moisture

Use bulk densities of water and the ground in question. Density, ρ, is mass divided by volume. $\ \ \rho \ = \ \frac{m}{V}$ Rearrange the equation to get mass, density times volume. Depending on how ...
Fred's user avatar
  • 24.7k
1 vote

Difference between soil Water Holding Capacity and soil pore volume?

As Friddy says, if it's not constrained and relatively intact you're going to have issues with pore volume calculations. Generally the saturate-and-dry method, using a soil core, will give you both ...
DataWrangler's user avatar
1 vote
Accepted

How much excess water prevents planting of a crop

In practice you really don't want to plant a field that is even close to capacity. Doing so will result in ruts, soil compaction, breakdown of soil structure and a large increase in fuel consumption. ...
Sherwood Botsford's user avatar
1 vote

Transformation of soil moisture units

I will cite this medium post referring to LDAS datasets Many of the output fields for water amounts (e.g., precipitation, evapotranspiration, soil moisture, etc.) are given in units of $[kg\ m^{-2}]$....
Robert Chang's user avatar

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