JAPRS & SIS, Vol.34, Part 7, “Resource and Environmental Monitoring”, Hyderabad, India, 2002
Ground water can be tapped through shallow and deep tube
wells in alluvial plains and flood plains. The wells tapping the
flood plains generally give high yields with good quality of
water
6.2 Forms of denudational origin: The relief features of
Yamunanagar district are characterised by forms of
denudational origin, which covers 211.51sq. km. (11.8896)
area. Denudational hills, piedmont zone and intermontane
valley constitutes the main units of denudational origin.
Denudational hills cover 5.83% area followed by piedmont
zone and intermontane valley accounting for 5.20% and 0.85%
area of the district respectively. These acts as the main ground
water recharge sources in the area.
Dedudational hills are characterised by steeply sloping, highly
weathered hills mainly consist of sandstone, shales and boulder
beds. These occupy elevation between 400 to 600m above msl
and have poor ground water potential. The piedmont zone
having a width of 3 to 10 km lies on the foot of Siwalik hills
with elevation ranging from 300 to 400 m above msl. This zone
is constituted by sediments brought by the turbulent rivers
emerging from the hills. The piedmont zone has moderate
slopes (average gradient of 5.5 m/km towards southwest) with
10m to more than 30m thick deposits of colluvial and alluvial
sediments (boulders pebbles, sand etc). It serves as good
recharge zone but cannot hold ground water due to steep
hydraulic gradient. A narrow intermontane valley exist in the
area which is drained by Sukh Rao, a minor tributary stream of
Yamuna. The valley have a length of 10.5 km. and width
ranging from 1.0 to 2.5 km. The valley is characterised by
unconsolidated clastic sediments, derived from the adjacent
hills. Intermontane valley has very good ground water
prospects as it is being recharged by the surrounding hills as
well as by the river water flowing through the valley.
7. GROUNDWATER PROSPECTS
The groundwater in the district mainly occurs under unconfined
water table conditions in the upper aquifers which is mainly
formed of fine to coarse sand, silt, clay and calcareous nodules.
In the deeper aquifer zones where the water holding formations
are shales, silt and clays the ground water occurs in semi-
confined to confined conditions. The depth to water table in the
shallow aquifers vary between 5 to 19m below ground level in
the northwestern part of the district whereas deeper water levels
are found in the eastern and southwestern parts (Table 3). The
yields of tube wells in the shallow aquifers are between 100 to
500 lpm. The seasonal range of fluctuations show a rising trend,
which is 0.7 to 4.5m. The rise is more conspicuous along
Yamuna river. Some fall in the water level (0.3 to 4.1m) over
the decade were observed in Radaur and Jagadhri blocks of the
district which suggest over exploitation of ground water.
In general, the quality of ground water in Yamunanagar district
is fresh. The predominant water types are Calcium Bicarbonate
(Ca-HC0O3) with PH values from 7.03 to 7.58. Specific
Conductance values are generally less than 1000
micromhos/cm but higher values are recorded in Mustafabad
(2750) and Sabri (2100) villages. Industrial effluents, sewage
wastes, fertilizers, pesticides and insecticides are adding a large
number of pollutants to both surface and ground water. Higher
concentration of Pb, Cd and Cu is present in the shallow ground
water in Yamuna Nagar and Jagadhri industrial complexes
(CGWB, 1998).
Based on the hydrogeomorphological mapping and collated
data it was estimated that very good to good ground water
prospects cover about 71.12% of the district area. Excellent
area in ground water prospect is only 12.28%. Rest of the area
falls under Good to moderate, moderate to poor and poor to nil
categories each contributing about 5-6% of the district area.
Groundwater prospects in various hydrogeomorphic units
mapped in the district are given in table 2.
Table 2. Aerial coverage of mapped hydrogeomorphic units and their ground water prospects in Yamunanagar district
Geomorphi Map Description Groundwater Area Are
c unit symbo prospect occupie a
1 d (sq. (9/6)
km.)
A. FLUVIAL ORIGIN
Channel CB Small alluvial patch forming part of the river | Excellent 0.72 0.04
Bar bed
Palaeo PC Narrow linear arcuate tract within the alluvial | Good 2.00 0.11
Channel plain
Valley Fill | VFS Narrow depressions filled with alluvial and | Good 0.13 0.01
Shallow colluvial matter of shallow depth «10m.
Flood Plain | FPD Narrow flat areas along the river formed of | Excellent 77.75 4.37
Deep recent sediments > 20m thickness.
Flood Plain | FPS Narrow flat areas along the river formed of | Very Good 25.06 1.41
Shallow recent sediments «10m thickness
Alluvial APD Very gently sloping plain of alluvial sediments | Very Good 1225.4 68.86
Plain deep »20m thickness. | 2
502