An arid desert looks like it s all sand, so why are there oases?

Oases are unexpected sources of water in the desert. This water provides much-needed relief to people and animals in the desert and promotes plant growth. This isolated vegetation is often the way oases are identified.

Animals also often find shelter in oases, feeding on the surrounding plants and drinking water. If the oasis is large enough, there may also be human settlements nearby. How was the oasis formed?

Oases are formed when an underground aquifer or river reaches the surface through natural pressure or artificial wells.

Scientists have also found that thunderstorms are responsible for the formation of some oases and**. Thunderstorms bring large amounts of rain that is trapped in air pockets in a layer of impervious rock or collects in volcanoes, underground faults, and levees. How did plants start growing in the desert?

This is where migratory birds play a key role. Migratory birds are attracted to water as they cross the desert. When birds congregate in this place, they scatter their eaten seeds along their migration routes.

Because oases provide fertile land for otherwise barren lands, humans have been drawn to these places for hundreds of years. Once a settlement appears in the oasis, the people who live there must carefully control their water consumption. This is usually done through wells and irrigation systems.

By irrigating the land, residents were able to produce and harvest several crops, including cotton, olives, figs, dates, corn, wheat, oranges, and apricots. Dates are particularly useful in agriculture. This is because date palms grow taller than other plants, forming an upper layer that provides shade to the lower plants.

This shade prevents the sun from burning other crops and helps prevent scarce moisture from evaporating quickly.

One of the biggest threats to the Oasis environment is actually its location. The sand from the desert flows into the water source of the oasis, both polluting the available water and filling it up. Too much sand around crops can also reduce the amount of essential nutrients in the soil, which can reduce yields.

In addition, overuse of irrigation water threatens the quality of water by reducing the amount of water available for other purposes. The date palm mentioned above also helps to prevent sand pollution. Communities often plant these trees on the outskirts of the oasis to protect them from strong winds and blowing sand.

Because there may be groundwater in the desert, or there may be glaciers around the desert, the water melted by the glaciers flows into the desert to form an oasis.

1.For example, there are tall Tianshan Mountains and Kunlun Mountains on the north and south sides of the Tarim Basin in China, and there are a large number of mountain glaciers distributed on the mountains, and the water after these glaciers melt flows to the foothills to form an oasis. 2.

It may be that it comes from groundwater, shallow groundwater is very scarce in arid areas, mainly deep groundwater formed earlier, if there is a fault line somewhere, there is deep groundwater outcropping, it is easy to form an oasis.

This is because there is a part of the desert where water can be gathered, and as long as there is a water source that can meet the conditions of the plant market, there will be oases.

We pour a glass of water in the desert and on the desert, except for the evaporated part, most of the water flows down the sand and gravel into the ground, becoming what we call groundwater. Groundwater will also collect in one place with gravity, when it reaches a low-lying desert areaWater gushes out of the sand and gravel, creating an oasis in the desert.

If groundwater hits impervious rock formations, it will gradually flow into low-lying areas in the desert. The low-lying areas of the desert accumulate groundwater over a long period of time, and then this groundwater accumulates more and more, and slowly seeps out of the ground to form a certain area of lakes. As the saying goes, where there is water, there is life, and slowly green plants appear around these lakes, forming an oasis in the desert.

Most desert oases are formed by flowing water from the mountains, so they are usually found in places not far from the mountains.

This is just one way for the formation of oases in the desert. There are also places where it rains a lot in the distance, and the rainwater seeps into the ground and merges with these underground riversWhen it flows through the low-lying areas of the desert, it often gathers into a certain area of water and seeps out of the ground to form an oasis. This, combined with some crustal movements, has caused a certain degree of fracture in the impervious rock formations beneath the desert.

Groundwater flows out along the cracks in the rock formations, and then collects into the low-lying areas of the desert to collect a certain amount of water, and then slowly rises to the surface to form an oasis.

