Demarcation of ground water potential zones satellite data: A case study of Jaipur district (India)
Following table reveals that very high lineament intersection density constitute one fifth per cent area, particularly in central and eastern part of the district. (Fig. 1.D). A zone of high density is phases through south-western to south-eastern part of the district. About one third area of the district particularly in central, eastern and western part constitute medium density. Low and very low lineament intersection density is found in north-western and along the south border of the district.
(Fig. 1.D).
Fig. 1.
Lineament Intersection Density in Jaipur District
| Sl.No. |
Category |
No. of intersection |
Area |
Percentatge |
| 1. |
Very High |
8 |
2832.00 |
20.13 |
| 2. |
High |
6-8 |
1812.00 |
12.88 |
| 3. |
Medium |
4-6 |
5310.00 |
37.75 |
| 4. |
Low |
2-4 |
2452.00 |
17.43 |
| 5. |
Very Low |
2 |
1662.00 |
11.81 |
| Total |
14068.00 |
100.00 |
Geomorphology
Geomorphology is the most significant in ground water assessment because the rate of percolation, runoff, discharge and recharge vary in each geomorphic unit therefore ground water potentiality is also vary. In hilly region exploration of under ground water is
limited because of high construction cost of wells, though there very high water accumulation is found due to multi phased techtonic activity. In piedmont plains medium to low water potentiality is found due to presence of hard rock beneath. Older alluvial plains are found throughout the district where medium water potentiality is found.
(Fig.1.B). In younger alluvial plains ground water potentiality is very high because coarse to medium textured sands to loamy. Sands and sandy loam soils are good water bearing strata. Ad to this the plains are found along the river course and river flow along water bearing lineaments or faults. Generaly sand dunes have very low water potentiality but some old sand dunes have low water potentiality.
Land use/land cover
Land use/land cover basically depends on hydro geomorphic characteristic of features. Thus the land use/land cover indirectly give an idea about land forms which has agricultural activity, are the areas of good ground water potentiality. Further it can be said that increase in agricultural intensity directly related to the ground water potentiality. It is the most important indicator in arid and semi-arid region where agriculture depends on well irrigation.
In this district about 52 per cent area is under Net Sown Area (NSA). More than 60 per cent NSA is found in central and eastern part of the district (Fig.2.A) which indicate that high ground water potentiality is found particularly in younger alluvial plains of Bangansa and Bandi riverse. Medium intensity of NSA is found in north-eastern area's , Viz. are Kotoutly, Baswa, Phagi and Chaksu tehsil
(Fig.2.A). In these areas ground water potentiality is medium to low and very low water potential areasof western, north-western and south part of the district. (Fig. 2 A & B).
Fig. 2.
