Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 400901
Title Using SIMGRO for drought analysis – as demonstrated for the Taquari Basin, Brazil
Author(s) Querner, E.P.; Lanen, H.A.J. van
Source In: Proceedings of the Sixth World FRIEND Conference on Global Change: Facing Risks and Threats to Water Resources , Fez, Morocco, 25-29 October 2010. - FEZ, Morocco : IAHS - ISBN 9781907161131 - p. 111 - 118.
Event FEZ, Morocco : IAHS - ISBN 9781907161131 Sixth World FRIEND Conference, Fez, Morocco, 2010-10-25/2010-10-29
Department(s) CWC - Integrated Water Resources Management
Hydrology and Quantitative Water Management
Publication type Contribution in proceedings
Publication year 2010
Abstract Tools were developed and tested to quantify space–time development of droughts at the river basin scale. The spatial development of a hydrological drought in river basins brings different challenges to describe drought characteristics, such as: area in a drought and areal expressions for onset, duration and severity. We used the regional hydrological model SIMGRO in a GIS framework to generate the spatially-distributed time series for the drought analysis. Droughts in different hydrological variables (recharge and groundwater discharge) were identified by applying the fixed threshold concept to the time series. The method captures the development of both the duration and the severity of the area in a drought. The GIS helps to better understand the link between areal drought characteristics and spatially-distributed catchment characteristics. Functions, like agriculture, nature or navigation in a region, need to be considered more in defining the appropriate threshold levels. It is also important to take into account varying hydrological conditions like regions with deep or shallow groundwater levels, resulting in periods with capillary rise in the unsaturated zone in the latter
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