- 32
- 198 809
Oklahoma State University Soil Physics
Приєднався 4 вер 2014
This channel features educational videos developed by members of the soil physics research group and students at Oklahoma State University. These videos are designed to explain important (and sometimes challenging) concepts from the discipline of soil physics in a clear, straight-forward way. Many of these videos are related to the free electronic textbook "Rain or Shine: An Introduction to Soil Physical Properties and Processes" by Tyson E. Ochsner, available for download at osf.io/z4rbt/.
Oklahoma soil water content, 1997-2023
This video shows the never-before-seen ebb and flow of soil water across the state of Oklahoma at 800-m (1/2 mile) resolution for three depths (5, 25, and 60 cm; or 2, 10, and 24 inches) from 1997 through 2023 with a daily time step. The video was produced by Evan Linde (Oklahoma State University High Performance Computing Center) using data from the Oklahoma Automated Soil Information System (OASIS). That system applies an automated mapping algorithm to soil moisture data from the Oklahoma Mesonet. Data can be viewed and downloaded at soilmoisture.okstate.edu/.
Reference:
Ochsner, T.E., Linde, E., Haffner, M. and Dong, J., 2019. Mesoscale soil moisture patterns revealed using a sparse in situ network and regression kriging. Water Resources Research, 55(6), pp.4785-4800. agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018WR024535
Reference:
Ochsner, T.E., Linde, E., Haffner, M. and Dong, J., 2019. Mesoscale soil moisture patterns revealed using a sparse in situ network and regression kriging. Water Resources Research, 55(6), pp.4785-4800. agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2018WR024535
Переглядів: 316
Відео
Soil water balance equation - example calculations
Переглядів 7 тис.Рік тому
This video explains the soil water balance equation and demonstrates how to use it to estimate the amount of irrigation to apply to a cropped field. This video was produced by Harsanjam Singh, a student in "Soil, Water, and Weather" and Oklahoma State University. The free e-textbook used in that course, "Rain or shine: An introduction to soil physical properties and processes" by Tyson E. Ochsn...
Green-Ampt ponded infiltration - example calculations
Переглядів 1,2 тис.Рік тому
Correction: There is a minor mistake in this video. The values for H_0 and H_f are swapped in a portion of the audio and visuals. The diagram, table, and equations are all correct, so if you focus on those, it should be clear. TEO 3/2/2024 This video demonstrates how to estimate the infiltration rate, cumulative infiltration, and time required for the wetting front to reach a specified depth us...
Soil water retention - example calculations
Переглядів 796Рік тому
This video demonstrates how to estimate the soil volumetric water content for a given soil matric potential based on the Campbell soil water retention function. This video was produced by Mark Barbadillo, a student in the class "Soil, Water, and Weather" at Oklahoma State University. The free e-textbook used in the class, "Rain or shine: An introduction to soil physical properties and processes...
Calculating soil bulk density, porosity, gravimetric water content, and volumetric water content
Переглядів 9 тис.Рік тому
This video demonstrates step-by-step calculations for these important soil variables. This video was created by Landon Neumann in 2022, as part of the class "Soil, Water, and Weather" at Oklahoma State University. For further information, download the free e-textbook "Rain or Shine: An Introduction to Soil Physical Properties and Processes" by Tyson E. Ochsner available at: osf.io/z4rbt/.
Calculating runoff with the NRCS curve number method
Переглядів 3,2 тис.Рік тому
This step-by-step tutorial shows how to use a spreadsheet to estimate daily runoff amounts using the NRCS curve number method. This video was created by Josh Everett in 2022, as part of the class "Soil, Water, and Weather" at Oklahoma Sate University. For more information, download the free e-textbook "Rain or Shine: An Introduction to Soil Physical Properties and Processes" by Tyson E. Ochsner...
Understanding soil crusting
Переглядів 903Рік тому
A soil crust is a relatively thin layer at the soil surface which has a higher bulk density, a reduced number of large pores, and a lower hydraulic conductivity than the underlying soil. Soil crusting can influence seedling germination, infiltration, erosion and more. This video provides a basic overview on soil crusting. This video was created by Barbara dos Santos in 2022, for the class "Soil...
Using a ternary diagram
Переглядів 1,6 тис.Рік тому
This video explains how to read or plot data on a special triangle-shaped plot called a ternary diagram. Ternary diagrams are commonly used to represent the percent of sand, silt, and clay particles within a soil sample, for example. This video was created by Madison Culver in 2022, as part of the class "Soil, Water, and Weather" at Oklahoma State University. This video is used in the free e-te...
