Optimizing water resources management in rainfed agricultural production systems requires the reasonable choice of crops. The adoption of crops diversification is promoted to increase the agricultural production. The objective of this study is : (i) to identify mixed crops within agricultural fields and, (ii) to evaluate the biomass production and the water productivity in the Lebna watershed (Cap-Bon, Tunisia) using remote sensing and field measurements.

In Mediterranean oak-savannas (known as Dehesas in Spain), it is vital to understand the interactions between vegetation structure and local climate regulation at scales relevant to farm management and the dominant hydrological regime. We evaluated the water use patterns of dehesa vegetation patches (open grasslands, lowland grasslands with high soil moisture, tree + grass, and riparian vegetation) to analyze the spatial and temporal resolution needed for the different management levels.

The Neste Canal (France) was built during the 19th century to satisfy multiple uses, which have since highly changed, calling into questions about its function. But this old hydraulic work can help the territories to adapt, if reforms are carried out: its future depends on the political recognition of its contribution to the rivers’ minimum water flows, the introduction of a payment for this ecological function, and changes in the hydraulic regulation system.

Natural and anthropogenic causes of coastal environmental change are significantly linked to the sediment dynamics of the coastal lagoon on the North African coast, through both the variability of continental input and the coastal marine geomorphology. Temporal analysis of the aerial and orbital photogrammetry suggests that ~ 70 % of the Ghar El Melh coast.

This work evaluated the impact of irrigation downstream of reservoirs in agricultural basins It was found that the impact of irrigation due to return flows is not homogeneous across the stream and varies between seasons Results indicates that although the effect of the dam construction is the reduction of the flow in the channel, this can be partially reversed under certain conditions: particularly during the dry season and in sections with significant accumulation of irrigation return flows

Unsustainable use of water and climate change will exacerbate the already existing tensions on resources. Innovative technologies (wireless sensor networks) were developed and tested in field through a participatory approach within two Mediterranean irrigated systems. We believe that the adoption of such technologies could contribute to improve irrigated systems sustainability by promoting sparing water use, helping maintain agricultural production and improving water users’ working conditions.

It is very important to have accurate estimation of the total area of citrus plots. To achieve this objective, we performed crop classification using Sentinel-1 and -2. Additionally, ETa was available, so we tried to find it is potential relation with NDVI. The results were obtained with the classifier SVM using GEE Google Earth Engine and provided a significant contribution to the citrus crop classification also highlighted the potential to extrapolate accurate ET estimation to larger scales.

This paper presents the RDSAR, SAR/SARin & FF-SAR altimetry processors available in the ESA Altimetry Virtual Lab (AVL) hosted on the EarthConsole® platform. An overview on processors and features as well as preliminary analyses using AVL output data are reported to demonstrate the quality of the ESA Altimetry Virtual Lab altimetry services in providing innovative solutions to the radar altimetry community. https://earthconsole.eu//

Actual evapotranspiration is an important compound of water and energy balance systems. Two models were used, the Surface Energy Balance System (SEBS) combines remote sensing data and meteorological in-situ data to solve the energy balance equation and assess AET. A hydrological balance model, the Backet Botton Hole (BBH) uses Hydrological and rainfall in-situ data. Results indicate an overestimation of AET-SEBS compared to AET-BBH which are consistent with results found by other researchers.

Water resources management traditionally relies on the use of in situ data. Spatial altimetry data is a new source of data for water resources monitoring. Through two projects, various partners (BRLi, IRD, CNES, CLS, CNRS, CENEAU) developed a method based on the combination of hydrological models, in-situ and satellite data to enhance the use of spatial altimetry data for water resources management. This article proposes to evaluate the implemented method.

Brazil needs water supply alternatives to meet Sustainable Development Goals and to guarantee access to water for all. Rainwater Harvesting Systems (RHS) are a possible alternative and are one of the important recommendations in the New Brazilian Water and Sanitation Regulation. So it is important to evaluate RHS performance in small and medium cities (with high percentage of people without access to safe water) and the influence of uncertainties, especially in the socio and economic aspects.

