What type of rain is the most common?
The most common type of rain is known as stratiform rain. Stratiform rain is characterized by steady, widespread precipitation that lasts for an extended period of time. It is often associated with large, layered cloud systems and tends to produce light to moderate rainfall.
Why does river straightening reduce flood risk?
Straightening of river reduces floods in the immediate area because it allows the water to go straight instead of having to turn through curves. A natural meandering river has a curvy or sinusoidal shape to its path. A straight river would travel only a kilometer per kilometer of valley floor. Water associated with a curvy river will have to follow the natural sinusoidal curves and will travel considerably more distance per kilometer of valley floor. Also, water in a natural river will have a slower velocity because the course of the river is altered with every curve. A straight river sheds water faster from the immediate area because it has less distance to travel and is not slowed by the curves, however the straightening a river is associated with negative consequences including increased risk of flooding downstream and increased erosion.
Increasing the velocity causes more erosion. If a river is straight then erosion digs the river into a deeper and deeper channel. A curvy river is typically has a slower velocity and erodes less. Also the erosion in a curvy river is associated with the 'cut bank' or outside of each curve not with a deepening channel as seen in straightened rivers. If you imagine yourself as a water molecule traveling down the river when you arrive at the outside of a curve your inertia will cause you to run into the 'cut bank' until the outer bank slows your speed and alters your course. You may have caused a slight bit of erosion but because you keep hitting curves you can not build up the speed needed to induce much erosion. After eroding from the "cut bank" sediment is often deposited in the 'point bar' or inside of the next curve. This causes the curves to slowly meander sometimes leaving 'ox bows' or multiple channels. Building roads or structures in these meandering curves is unwise as inevitably erosion will destroy the structure. The fast moving waters of a straight river can carry far more sediments down stream because of the increased velocity. Straightened streams often had to be lined with concrete or 'rip rap' where the original curvy river did not because the high velocity induced severe deepening of streams and both banks would then collapse in.
Straitened rivers increase the risk of flooding downstream. A straight river or stream holds less water per distance unit of valley floor than a natural and curvy river. In a rain event a natural curvy river will hold more water. Also, since it is not slowed by the curves of a natural river, a straight river will shed what little water it holds faster. This is exacerbated by the draining of wetlands upstream and the tiling of agricultural lands to shed standing water. Wetlands and intermittent pools act as large sponges, holding and delivering rain and snow-melt slowly to downstream rivers. Furthermore, the loss of flood planes by building levies causes rivers to rise higher during flood events and again delivers more water downstream in a short amount of time.
Floods downstream have become more 'flashy' and acute because of straightening of rivers, building of levies and draining of wetlands. A rain event in the Midwest of North America prior to European settlement would have induced far less of a flood height down stream than the same rain event would cause today. This is because the water would be delivered to downstream locations slowly over a greater duration of time.
How the acid rain effect nature?
Acid rain can harm plant life by damaging leaves and reducing a plant's ability to absorb nutrients. It can also acidify bodies of water, which can harm aquatic life such as fish and amphibians. Overall, acid rain can disrupt ecosystems and biodiversity.
Why does the sky does not fall?
The sky does not fall because there is no force pulling it down. The sky appears to meet the ground at the horizon due to the curvature of the Earth, but the sky is actually vast and continues on into space. Additionally, gravity keeps objects like the Earth and the sky in their respective places.
What is the average rainfall for the ponds and lakes biome?
The average rainfall for ponds and lakes biome varies depending on the region and climate. However, these biomes typically receive a moderate amount of rainfall, which is necessary to maintain the water levels in the ponds and lakes.
What is the wind speed of a flash flood?
To calculate the wind speed of a flood:
Lets say D stands for the depth of the flood in meters,
and G is the speed of gravity, which is 1471/150 or 9121/150.
The land speed of the flood would be the square root of D and G.
Multiply by 900/463 to convert from meters per second to air or nautical miles (knots).
So then, the equation for it is:
knots = sqrt(D * 1471/150) * 900/463.
How do you calculate runoff in a water cycle?
To calculate runoff in the water cycle, you need to consider factors such as precipitation, infiltration, evaporation, and soil composition. Runoff is the water that flows over the land surface and eventually into rivers, streams, and oceans. You can estimate runoff by subtracting the amount of water that infiltrates the soil or evaporates from the total precipitation. Factors like slope of the land, vegetation cover, and human activities can also affect the amount of runoff.
