Universität zu Köln

Nauditt, Alexandra ORCID: 0000-0002-9780-5280, Birkel, Christian, Soulsby, Chris and Ribbe, Lars ORCID: 0000-0003-3052-1782 (2017). Conceptual modelling to assess the influence of hydro-climatic variability on runoff processes in data scarce semi-arid Andean catchments. Hydrol. Sci. J.-J. Sci. Hydrol., 62 (4). S. 515 - 533. ABINGDON: TAYLOR & FRANCIS LTD. ISSN 2150-3435

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Abstract

Using hydro-meteorological time series of 50years and in situ measurements, the dominant runoff processes in perennial Andean headwater catchments in Chile were determined using the hydrological model HBV light. First, cluster analysis was used to identify dry, wet and intermediate years. From these, sub-periods were identified with contrasting seasonal climatic influences on streamflow. By calibrating the model across different periods, impacts on model performance, parameter sensitivity and identifiability were investigated, providing insights into differences in hydrological processes. The modelling approach suggested that, independently of a dry or wet period of calibration, the streamflow response is mostly consistent with flux from groundwater storage, while only a small fraction comes from direct routing of snowmelt. The variation of model parameters, such as the groundwater rate coefficient, was found to be consistent with differing recharge in wet and dry years. The resulting snowmelt-groundwater model is a realistic hypothesis of the hydrological operation of such complex, data scarce and semi-arid Andean catchments. This model may also be a useful tool for predictions of seasonal water availability and a basis for further field studies.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Nauditt, Alexandra UNSPECIFIED orcid.org/0000-0002-9780-5280 UNSPECIFIED Birkel, Christian UNSPECIFIED UNSPECIFIED UNSPECIFIED Soulsby, Chris UNSPECIFIED UNSPECIFIED UNSPECIFIED Ribbe, Lars UNSPECIFIED orcid.org/0000-0003-3052-1782 UNSPECIFIED
URN:	urn:nbn:de:hbz:38-235073
DOI:	10.1080/02626667.2016.1240870
Journal or Publication Title:	Hydrol. Sci. J.-J. Sci. Hydrol.
Volume:	62
Number:	4
Page Range:	S. 515 - 533
Date:	2017
Publisher:	TAYLOR & FRANCIS LTD
Place of Publication:	ABINGDON
ISSN:	2150-3435
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language NORTH-CENTRAL CHILE; ENERGY-BALANCE; WATER; UNCERTAINTY; PREDICTION; PARAMETERS; DEPOSITION; DYNAMICS; IMPACTS; REGIMES Multiple languages Water Resources Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/23507