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HYDROLOGICAL DROUGHT FREQUENCY AND CHARACTERIZATION OF THE BULGARIAN YANTRA RIVER HEADWATERS

Yordan Dimitrov

First published: 2025-08-15https://doi.org/10.5593/sgem2025/3.1/s11.16View metrics

Abstract

Hydrological droughts are formed by different processes, but how strong and heterogeneous they are, leading to different hydrological droughts characteristics and propagation. Droughts have no distinct starting date, but different methods gives a course of action that may help to identify dry signals and possible, drought conditions for drought early warning and predict to some certain level the magnitude and water required for hydrological drought recovery. We choose hydrological drought indices system that are applicable for Bulgarian economic conjuncture conditions, because of no special expensive licensed software need. Using daily variable threshold method for derive deficit and spatial drought characteristics allow us to identify vulnerable river basins, drought frequency, intensity and hydrological drought duration in the observed catchments. By doing that evaluation and characterization, more effective mitigation schemes can be recommend to benefit hydrological drought management, as well as maps for highlight regional variations and similarities in low flow regimes, drought hazards, vulnerability and risk for local communities and stakeholders (for recovery measures). The central region of our investigation is upper Yantra river basin and its main tributaries.

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Publication details

Title
HYDROLOGICAL DROUGHT FREQUENCY AND CHARACTERIZATION OF THE BULGARIAN YANTRA RIVER HEADWATERS
Authors
Yordan Dimitrov
Proceedings
25th International Multidisciplinary Scientific GeoConference Proceedings SGEM 2025, Water Resources, Forest, Marine, and Ocean Ecosystems, Vol25, Issue 3.1
Publisher
STEF92 Technology
Year
2025
Pages
123-132
SWS Citekey
Dimitrov202511123132
ISSN
1314-2704; 13142704
ISBN
9786197603811
Language
en
Publication type
Conference Paper
Proceedings contents
Open official contents
Keywords
hydrological droughtindexthresholddeficitearly warning
References2

  1. Tallaksen, L.M., van Lanen H. A. J. (Eds.) 2004. Hydrological Drought. Processes and Estimation Methods for Streamflow and Groundwater. Hydrology and Environmental Hydraulics WIMEK. Development of Water Science, Vol. 48 Elsevier.

  2. Rossi, G. 2011. Drought Risk for Water Supply Systems Based on Low-flow Regionalisation. � Ph.D. Thesis, Department of Architecture, Civil Engineering and 130 Section Hydrology, Water Resources, and Climate Resilience DOI: 10.5593/sgem2025/3.1/s11.16 Environmental Sciences University of Braunschweig, Institute of Technology and University of Florence and Faculty of Engineering.

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