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Flow Resources: Water
Transcript of Flow Resources: Water
WATER WHAT IS FLOW? How is water a
Flow Resource? WHERE IS THE WATER? How Much Water Do We Use? INDUSTRY Agriculture Household TECHNOLOGICAL ADVANCES? How can we use technology to save water? RIVER DIVERSIONS THE ARAL SEA HYDRO-ELECTRICITY THREATENING RUNNING WATER POLLUTION Over Use Ocean Currents Continental Shelves Ocean Pollution At 67, 300 km, it was once ranked #4 in the worlds largest lakes. 2 However, it has been shrinking at about 1.5% per year. In total, adding up to 50% gone, in the last 30 years. IMAGINE THIS... A hose, pouring slowly and gently into a bowl of water creating a nice soothing sea. When you place a lot of sponges into the hose, you disrupt the stream. The water begins to enter as drops. Drip. Drip. Drip And it boils, like this egg right here: Resulting in: the Aral sea Flow is a resource that never remains in one place and self-replenishes such as WIND, SUN, or WATER. Across the world, there is an average of 200-300 mm of rain per year
Some places on earth have very little water e.g. Sahara Desert whereas other places have a surplus e.g. the Amazon
Most areas in the Northern Hemisphere have over 1000 mm of rain per year
Generally, the Southern Hemisphere has less than 200mm of rain per year Generally water is a flow resource unless people do something exceptional such as sending it into space. Then it will not move and is no longer a Flow Resource.
Freshwater is renewable because it takes time to replenish itself. However, saltwater has a higher quantity and is easier to gather and obtain. Everyone needs water to survive; in fact, our body is made up of 70% water. Each day, we are also expected to drink 8 cups of water. Electricity is generated by flowing water.
Flowing water flows through screen racks.
Then, the water goes down the chute.
It hits the turbine, causing it to spin.
This generates the generator, and makes electricity. 1. Surface Irrigation-96%.
There is a tube on the field that will fill the ditch with water.
2. Sprinkler Irrigation- mainly with North America Farmers.
Sprinkling Irrigation is basically like watering your lawn, water sprinkles out from a tube.
3. Drip Irrigation- In Rich Countries.
It is an expensive system to have, it is very effective and less water is wasted.
This technology is when water drips out from a metal tube and straight into the plant’s roots. We can use water for many industrial uses. We will also use them in many different methods. Here are the top Industrial water uses:
1. Thermal power generation---60%
4. Mining---4% Each Canadian uses an average of 390L of water per day. This equals to 4 full bathtubs of water. This water is used for:
• Toilet flushing: 40%
• Washing/bathing: 35%
• Dishing/laundry: 20%
• Drinking/food: 5% Many companies just throw their waste into the ocean now. Some of that waste is toxic. This is the pollution. The one and only way to prevent this is to get a law or a bill that bans them from polluting the water. Even so, there may be some law-breakers that will still pollute the water... Global water use:
• Agriculture: 69%
• Household: 8%
• Industry: 23% All animals and plants need water to survive, and some must live in water. Everyday, millions of pieces of trash are thrown into rivers and lakes when they should be in the garbage. Industry Bibliography http://www.ec.gc.ca/eau-water/default.asp?lang=En&n=851B096C-1
Geography Textbook There are many threats to running water that humans are creating. These threats include the production of dams or overuse of water. There are also threats such as river diversion, and pollution that makes our water toxic. One form of surface irrigation is terracing. This technology is used where there are mountains and farmers who need to farm on the slopes. These farmers will meet 2 problems; Firstly, they must stop water from running off their fields, and they must prevent their soil from washing away. Terracing solves both problems, farmers turn the mountains into giant stairs, Terraces. This is an example of technological advancement. River Diversions are made when rivers are needed to water irrigated crops. This results in many environmental damages. Many areas lose water due to the river diversions. This causes the animals and plants living there to die off. Overuse occurs when overpopulated areas crowd around small bodies of water. They will need more water than they have. Then they don't give time for the water to replenish itself. Too many people using the same water will result in unhealthy conditions. Ocean currents are flows of water in the ocean. They are affected by winds and the how the earth is spinning. There are cold and warm currents. A cold current is a current that moves from cold to warm water whereas the warm currents move in the opposite direction. Continental shelves are the shallow parts of the ocean. They are near the coasts of the continents. Fish are usually caught within the continental shelves, this may be a problem in the future due to threats in the continental shelves. Such as pollution and lack of food.