Chapter 4 | Physiography of Lakes and Reservoir (Lake Formation & Origin)

Question 1

an aquatic ecosystem in which the
water is still and not rapidly moving

Answer 1

Lentic environment

Question 2

Lentic environments includes?

Answer 2

lakes, ponds, and wetlands

Question 3

a body of water that is surrounded by land.

Answer 3

*Lake

Question 4

has a smaller surface area than lakes

Answer 4

*Pond

Question 5

the water is in photic zone

Answer 5

*Pond

Question 6

a distinct ecosystem that is flooded by water,
either permanently or seasonally, where oxygen-free processes prevail.

Answer 6

*Wetland

Question 7

a slowly flowing open body of water in a depression of ground

Answer 7

Lake

Question 8

Classification of lakes can be according to?

Answer 8

1. Water Retention
2. Origin & Formation
3. Trophic Level
4. Mixing of Water

Question 9

are common where more precipitation occurs and where geology allows for formation of water-
retaining basins

Answer 9

Permanent lakes

Question 10

lakes that are dry for part of the year

Answer 10

Intermittent lakes

Question 11

Classification of lakes according to Origin and Formation

Answer 11

1. Tectonic lakes
2. Salt lakes
3. Oxbow lakes
4. Crater lakes
5. Sinkhole lakes
6. Glacial lakes
7. Artificial lakes

Question 12

are formed due to tectonic uplift of a
mountain range. These actions can
create bowl-shaped depressions that
accumulate water and form lakes.

Answer 12

Tectonic lakes

Question 13

are tectonic lakes formed
where multiple faults allow a block to
slip down and form a depression.

Answer 13

Graben lakes

Question 14

are formed when blocks tilt
and leave a depression that can be filled
by water.

Answer 14

Horst lakes

Question 15

form when the water flowing into
the lake, containing salt or minerals,
cannot leave because the lake is
endorheic (terminal).

Answer 15

Salt lakes

Question 16

are small, crescent-shaped lakes formed
along the meandering river courses. The
slow-moving river forms a sinuous
horseshoe bend like water body which is
detached from the river through a
narrow neck.

Answer 16

Oxbow lakes

Question 17

This forms a bow-shaped
lake.

Answer 17

Oxbow lakes

Question 18

are formed due to volcanic craters.

Answer 18

Crater Lakes

Question 19

are common where the rock
below the land surface is limestone or
other carbonate rock, salt beds, or in
other soluble rocks, such as gypsum,
that can be dissolved naturally by
circulating ground water.

Answer 19

Sinkhole Lakes

Question 20

forms where the accumulation
of snow exceeds its ablation (melting
and sublimation) over many years.

Answer 20

Glacial Lakes

Question 21

form only on land and are distinct from the
much thinner sea ice and lake ice that
form on the surface of bodies of water

Answer 21

Glaciers

Question 22

HUMAN RESERVOIR OR MAN-MADE LAKES

Answer 22

Artificial Lakes

Question 23

usually constructed by
using a dam to divert a portion of a river to
store the water within a reservoir.

Answer 23

Man-made lakes

Question 24

also formed through excavating
land or with the use of dykes surrounding
the water.

Answer 24

Artificial Lakes

Question 25

These lakes are also called caldera lakes, maar lakes or crater lakes.

Answer 25

VOLCANIC LAKES