Rivers & Fluvial Environment

Question 1

have water in the channel throughout the year

Answer 1

perennial rivers

Question 2

seasonal rivers

Answer 2

intermittent rivers

Question 3

have water in the channel after heavy downpour of rains

Answer 3

ephemeral river

Question 4

rivers in a arid regions

Answer 4

exotic rivers

Question 5

rivers the loose water in the ground water

Answer 5

influent rivers

Question 6

rivers that gained water in the ground water

Answer 6

effluent rivers

Question 7

uncommon and forms in channel with steep gradients

Answer 7

straight rivers

Question 8

characterized by wandering or meanders rivers that crosses a valley bottom, side to side erosion, fining upward

Answer 8

meandering rivers

Question 9

characterized by broad channel with multiple sub channels and with eyots and sand bars, coarsening upward

Answer 9

braided rivers

Question 10

consists of multiple interconnected channels that are separated by areas of a floodplain, high sand/mud ration

Answer 10

anastomosing rivers

Question 11

streams whose course is a direct consequent of the original slope of the land

Answer 11

consequent river

Question 12

river whose course have shifted from the original consequent ones

Answer 12

subsequent rivers

Question 13

river whose course are controlled by factors which are not determinable, notable lack of structural lithologic control of their location

Answer 13

insequent rivers

Question 14

streams flows opposite to the original consequent drainage

Answer 14

obsequent rivers

Question 15

drain in the same direction as the original consequent drainage but are at lower topographic levels

Answer 15

resequent

Question 16

irregular branching of tributary streams in many direction

Answer 16

dendritic pattern

Question 17

a system of sub parallel streams, usually aligned along the strike of the rock formation

Answer 17

trellis pattern

Question 18

mains stream and its tributaries display right angled bends

Answer 18

rectangular pattern

Question 19

have ring like planes, found around dissected domes which have alternating bends of hard and soft rocks encircling them

Answer 19

annular pattern

Question 20

marked by irregular stream courses which flow into and out of lakes and have only a few tributaries

Answer 20

deranged patteren

Question 21

shows drainage line converging in to a central depression

Answer 21

centripetal pattern

Question 22

streams diverging from a central elevated tract

Answer 22

radial pattern

Question 23

found where there are steep slopes or structural controls which leads to regular spacing of parallel or near parallel streams.

Answer 23

parallel pattern

Question 24

factors controlling sedimentation of lakes

Answer 24

lake size
closed vs. open basin
water chemistry
amount of sediment entering the basin
shape of basin
regional tectonics
depth of the basin
water temperature
wind

Question 25

lakes with low salinity and low rate of dissolution of ions, can be either open or closed

Answer 25

freshwater lakes

Question 26

lakes with high salinity and higher concentration of ions due to evaporation, hydrologically closed

Answer 26

saline lakes

Question 27

lakes that occurs in arid regions, temporary lakes that form due to heavy rains

Answer 27

ephemeral lakes

Question 28

oxygenated lake facies, displays evidence of wave or current processes, traces of plant fossils

Answer 28

epilimnic facies

Question 29

finely laminated terrigenous biogenic and authigenic materials

Answer 29

hypolimnic facies

Question 30

dessication cracks and evaporites

Answer 30

ephemeral facies

Question 31

represents shallow or ramped margins

Answer 31

lake-shore facies