Climate Change Impact Assessment on Hydrology of Indian
-
Upload
vinujohnpanicker -
Category
Documents
-
view
217 -
download
0
Transcript of Climate Change Impact Assessment on Hydrology of Indian
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 1/38
BY,
ANEESH MATHEW,ID:2012PCW5182,M.TECH(WRE).
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 2/38
INTRODUCTION Climate change impacts are going to be most severe in the
developing world because of their poor capacity to adopt
climate variability.
NATCOM, the present study has been taken up to quantify
the impact of climate change of the water resources of
Indian river systems.
The study uses the HadRM2 daily weather data todetermine the spatio-temporal water availability in the
river systems. A distributed hydrological model namely
SWAT has been used.
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 3/38
METHEDOLOGY The climate change impact assessment on water resources
can be best handled through simulation of the
hydrological conditions that shall prevail under the
projected weather conditions in an area.
The SWAT water balance model is one such model and
has been used in the present study to carry out the
hydrological modeling of the river basins of the country.
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 4/38
SWAT The SWAT model simulates the hydrologic cycle at daily
time basis.
SWAT is a distributed , continuous, hydrological modelwith an Arc View GIS interface(AVSWAT). The interface
is used for pre and post processing of the data and outputs.
It is used to predict the impact on climate change on the
availability of water resources under GHG with theassumption that land use will not change with time.
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 5/38
DATA
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 6/38
WEATHER DATA
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 7/38
DIGITAL ELEVATION MODEL
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 8/38
DILINEATION OF THE RIVER
BASINS It is done by using DEM as input and the final outflow
point on the drain age of the river basin as the final
pour/drainage point.
River basins have been divided into sub basins using an
arbitrarily selected threshold value.
It also provides the number of the sub basins the river
basins got subdivided into as a result of this threshold. The total area of the river basin as obtained from the
automatic delineation has also been provided.
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 9/38
MODELLED RIVER BASIN ALONG WITH RCM
GRID LOCATIONS
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 10/38
RESULTS OF BASIN ANALYSIS
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 11/38
LAND COVER OR LAND USE LAYER Classified land cover data (13 categories) produced by the
university of Maryland Global land cover facility, using
remote sensing with resolution of 1km grid cell has been
used.
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 12/38
SOIL LAYER Soil map adopted from FAO digital map of the world and
derived soil properties with a resolution of 1:5000000
have been used.
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 13/38
CONTROL CLIMATE
SCENARIO Represents the simulated baseline weather conditions.
Simulated using SWAT model by using this generated
daily weather data (HadRM2). Simulated weather report has been used for control period.
The model represents detailed outputs on flows, actual
evapotranspiration, soil moisture status at daily level.
Additional subcomponents of the total water balance suchas surface runoff, inter flow, sub surface runoff etc.
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 14/38
GHG CLIMATE SCENARIO Using GHG climate scenario data without changing
the land use.
Detailed analysis have been performed on the river
basins to quantify the impacts at the sub basin levels.
Shorter time interval in the month has been used.
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 15/38
SUMMARY RESULTS ON CLIMATE IMPACT
CHANGE ON INDIAN RIVER BASINS
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 16/38
ANNUAL WATER BALANCE COMPONENTS
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 17/38
KRISHNA RIVER BASIN
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 18/38
KRISHNA RIVER BASIN The variation in mean annual water balance components
from control to GHG scenario both in terms of change in
individual values of these components and percentage of
change over control.
Reduction in precipitation by about 20% of the current
value has been predicted in the sub basins of Krishna.
Decrease in water yield over the sub basins is predicted tovary from 30% to 50%.
Actual evapotranspiration is predicted to reduce by about
5% over most of the basins.
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 19/38
DROUGHT ANALYSIS Used for the assessment of drought severity by indicating
relative dryness or wetness.
PDSI is the widely used index that incorporates
information on rainfall, land use and soil properties in the
lumped manner.
PDSI value below 0 indicates the beginning of drought
situation and value below -3 indicates severe droughtcondition.
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 20/38
DROUGHT ANALYSIS
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 21/38
DROUGHT ANALYSIS
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 22/38
MAHANADI RIVER BASIN
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 23/38
MAHANADI RIVER BASIN
It has been selected as the one which has been
predicted to have maximum impact on account of theflood conditions.
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 24/38
MAHANADI RIVER BASIN
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 25/38
MAHANADI RIVER BASIN
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 26/38
MAHANADI RIVER BASIN
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 27/38
MAHANADI RIVER BASIN
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 28/38
MAHANADI RIVER BASIN
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 29/38
MAHANADI RIVER BASIN
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 30/38
MAHANADI RIVER BASIN
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 31/38
MAHANADI RIVER BASIN
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 32/38
MAHANADI RIVER BASIN
FLOOD ANALYSIS
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 33/38
MAHANADI RIVER BASIN
FLOOD ANALYSIS
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 34/38
ADAPTATION ISSUES Strategy for copying with the climate change impacts
on water resources can be no different from the
present day strategy of copying with the ever
increasing demands on the precious resource.
The best way forward is to incorporate such
interventions through a unified framework which can
be conductive to integrated approach.
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 35/38
COPYING ACTIVITIES MAY INCLUDE
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 36/38
GAPS AND FUTURE DIRECTION OF
STUDIES The hotspots have been identified only with respect to
the natural boundaries in the form of sub basins of the
river systems.
Another gap which shall be required to be addressed
in an institutional capacity building at various levels.
The creation of unified framework and its
maintenance shall be a gigantic task which can beachieved only through major policy restructuring of
the institutions at different levels of management.
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 37/38
CONCLUTION
7/30/2019 Climate Change Impact Assessment on Hydrology of Indian
http://slidepdf.com/reader/full/climate-change-impact-assessment-on-hydrology-of-indian 38/38
THANK YOU