This document discusses how people use natural resources like water. It provides examples of both good and bad ways that people use water resources. The good ways include using water conservatively for things like household activities, while the bad ways involve pollution that contaminates water supplies and harms the environment. The document emphasizes the importance of preventing water pollution and conserving water for current and future generations.
ppt on 10th class social science topic- Water resources.It contains topics like water sources, types of sources, water scarcity, water conservation and conservation methods.
social science project ppt on Water Resources
Contents:
Introduction.
Prior Knoledge.
About Water resources.
Division of water resources.
Source of Water resources.
Uses of Water.
ppt on 10th class social science topic- Water resources.It contains topics like water sources, types of sources, water scarcity, water conservation and conservation methods.
social science project ppt on Water Resources
Contents:
Introduction.
Prior Knoledge.
About Water resources.
Division of water resources.
Source of Water resources.
Uses of Water.
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Water Resources and Water PollutionLife on planet Earth would be.docxmelbruce90096
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Water Resources and Water Pollution
Life on planet Earth would be impossible without water. All life forms, from unicellular bacteria to multicellular plants and animals, contain water. Humans are composed of approximately 60 percent water by body weight and we depend on water, not only for our survival, but for our convenience: We drink it, cook with it, wash in it, travel on it, and use an enormous amount of it for agriculture, manufacturing, mining, energy, production, and waste disposal. Though 71% of the Earth’s surface is covered in water, only 0.024% of the overall water supply is available as liquid freshwater that is easily accessible. It is one of the most poorly managed resources, easily wasted and often polluted. The available freshwater is collected, purified and distributed in the hydrologic cycle, but this cycle is easily interrupted by overloading with pollution, reducing wetlands, and reducing forests.
We get water from groundwater and surface water. Groundwateris water that seeps into the ground between spaces in soil and gravel until it reaches impenetrable bedrock. One of the most important sources of freshwater. The top of the groundwater zone that moves up and down based on weather is the water table. The water table drops in level when humans remove water at a faster rate than it is replenished. Surface wateris freshwater from precipitation and melted snow that flows into lakes, wetlands, rivers, and eventually into the oceans.
Water shortages are caused by many factors including dry climate and drought. In some places, the human population uses water at a faster rate than the water is replenished. 30% of the Earth’s land mass now experiences severe or extreme drought and 1 billion people lacked regular access to clean water for drinking, cooking, and washing.
Water Supplies
Aquifers, underground water supplies, are renewable as long as the groundwater doesn’t become contaminated and withdrawn too quickly. Most aquifers around the world, and in the largest food producing countries, are being used up quicker than their rate of replenishment. Dam and reservoir systems are used to capture and hold runoff water. The collected water can be released at need to control flooding, supply water for farming and cities, and to produce electricity. The use of dams and reservoirs has increased the amount of reliable surface runoff by one-third. Unfortunately, these systems also displace people, flood productive lands, and disrupt the ecological services rivers provide.
Tunnels, aqueducts, and underground pipes transfer runoff from dams and reservoirs to water-poor areas. These transfer systems can be wasteful and environmentally harmful by shrinking the water source as more is transferred to water-poor areas. Another option for freshwater is desalinization which involves removing salts from ocean or brackish water. Usually desalinization costs a lot because of the energy required; it also kills many marine organisms and creates salty.
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