Results 121 to 130 of about 1,121,101 (230)

Guadiana River Estuary. Investigating the past, present and future

open access: yes, 2017
Estuaries are some of the most dynamic and complex environments in the world. The places where rivers meet the sea are subject to cycles of constant change – from the waves and currents that move particles of sand and mud every second, to the daily ebb and flow of the tides and the more dramatic effects of periodic floods, droughts and storms.
openaire   +1 more source

Mud entrapment evolution on the inner shelf off the Guadiana River

open access: yes, 2018
Simposio sobre el Margen Ibérico Atlántico (9º. 2018. Coimbra, Portugal) The evolution of a mud entrapment confined to the paleo-Guadiana incised valley was investigated and interpreted in terms of environmental changes. High-resolution seismic data and a gravity core were analyzed. Two distinct intervals were identified. The lower part of the sediment
Mendes, Isabel   +8 more
openaire   +1 more source

A Fish-Based Tool for the Quality Assessment of Portuguese Large Rivers

open access: yesFishes
Multimetric indices play a pivotal role in assessing river ecological quality, aligning with the European Water Framework Directive (EU WFD) requirements. However, indices developed specifically for large rivers are uncommon. Our objective was to develop
António Tovar Faro   +2 more
doaj   +1 more source

Living on the Edge: Challenges for Freshwater Mussel Conservation in Mediterranean-Type Temporary Streams

open access: yesDiversity
Mediterranean temporary streams are characterized by high hydrological variability that climate change is expected to intensify, increasing drought frequency and severity.
María G. Álvarez   +12 more
doaj   +1 more source

New directions in water resources management: The role of water pricing policies

open access: yes, 2008
Water resources will face increasing competition and higher environmental concerns during this century. To meet these challenges, the new Water Framework Directive has drawn up an integrated framework and established the basic principles for a ...
Blanco Fonseca, Maria   +1 more
core   +1 more source

Water footprint analysis (hydrologic and economic) of the Guadiana river basin

open access: yes, 2009
In most arid and semiarid countries, water resources management is an issue as important as controversial. Today most water resources experts admit that water conflicts are often not caused by physical water scarcity but poor water management or governance. The virtual-water concept, defined as the volume of water used in the production of a commodity,
Martinez-Aldaya, Maite, Llamas, M.R.
openaire   +1 more source

West Nile virus in the Iberian Peninsula: using equine cases to identify high-risk areas for humans. [PDF]

open access: yesEuro Surveill, 2023
García-Carrasco JM   +5 more
europepmc   +1 more source

An ecohydrology model of the Guadiana Estuary (South Portugal) [PDF]

open access: yes, 2013
A 1-D ecohydrology model is proposed that integrates physical, chemical and biological processes in the Guadiana Estuary during low flow conditions and that predicts the ecosystem health as determined by the following variables: river discharge ...
Chícharo, Luís   +3 more
core  

Preface: Guadiana river estuary. Investigating the past, present and future

open access: yes, 2017
Estuaries are some of the most dynamic and complex environments in the world. The places where rivers meet the sea are subject to cycles of constant change – from the waves and currents that move particles of sand and mud every second, to the daily ebb and flow of the tides and the more dramatic effects of periodic floods, droughts and storms.
openaire   +1 more source

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