Tiago B. Ramos

Tiago B. Ramos
Technical University of Lisbon | UTL · Centre for the Environment and Maritime Technologies (MARETEC)

PhD

About

60
Publications
15,535
Reads
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1,378
Citations
Additional affiliations
February 2014 - December 2020
Technical University of Lisbon
Position
  • Researcher
January 2010 - January 2014
University of Lisbon
Position
  • PhD Student

Publications

Publications (60)
Article
The occurrence of shallow saline water tables in arid zones provides for groundwater-fed natural vegetation and for a substantial amount of irrigated crops’ water needs. This is the case of the Hetao plain, upper Yellow River Basin, Inner Mongolia, China, where one of the major irrigation systems of China and the World is installed. As reviewed, nu...
Article
Full-text available
Citrus is one of the most valuable crops in Syria, with the largest production areas in the Tartus and Latakia provinces. Water-saving policies have been adopted to modernize the irrigation systems and increase water productivity. Following dedicated research, this study aimed to evaluate the water balance in clementine trees irrigated with diverse...
Conference Paper
Full-text available
The short review reports a selection of innovations that successfully countered soil salinisation. We reviewed different case studies at the farm-level, in order to be able to identify strategies and define a framework to deal with soil salinisation in Europe.
Article
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Hydrological modeling is nowadays critical for evaluating the status, past trends, and future perspectives of water availability at the global, regional, and local scales. The Iberian Peninsula is registering more frequent and severe droughts and water scarcity caused not only by extreme meteorological events, but also by increased demand for water...
Article
Water scarcity and saline stress are primary threats for water use and agricultural production in arid and semi-arid regions, such as the Hetao Irrigation District, China. The current study, using irrigation with saline water, developed through three seasons (2017–2019) of field experimental surveillance of mulched maize water use in two cropped we...
Article
Full-text available
Vineyards represent complex Mediterranean agrosystems that deliver significant ecosystem services to society. Yet, many vine-growers still need to assimilate the importance of crop and soil management to the conservation of soil and water resources. The main objective of this study was to evaluate water use and the water balance terms in rainfed an...
Conference Paper
Full-text available
A condutividade eléctrica (CE) é um dos parâmetros mais usados para diagnosticar a salinidade do solo e estimar a concentração de iões no solo. A determinação da CE do solo pode ser realizada no extrato de saturação de uma pasta de solo saturada (CEe) ou em extratos aquosos do solo com diferentes proporções solo:água. O primeiro método é considerad...
Conference Paper
Full-text available
The EMI method provides enormous advantages over traditional methods of soil sampling because it allows in-depth and non-invasive analysis, covering large areas in less time and at a lower cost. However, a proper interpretation of the EMI inversion models in terms of soil salinity dynamics is usually difficult owing to the fact that σ is a complex...
Article
Jute mallow (Corchorus olitorius L.) is an annual crop grown for human consumption of its nutritious leaves in many regions of the world. Despite its importance for household food security and farmers’ income, reliable information on the crop’s water requirements is still quite scarce. To overcome this knowledge gap, the irrigation needs of jute ma...
Article
Full-text available
The success of an irrigation decision support system (DSS) much depends on the reliability of the information provided to farmers. Remote sensing data can expectably help validate that information at the field scale. In this study, the MOHID-Land model, the core engine of the IrrigaSys DSS, was used to simulate the soil water balance in an irrigate...
Article
Full-text available
Wildfires are an increasing threat in the Mediterranean region, causing frequent losses of goods and human lives. Not only are wildfires a concern due to their immediate effects on vegetation and soil, but they can also have substantial impacts on surface water quality. Approximately one-third of the world’s largest cities obtain their drinking wat...
Conference Paper
Full-text available
Climate change, land use and management malpractices are increasing the areas of salt-affected soils, threatening soil health and economical sustainability of farms. The causes and processes are manifold and variable in space and time. There is the need to continuously update strategies to tackle salt-affected soils, finding solutions tailored at d...
Article
en Many agro‐environmental studies focusing on the efficient management of soils and water resources make use of soil water simulation models. Reliable soil hydraulic properties are critical for ensuring the accuracy of model simulations. However, soil hydraulic parameters in northern China are generally derived using external pedotransfer function...
Article
Full-text available
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-d...
Article
Lezíria Grande is an important agricultural area in Portugal, prone to waterlogging and salinity problems due to the influence of estuarine tides on groundwater dynamics. Simple, non-invasive, practical approaches are need for monitoring soil salinity in the region and preventing further degradation of soil resources. The objective of this study wa...
Article
IrrigaSys is a decision support system (DSS) for irrigation water management based on online, open source tools. The aim of this paper is to describe the structure of IrrigaSys and how it is implementation at the plot scale. The DSS includes remote access to local meteorological stations for weather conditions, a meteorological model for weather fo...
Article
Full-text available
This study describes an integrated modelling approach to better understand the trophic status of the Montargil reservoir (southern Portugal) under climate change scenarios. The SWAT and CE-QUAL-W2 models were applied to the basin and reservoir, respectively, for simulating water and nutrient dynamics while considering one climatic scenario and two...
Chapter
Full-text available
