精卫填海英语作文100词四年级下册

精卫填海英语作文100词四年级下册
全文共6篇示例，供读者参考
篇1
Title: The Amazing Land Reclamation Project
Have you ever wondered what happens to all the trash and rubble from construction sites? Well, let me tell you about this incredible thing called land reclamation!
Last year, our class went on a field trip to the harbor. We saw these huge ships carrying loads of dirt, rocks, and construction debris. At first, I thought they were just dumping it all into the sea, which would be really bad for the environment. But then our teacher, Mrs. Thompson, explained that they were actually using this material to create new land!
Can you imagine that? Making more land where there was once just water? It's like magic! Mrs. Thompson told us that this process is called land reclamation, and it's been going on for centuries in many coastal cities around the world.
The way it works is fascinating. First, they build a huge wall or barrier out in the water, using rocks and concrete. This wall
creates an enclosed area where they can start dumping all the soil, rubble, and other materials. Slowly but surely, the area gets filled up, and voila! New land emerges from the sea!
But why would anyone want to do this, you might ask? Well, there are actually several really good reasons.
One of the main reasons is to create more space for cities to grow. You see, many big cities are located near the coast, and they're running out of room on land. By reclaiming land from the sea, they can build more houses, offices, parks, and other facilities without having to cut down forests or take over farmland.
Another important reason is to protect coastlines from erosion and flooding. The sea can be pretty powerful, and it's always trying to eat away at the land. By building barriers and creating new land, we can help keep the coastline stable and prevent it from being washed away.
Land reclamation can also be used to create new ports and harbors for ships. This is super important for cities that rely heavily on maritime trade and transportation.
But you know what's really cool? Some of the reclaimed land areas have been turned into amazing public spaces like parks,
beaches, and even entire neighborhoods! Imagine living on land that used to be part of the sea!
During our field trip, we got to see one of these reclaimed land areas up close. It was a beautiful park with walking trails, playgrounds, and even a little lake. Mrs. Thompson told us that the lake was actually part of the original harbor before it was filled in. How incredible is that?
I can't wait to see what other land reclamation projects will happen in the future. Who knows, maybe one day we'll have entire cities built on land that used to be underwater! The possibilities are endless, and it's all thanks to the amazing power of human ingenuity and hard work.
So the next time you see a construction site or a pile of rubble, don't just think of it as trash. Think of it as the building blocks for creating new land and expanding our horizons. The world is constantly changing, and land reclamation is one of the ways we can adapt and grow along with it.
篇2
Land from the Sea
Have you ever thought about how we get new land? It's not like there are land factories that can just make more of it. The amount of land on Earth is limited since we live on a planet. But what if I told you that humans can actually create new land from the sea? It's called land reclamation and it's a fascinating process!
Land reclamation means taking areas that are covered by water and turning them into dry land that can be built on. This allows places with a lot of coastline, like cities on the ocean or big lakes, to expand their usable land area. The new land can then be used for things like housing developments, industrial areas, airports, ports and harbors, and public parks or recreation zones.
There are a few different methods used for land reclamation projects. One way is to build a big seawall or embankment wall around the area of water you want to claim. Huge amounts of sand, rocks, and soil are then brought in to fill up the area within the seawall until it becomes dry land. Another approach uses a technique called hydraulic fill, where sediment from the seafloor is suctioned up and sprayed into the area being reclaimed to slowly build it up over time.
Some of the biggest and most amazing land reclamation projects in the world have happened in places like Singapore, Hong Kong, the Netherlands, and Dubai in the United Arab Emirates. The Palm Jumeirah in Dubai is one of the largest artificial islands ever created – it has added an incredible 520 hectares of land into the Persian Gulf! It was made by dredging millions of tons of rock and sand from the waters of the Gulf and spraying it into a palm tree shape. There are now hotels, houses, parks, and marinas all built on top of land that used to be open sea.
