Geology Reference
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25 wells every month during the first week in one day. Due to unavoidable
circumstances few wells were not monitored during some months. By this
process after three years there were data gaps for some of the wells during
various months (Fig. 2). But the water level had to be known for those wells
for all months to have a complete time series of water level. The data gaps
from January 2000 to October 2000 were completed by geostatistical
estimation using unbiased kriging estimation variance (Best Linear Unbiased
Estimator BLUE, Kitanidis, 1997). After the estimation of the water level
was made along with variance of estimation, it was plotted with complete
data set along with estimation variance and the water level now available
from January 2000 to August 2003.
STUDY AREA
The study area, Maheshwaram watershed, falls between the geographical
coordinate 17° 06' 20" to 17° 11' 00" North latitude and 78° 24' 30" to
78° 29' 00" East longitude and is situated in Ranga Reddy district at about
30 km south of Hyderabad, Andhra Pradesh, India and covering an area of
55 km 2 , is a typical watershed in a granitic terrain with outcrops, structural
features and fissure systems (Fig. 1). The average annual rainfall of the area
Figure 1. Study area and location of wells.
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