Sub-basin

Priority for conservation

Description of the sub-basin, physiography and erosion intensity

1

1

Isolated hillocks are composed of quartzite and migmatite type of rocks as intrusive in khondalite country ricks. Dendritic parallel drainage patterns are prominently seen in khondalite hillocks and plains. It has moderate slopes with more perennial tanks.

2

2

The rock type observed is khondalite. Highly denuded rocks, sub-dendritic drainage pattern rolling topography with moderate slopes. At place sparse and discontinuous drainage is observed down below next to the reservoir area with khondalite rock presence.

3

7

Dendritic drainage developed over drainage country rock with low slopes. Perennial tanks with moderate storage capacity observed.

4

8

Radial, dendritic and sub-dendritic drainage patterns are observed. Khondalite rock with rolling topography is observed.

5

9

Sparse and discontinuous drainage is observed. The discontinuous drainage is due to anthropogenic activity in this watershed. It is located in the reservoir area with natural khondalite rock abutment.

6

4

This is a part of Naravagedda drainage basin which is the main tributary to Meghadrigedda river. The rock types are khondalite and quartzite. Steep slopes are confined in the hilly terrain. Higher rate of denudation and rolling topography are the characteristic features of this sub-basin.

7

5

This sub-basin is the major drainage of the Naravagedda river. Landmass denudation, steep slope with rill erosion and khondalite and migamatite types of rocks are exposed.

8

3

This basin is located in the upper catchment of the river, where the tock types are khondalite and migamatite. The migamatite occurs as intrusive in khondalite massif. Moderate slope with varied type of drainage pattern are common in this sub-basin.

9

6

This sub-basin is the origin of the river Meghadrigedda. Different types of drainage patterns with moderate slope, feather like drainage basin features are observed. Khondalite rock type prevails.