Fourth National Conference on Water, Environment and Society From 16-18, March 2017 at JNTU Hyderabad

2. Introduction
 Surface water bodies are the major source for irrigation in
India.
 Information on water spread area, volume of water useful for
understanding the availability of water resources for the crop
season in a river basin / sub basin.
 Satellite based techniques provide the surface water spread at
spatial and temporal scale and also facilitate mapping,
monitoring visualization of the dynamics unlike conventional
methods.

3. The dynamics of surface water bodies in and around
Nagarjunasagar Dam is studied through geospatial analysis
for extraction of water body layers for the month of October,
2015, February, and May, 2016.
Geospatial database on water bodies information has been
created from the landsat 8 image of path/row 143/49
LC81430492015294LGN00.tar,
LC81430492016041LGN00.tar
LC81430492016121LGN00.tar

4. Software
ERDAS Imagine
Arc GIS software

5. Fig.1 Study Area

6. Methodology
Figure.2. Over view of Methodology

7. Results

8. Water Spread area of Oct, 2015
Water Spread area of Feb, 2016

9. Water Spread area of May, 2016

10. Oot, 2015

11.  Quantitative estimates on water spread area (WSA) of
water bodies are obtained for analyzing inters / intra
seasonal / annual analysis.
 The WSA calculated for each of three seasons is 25766.47
ha, 26808.369 ha and 22653.328 ha.
 The water spread area is higher in February, 2016 because
the amount of rainafall recived in the month of October and
November, 2015 is more.