###### Abstract
Both the estimation of direct impacts on hydrological and morphological features, as well as that of the indirect impacts based on the quantification of land uses causing alterations in water and sediment quality, provide a useful approach to assess the relationship between the waterbody and its environment [11; 12]. Pressures linked to the pollution of waterbodies can have different effects depending on the land use and the type of activity in the catchment area, including eutrophication [13], increased organic pollution [14], acidification [15], or the release of specific pollutants [16], such as heavy metals, pesticides, antibiotics or other pharmaceutical and cosmetics products, the latter being among other so-called \"priority substances\" (Directive 2013/39/EC [17]). On the other hand, hydrological and morphological alterations both in the catchment and in the waterbody itself, represent specific pressures that can also alter the ecosystem ecological status. The physical, chemical, biological, hydrological and morphological features of lentic ecosystems can change as a consequence of the impact caused by the increasing pressures promoted by land use and direct alterations. The changes in the ecosystem due to these pressures and alterations could lead to an impoverishment of the biological communities [18]. Consequently, the ecological structure and functioning of these waterbodies could be altered [19; 20; 21]. The relationship between the pressure level and the response of the system to these pressures (impacts) determines the degree of affection (impact) and the consequences on the ecological condition of the waterbodies. The use of Earth Observation has shown to be an essential tool for ecosystem monitoring and assessment [22]; being especially useful for the mapping and identification of lentic ecosystems and their surrounding areas [23; 24], as well as their hydrology [25] and assessment of their water quality [26; 27]. Geographic Information Systems (GIS) techniques and available Copernicus products, such as the Corine-Land Cover maps [28; 29], can be useful information sources that can be applied to provide estimations of pressures. Thus, these tools represent an approach for the ecological status assessment. There are other resources, such as SWOS (Satellite-based Wetland Observation Service), whose tools allow for the processing of images with several specific utilities; for example, the study the land uses in the catchment area of wetlands [30]. The pressure estimation methodology based on land uses may be used as a preliminary approach to forecast the ecological status of waterbodies, especially for those not included in monitoring networks, such as, for the case of Europe, most lentic ecosystems that are not declared as waterbodies following the European Water Framework Directive (WFD, Directive 2000/60/EC [31; 32]). The correlation of the response of the ecological status metrics with the pressures level estimated from land uses and the determination of hydro-morphological alterations, may provide insights into how waterbodies respond to pressure levels, and might be extrapolated for waterbodies that are not well covered by monitoring networks, providing a direct ecological status assessment [33]. Pressure level identification could also be applied to conservation status assessment according to the Habitats Directive (HD, 92/43/EEC), not only for the structure and functions parameter but, specifically, also to provide an estimation of future prospects. All of this is especially plausible when products or tools showing the estimation of Land Uses and Land Uses Changes (LULUC), such as those available from Copernicus and SWOS, respectively, are available [34]. Therefore, land uses in the catchment area could be used as a proxy to approach the ecological health of lentic ecosystems in line with the assessment targets defined, for instance, by European regulation.