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LAND
OCEAN
ATMOSPHERE
ENVIRONMENT
SOCIETY
SPACE
NATIONAL WATER RESOURCES ASSESSMENT
(A PILOT STUDY IN GODAVARI AND BRAHMANI-BAITARANI BASINS)
Earlier, different commissions, agencies,
have estimated water resources of the
country using different approaches. All
these studies were based on the observed
flows at terminal sites and upstream
abstractions for irrigation and domestic
consumptions. Limitations of these studies
are: limited field data on abstractions,
lumped approach, no meteorological data
were taken into consideration, and no mechanism for cross-validation.
Considering the importance of re-assessment of water resources
availability in the country, National Remote Sensing Centre (NRSC), ISRO,
Hyderabad has initiated an R&D Project titled “Assessment of National
Water Resources using Space Inputs.” After thorough discussions with
Central Water Commission, New Delhi, a joint pilot study has been executed
by NRSC and Central Water Commission (CWC) in the Godavari and
Brahmani - Baitarani Basins.
MAJOR HIGHLIGHTS
·
resources during 20 years
(1988-89 to 2007-08) at basin
scale using space inputs
through distributed
hydrological modelling
approach
·
Soil Texture
Rainfall Grid (Aug-2006)
Runoff (2006-07)
www.isro.gov.in
Assessment of water resources
in extreme maximum and
minimum rainfall years during
the last 35 years
The Godavari Basin
Land-use/ Land-cover
Assessment of annual water
MAJOR BENEFITS
·
Latest update on water
resources availability at basin
scale
·
Information on spatial
variability of water resources
·
More accurate as it follows a
process-based distributed
modeling approach
Indian Space Research Organisation
LAND
OCEAN
ATMOSPHERE
ENVIRONMENT
SOCIETY
SPACE
NATIONAL WATER RESOURCES ASSESSMENT
(A PILOT STUDY IN GODAVARI AND BRAHMANI-BAITARANI BASINS)
SPATIAL AND NON-SPATIAL DATABASE
RESULTS
Static Data: Land-use / land-cover (LULC) maps of
2004-05 to 2007-08, 1985 & 1995, Soil Texture map,
Digital Elevation Model (DEM), and Command Area
map
Dynamic Data: Daily rainfall and temperature grids of
20 years at 0.5 and 1 degree resolutions respectively
(IMD); River discharge at various gauge locations and
reservoir flux data (CWC); Groundwater flux data
(CGWB); Demographic data (1991 and 2011 Census)
Godavari Basin
Condition
Year of Occurrence
Rainfall
Water Resources
(BCM)
Availability (BCM)
Min.
2002-03
275.50
72.63
Max.
1994-95
435.88
178.70
Mean
1990-91 to 2007-08
348.35
113.09
Rainfall
Water Resources
(BCM)
Availability (BCM)
Brahmani-Baitarani Basin
Condition
Year of Occurrence
Min.
2004-05
42599
14421
Max.
1994-95
101932
62417
Mean
1988-89 to 2007-08
74892
35129
*mean rainfall of 1971-72 to 1984-85
Brahmani-Baitarani Basin
Land-use/
Land-cover
Soil Texture
Built-up
Current fallow
Deciduous forest
Double/tripple crop
Evergreen forest
Grassland
Gullied Land
Crop (Kharif only)
Littoral Swamp
Other wasteland
Plantation/orchared
Crop (Rabi only)
Scrub/Deg. forest
Scrubland
Shifting cultivation
Snow cover
Water body
Crop (Zaid only)
Rainfall
20.0 mm
www.isro.gov.in
River
Basin Boundary
Sandy
Loamy
Clayey
Clay skeletal
Loamy skeletal
Rock outcrop
Water body
Mean of Observed Vs. Computed Runoff at various Discharge Stations
Runoff
629.8 mm
Mean Water Resources Availability in the Brahmani-Baitarani Basin
(1988-89 to 2007-08)
Runoff (mm)
<600
600-800
800-1000
1000-1200
1200-1400
1400-1600
Indian Space Research Organisation