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22 слайда
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1,2,3,4,5,6,7,8,9,10,11
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Слайды и текст к этой презентации:
№1 слайд![](/documents_6/797955270884f0ea40a04635102b4193/img0.jpg)
№2 слайд![](/documents_6/797955270884f0ea40a04635102b4193/img1.jpg)
№3 слайд![](/documents_6/797955270884f0ea40a04635102b4193/img2.jpg)
№4 слайд![Water Resources . Uses of](/documents_6/797955270884f0ea40a04635102b4193/img3.jpg)
Содержание слайда: Water Resources
. Uses of water include agricultural, industrial, household, recreational and environmental activities. Virtually all of these human uses require fresh water.
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№6 слайд![Water resources are divided](/documents_6/797955270884f0ea40a04635102b4193/img5.jpg)
Содержание слайда: Water resources are divided:
Water resources are divisible into two distinct categories : the surface-water resources and the ground-water resources. Each of these categories is a part of the earth's water circulatory system, called the hydrologic cycle, and is derived from precipitation, which is rainfall plus snow.
№7 слайд![](/documents_6/797955270884f0ea40a04635102b4193/img6.jpg)
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№11 слайд![Sources of Fresh Water](/documents_6/797955270884f0ea40a04635102b4193/img10.jpg)
Содержание слайда: Sources of Fresh Water
Surface water:
Surface water is water in a river, lake or fresh water wetland. Surface water is naturally replenished by precipitation and naturally lost through discharge to the oceans, evaporation, and sub-surface seepage.
№12 слайд![Ground Water Ground Water](/documents_6/797955270884f0ea40a04635102b4193/img11.jpg)
Содержание слайда: Ground Water:
Ground Water:
Sub-surface water, or groundwater, is fresh water located in the pore space of soil and rocks. It is also water that is flowing within aquifers below the water table.
№13 слайд![Frozen Water Frozen Water](/documents_6/797955270884f0ea40a04635102b4193/img12.jpg)
Содержание слайда: Frozen Water:
Frozen Water:
Several schemes have been proposed to make use of icebergs as a water source, however to date this has only been done for novelty purposes. Glacier runoff is considered to be surface water.
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№18 слайд![Uses of water Agricultural It](/documents_6/797955270884f0ea40a04635102b4193/img17.jpg)
Содержание слайда: Uses of water
Agricultural: It is estimated that 69% of worldwide water use is for irrigation, with 15-35% of irrigation withdrawals being unsustainable. Aquaculture is a small but growing agricultural use of water.
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№20 слайд![Household It is estimated](/documents_6/797955270884f0ea40a04635102b4193/img19.jpg)
Содержание слайда: Household: It is estimated that 15% of worldwide water use is for household purposes. These include drinking water, bathing, cooking, sanitation, and gardening.
Household: It is estimated that 15% of worldwide water use is for household purposes. These include drinking water, bathing, cooking, sanitation, and gardening.
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