In the Simpsons Desert in Australia there is a vast red desert with beautiful scenery, and the white desert is distributed in the Lucent Basin in the southern United States, which is a silver world; The Karaku Desert in Central Asia is black, and the Arizona Desert in the United States is even more exciting. It comes in many colors like red, yellow, purple, blue, and white. It's really colorful.

In the sun, the sky also reflects brilliant colors in some inland areas.

Due to the scarcity of precipitation and the high evaporation than precipitation, the climate is dry and the temperature is low, making it difficult for plants to grow. Over time, a desert of yellow sand and no green has been formed here. There are almost no people living here, and there are wind-eroded mushrooms and wind-eroded castles that are blown by the strong winds of the Liusha River.

However, the desert is not inhospitable everywhere, and in some places, there are also small rivers and flowing waters, as well as sights of green trees on both sides of the river.

As a result of changes in the earth's crust, impervious rock formations are fractured, causing groundwater to flow along the cracks into low-lying desert areas and wash out of the ground. With water in this low-lying area, all kinds of organisms emerge, develop and reproduce. Most of the oases are backed by high mountains and face the desert as there is an abundance of water.

Most of these mountains are high and covered with snow, and the snow melts in the summer to form riversThe river flows through the desert area and seeps into the ground in the desert to become groundwater, providing an abundant source of water for the formation of oases.

Because the snow and ice in the mountains melt and flow down the slopes naturally, passing through the desert in the middle, deep into them, thus forming groundwater, which is why oases exist; A desert oasis is a place where there is a lot of rain, converging with other rivers, passing through low-lying areas, where water sources are formed, thus forming oases, and the movement of the earth's crust causes the rock formations to break and the groundwater flows out through the cracks, thus forming the oasis.

Because there are also some water sources in the desert, when these water sources are more lush, some vegetation will appear, so oases will be formed. Desert oases are formed because of the presence of groundwater in the desert, and these groundwater breeds these vegetation, so the desert oasis is formed.

Because there is water in this place, plants will multiply in this place, and there will be oases, which are caused by groundwater.

Before reaching the oasis, the water must travel a long distance below the surface through the aquifer. An aquifer is an underground system of permeable rocks. When the underground aquifer is damaged, or the land above it is eroded and worn away, the blisters rush to the ground, forming an oasis on which the peoples and animals that actually live in the desert depend on the continuous flow of water all year round.

Why are there oases in the desert ? Where an oasis is found, an abundant source of water is also to be found, whether it is a river or an underground water source. The oases in the desert are mostly backed by high mountains and facing the desert.

The snow and ice in the mountains melt into snow in the summer and merge into rivers. When the Zhipi River flows on the high mountains, it carries a large amount of sediment and rushes down due to the steep terrain and turbulent current. When the river leaves the slope, the terrain suddenly becomes flattened and the flow rate drops sharply, resulting in sediment deposits.

The sediment deposited at the bottom of the mountain near the estuary, and the water seeps and evaporates along the way, so many rivers in desert areas quickly hide in the sand and gravel underground, becoming underground water flows. When people think of the desert, they think of the endless yellow sand and death-like desolation. However, in China's Taklamakan Desert, Hami and Turpan and other places are everywhere green, densely populated, rich in products, cantaloupe, Turpan grapes and so on are famous at home and abroad, and are called "oases" by people.

qid=7006031100044 2007-09-09 16:32:44 Added:

vvschool/why/why_2#

An oasis is a geographical term that refers to an isolated and fertile area covered with vegetation in an environment surrounded by desert terrain. The common water source** is that the water is irrigated by underground springs or artificially dug wells, and the water is lowered to the ground in a distant rainfall area, and then passes through the desert through a permeable underground sandstone layer, and returns to the surface at the oasis to be used. The oasis is very important for the life of the desert area, not only most of the desert residents live around the oasis area, but also the business travel and the ** network are often developed along the oasis, because the oasis is an important food and water supply station.

