Geomorphology

Question 1

Drainage Basin

Answer 1

This is the area through which a river system flow

Question 2

Catchment Area

Answer 2

The collection area of rain water in lakes, dames and reservoirs

Question 3

River System

Answer 3

The mainstream and its tributaries

Question 4

Tributary

Answer 4

A river or stream flowing into a larger river

Question 5

Confluence

Answer 5

The junction of two rivers/streams

Question 6

Watershed

Answer 6

High laying area that separates drainage basins

Question 7

Interfluve

Answer 7

High layering are that separates tributaries in a drainage basin

Question 8

Source

Answer 8

The place where the river begins

Question 9

River mouth

Answer 9

It is the part of the river, where the river flow into another river, a lake, reservoir, a sea, or an ocean

Question 10

Ground water

Answer 10

Water underneath the earth surface

Question 11

Through flow

Answer 11

It is the lateral flow of water in the soil zone

Question 12

Water table

Answer 12

Upper level of ground water

Question 13

Infiltration

Answer 13

When water soaks or filters into the soil

Question 14

Factors influencing infiltration of water

Answer 14

Amount of water already in the ground
Evaporation rate
Gradient of the slope
Porosity
Permeability
Soil moisture
Density and type of plant cover
Nature and amount of precipitation

Question 15

Permanent river

Answer 15

Flows throughout the year

Question 16

Periodic river

Answer 16

Flows every year only in the rainy season

Question 17

Episodic river

Answer 17

The rivers only flow for a short period of time after heavy rainfall

Question 18

Exotic river

Answer 18

This is a permanent river that originates in a rainy/wet area but later flows through a desert or dry arid regions

Question 19

Pattern

Answer 19

Arrangement of stream in a drainage basin

Question 20

Resistant to erosion

Answer 20

Hard rock that does not erode easily

Question 21

Underlying rock structure

Answer 21

Type of rock on which the river system flow

Question 22

Alternate layer

Answer 22

Layers of hard and soft rock next to one another

Question 23

Dendritic pattern

Answer 23

Tributaries join the main stream at acute angles
Looks like a tree

Question 24

Underlying rock structure of dendritic pattern

Answer 24

Found in areas with rocks of equal resistance to erosion

Question 25

Trellis pattern

Answer 25

Tributaries join the main stream at right angles Main streams are parallel to each other

Question 26

Underlying rock structure of trellis pattern

Answer 26

Occurs in areas of folded sedimentary rocks Occurs in areas where hard rock and soft rock alternate

Question 27

Radial Pattern

Answer 27

Streams radiate from a central point

Question 28

Underlying rock structure of radial pattern

Answer 28

Found in areas with a dome like structure Flows outwards from the dome

Question 29

Rectangular pattern

Answer 29

The mainstream displays right angle bends

Question 30

Underlying rock structure of rectangular pattern

Answer 30

Found in areas with igneous rocks with joints and cracks

Question 31

Deranged pattern

Answer 31

Streams have irregular patterns Tributaries do not link up with the main stream

Question 32

Underlying rock structure of deranged pattern

Answer 32

Occurs in regions subjected to glaciation

Question 33

Centripetal pattern

Answer 33

Streams converge into a low-lying area Rivers discharge their waters from all directions in a lake

Question 34

Underlying rock structure

Answer 34

Basin like structure Streams flow inward toward the centre

Question 35

Parallel pattern

Question 36

Underlying rock structure

Answer 36

Forms where there is a pronounced slope to the surface Also develops in regions of parallel elongate landforms like outcropping resistant rock bands