Geomorphology of Watershed

Question 1

A watershed or catchement defines the boundary of the surface runoff system and the line which divides the runoff between catchment is called?

Answer 1

topographic water divide

Question 2

Small watersheds has a predominance of (blank) which affect the peak flow rate of runoff.

Answer 2

overland flow

Question 3

Large watersheds are dominated by (blank).

Answer 3

channel flow

Question 4

These patterns of channel networks are formed in a homogeneous region which does not offer any variation in resistance to the flow of water resulting in flow to any direction.

Answer 4

Dendritic and sub - dendritic (tree - like)

Question 5

This pattern is formed when the underlying rock strata is sharply dipping or is strongly folded. The longer stream flows in one particular direction and its tributaries run at right angles to it.

Answer 5

Trellis

Question 6

This pattern is generally formed on dome mountains or volcanoes, where streams emanate from a central point and flow out radialy from that point.

Answer 6

Radial

Question 7

These patterns are formed due to the internal geologic structure of the watershed land surface.

Answer 7

Parellel and sub - parallel

Question 8

Special types of trellis stream patterns but are formed due to the weaker strata in dome mountain regions.

Answer 8

Annular (or appromimately circular)

Question 9

Patterns get formed in regions with many rectangular joints and faults, where the streams meet at right angles.

Answer 9

Rectangular

Question 10

This type is similar to the dendritic stream patterns but in this case, all the mainstreams flow in one direction to which the tributaries join at at oblique angles.

Answer 10

Pinnate

Question 11

When stream channels in a basin are classified based on their degree of branching or bifurcation, they are called?

Answer 11

stream orders

Question 12

The total length of streams of all orders of the basin to the basin area.

Answer 12

Drainage Density

Question 13

Also termed as stream frequency.

Answer 13

Stream Density

Question 14

The projected surface on the horizontal plane of a basin map. (Blank) is an important factor for the prediction of the stream discharge characteristics.

Answer 14

Basin Shape

Question 15

The relationship between horizontal cross - sectional areas and altitudes of watershed.

Answer 15

Hypsometric Curve