A 6400 m³ on-farm storage basin was built along a wadi in pre-Saharan Morocco to store floodwater for date palm irrigation. Its effect on the water table is confirmed by monitoring surface and groundwater levels and modeling the spatiotemporal variability of the recorded flood-induced piezometric mound. We show that beneficial replenishment of the water table is localized (radius < 360 m) and decreases over time due to the basin siltation reducing its storage capacity and permeability.

Agent-Based Models (ABMs) are an alternative modelling approach to traditional models that neglect important dynamic and heterogeneous social aspects. In ABMs, agents are represented according to their goals, actions, and perception of their environment. We use water demand data to model distinct cooperative and non-cooperative farmers and regulators as agents in an ABM application to the Formoso River Basin in Brazil, a basin with intense agricultural activity and conflicts among water users.

A scientific model to simulate river discharges in un-measured locations is made available via a service on the web for end-users. It is shown how this allows an increasing uptake by non-modelers, for the benefit of hydrological assessments and management.

Fair and safe allocation of natural resources for the Euro-Mediterranean area, especially for semi-arid regions, strongly relies on the adoption of WEFE (Water Energy Food Ecosystem) Nexus strategies. Transitioning to WEFE Nexus requires novel quantifiable assessment for interlinked analysis of the four WEFE sectors. Several indicator-based tools exist for agricultural sustainability at the farm scale. This contribution investigates on the application of IDEA method for WEFE Nexus approaches.

We present the principles intended to achieve maximum irrigation efficiency with the use of decision support systems, which generalize our experience in irrigation management in Ukraine. Relying on pressure indicator of moisture content we recommend maintaining it in a narrow high range. To predict time and rate of watering we recommend to use mathematical modelling tools and remote sensing data to disseminate predictions to the areas not covered by on-site monitoring.

We simulated indexed insurance for a water utility responsible for providing water to 7.2 million people in a metropolitan region. According to our findings, an annual amount (premium) of USD 0.43, 0.87, and 1.73 should be charged per person to obtain drought coverage for three, six, and twelve months. The premium fee can be implemented in the water bills as a new strategy to pool the risk between the supplied users and the utility, to prevent them from being exposed to surcharge fluctuations.

In this study, the MPR-mHM technique was applied in four data-scarce basins in Nigeria. Remotely sensed rainfall datasets were used as model forcings to evaluate the mHM capability in reproducing observed stream discharge under single and multivariable model calibration frameworks. Overall, model calibration performances displayed satisfactory outputs as evident in the Kling-Gupta Efficiency (KGE) scores across most basins.

In 2011, the XVI World Meteorological Congress urged Members to make every effort to prevent the deterioration of climate-relevant data and to make these data available to support climate change analyses and relevant climate services. In response to the WMO call, we used the NUNIEAU software which allows the digitization of different types of paper documents by automatic recognition. This software has been used on rainfall pluviograms in Burkina Faso and Côte d'Ivoire.

The study was performed in a micro-basin of the semiarid region of the state of Ceará, Experimental and Representative basin of Funceme. The objective was to present the effects of dam construction on the groundwater recharge of the alluvial aquifer through the groundwater level (especially in the period from 2012 to 2016). The construction of dams was one of the main public policies to face drought in the state.

In this study case, water scarcity resulted from increasing water demand on the irrigation system, since groundwater became saline, and farmers were not able to adapt the cropping system in the case of perennial citrus orchards. A learning approach was developed to change the perception of local actors of the current situation of water scarcity and to reflect on the construction of collective actions for the improvement of the quality of irrigation service.

The Global Surface Water Explorer (GSWE) was combined with bathymetric and historical meteorological data to quantify water balance during the period 1984–2020 in the Primera de Palos freshwater lagoon (Southwest Spain). The results showed that the natural hydrological regime of the lagoon was modified from 1995 by water inputs from irrigation returns. Thanks to a water balance approach, these irrigation returns were quantified as the closure term of the water balance.