Gravel doesn't fit close together like clay soil particles do, slowing down water flow through mud. If you visualize gravel as a screen of 1/8th inch mesh and clay soil as a screen of 1/128th mesh ( 16 times smaller holes ) you can then easily understand that water flows very swiftly through the gravel screen compared to the fine particles of clay soils.
Low permeability and Steep slope
Because gravel has gaps that the water can travel through and clay is less likely to although water can still travel through it but slower
An aquitard is an impermeable lump of rock or clay. It does not allow water to flow through it which means that it blocks the water sending it to another destination.
The sandy soils let the water pass through but the clay soils hold the water
Sand. The sand has space between all of the little grains, clay is stuck together with less space.
Gravel doesn't fit close together like clay soil particles do, slowing down water flow through mud. If you visualize gravel as a screen of 1/8th inch mesh and clay soil as a screen of 1/128th mesh ( 16 times smaller holes ) you can then easily understand that water flows very swiftly through the gravel screen compared to the fine particles of clay soils.
No. Clay particles are very small and tend to attract other clay particles to from a matrix. Permeability refers to the ability of a gas or liquid to flow through a material. Because clay forms a tight matrix, gas and liquids flow very slowly through clay. Loose sand has high permeability
through flow is when infiltrated water moves through soil to the sea.
Gravity causes water to flow downwards. In porous ground the water will seep into the soil. If the water hits a non-porous layer (clay, for instance) the water will spread horizontally.
Low permeability and Steep slope
Because gravel has gaps that the water can travel through and clay is less likely to although water can still travel through it but slower
clay isn`t coarse enough but pebbles are
Water passes through clay slower because clay has greater density than regular dirt so it is a lot more compact.
If the plant can get established on the clay soil, it usually does very well. The problem is getting it established, as clay soil makes root penetration very difficult for the plant.
Clay has very small pore spaces
An aquitard is an impermeable lump of rock or clay. It does not allow water to flow through it which means that it blocks the water sending it to another destination.