Julio Pérez-Sánchez

Julio Pérez-Sánchez
Universidad de Las Palmas de Gran Canaria | ULPGC · Department of Civil Engineering

PhD

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36
Publications
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543
Citations

Publications

Publications (36)
Article
Hydrology teaching currently relies upon educators' background, requiring a change in training future professionals to manage water resources to address climate change, among other issues. In the teaching experience described in this paper, traditional lectures in a postgraduate civil engineering master's degree were replaced by the development and...
Article
In water bodies, sediment transport is a potential source of numerous negative effects on water resource projects and can damage environmental services. Two machine learning (ML) algorithms, the M5P and random forest (RF) models, have been explored for the first time as alternatives to the Soil and Water Assessment Tool (SWAT) model to estimate sus...
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Precipitation and temperature around the world are expected to be altered by climate change. This will cause regional alterations to the hydrological cycle. For proper water management, anticipating these changes is necessary. In this study, the basin of Lake Erken (Sweden) was simulated with the recently released software SWAT+ to study such alter...
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Study region This study is focused on 12 basins in mainland Spain where monthly series longer than 30 years of near-natural streamflow measurements are available. It covers areas with different climate conditions. Study focus The potential impact of future climate change scenarios on water resources in the Spanish basins is studied. It takes into...
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In this study, five open access gridded precipitation (GP) products (CFSR, MSWEPv1.1, PERSIANN-CDR, CMORPH, and CHIRPSv2.0) and local climate data were evaluated over the Grande de San Miguel (GSM) River Basin in El Salvador. The main purpose was to identify optional data sources of precipitation for hydrological modelling given that ground-based p...
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This study was conducted in the upper Tagus River basin (UTRB), whose available water resources are partially transferred from the Entrepeñas and Buendía reservoirs after local needs satisfaction to the Segura River basin using the Tagus-Segura water transfer (TSWT), the largest hydraulic infrastructure in Spain. This study evaluates the climate ch...
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Hydrological modelling requires accurate climate data with high spatial-temporal resolution , which is often unavailable in certain parts of the world-such as Central America. Numerous studies have previously demonstrated that in hydrological modelling, global weather reanalysis data provides a viable alternative to observed data. However, calibrat...
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Study region Peninsular Spain. Study focus Weather data are the key drivers of hydrological modelling. However, available weather data can present gaps in data sequences and are often limited in their spatial coverage for use in such hydrological models as the Soil and Water Assessment Tool (SWAT). To overcome this limitation, SWAT includes a weat...
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Magnitude and temporal variability of streamflow is essential for natural biodiversity and the stability of aquatic environments. In this study, a comparative analysis between historical data (1971-2013) and future climate change scenarios (2010-2039, 2040-2069 and 2070-2099) of the hydrological regime in the Eo river, in the north of Spain, is car...
Article
Climate change is a worldwide reality with significant effects on hydrological processes. It has already produce alterations in streamflow regime and is expected to continue in the future. To counteract the climate change impact, a better understanding of its effects is necessary. Hydrological models in combination with Indicators of Hydrologic Alt...
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The Mar Menor is a hypersaline coastal lagoon with high environmental value and a characteristic example of a highly anthropized hydro-ecosystem located in the southeast of Spain. An unprecedented eutrophication crisis in 2016 and 2019 with abrupt changes in the quality of its waters caused a great social alarm. Understanding and modeling the level...
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This study assessed how changes in terms of temperature and precipitation might translate into changes in water availability and droughts in an area in a developing country with environmental interest. The hydrological model Soil and Water Assessment Tool (SWAT) was applied to analyze the impacts of climate change on water resources of the Guajoyo...
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Adaptation to the European Higher Education Area implies a change of educational paradigm. In addition to the incorporation of academically directed activities and new tools for transmitting information, the change of approach also means new training explicitly oriented to develop the new professional competences. This paper presents the results fr...
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Wildfires in Mediterranean regions have become a serious problem, and it is currently the main cause of forest loss. Numerous prediction methods have been applied worldwide to estimate future fire activity and area burned in order to provide a stable basis for future allocation of fire-fighting resources. The present study investigated the performa...
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Best management practices (BMPs) provide a feasible solution for non-point source pollution problems. High sediment and nutrient yields without retention control result in environmental deterioration of surrounding areas. In the present study, the soil and water assessment tool (SWAT) model was developed for El Beal watershed, an anthropogenic and...
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Water availability is essential for the appropriate analysis of its sustainable management. We performed a comparative study of six hydrological balance models (Témez, ABCD, GR2M, AWBM, GUO-5p, and Thornthwaite-Mather) in several basins with different climatic conditions within Spain in the 1977-2010 period. We applied six statistical indices to co...
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Climate change and the land-use and land-cover changes (LULC) resulting from anthropic activity are important factors in the degradation of an ecosystem and in the availability of a basin's water resources. To know how these activities affect the quantity of the water resources of basins, such as the Segura River Basin, is of vital importance. In t...