In Hong Kong, the process of land reclamation from the surrounding waters has been going on for over 150 years due to a shortage of flat land to build on. Hong Kong has reclaimed around 70 square kilometers from the sea so far, which is about 7% of its total land mass! Huge areas like the neighbourhoods of Quarry Bay and Western District were former seafloors turned into dry land through reclamation.
The Netherlands is another place famous for its land reclamation efforts. About a quarter of the country's entire land area has been reclaimed from the North Sea or from lakes and marshes over centuries of work. The Dutch are experts at this process due to around a third of their country sitting below sea
level, protected by an extensive system of dykes, dams, and storm surge barriers. Their constant battle against flooding from the ocean has led to very advanced land reclamation techniques.
While land reclamation allows densely populated coastal areas to create more usable space, it does have some potential downsides too. Filling in parts of the sea or lakes can damage marine ecosystems and habitats for fish and other sea life. The dredging and construction work also causes pollution and releases sediments that reduce water quality. Changes to tides, currents, and water flow patterns can lead to beach erosion in other areas too.
However, when done responsibly with environmental safeguards in place, modern land reclamation projects do their best to protect natural habitats and minimize any harmful impacts. Marine life conservancies, artificial reefs, and mangrove forests are often created as part of the reclamation to replace some of the affected ecosystems. Special measures are also taken to carefully manage the effects on tidal flows and currents.
At the rate the world's population is growing, building more housing and infrastructure will keep driving the demand for land reclamation, especially in densely populated coastal cities. With rising sea levels from climate change, some lower-lying areas
may eventually need to be reclaimed just to stay above water in the future. While it is an expensive and difficult process, land reclamation from the sea allows humans to push back against the constraints of geography and nature itself to create more urban areas, airports, farmland, and living space for our growing numbers.
What an incredible feat of engineering! Imagining all the work that goes into transforming submerged underwater areas into new stretches of dry, usable land is really mind-blowing. From the initial surveying and planning to the construction of seawalls and embankments to the massive hydraulic fill operations, it makes me have a new appreciation for some of the land masses we take for granted. The next time I
篇3
Land From the Sea
Have you ever looked out at the ocean and wondered what's underneath those deep blue waters? Well, I've been learning all about how people can actually build new land areas by filling in parts of the sea! It's called land reclamation and it's a pretty amazing process.
Land reclamation means taking an area of water like the ocean, a lake, or a river, and filling it in with soil, rocks, and other materials until it becomes dry land that you can build on. People have been doing this for hundreds of years in places all around the world.
One of the main reasons to reclaim land from water is to create more space for a growing population to live and work. Cities on islands or along coastlines can run out of land as more and more people move there. By reclaiming land from the sea, they can build new neighborhoods, business districts, parks, and other areas.
Singapore is a great example of this. It's a small island country in Southeast Asia with over 5 million people! Since it's so crowded on the main island, Singapore has reclaimed a huge amount of land from the seas around it. About one-fourth of Singapore's total land area is actually reclaimed land.
Another major use for reclaimed land is for transport links like roads, railways, and airports. Many coastal cities have built new airports on reclaimed land because they don't have enough existing space. Hong Kong's international airport, for example, is built entirely on an artificial island made from reclaimed land.
Ports and harbors are also commonly located on reclaimed land waterfront areas. Ships need a lot of space to load and unload cargo, so big ports require lots of land. By reclaiming more waterfront, existing ports can expand their facilities.
I think land reclamation is really cool, but it's not as simple as just dumping dirt into the water. A lot of careful planning and construction work is involved. Here's a basic overview of how it's done:
First, an area of the seafloor or riverbed is surrounded by a huge fence or wall made of rock or concrete. This encloses the area that will be reclaimed. Next, millions of tons of sand, soil, and rocks are brought in by ships and trucks and dumped into the enclosed area.
The dumped materials are compacted down firmly with heavy machinery. Layer by layer, the area rises up out of the water until it becomes dry land above sea level. Finally, the surface is covered with a top layer of high-quality soil or sand and landscaped for construction.
One of the engineering challenges is making sure the reclaimed land is stable and won't sink or erode away over time. The soil has to be compressed properly, and tough sea walls are built to protect against waves and currents.