What are two changes in weather patterns caused by el nino that can cause disasters?
El Niño can cause increased rainfall leading to flooding and mudslides in some regions. It can also lead to drought conditions in other areas, resulting in crop failures, water shortages, and wildfires.
5 inches of rain equals how much snow?
1" of rain is roughly 10" of snow, depending on conditions. So, 5" inches of rain would be 50" of snow or 4' 2".
Where and when was the highest rainfall ever recorded?
Cherrapunji, 1290 meters above sea level, receives an annual rainfall of 12,700 mm. It once rained 22,900 mm in one season! It is located in India.
Also:
Mawsynram, Assam, India, annual average rainfall (11,873 mm, 467.4")
When does the green flash happen?
The green flash is a rare optical phenomenon that occurs just after sunset or just before sunrise, when the top rim of the sun briefly turns green as it touches the horizon. This happens because the Earth's atmosphere acts as a prism, separating light into its different colors. The green flash is most commonly observed over bodies of water with a clear, unobstructed horizon.
How are hailstorms and floods alike?
Hailstorms and floods are both severe weather events caused by atmospheric conditions. Hailstorms produce large hailstones that can cause damage to property and crops, while floods occur when an excessive amount of water accumulates in an area, leading to overflowing rivers, streams, and drainage systems. Both hailstorms and floods can result in significant destruction and pose risks to human safety.
Tropical rainforest
Explanation...
Tropical rainforests are warm, wet environments typically located near the equator. They can receive as much as 400 inches of rain per year. The temperature remains warm (70°F to 85°F on average) all day long and year-round. Tropical rainforests produce 40% of the Earth's oxygen.
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Heaps of rain clouds are called?
Cumulonimbus clouds are what heaps of rain clouds are called. Vertical clouds are the heaped up ones, so their names include the root " cumulus." The big, towering storm clouds are called cumulonimbus.
How long does it take a rain drop to hit the ground in a rainforest?
It takes at least 10 minutes to reach the forest floor in a rain forest because the canopy is like a giant umbrella.
What area in Oregon gets the least amount of rain?
Eastern Oregon, particularly the region known as the rain shadow of the Cascade Range, receives the least amount of rain in the state. Places like Bend and the high desert areas get significantly less rainfall compared to the western part of the state.
True or False Air Pollution is a sudden change in the acidity of a stream or lake?
False acid shock is a sudden change in the acidity of a stream or lake.
Clouds produce rain through a process called condensation. Water vapor in the air condenses into liquid water droplets, which then combine to form clouds. When these droplets become heavy enough, they fall to the ground as precipitation, such as rain.
What happens to the air of low pressure areas that leads to warm and wet weather?
Air in low pressure areas rises, causing it to cool and expand, leading to condensation and ultimately the formation of clouds and precipitation. Warm air from the surrounding areas is drawn into the low pressure system, which tends to be moist and results in warm and wet weather conditions.
A flood path is the route that floodwaters take as they flow across land during a flood event. It typically follows natural valleys, streams, or rivers, and can also include low-lying areas that are prone to flooding. Understanding flood paths is important for predicting and managing flood risk.
Which is accurate about monsoons?
Monsoons are generally good for india
Rice farming responds well to heavymonsoons
landslides and floods can occur on a large scale during monsoons
A weak monsoon season can lead to drought and starvation.
What is Run- off from the water cycle?
its rain water that flows over mountains, hills, and plains as well and with it it takes rocks and other small sediments into a lake or river.
A device for protection from rain?
An umbrella is a common device used for protection from rain. It typically consists of a collapsible canopy supported by a frame, which can be opened to shield against raindrops.
The long downpour was caused by a lengthy flow of warm, moist air that came from the Azores in the mid-Atlantic. This kind of airflow is common in the UK in the autumn and the winter, and is known as a 'warm conveyor'. The warmer the air is, the more moisture it can hold.
The ground was also already saturated, so the additional rain flowed as surface run-off straight into the rivers.
The steep slopes of the Cumbrian Mountains also helped the water to run rapidly into the rivers.