Carmelo Conesa García

Alteraciones geomorfológicas recientes en los sistemas fluviales mediterráneos de la Península Ibérica: Síntomas y problemas de incisión en los cauces

This work gives and overview of the recent morphological adjustments to Mediterranean fl uvial systems in Spain caused by human action. First, we discuss the main actions affecting the amount and rate of water and sediment discharge. After analyzing the current conditions of instability and natural imbalance in most of these systems, we studies the important changes observed in the morphodynamics of channels and alluvial plains. We then analyze, in detail, the marked increase in bed incision, particularly over the last decades, which has both environmental and socioeconomic impacts, in relation to the management of the hydrological resources and the different actions undertaken in watersheds and waterways.

Flood hazard factors and indexes for road stream crossings in ephemeral channels. Study applied to the coastal southern area of the Murcia Region

An important natural hazard affecting to the road networks and to the traffic in semiarid areas is caused by the flood waters in road stream crossings. The main aim of this paper is to propose a methodology for evaluating the hazard of road-ephemeral channel crossings, from exposition levels and hydrological, hydraulic and morphological criteria. This approach has been applied to the coastal southern area of the Murcia Region, obtaining 54 maps of hazard indicators for road-ephemeral channel crossings under different hydrological conditions.