Relationships between drought impacts and water storage in two different (geological) regions in Europe

– in Arbeit, nicht veröffentlichen!!! –

Problemstellung

The correlations between different drought indicators (e.g. SPI, SPEI) and the number of drought impact occurrences in Germany and England suggested that droughts propagate on different timescales through the hydrological system in both regions. The aggregation period of such drought indicators in combination with the occurrence of impacts might be a good first estimator of available water storage (and storage characteristics such as depletion rate and maximum storage) in regions with different geology.

Zielsetzung

This study hypothesizes that a relationship exists between i) drought impact occurrences, ii) meteorological drought indicators and iii) dynamic catchment storage. Additionally, the characteristics of this relationship might be explainable by the dominant geology or other catchment characteristics in each region. Kirchner (2009) presented a elegant method to derive a dynamic catchment storage solely from streamflow data. If the drought propagation and impact occurrence timescales in southern Germany are different from those in southeast England, then also differences in catchment storage between the two regions should be explorable. If so, different drought impact categories, but also the geology can be used as an explanation for different drought propagation timescales (e.g. Stoelzle, 2014).

Daten und Methoden

Extraction and analysis of drought impacts from the EDII (Germany, England). Analysis of streamflow data and application of the Kirchner-method to derive dynamic catchment storage. (Comparison of amount of impacts, drought indicator aggregation periods and storage depletion along two drought event in both regions (e.g. 2003, 1976, 1990))…

Herausforderungen

Drought impact database, programming (e.g.R, MATLAB), GIS, hydrological modeling

Betreuung

Michael Stölzle (michael.stoelzle@hydro.uni-freiburg.de, Tel: 203-67432), Sophie Bachmair

Sprache

Deutsch oder Englisch

Literatur

- Kirchner JW. Catchments as simple dynamical systems: Catchment characterization, rainfall‐runoff modeling, and doing hydrology backward. Water Resour Res. Wiley Online Library; 2009;45(2).

- Stoelzle M, Stahl K, Morhard A, Weiler M. Streamflow sensitivity to drought scenarios in catchments with different geology. Geophys Res Lett. 2014;41(17).

- Parry, Simon; Hannaford, Jamie; Lloyd-Hughes, Ben; Prudhomme, Christel. 2012 Multi-year droughts in Europe: analysis of development and causes. Hydrology Research, 43 (5). 689-706. 10.2166/nh.2012.024