A5076955053- Hydrology and Watershed Management Studies
- Flood Risk Assessment and Management
- Hydrology and Drought Analysis
- Soil erosion and sediment transport
- Soil and Unsaturated Flow
- Water resources management and optimization
- Tree-ring climate responses
- Hydrological Forecasting Using AI
- Climate variability and models
- Cryospheric studies and observations
- Hydrology and Sediment Transport Processes
Universitat Ramon Llull
2022-2024
Observatori de l'Ebre
2020-2024
Human activities both aggravate and alleviate streamflow drought. Here we show that aggravation is dominant in contrasting cases around the world analysed with a consistent methodology. Our 28 included different combinations of human-water interactions. We found water abstraction aggravated all drought characteristics, increases 20%–305% total time across case studies, deficit up to almost 3000%. Water transfers reduced by 97%. In into catchment or augmenting from groundwater, inputs could...
The Pyrenees. Pyrenees is sensitive to changes in climate (both natural and of anthropic origin) land use cover (LULC). These can influence the water resources. historical evolution (1980–2013) stream flows are studied using observed time series from non-influenced gauging stations two models (SASER SWAT). Their comparison helps detect analyze flow rates their trends (trends computed Sen's slope estimator, significance which was evaluated Mann-Kendall test). Furthermore, it also allows...
Several factors inherently influence the accuracy of hydrological model simulations –including uncertainties in input data, parameterization, and (unavoidably simplified) representation physical processes. Among these, precipitation data used as play a crucial role they directly magnitude timing streamflows. This study aims to unravel propagation uncertainty modelling from streamflow simulations. To this end, we built semi-distributed process-based using Hydrological...
Accurate streamflow prediction is crucial for water resources management, particularly in the regions facing challenges such as scarcity and hydrological unpredictability. Physical-based models have long been used rainfall-runoff simulations by solving equations governing processes a typical watershed. In addition, Machine Learning (ML) emerged versatile data-driven approaches capable of capturing intricate patterns hydroclimatic variables, which can be prediction.The aim this study to...
The physically-based, spatially-distributed hydrometeorological model SASER, which is based on the SURFEX LSM, used to hydrological cycle in several domains Spain and southern France. In this study, modeled streamflows are validated a domain centered Pyrenees mountain range includes all surrounding river basins, including Ebro Adour-Garonne, with spatial resolution of 2.5 km. Low flows were found be poorly simulated by model. We present an improvement SASER modeling chain, introduces...
Abstract. In semi-arid irrigated environments, agricultural drainage is at the heart of three agro-environmental issues: it an indicator water productivity, main control to prevent soil salinization and waterlogging problems, related health downstream ecosystems. Crop balance models combined with subsurface can estimate quantities dynamics various spatial scales. However, such models' precision (capacity a model fit observed using site-specific calibration) accuracy approximate default input...
The SASER (SAfran-Surfex-Eudyssée-Rapid) hydrological modeling system is used for simulating the continental cycle. validation of simulated streamflow showed that results were generally accurate but with a tendency towards underestimating peak values. This underestimation has several causes, in this study, we addressed known fact precipitation forcing data produced by SAFRAN good at daily time scale, as it ingests data, its performance interpolating to hourly using relative humidity weight...
Drought is a natural phenomenon that controlled by different factors such as climate and catchment controls, in many worldwide regions, it now driven human activities (i.e., reservoirs, irrigation, groundwater abstractions). Reservoirs initially ensure water availability help cope with drought, especially semi-arid regions; however, this modification of the environment may lead to both positive negative effects on hydrological cycle, which need be understood. This involves better...
Abstract. In semi-arid irrigated environments, the agricultural drainage is at heart of three agro-environmental issues: it an indicator water productivity, main control to prevent soil salinization and waterlogging problems, related health downstream ecosystems. Crop balance models combined with subsurface can be used estimate quantities dynamics various spatial scales. However, precision (capacity a model fit observed using site-specific calibration) accuracy approximate default input...
<p>The Pyrenees are the "Water Towers" of several key river basins in France, Andorra and Spain, being Adour-Garonne Ebro largest ones. The water these is used by agricultural industrial economic sectors which have a significant socioeconomic impact. Furthermore, rivers also sustains ecosystems an intrinsic value provide ecosystem services to society. For this reason, assessment past future evolution resources necessary. Until now, assessments often been done...
<p>SASER (SAfran-Surfex-Eaudysee-Rapid) is a distributed and physically-based modeling chain. Currently, SASER has been implemented for different spatial domains resolutions. The Pyrenean application of the model at 2.5 km resolution good performance, but it can be improved. We have evaluated simulated streamflows using KGE score, which above 0.5 over 57% near-natural catchments. seen that simulates reasonably well high, not extreme, median daily streamflows, low flows peak are...
<p>The natural border between Andorra, France and Spain are the Pyrenees, a South-Western European mountain range with great environmental diversity: from Atlantic to Mediterranean climates, high mountains cliffs touching sea, humid semi-arid  conditions. Thus this region is particularly sensitive climate global change. On other hand, territory primary source of water in region, feeding runoffs recharge zones region's main catchment basins. Rapid changes...
<p>The SASER (Safran-Surfex-Eaudysee-Rapid) hydrological modeling chain is a physically-based and distributed model that has been implemented over two domains: Iberia the Pyrenees. Currently, it used for drought studies (HUMID project) water resources analysis (PIRAGUA project).</p><p>In this chain, SAFRAN provides meteorological forcing, SURFEX LSM performs energy balances Eaudyssée-RAPID simulates daily streamflow. are run at spatial...