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when the annual rainfull numbers starts to desends gradually for more than one season .

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12y ago

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Why is erosion after rainfall a concern in desert areas?

Erosion after rainfall is a concern in desert areas because desert soils are typically dry and lacking in vegetation, making them more susceptible to erosion. Rainfall can cause flash flooding and wash away topsoil, leading to reduced soil fertility, loss of nutrients, and increased desertification in these fragile ecosystems.


What is the difference between runoff and rainfall?

Rainfall refers to the precipitation of water droplets from the atmosphere to the ground. Runoff, on the other hand, is the movement of excess water on the ground surface due to factors like saturation or impermeable surfaces. Essentially, runoff is the flow of water that occurs after rainfall.


How does the amount of rainfall preserves watershed?

Rainfall helps to replenish the water in a watershed, maintaining the overall water balance. Adequate rainfall keeps water levels stable, supports healthy vegetation, and allows for natural water filtration processes within the watershed, contributing to its preservation.


Why rainfalls are so immportant?

Rainfall is a important part of water cycle that we have studied in our earlier classes. Without rainfall, how would water that gets evaporated from water bodies will be back to their origin. Rainfall occurs because water droplets that constitute clouds gets so big in size that they no longer can be in air and falls down in form of rain.


What does marginal rainfall mean?

Marginal rainfall refers to low or minimal amounts of rainfall that might not be enough to significantly impact water resources or ecosystems. It can indicate below-average precipitation levels in a region, leading to potential drought conditions and water scarcity.