This minipaper assesses the strategies that can be used to prevent, reduce or adapt to soil salinity at farm level, identifying their sustainability and innovation potential. We begin with a resume of the available strategies and then present the strategies with high innovation potential discussing their limits and advantages, challenges and opport...
Conference Paper
Full-text available
Agriculture is the largest water consumer, with 70% of the diverted water used in irrigation, and is a key source of diffuse pollution, promoting eutrophication and biodiversity loss. WATER4EVER Project (http://water4ever.eu/) aims to increase irrigation water and fertilization efficiencies through precision farming. The project has a technological...
Article
Forest fires have intensified in the Mediterranean area over the last decades, becoming increasingly destructive. Catastrophic wildfires, such as the ones that occurred on the Portuguese territory during 2017, have emphasized the need for developing management tools capable of rapidly assessing their impact on downstream water bodies. This study fo...
Article
Soil and water salinity and associated problems are a major challenge for global food production. Strategies to cope with salinity include a better understanding of the impacts of temporal and spatial dynamics of salinity on soil water balances vis-à-vis evapotranspiration (ET) and devising optimal irrigation schedules and efficient methods. Both s...
Article
The coastal area of the Syrian Akkar region is particularly suitable for intensive vegetable production, and Zucchini squash (Curcubita pepo L.) is one of the most profitable crops grown there. Local agricultural policies have been especially concerned at improving irrigation water management in the region by rationalizing water and nutrient use, m...
Article
Study region: Guadiana international catchment, located in the Iberian Peninsula. Study focus: The Guadiana River catchment has registered an intense and speed up modification of its natural regime over the last few decades to cope with water scarcity. Such modifications pose a serious challenge to the development of improved management tools as in...
Article
Deficit irrigation practices carried out in very high-density olive orchards grown in the Alentejo region of southern Portugal can bring important economic benefits in terms of water savings, yields, and oils. They can also result in serious salinization/sodification problems without proper management of soil and water resources. The main objective...
Article
Full-text available
The Enxoé reservoir has been exhibiting frequent high chlorophyll-a concentrations (reaching a geometric mean six times the national limit for eutrophication of 10 μg L−1) since 2000, and represents the reservoir with the highest eutrophic state in Portugal. Toxic algal blooms have also been observed, which pose serious challenges to water managers...
Article
Full-text available
This study assessed the impact of climate change on the hydrological regime of the Paraguaçu river basin, northeastern Brazil. Hydrological impact simulations were conducted using the Soil and Water Assessment Tool (SWAT) for 2020–2040. Precipitation and surface air temperature projections from two Regional Climate Models (Eta-HadGEM2-ES and Eta-MI...
Article
Full-text available
This paper describes an integrated modelling approach to study water use vulnerability in a typical Mediterranean basin under different climate change projections. The soil water assessment tool (SWAT) and the MOHID (from modelo hidrodinâmico) Water model were used to evaluate the impacts of two climate scenarios (GFDL-ESM2M and IPSL-CM5A-LR) on wa...
Article
Full-text available
The Enxoé reservoir in southern Portugal has been exhibiting the highest trophic state in the country since its early years of operation. The problem has attracted water managers’ and researchers’ attention as the reservoir is the water supply for two municipalities. Extensive research was thus conducted over the last few years, including field mon...
Article
This paper analyses the performance of sub-optimal irrigation schedules obtained daily by solving a multi-objective optimization problem with updated weather measurements and forecasts. The approach was tested using five crops at four European locations with contrasting weather conditions. Four- and 6-day Global Forecast System (GFS) forecasts were...
Article
Full-text available
Hydrological modeling at the catchment scale requires the upscaling of many input parameters for better characterizing landscape heterogeneity, including soil, land use and climate variability. In this sense, remote sensing is often considered as a practical solution. This study aimed to access the impact of assimilation of leaf area index (LAI) da...
Article
Full-text available
Water resources are impacted by several stressors like overpopulation and over consumption that compromises their availability. These stressors are expected to progressively intensify due to climate change in most regions of the world, with direct impact on watersheds and river systems. This study investigates the effect of different watershed pres...
Article
Full-text available
The Paraguaçu watershed in northeastern Brazil faces increasing water scarcity, with water resources unable to meet the increasing demand. Accurate assessment of water availability is thus essential for efficient planning and management of local resources. In this work, the potential of the SWAT model for predicting daily and monthly variability of...
Article
Full-text available
The southern Iberian Peninsula is characterized by evergreen oak woodlands (locally known as montado), which constitute an important savanna-type agro-silvo-pastoral ecosystem. This ecosystem is facing a progressive decline for several reasons, with the foremost being overgrazing. Better management tools are necessary to accurately quantify the sys...
Article
Full-text available
The Enxoé Reservoir was built in 1998. Since 2000, it has exhibited frequent high chlorophyll-a concentrations, reaching a geometric mean three times higher than the national limit for eutrophication, presenting the reservoir with the highest eutrophic state in Portugal. Toxic algal blooms have also often been observed, which pose serious challenge...
Article
Nowadays there is an increasing effort for raising global awareness for the importance of soils to ensure food security, to improve agricultural and environmental planning and monitoring, and to establish effective and sustainable land management policies to counteract soil degradation. This study presents the INFOSOLO legacy database as the first...
