Table of Contents
What are the factors that affect run off?
Meteorological factors affecting runoff:
- Type of precipitation (rain, snow, sleet, etc.)
- Rainfall intensity.
- Rainfall amount.
- Rainfall duration.
- Distribution of rainfall over the watersheds.
- Direction of storm movement.
- Antecedent precipitation and resulting soil moisture.
How can the steepness of the land affect erosion?
Erosion moves soil and other particles. With more force, water can move more rock particles and larger ones. The speed at which water flows downhill is directly affected by the slope, or steepness, of the land. The steeper the slope, the faster the water flows downhill, and the greater its power of erosion.
How does slope affect land?
Angle of the slope Steep slopes have a greater impact on soil composition than surfaces with a slight slant. The minerals and organic content present in the soil moves down toward the slope, due to heavy rainfall. Soil erosion is experienced higher in slope with less vegetation.
What is run off explain in brief Factors Affecting run off?
Runoff depends on the intensity of rainfall. More the rainfall, more will be runoff. If the rainfall intensity is very less and it rains as light showers then much of the water will be lost in infiltration & evaporation resulting less runoff. If precipitation is in case of snow then less runoff.
What causes erosion on a hill?
Hills are also formed because of erosion, which happens when bits of rock, soil, and sediment get washed away and placed in a pile somewhere else. Hills can be destroyed by erosion, as material is worn away by wind and water.
How does slope of land affect the climate?
Land can heat up or cool down much quicker than water. Therefore, coastal areas have a lower temperature range than those inland areas due to the moisture content. Slope and aspect affect the moisture and temperature of air and soil. Sun‐facing slopes are warmer than those that are not.
Why does slope affect infiltration?
On the steeper slopes, the soil depth is less and hence, there is a greater reduction in the infiltration capacity with the same amount of rainfall. The decrease in depression storage means that less infiltration excess is required to initiate overland flow.
What is run off what are the factors that affect the run off from a catchment area describe the methods of computing run off from a catchment area?
The more the rainfall, the more will be the runoff. Runoff depends on the type of the storm causing precipitation, and also upon its duration. Runoff also increases with the intensity of rainfall and with the extent of the storm over the catchment. Thus, the runoff will be less.
How does vegetation affect the amount of runoff?
Dense vegetation with proteoid roots (hairy roots with a large surface area) can absorb large volumes of water even in storm conditions, which will prevent runoff. Where field capacity is reached in the soil, no more infiltration can take place and therefore runoff will occur.
How does slope affect infiltration rate and runoff?
with increase in slope gradient but in unstable soils that tend to seal, the effect of slope on infiltration rate and runoff can be complementary. With increase in slope angle there may be a tendency of seal erosion and subsequent increase in infiltration rate and decrease in runoff despite the fact that velocity of runoff increases with
What makes runoff more likely in urban areas?
Heavy use of agricultural machinery can compact the soil and reduce its infiltration capacity, making runoff more likely. Urban land use. Changing greenfield surfaces to impermeable concrete and tarmac as construction takes place can increase the level of runoff in an area.
Why does runoff occur in V shaped valleys?
In “v” shaped valleys on steep slopes, runoff will increase due to gravity. On flatter surfaces runoff is less likely to happen as water will be able to infiltrate into the soil more easily.