LAKES

[Virtual Presenter] Good morning everyone, Today I would like to present to you the informative presentation on lakes by Shivansh Koundal, a student of 9th standard from our school. The presentation covers topics such as the formation of lakes, example lakes from around the world, physical characteristics of lakes and how fresh water lakes are formed along with examples of fresh water lakes in India and its benefits. So, let's dive right into the presentation..

LAKES.

[Audio] Lakes are hugely significant, serving a critical role in the water cycle across the globe. They offer habitats to flora and fauna, serve as a source of drinking water for people and animals, and also generate stunning and tranquil landscapes. These bodies of water are a component of all ecosystems and are a necessary link between the land and oceans. Lakes vary widely from small to large in their dimensions and forms..

[Audio] Lakes are an important part of the world's geography, found in high latitudes and mountainous regions, particularly in Canada, where half of the world's lakes reside. Besides being a habitat for various aquatic organisms, lakes help to regulate water levels, and provide a valuable source of natural resources..

[Audio] Lakes are an integral part of geography, so let us try to understand how they are formed. There are several ways in which this can be done, such as through the erosion and deposition of glaciers, shifts in the Earth's crust, craters of some extinct volcanoes, landslides and asteroid faults. All of these phenomena can contribute to the formation of different types of lakes..

Glaciers.

[Audio] I will be discussing lakes today. Glaciers were an integral part of the formation of the Great Lakes, which include Lake Superior, Lake Huron, Lake Michigan, and Lake Ontario. These lakes are essential for providing abundant fresh water to the states that surround them. Furthermore, these lakes are also habitats for numerous species of birds and fish, making them an integral component of the ecosystem..

[Audio] Good morning Students. Today we are talking about Lake Titicaca, the highest lake in the world. Located in South America, this lake was formed by the melting of ice and snow from the Andes mountains. The folding of the mountains formed cracks in the earth's crust, which created a deep basin, and the melted snow and ice filled it up. It's an incredible example of the power of nature..

[Audio] The lake Taal is located on the island of Luzon in the Philippines. It is considered to be a freshwater lake, sitting in the middle of a crater of an ancient volcano. The lake itself is about 2.5 miles wide, but the entire volcanic crater is 28 miles in diameter. It is known for its unique features, like the unusual lake depth which ranges from 60 to 250 feet deep..

[Audio] Alabad lake in the Hunza valley of northern Pakistan is a stunning example of nature's power and potential. Created in January 2010 by a powerful landslide, it is surrounded by majestic mountains and sheer cliffs. It serves to remind us of the dangers posed by landslides and the necessity of preparing for natural disasters..

[Audio] Lakes are an integral component of the environment and possess many physical features. Light impacts the growth of aquatic vegetation and other organisms living in the water. As light is able to permeate downwards and create locations with diverse aquatic life, sediments and other materials also enter the lake which subsequently impacts its temperature, creating warmer and colder spots. Temperature also changes from season to season and according to the depth of the water. This range of temperatures in lakes produces different habitats for living organisms. Examining the physical features of lakes allows us to have a better comprehension of these significant systems..

[Audio] Ox-bow lakes are a type of lake formation that occur when a meandering river across a floodplain results in cut-offs. These curved, C-shaped bodies of water are usually filled with stagnant water and are formed when the river's course changes due to natural events, such as floods or landslides. As they usually have no inlets or outlets, the water within them is typically still. They can be found in low-lying regions close to river banks..

[Audio] Lakes are created through glaciation – a process where snowmelt or underground streams fill hollows between glaciers. Glaciers help shape the landscape by carving out basins where rivers and streams can fill them with fresh water, resulting in many of the world's most valuable fresh water lakes..

[Audio] Discussing the different Fresh Water Lakes in India, Dal Lake is the second largest located in the Kashmir Valley. Bhimtal lake is the biggest in the Nainital district in Uttarakhand. Nainital Lake is an important tourist destination in India. The Loktak Lake in Manipur is unique due to its floating phumdis. Barapani Lake in Meghalaya is another popular picnic spot. These Fresh Water Lakes are important to India's economy and form an essential part of its water resources..

[Audio] Lakes are important and have a variety of uses. Hydel power can be developed which helps to regulate the flow of rivers and maintain the climate of the surroundings. Lakes also help maintain the aquatic system and enhance natural beauty. Tourism and recreational activities can be developed around a lake. Thus, it is evident that lakes are important and have many uses..

[Audio] We will discuss four types of lakes in this presentation. First is Chilika Lake, a brackish water lagoon spread over three districts in the state of Odisha on the east coast of India, at the mouth of the Daya River flowing into the Bay of Bengal. It is the largest coastal lagoon in India and the second largest in the world. Second is Pulicat Lake, a shallow brackish water lagoon that straddles the border of Andhra Pradesh and Tamil Nadu states on the Coromandel Coast in South India. Third is Kolleru Lake, a large, shallow, freshwater lake, located in the Krishna and Godavari deltas in Andhra Pradesh. It plays an important role in flood moderation and irrigation of the two states. Lastly, we have Seasonal Lakes, which appear and disappear due to seasonal cycles. That concludes this presentation..

[Audio] Pollution of a lake can have serious consequences, such as increasing turbidity levels due to the erosion of sediment that clouds the water, which in turn affects aquatic wildlife by reducing the amount of vegetation they can feed off of and decreasing their life expectancy rates. Lake pollution can have varied sources, such as lake construction, spills of contaminants, or non-point source stormwater runoff. Limiting or preventing lake pollution can be difficult, yet necessary, if we wish to reduce the impacts it has on our ecosystems..

[Audio] Pollution of lakes is a major issue that affects everyone. To keep our lakes free from contamination, untreated sewage and solid waste must not be released into them. Furthermore, organic gardening practices should be used and hazardous pesticides and herbicides should be avoided. Taking these steps will help to maintain the purity of our lakes and rivers..

[Audio] Lakes are a natural feature of the landscape. They are typically filled with water from springs and river run-off, as well as from rainfall and snowfall. Lakes provide a vital habitat for a variety of species, including fish, birds, and other wildlife. Taking care of these delicate ecosystems is essential for us to be able to pass them on to the next generations to come..