Coupled Atmospheric-Hydrologic Models to Forecast Spatio-temporal Variability of Water Resources
IR@C-MMACS: CSIR-Centre for Mathematical Modelling and Computer Simulation, Bangalore
View Archive Info| Field | Value | |
| Title |
Coupled Atmospheric-Hydrologic Models to Forecast Spatio-temporal
Variability of Water Resources
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| Creator |
Goswami, P
S, Himesh |
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| Subject |
Climate Modelling
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| Description |
Investigations into long-term sustainability of water resources under dynamic
environmental and anthropogenic stress require comprehensive knowledge of coupled
atmospheric-hydrologic systems. Important scientific issues such as how a global climate
change could affect the regional hydrological regime and water resources are best
addressed through coupled atmospheric-hydrologic models. Such models can also be
used to investigate the impact of altered hydrologic conditions on climatic systems. High
resolution short-term and long-term rainfall forecasting system capable of simulating
improved rainfall field through Variable Resolution-GCM (VR-GCM) can be coupled to
hydrological model through an appropriate region specific Land Surface Scheme (LSS)
to build an integrated coupled atmospheric- hydrologic model. Emphasis will be on
incorporating sub- grid scale hydrological process of hard rock region into hydrological
model, since water resource variability (both surface and groundwater) is very sensitive
to subsurface hydrology or rainfall- infiltration dynamics of the region. The system is
envisaged to address a multitude of physical processes on different spatial and temporal
scales necessary to generate the current and future water resource scenarios within a
given basin. The output of VR- GCM (rainfall fields) for perturbed environmental
conditions will be transformed down to regional scale, either by using nested models or
statistical techniques. The resultant downscaled output (precipitation) will be used as
climatological input to integrated basin hydrological model to generate water resource
scenarios.
The main components of the coupled model will be a model of three-dimensional nonlinear
dynamics of Atmospheric General Circulation Model (AGCM) interfaced to a
hydrological model (that is representative of regional subsurface hydrology) through
common LSS. The proposed study is an attempt, first of its kind in India to study
sustainability issues of water resource on regional scale vis-à-vis environmental and
anthropogenic stress through coupled atmospheric-hydrologic model. The proposed
coupled model will be both a tool of research and an objective and cost effective tool to
study the impact of environmental and anthropogenic stress on water resource. The
present document reviews the state-of-the art in the global scientific effort to investigate
impact of climate change on hydrology through coupled atmospheric- hydrologic models
and also presents a conceptual framework for such a coupled model.
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| Publisher |
CSIR Centre for Mathematical Modelling and Computer Simulation
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| Date |
2002-01
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| Type |
Monograph
NonPeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://cir.cmmacs.ernet.in/211/1/trcm0201r.pdf
Goswami, P and S, Himesh (2002) Coupled Atmospheric-Hydrologic Models to Forecast Spatio-temporal Variability of Water Resources. Technical Report. CSIR Centre for Mathematical Modelling and Computer Simulation , C-MMACS,Bangalore 560037,India. (Unpublished) |
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| Relation |
http://cir.cmmacs.ernet.in/211/
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