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Abstract
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| Large Dams and reservoirs change the natural flow regime and consequently cause many alterations in riparian vegetation dynamics which may be assessed at different spatial and temporal scales. In Mediterranean regions flow regulation is frequently associated with irrigation. Regulated rivers with this purpose very often show reduced discharges during the wet season when the reservoir is being filled and increased discharges during the dry season when irrigation takes place. This type of regulation frequently promotes riparian vegetation growth as soil moisture levels are increased during summer when a natural drought would otherwise limit its growth. Additionally, flow regulation by large dams promotes the aging of late seral riparian vegetation reducing the frequency of flood disturbance and consequently, the potential recruitment of pioneer species. In this work we study the response of woody riparian vegetation to flow regulation by large dams in four rivers from Central Spain: Jarama, Manzanares, Guadalix and Alberche. The aim is to quantify the annual vegetation encroachment ratios and to develop a model to understand the main controlling factors, such as floodplain and channel traits; flow regulation intensity; type of regulation; present vegetation canopy; distance to the dam; and time since dam commissioning. | |
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International
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Si |
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Congress
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European Geosciences Union General Assembly 2017 |
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960 |
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Place
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Viena (Austria) |
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Reviewers
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Si |
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ISBN/ISSN
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1607-7962 |
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Start Date
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24/04/2017 |
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End Date
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28/04/2017 |
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From page
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10274 |
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To page
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10274 |
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Geophysical Research Abstracts Vol. 19, EGU2017-10274,(2017). |