Influence of reservoir management on Guadiana streamflow regime

Canuto, Nelson; Ramos, Tiago B.; Oliveira, Ana R.; Simionesei, Lucian; Basso, Marta; Neves, Ramiro

doi:10.1016/j.ejrh.2019.100628

Cited by 18 publications

(23 citation statements)

References 43 publications

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“…Several fluvial processes may alter the vegetation establishment. For the upstream Guadiana region, groundwater abstraction for agriculture can be responsible for the rising salinity levels, and declines in groundwater levels, with consequences for plant establishment [51,52]. In these river reaches, overloading of water creates fine sediment deposition in banks and riverbed, altering water turbidity and temperature and, in consequence, causing the loss of aquatic plant communities adapted to lotic conditions and diverse mesohabitats.…”

Section: Discussionmentioning

confidence: 99%

“…For instance, bat populations were affected by the disappearance of around 200 km of riparian habitats of the 'old' Guadiana river, by the homogeneous habitat created by the flooded areas that can only be used for foraging in the remaining island habitats [60]. Future rainfall projections and flow simulations are not promising of better conditions for aquatic and riparian plant communities and the future of this transnational basin can be resumed as "the dry getting drier" [52]. Seasonal and annual irregularity of rainfall are also fundamental variables for the future flow projections [52], an issue of concern addressed by an early study of Suzanne Daveau published in 1977, in relation to the first construction works of the Alqueva Dam that were taking place [61].…”

Section: Discussionmentioning

confidence: 99%

“…Future rainfall projections and flow simulations are not promising of better conditions for aquatic and riparian plant communities and the future of this transnational basin can be resumed as "the dry getting drier" [52]. Seasonal and annual irregularity of rainfall are also fundamental variables for the future flow projections [52], an issue of concern addressed by an early study of Suzanne Daveau published in 1977, in relation to the first construction works of the Alqueva Dam that were taking place [61]. This work let us know that for instance, at Pulo do Lobo, our most downstream core-site, annual median flows were 179 m 3 This study aimed to document and quantify the magnitude of impacts on vegetation and on the riverine landscape of a large reservoir in a Mediterranean river Basin.…”

Section: Discussionmentioning

confidence: 99%

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Effects of a Large Irrigation Reservoir on Aquatic and Riparian Plants: A History of Survival and Loss

Aguiar

Fernandes

Martins

et al. 2019

Water

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Dammed rivers have unnatural stream flows, disrupted sediment dynamics, and rearranged geomorphologic settings. Consequently, fluvial biota experiences disturbed functioning in the novel ecosystems. The case study is the large irrigation reservoir Alqueva in Guadiana River, Southern Iberia. The study area was divided into three zones: upstream and downstream of the dam and reservoir. For each zone, species composition and land use and land cover (LULC) were compared before and after the Alqueva Dam implementation. Data consist of aquatic and riparian flora composition obtained from 46 surveys and the area (%) of 12 classes of LULC obtained in 90 riverine sampling units through the analysis of historical and contemporary imagery. There was an overall decrease of several endemic species and on the riparian shrublands and aquatic stands, although differences in the proportion of functional groups were not significant. Nevertheless, compositional diversity shows a significant decline in the upstream zone while landscape diversity shows an accentuated reduction in the reservoir area and downstream of the dam, which is likely related to the loss of the rocky habitats of the ‘old’ Guadiana River and the homogenization of the riverscape due to the irrigation intensification. The mitigation of these critical changes should be site-specific and should rely on the knowledge of the interactions between surrounding lands, ecological, biogeomorphologic, and hydrological components of the fluvial ecosystems.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Effects of a Large Irrigation Reservoir on Aquatic and Riparian Plants: A History of Survival and Loss

Aguiar

Fernandes

Martins

et al. 2019

Water

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“…The MOHID-Land model [16,27] is an open source hydrological model; the code can be accessed from an online repository (github.com/Mohid-Water-Modelling-System/Mohid). The watershed has a population of about 150,000 inhabitants, mainly located in the cities of Santiago de Compostela, Estrada, Lalín, and Padrón.…”

Section: Model Descriptionmentioning

confidence: 99%

“…The MOHID-Land model [16,27] is an open source hydrological model; the code can be accessed from an online repository (github.com/Mohid-Water-Modelling-System/Mohid). MOHID-Land simulates the water cycle considering four compartments or mediums: atmosphere, porous media, soil surface, and river network.…”

Section: Model Descriptionmentioning

confidence: 99%

Sensitivity Analysis of the MOHID-Land Hydrological Model: A Case Study of the Ulla River Basin

Oliveira

Ramos

Simionesei

et al. 2020

Water

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Hydrological models are increasingly used for studying watershed behavior and its response to past and future events. The main objective of this study was to conduct a sensitivity analysis of the MOHID-Land model and identify the most relevant parameters/processes influencing river flow generation. MOHID-Land is a complex, physically based, three-dimensional model used for catchment-scale applications. A reference simulation was implemented in the Ulla River watershed, northwestern Spain. The sensitivity analysis focused on sixteen parameters/processes influencing water dynamics at that scale. River flow generation was influenced by the resolution of the simulation grid, soil water infiltration, and crop evapotranspiration. Baseflow was affected by soil hydraulic properties, the depth of the soil profile, and the dimensions of the river cross-sections. Peak flows were mostly constrained by Manning’s coefficient in the river network, as well as the dimensions of the river cross-sections. The MOHID-Land model was then used to simulate daily streamflow during a 10-year period (2008−2017). Model simulations were compared against measured data at four hydrometric stations characterizing the natural flow regime of the Ulla River, resulting in coefficients of determination (R2) from 0.56 to 0.85; ratios of the standard deviation of the root mean square error to observation (RSR) between 0.4 and 0.67, and Nash and Sutcliffe model efficiency (NSE) values ranging from 0.55 to 0.84. The MOHID-Land model thus has the capacity to reproduce watershed behavior at a daily scale with reliable accuracy, constituting a powerful tool to improve water governance at the watershed scale.

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Hydrometeorological Drought Forecasts

Sutanto,

Van Lanen

2024

Responding to Extreme Weather Events

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Influence of reservoir management on Guadiana streamflow regime

Cited by 18 publications

References 43 publications

Effects of a Large Irrigation Reservoir on Aquatic and Riparian Plants: A History of Survival and Loss

Effects of a Large Irrigation Reservoir on Aquatic and Riparian Plants: A History of Survival and Loss

Sensitivity Analysis of the MOHID-Land Hydrological Model: A Case Study of the Ulla River Basin

Hydrometeorological Drought Forecasts

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