Question

6) Due to increased urbanization and deforestation, the level of ground water in a city has gone down. The depth
of groundwater in the North zone is 3 times the depth of groundwater in its South zone and the depth in the West
zone is 2 times the depth in the South zone. The total depth of groundwater in the North and West zone is 64 m
more than in the South zone. Find the depth of the ground water level in each zone
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Answer 1

Answer:

Across the globe human populations are becoming increasingly urban, with approximately fifty

percent of the world’s population currently residing in urban areas [1]. Urban centers often develop

along rivers because of the river’s capacity to provide drinking water and transportation [2]. Over the

last two centuries, urbanization has caused changes in watershed hydrology that include declines in the

natural filtering capacity of river systems (e.g., channelization of headwater streams, loss of

floodplains and wetlands) and regulation of flows due to the construction of dams and impoundments.

Such changes have resulted in globally altered watershed sediment and solute export [3]. With

urbanization comes an expansion of watershed total impervious area (TIA), in the form of parking lots,

roadways, lawns, and rooftops. TIA reduces infiltration and surface storage of precipitation and

increases surface water runoff [4]. Several recent reviews have synthesized the literature on physical,

hydrological, chemical, and ecological effects of urbanization on stream systems [5-7].

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