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Dry spells are an essential concept of drought climatology that clearly defines the semiarid Mediterranean environment and whose consequences are a defining feature for an ecosystem, so vulnerable with regard to water. The present study was conducted to characterize rainfall drought in the Segura River basin located in eastern Spain, marked by the...
Article
A correct estimation of the instantaneous peak flow (IPF) is crucial to reducing the consequences of flash floods. An approach to estimate the IPF, obtained by combining Soil and Water Assessment Tool (SWAT) simulation and machine-learning models, was proposed and then verified by comparison with observation-based results in the Ladra river basin,...
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The availability of precipitation data is the key driver in the application of hydrological models when simulating streamflow. Ground weather stations are regularly used to measure precipitation. However, spatial coverage is often limited in low-population areas and mountain areas. To overcome this limitation, gridded datasets from remote sensing h...
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Streamflow data are of prime importance to water-resources planning and management, and the accuracy of their estimation is very important for decision making. The Soil and Water Assessment Tool (SWAT) and Artificial Neural Network (ANN) models have been evaluated and compared to find a method to improve streamflow estimation. For a more complete e...
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One of the most important problems faced in hydrology is the estimation of flood magnitudes and frequencies in ungauged basins. Hydrological regionalisation is used to transfer information from gauged watersheds to ungauged watersheds. However, to obtain reliable results, the watersheds involved must have a similar hydrological behaviour. In this s...
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In semi-arid climates, the intensities of short-duration storms (less than 60 min) usually cause the largest floods and, therefore, they are important to design and calculate engineering works and hydrological planning. The objective of this study was to obtain Intensity-Duration-Frequency curves of storms in the Segura River Basin —located in sout...
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The assessment of inflows in a water resources system is essential for the appropriate analysis of its management. These inflows can be obtained from hydrological balance models. In this paper, we intend to perform a comparative study of six lumped hydrological balance models in several basins with different climatic conditions within Spain. Lumped...
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The design of hydraulic structures and flood risk management is often based on instantaneous peak flow (IPF). However, available flow time series with high temporal resolution are scarce and of limited length. A correct estimation of the IPF is crucial to reducing the consequences derived from flash floods, especially in Mediterranean countries. In...
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Droughts and climate change in regions with profitable irrigated agriculture will impact groundwater resources with associated direct and indirect impacts. In the integrated water resource management (IWRM), managed aquifer recharge (MAR) offers efficient solutions to protect, conserve, and ensure survival of aquifers and associated ecosystems, as...
Article
Forest fires are an important distortion in forest ecosystems, linked to their development and whose effects proceed beyond the destruction of ecosystems and material properties, especially in semiarid regions. Prevention of forest fires has to lean on indices based on available parameters that quantify fire risk ignition and spreading. The present...
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The Segura River Basin is one of the most water-stressed basins in Mediterranean Europe. If we add to the actual situation that most climate change projections forecast important decreases in water resource availability in the Mediterranean region, the situation will become totally unsustainable. This study assessed the impact of climate change in...
Article
The structural water deficit suffered by the Segura basin in southern Spain trend toward unsustainability. The imbalance between the resources and the demand has been caused by the expansion of irrigated areas, the emergence of illegal new irrigated lands and pumping wells, the increase in energy cost and the bad management of water use rights by t...
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One of the many factors that leads to soil erosion is rainfall erositivity, which is a basic physical factor enabling us to understand the geomorphological processes that take place in a basin. Results worldwide have shown that the erositivity R factor of the Universal Soil Loss Equation (USLE) has a high correlation with soil loss. In the past the...
Article
Ever since the concept of sustainable development was introduced by the Brundtland Report in the late 1900s, many scientists have worked on objectively measuring sustainability based on indices. The application of these indices to water resource management makes it possible to evaluate the current state of this resource and provides a tool to help...
Article
Associated with the vision of balanced, sustainable resource management, the end of the 20th century witnessed the paradigm of Integrated Water Resources Management (IWRM), whose application was based on considering the river basin as an operating unit. The last decade has seen a preference for a scaled abstraction of this focus in which the admini...
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In recent years, many researchers have devoted their efforts to finding an objective measurement of sustainability by developing evaluation tools based on sustainability indices. These indexes not only reveal the current state of water resources in a given area but also contribute to the development and implementation of effective sustainable water...
Article
In the field of water resources management, the Water Framework Directive is the first directive to adopt an ecosystem approach, establishing principles and economic tools for an integrated management of water resources to protect, conserve and restore all water bodies. The incorporation of local authorities in this management involves quality bene...
Poster
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El acuífero del Campo de Cartagena representa uno de los principales acuíferos de la cuenca mediterránea. Sus interrelaciones con el Mar Menor en particular, y con el Mar Mediterráneo como acuífero costero, proporcionan un interés científico y una trascendencia socioeconómica importante. En este trabajo se realiza la modelación matemática tridimens...

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