Dynamic hydrologic modeling using the zero-parameter Budyko model with instantaneous dryness index

Biswal, Basudev (2016) Dynamic hydrologic modeling using the zero-parameter Budyko model with instantaneous dryness index. Geophysical Research Letters, 43 (18). pp. 9696-9703. ISSN 0094-8276

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Long-term partitioning of hydrologic quantities is achieved by using the zero-parameter Budyko model which defines a dryness index. However, this approach is not suitable for dynamic partitioning particularly at diminishing timescales, and therefore, a universally applicable zero-parameter model remains elusive. Here an instantaneous dryness index is proposed which enables dynamic hydrologic modeling using the Budyko model. By introducing a "decay function" that characterizes the effects of antecedent rainfall and solar energy on the dryness state of a basin at a time, I propose the concept of instantaneous dryness index and use the Budyko function to perform continuous hydrologic partitioning. Using the same decay function, I then obtain discharge time series from the effective rainfall time series. The model is evaluated by considering data form 63 U.S. Geological Survey basins. Results indicate the possibility of using the proposed framework as an alternative platform for prediction in ungagued basins.

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IITH Creators:
IITH CreatorsORCiD
Biswal, Basudevhttp://orcid.org/0000-0002-1088-7229
Item Type: Article
Uncontrolled Keywords: STREAMFLOW; CURVES
Subjects: Others > Geosciences
Civil Engineering > Soil Structure Interaction
Divisions: Department of Civil Engineering
Depositing User: Team Library
Date Deposited: 15 Nov 2016 06:31
Last Modified: 29 Aug 2017 11:38
URI: http://raiith.iith.ac.in/id/eprint/2871
Publisher URL: https://doi.org/10.1002/2016GL070173
OA policy: http://www.sherpa.ac.uk/romeo/issn/0094-8276/
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