724 
Juna 1978 
N 
k 
Oct. 1978 
Figure 2. Maps showing depth to water; 
June and October 1978. 
7 GROUNDWATER QUALITY 
It is clear from figure 3 that shallow 
groundwater in the region shows great 
variation in chemical quality from place 
to place. Some of the shallow waters in 
area are saline and are not suitable for 
irrigation. The specific conductivity of 
shallow waters in the area ranges between 
446 and 34160 micro hos/cm at 25°C, Ec 
values of more than 6000 micro hos/cm at 
25°C i.e. areas of saline groundwaters, 
occur in the central part of the study 
area around Pataudi and Firozpur Jhirka. 
It is found that fresh water occurs all 
along the piedmont zone of Alwar formation 
and Ajabgarh formation on either sides. As 
one moves towards plain from piedmont zone 
salinity increases. Some patches of fresh 
water have been found in plain area surroun 
ded by the saline water areas. These patch 
es of fresh water areas are on paleochannel 
fills of the abandoned river courses of 
recent past times. Due to granular material 
deposits in paleochannels and better drainage 
as well as flushing conditions sweet water 
is found. Saline water mainly occurs due to 
the physiographic conditions of the area in 
depressions. There is no outlet in the 
study area. Rainfall occurred during rainy 
season inundates the area and makes water 
logging thereby endangering human life and 
property. Since there is no outlet in 
deadly flat area, there is no flushing 
which contributes to the increasing salinity. 
5 kin 
FRESH ( EC< 2000MicroMH0Sj 
MARGINAL CEC200O-S0O0 ) 
SALINE (>6000) 
Figure 3. Water quality map. 
Water quality map (figure 3) shows that 
salinity has negative correlation with 
depth and relief. As the depth increases, 
salinity decreases and as the relative 
relief increases, the salinity decreases. 
Based on above, it can be -said that area 
is having good potential of groundwater, but 
faces acute groundwater problems in respect 
of quality. The paleochannels can be used 
to extract good quality of potable water. 
REFERENCES 
Adyalkar, P.G. 1964. Paleography, sedimenta- 
logical frame work and groundwater poten 
tial of the arid zone of Western India. 
Proc. Samp. Prof. Indian Arid Zone, New 
Delhi. 
Heron, A.M. 1917. The Geology of the North 
Eastern Rajputana and Adjacent Districts, 
Mem. GSI., Vol.XLV, No.l. 
Vertappen, H. Th., and R.A. Zuidam; System 
of Geomorphological Survey, ITC, Vol.7, 
No.2. 
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