![]() ![]() The model length was 2000 m for most scenarios and was changed only in SG-2 ( Table 1). The geometry of the base model ( Figure 1d) can be described by its length ( L), depth ( D), and topographic difference (Δ z). This approach can serve as a nature-based solution (NBS) to sustain sensitive ecosystems in changing climatic conditions. The results of the study suggest that, if water is infiltrated at the local recharge area, the water table will also increase at the corresponding discharge area, which positively effects the connected GDEs. ![]() The findings can help better understand MAR efficiency in light of local groundwater flow processes and contribute to optimising MAR systems. The water amount needed for increasing the water table is mainly influenced by the thickness of the unsaturated zone and the material properties of the aquifer. Based on the results, initial hydraulic head difference, model length, and hydraulic conductivity are the most critical parameters regarding water level increase at the discharge area. The theoretical results were applied to a close-to-real situation of Lake Kondor, a GDE of the Danube-Tisza Interfluve (Hungary), which dried up in the past decades due to groundwater decline in the area. Different scenarios were compared to analyse the groundwater level increase and the infiltrated water volumes and to assess the efficiency of MAR based on these parameters in each scenario. MAR efficiency was examined from recharge to discharge area in a simple half-basin based on theoretical flow simulations, using GeoStudio SEEP/W software. The aim of this research is to test this hypothesis by evaluating the effect of groundwater table inclination, topography, and other local characteristics on MAR efficiency from the perspective of GDE restoration. However, during groundwater-dependent ecosystem (GDE) rehabilitation, these hydraulic gradient-driven flow processes can be taken advantage of. In general, a high hydraulic gradient is not favoured for MAR implementation, as it causes higher water loss and mixing of recharge water with native groundwater. Managed aquifer recharge (MAR) is an increasingly popular technique however, the significance of groundwater flow dynamics is rarely examined in detail regarding MAR systems. ![]()
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