Introduction to the surface energy balance
Переглядів 1,8 тис.3 роки тому
This video, created by Kelsey Singleton, provides a brief introduction to the land surface energy balance.
Bulk density and soil health
Переглядів 9533 роки тому
This video, created by Anna Zander, explains how soil health is influenced by bulk density and how to measure bulk density.
Ch. 13 Example - Soil Temperature Waves
Переглядів 4783 роки тому
Example calculation relevant to the free electronic textbook "Rain or Shine: An Introduction to Soil Physical Properties and Processes" by Tyson E. Ochsner available at soilphysics.okstate.edu/. Video created by Briana M. Wyatt.
Ch. 12 Example - Setting up Problem on Solar Radiation
Переглядів 3783 роки тому
Example calculation relevant to the free electronic textbook "Rain or Shine: An Introduction to Soil Physical Properties and Processes" by Tyson E. Ochsner available at soilphysics.okstate.edu/. Video created by Briana M. Wyatt.
Ch. 11 Example - Scheduling Irrigation
Переглядів 1,6 тис.3 роки тому
Example calculation relevant to the free electronic textbook "Rain or Shine: An Introduction to Soil Physical Properties and Processes" by Tyson E. Ochsner available at soilphysics.okstate.edu/. Video created by Briana M. Wyatt.
Ch. 10 Example - Steady Evaporation from a Water Table Follow Up
Переглядів 2893 роки тому
Example calculation relevant to the free electronic textbook "Rain or Shine: An Introduction to Soil Physical Properties and Processes" by Tyson E. Ochsner available at soilphysics.okstate.edu/. Video created by Briana M. Wyatt.
Ch. 9 Example - Solute Transport
Переглядів 6253 роки тому
Example calculation relevant to the free electronic textbook "Rain or Shine: An Introduction to Soil Physical Properties and Processes" by Tyson E. Ochsner available at soilphysics.okstate.edu/. Video created by Briana M. Wyatt.
Ch. 9 Example - Remediating Saline Soil
Переглядів 3443 роки тому
Ch. 9 Example - Remediating Saline Soil
Darcy's Law - Vertical flow example
Переглядів 28 тис.7 років тому
Darcy's Law - Vertical flow example
Darcy's Law - Horizontal flow example
Переглядів 19 тис.7 років тому
Darcy's Law - Horizontal flow example
Darcy's Law for Layered Soil - Example
Переглядів 8 тис.7 років тому
Darcy's Law for Layered Soil - Example
Sediment deposition and Stokes’ Law
Переглядів 32 тис.9 років тому
Sediment deposition and Stokes’ Law
Tutorial on climate data retrieval from the National Climatic Data Center
Переглядів 17 тис.10 років тому
Tutorial on climate data retrieval from the National Climatic Data Center
Steady evaporation from a water table
Переглядів 81910 років тому
Steady evaporation from a water table
Soil water potential in systems at equilibrium
Переглядів 2,8 тис.10 років тому
Soil water potential in systems at equilibrium
here for gamsat lol
worst video from this set I've seen, didn't really help with anything
Nice and concise
phenomenal.thanks for your work
My Bulk density question doesn't have the height of the soil. I only have soil 100cm3 rings
This was the best video reference I've seen so far from this textbook, the easiest to follow along with and understand!
isnt bulk density the density of the entire sample before it was dried? Maybe im mistaken but i think for your mass you were supposed to use 250g to calculate bulk density
Im confius too,should be before dried or after😢
In some engineering contexts, there is a need to know the wet bulk density, which would require the weight before drying. But in soil science, the dry bulk density is almost always used, thus requiring the dry weight.
comin' in clutch with the info here
?Can you remember a source
This has helped me alot thank you
Is it possible to determine the velocity or speed at which the water rises or enters through the capillarity tube?
Well done 👏
Hi😅
sir if depth(cm) of surface and caliberated age is given then how to calculated the rate of sedimentation with year?. (there is a paper named Palaeoenvironmental history of Bap-Malar and Kanod playas of western Rajasthan, Thar desert by Deotare,B.C.) in his paper there are two table in which depth is given and their caliberated age is given now i have to calculate that how much deposition is there in per cm. ? please help sir.
