Correct Answer - Option 4 : A - 3, B - 4, C - 1, D - 2
Horton's Formula:
Infiltration is the process in which water enters into the soil and the rate at which water enters into the soil is known as infiltration rate. Under the ponding condition, the infiltration rate decreases exponentially, and it can be represented by the Horton equation. According to Horton’s equation,
\({\rm{f}} = {{\rm{f}}_{\rm{c}}} + \left( {{{\rm{f}}_0} - {{\rm{f}}_{\rm{c}}}} \right) \times {{\rm{e}}^{ - {\rm{kt}}}}\)
Where,
f = infiltration capacity at time t, f0 = initial infiltration capacity, fc = constant infiltration capacity after long time, and k= Horton’s decay constant
Lysimeter:
A Lysimeter is a measuring device that can be used to measure the amount of actual Soil moisture lost from the soil column (indirectly actual evapotranspiration) that is released by plants (usually crops or trees). By recording the amount of precipitation that an area receives and the amount lost through the soil, the amount of water lost to evapotranspiration can be calculated. Lysimeters are of two types: weighing and non-weighing.
Blaney-Criddle method:
It is used to determine evapotranspiration i.e. consumptive use of the crop.
It is one of the oldest methods to measure evapotranspiration (Consumptive use of water).
Pan coefficient:
It is the ratio of lake evaporation and pan evaporation.
In order to convert pan evaporation value into lake evaporation value, a pan coefficient is used.
Lake evaporation = Pan Coefficient (Cp) × Pan Evaporation
