Channel-reach morphometric analysis on a headwater stream in a low-mountainous region: a case study from Mecsek Hills

Author:

Víg Balázs,Varga Gábor,Balogh Richárd,Lóczy Dénes,Nagyváradi László,Fábián Szabolcs Ákos

Abstract

Small catchments in mountainous regions affect downstream rivers as a primary source of sediment supply and also generate flash swasfloods, especially during extreme events. These floods have significantly shaped the catchments of small streams in the Mecsek Hills and some rural areas over the past two decades. However, there has been no previous study examining the hydromorphology of headwater catchments in low mountain environments in Hungary. The present study was meant to investigate the fundamental hydrogeomorphological properties of a first-order catchment. A customary and detailed GIS survey of 50-metre sections was aimed at deciphering flash flood vulnerability and geomorphic interrelations within a micro watershed. We found moderate susceptibility to flash floods compared to the whole Mecsek Hills. Stable large woody debris jams were identified during the field survey as major geomorphic channel features functioning as natural barriers which drive channel evolution and reduce flood hazards.

Publisher

Research Centre for Astronomy and Earth Sciences

Subject

General Earth and Planetary Sciences,Geography, Planning and Development,Cultural Studies,Agronomy and Crop Science

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