The beach is a flat ground distributed along the coast, which is made up of loose sediments or gravel. Coastal accumulation landform type. Generally distributed above the average low tide line, it extends upward to the zone where the composition or topography has changed significantly, that is, the high tide line, also known as intertidal zone or seashore. According to the size of constituent particles, beaches can be divided into gravel beaches, coarse beaches and fine sand beaches. China Dalian Tiger Beach, Qingdao Beach, Beidaihe Coast, Hainan Island and Fujian Changle Coast are mostly fine beaches. Beach is the product of comprehensive action of waves and their derived coastal currents. The nearshore waves are introduced into the nearshore shallow water area. Due to the friction of the seabed, the wave front becomes steeper, the wave trough becomes slower, and the trajectory of water quality points presents a reciprocating flow. The inflow speed to the shore is usually higher than the offshore backflow speed, resulting in the net transport of bottom sediments to the shore, which is carried to the shoreline by the upwelling of shore waves. Generally, the upper beach material is thick and the beach slope is large; Fine blanking, flat beach slope. Due to the repeated action of waves, scouring and backflow, beach sand becomes the best sediment for sorting.
Colored beach? The moon? Red beach on the beach
Compared with the black sand beach, the red sand beach is even rarer, only in Maui and santorini.
If the darkness of the big island reminds people of hell, Maui is brick red and as barren as the moon. Although Maui is also a volcanic island, because there is no volcanic activity for many years, there are few black volcanic rocks, and the rocks on the surface have begun to weather into soil. The black magnetite in volcanic rocks has been oxidized into brick-red iron compounds for a long time, so the soil here shows a striking red color. There are some hills on the island, and there are not many plants on them. Standing on the top of the mountain, I can only see pieces of bare red circular deposits. If there is no blue sky and white clouds, it is really not much different from the surface of the moon. The plants here are particularly precious because they are not native, but come from several continents. It is not easy for plants to take root here, so that almost every wild plant in Maui National Park will be escorted by ecological protection volunteers. The specific work of these volunteers is: beware of artificially raised pigs slipping out of the pigsty and arching the roots of plants. In their words:? If the pig arches a hole in the land, it will not only endanger the survival of plants, but also cause water accumulation when it rains, thus providing conditions for the breeding of mosquitoes and flies and destroying the fragile ecological chain of Maui. ?
Keha Lu Lu Red Beach is located in such a strange place. Its location is very secret and the road is difficult to walk. Next to the red beach, I saw a crimson rock mountain, which is the source of red sand grains on the red beach. However, because this red volcanic rock is similar to pumice in structure and light in texture, its debris can only be deposited in the place where the waves are gentle. Because of this, the red beach has not been violently polished by the waves, and the sand is rough, so it is best to walk on it with shoes. According to local people, this red beach is still growing. With the passage of time, Hongyan Mountain is further eroded, and the sediments on the red beach will increase. What we see today may be just the tip of the red beach in the future.
Baishatan
If you sing the above song to people who grew up in Rio de Janeiro, Brazil, they may be confused. In their view, the color of the beach should be flawless. Brazilians often say: God created the world in six days and Rio on the seventh day? Then on the seventh day, God will create the white sand beach in half the time. You may not believe it, but in Brazil's second largest city, you can see white beaches without leaving the city.
I went to Rio twice and lived next to the famous Copacabanabeach. It is the most famous beach in Rio, 4.5 kilometers long and several hundred meters wide. My local friend once proudly told me that Copa cabannes is the most beautiful white beach in the world. ?
The sea here is not gentle, and there are often white waves and magnificent scenes, which are really different from swimming pools. Once, as soon as I went into the sea, I met a wave and hit my back directly on the beach. Not only did I not have the strength to fight back, but I was also rubbed back and forth by the waves on the beach. I will never forget this experience. Later I thought, this is the experience of every grain of sand on this beach for many years.
Many years ago, there were no white beaches here, only white rocks. The waves constantly hit the coast with great energy, destroying the rocks. If there are cracks or joints in the rock, the destructive power of the waves will be greater? It impacts the rock and compresses the air in the crevices of the rock at the same time, and then the pressure of seawater retreating drops sharply, which will produce explosive force. This process is repeated, and the white rocks are constantly collapsing and breaking. The fragments of the rock were carried back by the waves, constantly colliding and polishing each other, and finally piled up in the right place. But their suffering is not over yet. What awaits them is repeated scouring and elutriation year after year. So today, Cobacabana's sand is particularly delicate and crystal clear, just like sugar.
Beach volleyball, blue sky, blue sea, sunshine and beach, is a unique popular sport in the world-beach volleyball, which is praised for its strong competitiveness, unique artistry, appreciation and interest. 265438+the most outstanding sport in the 20th century? . Athletes and spectators face the blue sky and blue sea overhead, their ears face the sound of waves and their feet face the soft beach. This poetic realm naturally integrates man and nature. People throw themselves into the embrace of nature, edify their bodies and minds, entertain and keep fit, which is the perfect combination of man and nature.