This helped me solve my soil problem in two seconds after finding this video! Wish I would have found it sooner because I had been searching the web for HOURS. Thank you!!!:)
Thanks a lot Sir, am a student and we did exactly the same question in class👨
Thank you really informative!
great
Thank you ❤️
😋😋If you want to download climatic data you can watch this video as well 😋ua-cam.com/video/aNja1K5Yl0Q/v-deo.html😋
Great job sir, thank you! Very clear I was rather lost before this!
Darcy's law has a minus sign.
What is the answer to the sample problem at the end?
Hello sir. Is stock law applicable for sediment diameter >0.1mm?
Yes, it is.
This video was very helpful to me
Nice. How would you prove that: open porosity = (Mwet - Mdry)/(Mwet - Msub)? Mwet = mass of the wet particle; Mdry = mass of dry particle; Msub = mass of submerged particle
Thank you
You're welcome
HULLO CHAMPION OF EARTH NARENDRA DAMODARDAS MODI.. WE ALL KNOW YOU HAVE WRITTEN A BOOK ON CLIMATE CHANGE .. YOU GOT SPONTANEOUS KNOWLEDGE LIKE GRETA THUNBERG , RIGHT? WE ALL KNOW THE SUBJECTS YOU GRADUATED IN BY CORRESPONDENCE COURSE, AND HOW YOU OBTAINED "KYHBER PASS" MARKS .. WE THE PEOPLE OF INDIA, REQUIRE YOU TO READ THE POST BELOW.. IT IS ONLY 28% COMPLETE.. CAPT AJIT VADAKAYIL WILL RUN YOU DOWN IF YOU DONT READ IT .. YOU HAVE RUINED INDIA AND THIS PLANET.. RIGHT NOW HIS ENGINE IS IN NEUTRAL.. DONT FORCE HIM TO COME TOWARDS YOU ON FULL THROTTLE OVERDRIVE.. ajitvadakayil.blogspot.com/2020/07/pm-modi-ignored-dire-warning-of-capt.html capt ajit vadakayil
there should be "--" sign in front of K, isn't it?
Very helpful.. Thank you!
Glad it was helpful!
Sir i have some dought.is that anyway i can contact you?
can you help me complete this question? A capillary tube of diameter 1 mm is dipped in water. The water has a density of p = 998.2 kg/m^3, and a surface tension of T = 7.12x10^-2 N/m at a temperature of 30°C. (i) calculate the capillary rise of water in the tube if the contact angle = 0°. it will really help if me thanks
pores of the soil mean the holes in the soil particles? what's that difference between fine texture soil? does this mean if I use sand, then would get higher height?
WHAT A BAD VIDEO
Thank Professor so much it is actually working with my thesis. NCU student!
Watching from the University of Minnesota! Thank you ♥️
Did u know about how to download Ensemble precipitation data from NCEP
no
Excellent
How do you calculate for the Hydraulic gradient? Is it constant? And does the height of the water affects its permeability? Why is it in 100cm and 60cm?
100 Cm and 60 cm are given in the Question.. Hydraulic Gradient= (Head loss)/Length It means (100-60)/50
your hf might be negative ,because your point a is zero
Thanks a lot.
Any vedio about Goncharov (1964) equation ???
Please i have a quiston in Darcy's law vertical can you help me?
"Stoke's Law" is a calculated artifice not found in real world deposition because of the flocculation habits typical of actual muddy sediments. One has to artificially deterge the test sediments to get them to behave in accordance with the "law"; such laundered sediments are never found in the field, rendering the application in this video moot.
this seemed so hard in my textbook..you made it so simple...I'M UTTERLY GRATEFUL..THANK YOU SO MUCH !
Hello an appointment What happens to the surface area of the darcy equation? Q = K * ((h2-h1) / L) * A ....Greetings
thank you so much. now i can see
Hello SOIL 4683, please do not take this video down anytime soon! The Envirothon's current issue (www.envirothon.org/) this year is agricultural soil and water conservation stewardship. This is the best video I have found by far that describes the RUSLE2!
Thanks a lot! Well explained :)
At 5:05, how did you evaluate that integral and solve for E?
can u do this if the layers are horizontal and not vertical as shown ?
Good question. Yes, you can. Just be careful how you calculate the difference in total soil water potential across the layers. For horizontal flow, the gravitational potential does not contribute to the gradient.