Components
of hydrologic cycle
World Water
Budget
Total quantity of water in the
world is estimated as 1386 M km3
–
1337.5 M km3
of water is contained in oceans as saline water
–
The rest 48.5 M km3 is land water
13.8 M km3 is again
saline
34.7 M km3 is fresh
water
–
10.6 M km3 is both liquid and fresh
–
24.1 M km3 is a frozen ice and glaciers in
the polar regions and mountain tops
Estimated
World Water Quantities
Global annual water balance
Water
Balance of Continents
Water
Balance of Oceans
Application
in Engineering
Hydrology finds its greatest
application in the design and operation of water resources engineering projects
–
The capacity of storage structures such as
reservoir
–
The magnitude of flood flows to enable safe
disposal of the excess flow
–
The minimum flow and quantity of flow available
at various seasons
–
The interaction of the flood wave and hydraulic
structures, such as levees, reservoirs, barrages and bridges
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