While land reclamation creates valuable new space, it can also harm marine ecosystems like coral reefs, sea grass beds, and fish habitats. The reclamation work can release sediments that cloud the water and block sunlight. This can damage sea plants and creatures that need clear waters.
Because of environmental concerns, there are regulations about where and how much land can be reclaimed. An environmental impact study has to be done first. But even with precautions, reclaiming land inevitably destroys some natural coastal or marine areas.
In some places, land has actually been "reclaimed" from past reclamation projects! For example, old airports or ports built on reclaimed land have been re-converted into parks, nature areas, or even housing developments when they became obsolete.
Whether we need more space for housing, transport, or commercial uses, land reclamation will likely continue as populations grow around the world. To me, it seems like an incredibly amazing feat of engineering to take an area of open water and transform it into usable land.
The next time you go to the beach or lake, imagine what that view might look like 20 or 50 years in the future. Will there be newly reclaimed lands jutting out into the water? How will they
be used? Just one of many questions to ponder about our changing landscapes.
篇4
Land Reclamation: Making More Space for Us!
Have you ever wondered how we get more land for buildings, roads, and parks? It's not like we can just create new land out of thin air. Well, actually, there is a way we can make new land and it's called land reclamation!
Land reclamation is the process of creating new land from areas that used to be underwater, like the sea, a lake, or a river. It's kind of like magic, if you think about it. We take an area covered by water and through lots of hard work and cool machines, we turn it into dry land that people can build on.
One of the most common ways to reclaim land is by using something called land fill. This involves taking materials like sand, rocks, and soil and pouring them into the water until it's all filled up and becomes new land. It's sort of like making a really big sandcastle, but instead of sand, you use all kinds of materials.
Another way to reclaim land is by draining areas of water, like marshes or wetlands. Engineers build big pumps and
drainage systems to remove all the water, leaving behind dry land ready for construction.
You might be wondering why we even need to make new land in the first place. Well, there are a few reasons. First, some places like cities or islands simply run out of space for new buildings, roads, and parks as their population grows. By reclaiming land from the water, they can create more room for people to live and work.
Land reclamation also helps protect coastal areas from flooding caused by rising sea levels due to climate change. By building new land higher up, people and buildings are safer from getting flooded by the ocean.
Another cool use of reclaimed land is to create entirely new islands! Places like Singapore, Hong Kong, and Dubai have all made artificial islands by reclaiming land from the sea. These new islands can then be used for housing, airports, resorts, and even crazy things like artificial skiing slopes in the desert!
I think land reclamation is really amazing. It shows how humans can use our brains and technology to overcome limitations of space and reshape the very land we live on. Who knows, maybe one day I'll even get to live or work on a totally
man-made island! Just imagining all the possibilities makes me excited for the future.
So the next time you see a big construction project happening near the water, it might just be another land reclamation project underway, creating new land for us right before our eyes. How cool is that?
篇5
Reclamation from the Sea: A Modern Marvel
Have you ever wondered where all that new land comes from when they build new cities and developments by the ocean? It's not magic – it's something called land reclamation! Land reclamation is the process of creating new land areas by draining areas of water or extending existing land out into the water. It takes what used to be part of the sea, lake, or river and turns it into dry land that can be built on. Pretty cool, right?
The idea of reclaiming land from bodies of water has been around for a very long time. Some of the earliest examples date back thousands of years to ancient civilizations in the Middle East. They would drain marshes and wetlands to create dry, arable land for farming and living. As time went on, the practice spread to other parts of the world like Europe and Asia.
In the modern era, land reclamation has become even more advanced and large-scale. With huge construction projects, countries are able to claim vast new stretches of land from the sea to build cities, airports, ports, and other developments. Some of the largest and most famous examples are Singapore's massive expansions, the Palm Islands in Dubai, and Hong Kong's new territories.
So how exactly does this modern land reclamation work? It starts with designated areas of shallow coastal water being enclosed with huge rock walls or barriers. Powerful machinery then pumps out all the water from the enclosed area. Once drained, layers of sand and rocks are piled up to form a solid base. Soil is brought in on top to make the new land suitable for construction. It's an incredible engineering feat!