Article
Full-text available
Enxoé is a small temporary river with a flushy regime, which flash floods carry significant loads to the reservoir. As a result, the reservoir, which supplies 25,000 inhabitants, exhibits a high trophic state and cyanobacteria blooms since its construction in 1998, with water abstractions requiring extensive treatment. This study aimed to understan...
Article
The southern European region faces increasing pressure on fresh water resources due to economic development and climate change. Integrative modelling operational tools capable of simulating the full soil-water-atmosphere transfer system are needed to improve agricultural water management at the plot scale. In this study,the MOHID-Land model was use...
Article
Relatively low-lying zones of natural vegetation within irrigated areas are not only carriers of biodiversity but also dry drainage areas of excess water and salts applied to nearby croplands. It is thus useful to have a correct understanding of the soil water-salt dynamics and plant water use for keeping the sustainability of those natural areas....
Article
Soil salinization is an increasing threat in agricultural water scarce regions, where even saline irrigation waters can be seen as an important resource. The sustainable use of these waters requires a precise knowledge of the processes involved, with modeling assuming a critical role in irrigation water management. The objective of this study was t...
Article
Water distribution in sprinkler irrigation systems remains one of the most challenging problems in irrigation water management. Due to lack of water distribution uniformity, parts of a field may be over-irrigated while others may be under-irrigated, thus affecting root water and nutrient uptake and crop yield. The objective of this paper was to sho...
Article
Groundwater recharge and capillary rise are key factors in water balance and management studies carried out in irrigated areas with shallow groundwater tables. In this study, the mathematical model SWAP-EPIC was applied to analyse the processes of groundwater recharge and capillary rise in the Hetao Irrigation District of the upper Yellow River bas...
Article
The temporal variability of particulate (POC) and dissolved (DOC) organic carbon concentrations was analyzed in the Enxoé temporary river, southern Portugal, between September, 2010 and August, 2013. The overall aim was to study the variability of those elements during storm events, and determine their origin and the main transfer mechanisms to the...
Article
The model HYDRUS-1D was used to simulate soil water dynamics of full and deficit irrigated maize grown under a rainout shelter during two crop seasons. Four irrigation treatments were established based on the amount of water applied to fulfil crop water requirements. Treatment D1 was irrigated to fully satisfy crop water requirements, while treatme...
Article
Limited knowledge of the hydraulic properties of semi-arid Cape Verde soils makes the use of water balance models difficult. In this paper, the water retention characteristics of agricultural soils of Santiago Island and the development of point pedotransfer functions (PTFs) to improve irrigation management are investigated. Soil water retention cu...
Chapter
Full-text available
This chapter provides a brief overview of multicomponent solute transport models, which simulate the subsurface transport of multiple ions that may mutually interact, can create various complex species, can compete with each other for sorption sites, and/or can precipitate or dissolve. These models are broadly divided into two major groups, those w...
Article
Hydrological modellers have recently been challenged to improve watershed models by better integrating soil information into model applications. Reliable soil hydraulic information is thus necessary for better describing the water balance components at the catchment scale. Frequently, that information does not exist. This study presents a set of cl...
Article
The irrigation districts of the upper Yellow River basin face a progressive reduction of water allocation and the need to apply water-saving practices due to increasing water scarcity. The adoption of such practices will lead to lower water tables, hopefully in conjunction with controlled soil salinity levels and improved crop yields. However, exce...
Article
Soil salinization and non-point source pollution are among the most important and widespread environmental problems in European Mediterranean regions. Sweet sorghum (Sorghum bicolor (L.) Moench var. saccharatum) is a moderate to high salinity tolerant crop with low water and nutrient needs, seen as an alternative to grow in the water scarce regions...
Article
The need for reducing irrigation water demand and non-point source pollution all across Europe has made sweet sorghum [Sorghum bicolor (L.) Moench], due to its lower water and nutrient requirements, an interesting alternative to other traditional summer crops in European Mediterranean regions. HYDRUS-2D was used to model the fate of nitrogen in a p...
Article
Soil salinization, sodification, and non-point source pollution are among the most important and widespread environmental problems in agricultural regions with scarce water resources. Models evaluating these environmental problems should therefore consider an integrated approach to avoid favoring one problem over the other. The HYDRUS-1D software p...
Article
Salinization and nitrate leaching are two of the leading threats to the environment of the European Mediterranean regions. Inefficient use of water and fertilizers has led to a nitrate increase in the aquifers and reduction in crop yields caused by salts. In this study, a triple emitter source irrigation system delivers water, salt (Na+), and ferti...
Article
Full-text available
A variety of analytical and numerical models have been developed during the past several decades to predict water and solute transfer processes between the soil surface and the groundwater table. While many models quantifying solute transport in soils usually consider only one solute and severely simplify various chemical interactions, others such...
Article
Full-text available
Many applications involving variably saturated flow and transport require estimates of the unsaturated soil hydraulic properties. Numerical inversion of cumulative infiltration data during transient flow, complemented with initial or final soil water content data, is an increasingly popular approach for estimating the hydraulic curves. In this stud...