In the Sahara Desert in the northern part of the African continent, 2 3 percent of the population lives in the oases scattered in the desert.

Because there is groundwater under the desert (sorry

I don't study geography.

So I don't know the details)

Oases are usually caused by a year-round source of water**, commonly from underground springs or artificially dug wells for irrigation, where the water descends to the ground in distant rainfall areas and then dives underground through permeable underground sandstone layers!

Reference: Dictionary!

In the middle of this vast desert lies a huge oasis with seven lakes of all sizes scattered around it, forming a rare beautiful and bizarre landscape: bounded by a road, on one side is an endless desert, where not a single inch of grass grows, making people despair;

On one side, the water is rippling, the grass and trees are verdant, and it is a scene full of life. The completely different natural landscapes are perfectly blended here, and they complement each other, which is truly breathtaking.

There is a wonder in the endless desert, and that is the existence of oases. Walking in the yellow sand, as long as you lose your way, it is very likely that you will not be able to walk out of the desert, and the oasis is like the source of life, which will make you find a little hope of life on the edge of despair. But why are these two very different landscapes, desert and oasis, together?

In the drought and little rain bare. In the great desert, you can also find an oasis full of water and grass and green trees, which is full of vitality. How did this oasis come about?

It turns out that the snow and ice on the high mountains melt in the summer, and rivers flow down the slopes. When the river flows through the desert, it seeps into the sand and becomes groundwater. Groundwater gushes out of the ground when it flows down impervious rock formations to low-lying areas of the desert.

In addition, rainwater from afar seeps into the ground and can also flow into the low-lying areas of the desert in confluence with groundwater. Or due to changes in the earth's crust, impermeable rock formations are fractured, causing groundwater to flow along the fissures to low-lying desert areas and wash out of the ground. When water is available in low-lying areas, various organisms emerge, develop, and multiply, thus forming an oasis.

An oasis in the desert with abundant water and fertile soil, suitable for crops and other plants. Oases often form strange landscapes.

Desert mainly refers to a barren area where the ground is completely covered with sand, plants are scarce, rain is scarce, and the air is dry. The desert is also a sand curtain, a dry area with little water and few plants. [1] Deserts are mostly sandy beaches or dunes, and stones under the sand often appear.

Some deserts are salt flats with no vegetation. Deserts are usually aeolian landforms. There are sometimes valuable mineral deposits in the desert, and many oil reserves have been discovered in recent times.

The desert is inhabited and resources are relatively easy to exploit. The desert has a dry climate and is also a happy place for archaeologists, where many human artifacts and early fossils can be found. Why are there oases in the desert?

In the great desert with little rain and dry water, you can also find oases full of water and grass, trees and vitality. What formed this oasis? It turns out that the snow and ice in the high mountains melt in the summer and flow down the slopes to form rivers.

The river flows through the desert, seeps into the desert and turns into groundwater. Groundwater flows down impervious rock formations into the ground, or it can merge with groundwater to flow into low-lying areas of deserts. Or because of changes in the earth's crust, impervious rock layers break down, and groundwater flows along fissures into low-lying desert areas and washes out of the ground.

The low-lying land is watery, and all kinds of organisms emerge, develop, and reproduce, thus forming an oasis.

In the arid desert with little rainfall, you can also find oases with overgrown water and grass and green trees. This is because the snow and ice in the mountains melt in the summer, flowing down the slopes to form rivers. When the river flows through the desert, it seeps into the sand and becomes groundwater.

This groundwater gushes out of the ground after flowing along impervious rock formations to the low-lying areas of the desert.

In addition, rainwater from afar seeps into the ground and can also merge with groundwater to flow into the low-lying areas of the desert. Or due to changes in the earth's crust, impermeable rock formations are fractured, causing groundwater to flow along the cracks to low-lying desert areas and wash out of the ground. When water is available in this low-lying area, various organisms emerge, develop and reproduce, thus forming an oasis.

Oases in the desert are suitable for crops and other plants, often creating strange landscapes.