FA 1 (part 1) Flashcards
(25 cards)
According to Horton’s equation, the final steady-state infiltration rate is independent of rainfall intensity.
TRUE or FALSE
TRUE
Which model considers a steady infiltration rate that is independent of time at the final stage of
infiltration?
-Philip’s model
-Horton’s model
-Kostyakov’s model
Horton’s model
The soil’s ability to absorb water increases with increasing surface roughness.
TRUE or FALSE
TRUE
Infiltration rates are not influenced by the degree of soil compaction.
TRUE or FALSE
FALSE
The depth of the soil influences the rate of infiltration.
TRUE or FALSE
TRUE
What characteristic of loamy soil aids in its infiltration capacity?
A. It has larger particles than sandy soil
B. It retains all water without allowing infiltration
C. It balances sand, silt, and clay, facilitating good water flow.
D. It is too dense to allow water to pass through
C. It balances sand, silt, and clay, facilitating good water flow.
Which factor is the most significant in reducing the infiltration capacity of a soil during a storm event?
A. Soil saturation
B. Soil moisture content
C. Increased vegetation cover
A. Soil saturation
Surface entry of water is independent of the soil’s structure.
TRUE OR FALSE
FALSE
Runoff calculations do not consider prior moisture conditions in the soil.
TRUE OR FALSE
FALSE
Soil moisture content just prior to a rainfall doesn’t influence the infiltration capacity.
TRUE OR FALSE
FALSE
Philip’s model assumes a constant rate of infiltration over time.
TRUE OR FALSE
FALSE
A flow meter is a device used to measure the quantity of water flow in a pipe or open channel.
TRUE OR FALSE
TRUE
How can the addition of gravel to soil affect its infiltration capacity?
A. It slows down water absorption.
B. It has no effect on water movement.
C. It decreases infiltration by compacting the soil.
D. It can increase infiltration by providing larger pore spaces.
D. It can increase infiltration by providing larger pore spaces.
Rain gardens are designed to capture excess rainfall and promote infiltration.
TRUE OR FALSE
TRUE
Vegetation can decrease soil erosion, consequently promoting higher infiltration rates.
TRUE OR FALSE
TRUE
In Philip’s model, the steady infiltration rate is assumed to be constant.
TRUE OR FALSE
TRUE
Fine-grained soils, such as clay, tend to have lower infiltration rates because they have smaller pores that water has to navigate through.
TRUE OR FALSE
TRUE
Which process is primarily responsible for water entering the soil?
A. Capillary action
B. Infiltration
C. Evapotranspiration
D. Surface runoff
B. Infiltration
The Philip infiltration equation is applicable to soils where infiltration varies with depth.
TRUE OR FALSE
FALSE
According to the Horton model, what happens to the infiltration rate over time during a rainfall event?
A. It remains constant
B. It decreases exponentially
C. It increases exponentially
B. It decreases exponentially
The moisture retention in soil influences the rate at which infiltration occurs.
TRUE OR FALSE
TRUE
Philip’s model is often used in large-scale hydrological studies to estimate runoff based on infiltration characteristics.
TRUE OR FALSE
TRUE
Infiltration capacity decreases with increasing soil depth.
TRUE OR FALSE
TRUE
Water infiltration tends to be uniform across all soil types.
TRUE OR FALSE
FALSE
