enow.com Web Search

Search results

1. Results from the WOW.Com Content Network

2. Digital soil mapping - Wikipedia

   en.wikipedia.org/wiki/Digital_soil_mapping

   Digital soil mapping (DSM) in soil science, also referred to as predictive soil mapping [1] or pedometric mapping, is the computer-assisted production of digital maps of soil types and soil properties. Soil mapping, in general, involves the creation and population of spatial soil information by the use of field and laboratory observational ...

3. Soil mechanics - Wikipedia

   en.wikipedia.org/wiki/Soil_mechanics

   Water pressure, u, is negative above and positive below the free water surface. If the soil pores are filled with water that is not flowing but is static, the pore water pressures will be hydrostatic. The water table is located at the depth where the water pressure is equal to the atmospheric pressure. For hydrostatic conditions, the water ...

4. Atterberg limits - Wikipedia

   en.wikipedia.org/wiki/Atterberg_limits

   The Atterberg limits are a basic measure of the critical water contents of a fine-grained soil: its shrinkage limit, plastic limit, and liquid limit. Depending on its water content, soil may appear in one of four states: solid, semi-solid, plastic and liquid. In each state, the consistency and behavior of soil are different, and consequently so ...

5. Cone penetration test - Wikipedia

   en.wikipedia.org/wiki/Cone_penetration_test

   A friction sleeve was added to quantify this component of the friction and aid in determining soil cohesive strength in the 1960s. [1] Electronic measurements began in 1948 and improved further in the early 1970s. [2] Most modern electronic CPT cones now also employ a pressure transducer with a filter to gather pore water pressure data. The ...

6. Water retention curve - Wikipedia

   en.wikipedia.org/wiki/Water_retention_curve

   Water retention curve is the relationship between the water content, θ, and the soil water potential, ψ. The soil moisture curve is characteristic for different types of soil, and is also called the soil moisture characteristic. It is used to predict the soil water storage, water supply to the plants (field capacity) and soil aggregate stability.

7. Standard penetration test - Wikipedia

   en.wikipedia.org/wiki/Standard_penetration_test

   The standard penetration test (SPT) is an in-situ dynamic penetration test designed to provide information on the geotechnical engineering properties of soil. This test is the most frequently used subsurface exploration drilling test performed worldwide. The test procedure is described in ISO 22476-3, ASTM D1586 [1] and Australian Standards AS ...

8. Geotechnical investigation - Wikipedia

   en.wikipedia.org/wiki/Geotechnical_investigation

   These tests are used to determine the maximum unit weight and optimal water content a soil can achieve for a given compaction effort. Soil suction tests ASTM D5298. Triaxial shear tests This is a type of test that is used to determine the shear strength properties of a soil. It can simulate the confining pressure a soil would see deep into the ...

9. Tensiometer (soil science) - Wikipedia

   en.wikipedia.org/wiki/Tensiometer_(soil_science)

   When the soil is wetted flow can also occur in the reverse direction: as water is added to the soil, the vacuum inside the tube pulls moisture from the soil and decreases. When the water pressure in the tensiometer is determined to be in equilibrium with the water pressure in the soil, the tensiometer gauge reading represents the matric ...