Beach volleyball originated in the 1920s and first appeared on the beaches of California, USA. At that time, people came to the seaside to escape the heat, just as an entertainment to relax on the beach. In 1930s, the popularity of beach volleyball has reached a certain scale. When summer comes, beach volleyball can be seen everywhere on beaches in America and Europe. At this time, people are no longer satisfied with just taking it as a leisure and entertainment activity, and started a competition with different rules for three, four and six people. 1947, the men's beach volleyball doubles competition was born. From 65438 to 0989, FIVB founded the men's beach volleyball doubles competition, which was held in Brazil, Italy and Japan respectively. The first championship attracted many excellent beach volleyball players from all over the world and achieved great success. Through this competition, FIVB not only listed beach volleyball as an official event, but also determined that its highest-level events were the World Beach Volleyball Championship, the World Beach Volleyball Grand Slam and the World Beach Volleyball Tour. At this point, beach volleyball has unified and accurate competition rules, and the competition adopts the double-loss elimination system (since 2002, the competition system has changed to the first stage of grouping and single cycle, and the top two teams have entered the second stage of single-loss elimination system). Athletes must register in advance and rank points through competitions. With the unremitting efforts of FIVB and its 2 12 member associations, beach volleyball has been widely popularized and developed rapidly in recent ten years. According to statistics, the World Beach Volleyball Tour has increased from 5 stops per year to 0/3 stops for men and 0/2 stops for women. At present, hundreds of countries and regions in the world have established beach volleyball organizations and officially launched beach volleyball, with nearly 60 million athletes engaged in beach volleyball. Every year, more than 80 countries and regions broadcast or relay beach volleyball matches on TV, with more than 500 million viewers watching TV. These data show that beach volleyball is not only a new hot spot in sports program reports, but also has become one of the most popular summer sports in the world as a mass sport. We should thank those volleyball organizations and athletes who are committed to popularizing and popularizing this sport. Their excellent work paved the way for this new and popular sport to enter the Olympic Games.
From 65438 to 0992, beach volleyball first appeared as a performance event in Barcelona Olympic Games. On September 24th, 1993, beach volleyball was confirmed as an official Olympic event. At the 1996 Atlanta Olympic Games and the 2000 Sydney Olympic Games, beach volleyball was loved by fans and sports fans for its unique charm, and was praised as? 2/kloc-one of the most outstanding sports in the 20th century? . After the Sydney Olympic Games in 2000, Mr. Samaranch, then president of the Olympic Committee, said? The beach volleyball matches of Atlanta Olympic Games and Sydney Olympic Games were a complete success. Beach volleyball is one of the best events in the history of the Olympic Games. Beach volleyball, with its superb sports competitiveness, excellent personal expression ability and youthful and novel form, integrates the audience into the competition and makes them a part of the competition. Therefore, beach volleyball has gained its due position in the Olympic plan. Beach ball has added new ways and brought new ideas to the Olympic movement. ? In the current beach volleyball rules, the beach volleyball competition venue is 8? 16m, the net height is the same as that of indoor volleyball. On the 64-square-meter playing field, two athletes have to complete various technical actions such as serving, padding, passing, spiking, blocking and defending, which are jointly completed by six athletes in indoor volleyball. Beach volleyball requires athletes to have good physical fitness, extraordinary skills, excellent quality and amazing perseverance. Therefore, people who are familiar with and understand beach volleyball proudly claim that beach volleyball is not only a high-level competitive game, but also a highly ornamental sport integrating leisure, entertainment and fitness.
As long as you take adequate sun protection measures, you can go to the seaside in hot summer and absorb vitamin D produced by sunlight, which is good for your health. However, what about the beach? Designate? Barbecue, one of the activities, is not very healthy. Barbecue food is inseparable from sausages, chicken wings and other meats, which contain extremely high calories. And the health value of food after barbecue will be lower.
How can we make beach activities healthier? The secret is to do more kinds of sports. Besides swimming, beach volleyball, jogging in the water and building sand are also good choices.
The first introduction is jogging in the water. Its massage function can eliminate fatigue and make legs slender. When running in water, your limbs swing back and forth like running on land. Because the resistance in water is much greater than that in air, jogging for 45 minutes is equivalent to jogging on land for 2 hours, which can consume up to 980 calories.
Another sport is beach volleyball. Beach volleyball is the first popular sport in foreign countries. In Hong Kong, only beaches such as Discovery Bay have these facilities. This sport, which is different from the traditional form of volleyball, first appeared in California. It was originally designed for family members to play with. At 1996? Upgrade? For the Olympics. This sport is suitable for both men and women. As long as you play beach volleyball with friends 1 hour, you can consume 180 calories.
Perhaps you can't imagine that building sand can also consume a lot of heat. Whether building a castle or digging a deep pit at will, as long as you keep digging and piling 1 hour, you can consume 148 calories.
The above three activities are dynamic and static. Go to the seaside, even if you can't swim, you won't worry about not having a fitness program.
Look at how the beach is formed, look at:
1. How was the Gobi Desert formed?
2. How did the red beach come into being?
3. How did the waterfall form?
4. How are coral reefs formed?
5. How did this lake come into being?