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Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP) >
BVAAP Vol.20 [2012] >
BVAAP Vol.20(1) [June 2012] >
| Title: | Distributed basin-scale model for water resources assessment under different climate change scenarios |
| Authors: | Goel, M K
Sapra, Tilak Raj |
| Issue Date: | Jun-2012 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | A number of climate change scenarios predict rise in
temperature and change in precipitation characteristics in the near future
which may affect various components of water cycle, thereby changing the
availability of water in space and time. To cope up with the emerging
challenges due to climate change impact on water resources and develop
adaptation strategies, it is important to carry out detailed modeling analysis
at basin scale so that the current components of water cycle at/below the land
surface could be evaluated and future components could be predicted in the
light of various climate change scenarios. In the present modeling approaches,
it is difficult to account for the effect of various developmental activities
and climate sensitive parameters on water resources scenario in a river basin.
Therefore, a need was felt to develop a detailed model to assess various
components of the hydrological cycle in a river basin and to estimate the
demands for various purposes. To evaluate various components of the
hydrological cycle at the basin scale, a conceptual spatially distributed water
balance model has been developed. In this model, focus is given to incorporate
spatial variation of land-use, soil type, rainfall, evapo-transpiration,
physiographic characteristics, cropping pattern, irrigation development,
groundwater conditions, river network and hydraulic structures in a river
basin. GIS is employed to link the spatial data with the simulation model and
to project the model results in map form for easy visualization. The basin is
divided into grids of uniform size (~ 1 km) and model computes various
components of hydrologic cycle such as actual evapo-transpiration, overland
flow, groundwater recharge, and residual soil water content at monthly time
step for each grid. The model brings out total water availability in the basin;
water consumed by different uses; and water storage in different hydraulic
structures, in soil water zone, and in groundwater aquifer in a river basin.
The present paper gives a brief description of the developed model. Using this
model, it is possible to simulate various past, present or future hydrological
scenarios in a river basin. |
| Page(s): | 56-62 |
| CC License: |  CC Attribution-Noncommercial-No Derivative Works 2.5 India |
| ISSN: | 0975-2412 (Online); 0771-7706 (Print) |
| Source: | BVAAP Vol.20(1) [June 2012]
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