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Projects (3)
Project
In this Special Issue, we are soliciting research or manuscripts advancing on soil salinity measurement, modeling of soil salinizaiton processes through the use of numerical tools at different scales, modelling and mapping using proximal soil sensing and remote sensing sensors, and other upscaling procedures used for soil salinity assessment and management. For more information see https://www.mdpi.com/journal/land/special_issues/0D2H422FY0
Project
This project proposal aims to provide a set of tools to help forest managers in the post-fire decision-making, and therefore adequately implement mitigation measures. These tools consist in the soil erosion risk estimations in case of a wildfire, followed by a proposal of several emergency solutions for soil protection and impact reduction, considering various environmental and socio-economic restrictions (e.g. climate change, costs, burn severity). In this sense we propose the test of several soil erosion models, and the one that best fits the national reality will be used as a base of a tool to support forest management decision-making. Similarly to an emergency plan, the soil erosion risk after a wildfire maps will become available, together with a vulnerability report and a proposal of mitigation measures for burned areas. Besides that, the online tool will become available to aid the forest management decision-making, that not only calculates the best mitigation investment scenario as also provides the information of the applicable laws and recommendations regarding other traditional management practices.
Project
ECOPOTENTIAL is a large European-funded H2020 project that focuses its activities on a targeted set of internationally recognized Protected Areas, blending Earth Observations from remote sensing and field measurements, data analysis and modelling of current and future ecosystem conditions and services. ECOPOTENTIAL considers cross-scale geosphere-biosphere interactions at regional to continental scales, addressing long-term and large-scale environmental and ecological challenges.