Questions tagged [soil-moisture]
The soil-moisture tag has no usage guidance.
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Question about VV and HH polarizations in radar
I am doing something with ASCAT which is measuring backscatter to reflect the status of soil moisture. Some research indicated that VV polarization is much more suitable for soil moisture measurement ...
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Can single point value for potential water-logging be calculated using soil particle size, organic matter and bulk density
I am studying the recent paludification (e.g. mineral soil forests turning to peatlands) in a boreal regime. I have collected peat samples from the peat/mineral subsoil contact that have been 14C ...
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Volumetric Soil Water to Gravimetric Moisture
I have a dataset from ERA LAND with a Volumetric Soil Water (m3 m-3), How I could convert to a Gravimetric Moisture content (kg kg-1)?
BR
Sergio
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Read SMAP grib data using python
While reading the SMAP data (grib format) using xarray with cfgrib as engine, the variable is shown as unknown and the longitude of the data has a value of around ...
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Approximating Soil Moisture level
Are there any simple models to approximate soil moisture level (%) as a function of distance from a waterbody (say a lake)? If one assigns saturation level of lake to 100% , then are there any ...
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How to define the lower boundary conditions: seepage face and unit gradient in terms of soil volumetric water content?
context: the models that simulate the flow of water in the soil (e.g. land-surface models)
In these models, in order to simulate percolation (/drainage) from the bottom of the defined soil column, we ...
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Why is the soil between these olive trees left bare?
These photos were taken this week in the Tarragona province of Spain which is also seeing a heat wave at the moment. One can also see farmers using cultivators removing what were wild weeds that grew ...
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Run Hydrus-1D on Linux
I want to run Hydrus-1D on Linux, and I wonder if anyone knows about this to help me. I could compile the source code on Linux but it is not working. I really appreciate any help regarding this.
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soil water retention and soil water content
Can someone clarify me about this doubt?
Is the available soil water content (field capacity minus wilting point) the same as the soil water moisture or soil water content?
Thank you.
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Global gridded Leaf Area Index and Soil Depth data for hydrological analysis - references and unmixing by land use
I am working with a global fully distributed (gridded) hydrological model and I am having some issues regarding two sets of data extremely important for the correct representation of the soil ...
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How to Distribute Soil moisture output of Thornthwaite and Mather (1954) Soil Water Balance Model into different layers?
in Thornthwaite & Mather (1954) Soil Water Balance Approach
The soil moisture output is generated for the whole soil profile, i.e whatever depth we take for the ...
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How to estimate evapotranspiration using moisture sensors?
There is a 210 cm long soil column that has five layers of different soil types. The topsoil layer of 15 cm has a moisture sensor in the middle. The second and third layers are of 95 and 80 cm of ...
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How to obtain the saturation point of a soil layer from the volumetric soil water content data?
Would you please let me know if the following is accurate as an answer to the question:
Suppose we have sensors which measure the volumetric soil water content of a soil layer for a long period (more ...
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Which unsupervised classification method for non linear multivariate time series earth observation data in python
I have collect several data sets for a small region in Germany called Hessisches Ried (about 90 km²) from different sources for a time period from 2015 to 2019. Daily rainfall amount & daily ...
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How does SMAP detect soil statistics?
So there's a NASA satellite called SMAP currently orbiting Earth right now, and it can measure soil moisture, and detect whether or not soil is frozen or thawed. It knows this since it uses radar to ...
user17688
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What's a Good Soil Quality Index for Plowed Farm Lands?
I'm currently conducting research using Satellite/Weather/Soil (Mostly Sentinel-2 Satellite Imagery) Data to Model Smallholder Farms and their dynamics before Planting.
Key to my progress is to find ...
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Difference between soil Water Holding Capacity and soil pore volume?
I have got confused
I took 100g soil in a funnel with filter paper. poured 100 ml water and collected the drained water in a calibrated cylinder.
Water added in funnel = 100 ml
Water collected in ...
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soil that is dried (no pore space) weight?
How much would 1 m3 of an ideal mineral SOIL that has been completely dried (all pore space is empty) weigh in Mg on Earth? Answer = ______ Mg
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How many kg $ha^-$$^1$ of exchangeable $Mg^2$$^+$ is there in the top 15cm of this field?
Soil testing from a well-drained soil sample in 0-15cm depth of a farmers field provides the following
information:
• Wet weight of a soil sample from a volume of 100 $cm^3$: 200 g
• Moisture ...
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Statistical dependence of mean annual soil evaporation and mean annual precipitation globally
I am studying a simple dynamical system that represents a plant and water system, similar to Klausmeier. In Klausmeier model the mean annual precipitation and the soil evaporation are introduced as ...
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What is the difference between Water Holding Capacity, Field Capacity and TAWC?
I am reading the paper Characterization of yield reduction in Ethiopia using a GIS-based crop water balance model by Gabriel B. Senay and James Verdin, and it says on page 3:
Soil water content (SW)...
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How much excess water prevents planting of a crop
It's a generic question but was wondering if there is a threshold level of soil water beyond which planting a crop (for e.g. soybean) can be hindered because the soil is too wet or flooded.
As a ...
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Transformation of soil moisture units
I have soil moisture data from Regional Climate Models expressed in $kg/m^2$. Τhis quantity is the total soil moisture that is estimated for the land column. The depth of this column is dependent on ...
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Passive capillary wick samplers
I am interested in sampling soil solution at different depths on Andean soils. I have found that Passive-capillary samplers have been extensively used to sample soil water, however I was not able to ...
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Soil moisture conditions and air temperatures - literature needed
I am looking at basics academic papers which tell about the physical floods mechanisms.
In particular something that says that: 'lower temperatures reduce evapotranspiration, enhancing wet soil ...
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How to convert soil moisture units from meteorological model?
I am using the outputs of the ALADIN meteorological model, in particular I need volumetric soil moisture. However, the output from ALADIN is in "funny" units - $\mathrm{kg/m}^2$ per top 1 cm. Is it ...
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What's a frost-gley?
I've noticed this term in a book about Pleistocene East Europe. It's apparently a soil which was formed during the interstadials, but that's all my book says, and I can't find much more on the ...
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Initial indexes for calculating the Fire Weather Index (in the Canadian Forest Fire Weather Index System)
I am applying the Canadian Fire Weather Index (FWI) on the Forest Fire Warning System of my laboratory.
My problem is in calculating the Fine Fuel Moisture Code (FFMC), the Duff Moisture Code (DMC) ...
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What is hydraulic diffusivity?
I'm having trouble grasping which properties of the soil are described by hydraulic diffusivity (sometimes referred to as soil-moisture diffusivity which is based on the diffusion equation).
What ...
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Is there a standard definition of a "dry-down" event in hydrology?
When studying the land surface, dry-down periods - periods after rain where the soil moisture is decreasing due to evapotranspiration and drainage - are of great interested, because soil moisture has ...
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