When done responsibly, land reclamation provides innovative solutions to the problem of limited space for growing populations in coastal cities. The增减吞吐新的空间,满足城市不断扩张的需求。

Rather than overcrowding existing areas, "reclaimed" extensions allow for thoughtful development of housing, businesses, transportation hubs and more.
Singapore is a fascinating case study in the bold possibilities of land reclamation. Once a tiny island nation severely lacking in
territory, it has persisted over decades to reclaim over 130 square kilometers from the sea! What used to be water is now a flourishing extensions filled with residential towns, the massive Changi Airport, port facilities, and more. With over 90% of residents living on reclaimed land, Singapore shows how this process can radically optimize usable space.
As amazing as these massive reclamation projects sound, you might be wondering - is slowly shrinking the world's oceans cause for concern? While sea levels have risen slightly due to the displacement of reclaimed land masses, the effect is actually negligible compared to other contributing factors to sea level rise like climate change and melting ice caps. That said, there are still important regulations in place to assess and limit major reclamation projects depending on their scale and location.
Whether marveling at Dubai's palm-shaped artificial islands or picturing how millions live on reclaimed land in Hong Kong, it's fascinating to think about how human ingenuity has allowed us to extend civilization's boundaries into the seas themselves. While it's an incredible feat of engineering, care must always be taken to balance development with environmental preservation.
For me, studying these mind-blowing land reclamation projects makes me excited about the future of urban planning
and sustainable growth. Who knows what bold new design we'll see cities take shape next? With disciplined applications of reclamation technology, the horizons -.
篇6
Land Reclamation: Turning the Sea into New Land
Have you ever looked out at the ocean and wondered what's underneath all that water? Well, in some parts of the world, people are actually turning the sea into new land! It's called land reclamation, and it's a really cool process. Let me tell you all about it.
Land reclamation happens when soil, rocks, or other materials are used to create new land areas by filling in water bodies like the ocean, lakes, or rivers. This new land can then be used for building things like houses, schools, roads, parks, and even entire cities! Isn't that amazing?
One of the biggest reasons countries do land reclamation is because they need more space for their growing populations. Some places, like Singapore and Hong Kong, are very small islands with a lot of people living there. By reclaiming land from the sea, they can create more space for everyone.
Another reason is to build new ports and harbors for ships. Big cargo ships need a lot of space to load and unload goods. Land reclamation allows countries to expand their ports so more ships can come in.
But how exactly does land reclamation work? Well, first an area of the sea is marked off with strong barriers called dykes or seawalls. Then, sand, soil, and rocks are brought in by trucks and dumped into the area until it's completely filled up above the water level. Woah!
In some cases, instead of filling it all the way, they'll just build up a surface on top of the water using a technique called land reprovisioning. Either way, once the new land is formed, it has to settle and compact for a while before any construction can happen.
One of the largest land reclamation projects ever was in the Netherlands, a country that's mostly flat and low-lying. Over many decades, they reclaimed huge amounts of land from the sea to protect against flooding and create more space.
Singapore is another place that's really good at land reclamation. Did you know that around one-fourth of Singapore's total land area is actually reclaimed from the sea?
That's like adding 20 new islands! They use the new land for housing, industries, airports, and more.
Some people worry that land reclamation might cause erosion along nearby coastlines too. And if the new land isn't compacted properly, it could sink or get damaged over time. Yikes!
But many countries feel the benefits of having more usable land outweigh the risks and costs involved. As long as it's done carefully while trying to limit environmental harm, land reclamation provides growing nations with valuable extra space.
Whether it's housing, transportation, recreation or commercial use, that brand new land created from the ocean opens up so many opportunities. Who knows, maybe the school you're sitting in right now is built on reclaimed land! How cool is that?
The next time you visit the beach, just look out over that vast expanse of water and imagine an entire new landmass rising up from it. With human ingenuity and hard work, the impossible can become possible. The sea is no longer the limit!。