Results and Discussion
Geology : The geological sequence of block forms part of Vindhyan Supergroup, which is essentially made up of sedimentary rocks including sandstones, shales and limestones.
Stratigraphic Sequence in Dhaulpur
| Recent to Quaternary |
Alluvium |
| MiddleToUpperProterozoic |
Vindhyan
Supergroup |
Bhander Groups
Rewa Group |
Fine to medium grained sandstone with minor shale intercalations (Upper Bhander Sandstone) |
| |
|
|
Shales with interbeds of stromatolitic limestone (Sirbu Shales) |
| |
|
|
Fine grained thickly bedded sandstone (Upper Rewa Sandstone) |
Rewa Group: It is generally quartzitic in nature and characterised by more frequent intercalation of shales.
Bhander Group: The rocks of the Bhander group cover a very large area in Dhaulpur are essentially made up of sandstone, shales & minor limestones.
Alluvium: Narrow zone along Chambal River is covered by Quaternary Alluvium. It shows gradual thickening towards northeast and consists of mainly fine sand, silt and coarse gravels.
Structure: The sandstones in the area pre-dominantly show bedding joint.
The Chambal river, which is flows in a linear valley is interpreted to follow a structural valley formed by a fault. The river Parbati also appears to be fault controlled. There are number of other subsidiary faults parallel as well oblique to the general northwestern trend of the Vindhyan rocks.
Hydro-geomorphology:
The major geomorphic units identifying in this block are alluvial plains, river terraces, river channel, buried pediplain, denudational hills and upper plateau. Alluvial plains cover the maximum part of the block, which is a major geomorphic unit in the area. About 64.26% of the block has very good groundwater prospect. Deep ravenous alluvial plain and moderately deep alluvial plain occupy 16.60% area of the block, which is highly dissected. The ground water prospect in this zones moderate to good. River terraces are slightly raised alluvial flat of older alluvium along Chambal River showing high dissections, which cover 1.029 sq. km. area of the block, it has moderate to good ground water potential. Flood plain along Parbati River is very narrow, covers 0.188 sq. km. area, which has excellent groundwater potential. The upper plateau on sandstones covers 20.912 sq. km. area of the block, which has poor ground water potential. The other geomorphic units are buried pediment denudational hill and River channel, which are under good to poor ground water prospect zone.
Groundwater Prospect Dhaulpur Block
| Geomorphic unit |
Description |
Ground water prospect |
Area within the block (sq. km.) |
Area in Percentage |
| FLUVIAL ORIGIN |
| Flood Plain |
Very narrow flat area along river Parbati |
Excellent |
0.188 |
0.03 |
| Paleo Channel |
Narrow arcuate tract within alluvial plain |
Very good |
0.653 |
0.11 |
| Channel Bar |
Small alluvial patch forming part of the riverbed. |
-- |
0.052 |
0.01 |
| Buried Channel |
Narrow arcuate tract in ravenous alluvial zone |
Good |
0.618 |
0.10 |
| Channel Meander |
Narrow meandering tracks along river Parbati |
Good |
0.228 |
0.04 |
| River Terrace |
Slightly raised alluvial flat of older alluvium along river
Chambal |
Very good |
13.648 |
2.27 |
| River Terrace Ravenous |
Slightly raised alluvial flat of older alluvium along river Chambal showing high
dissections |
Moderate to Good |
1.029 |
0.17 |
| Valley Fill Shallow |
Narrow depressions filled with colluvial material with in upper plateau. |
Moderate depending upon the thickness of full |
0.461 |
0.08 |
| Alluvial Plain Deep |
Nearly flat plain of alluvial sediments occupying a very large area having more than 30m
depth. |
Very good |
386.72 |
64.26 |
| Alluvial Plain Deep Ravenous |
Nearly flat plain of alluvial sediments occupying a very large area having more than 30m depths, highly
dissected. |
Moderate to Good |
67.214 |
11.17 |
| Alluvial Plain Moderate |
Nearly flat plain consisting of alluvial matter having thickness of 10-20m. |
Good |
38.717 |
6.43 |
| Alluvial Plain Shallow |
Nearly flat pain consisting of alluvial matter having thickness of less than 10m. |
Good |
42.277 |
7.03 |
| DENUDATIONAL ORIGIN |
| Buried Pediplain Shallow |
Nearly flat area within sedimentary plateaus of < 10 m
thickness. |
Poor |
0.189 |
0.03 |
| Pediment |
Gentle slopes on the foothills of denudation hill of sandstones. |
Moderate |
7.91 |
1.31 |
| Outer Fringe of Plateau |
Middle slopes of the sandstone plateaus of around 150 - 200
slope |
Poor |
0.154 |
0.03 |
| Denudational Hill |
Isolated hills of sandstones of medium height |
Poor |
5.916 |
0.98 |
| STRUCTURAL ORIGIN |
| Upper Plateau (Highly Dissected) |
Plateau on sandstones rising to heights of nearly 150m from
plains |
Poor better possibility along secondary porosity zones. |
20.912 |
3.48 |
In the Dhaulpur block the stage of groundwater development has been categorized as 'CRITICAL'. The Quaternary alluvium, which covers a large part in the Dhaulpur block shows moderate to high yield where groundwater generally is suitable for domestic and irrigation purposes. The groundwater yield in the Bhander Sandstone and Sirbu Shales and limestone is low to moderate and the quality of water is suitable for domestic and as well as irrigation purposes.