What is it about?
Recently in Hungary, drought affects the Drava floodplain more severely than floods. The channelization of the Drava River changed the water budget of the Cún-Szaporca oxbow lakes in the floodplain. The paper presents a 3-D groundwater model for this oxbow of the Drava floodplain to gain a better understanding of the water budget of the whole system under the normal situation and for different lake replenishment scenarios. The model is developed using the finite difference code MODFLOW-2005 and calibrated with a mean error of -0.03 m, and mean absolute error of 0.08 m. Two scenarios for the replenishment of lake were analyzed. Water level is planned to be raised by 0.5 m and 1 m, for the first and second scenario, respectively. As a consequence, an increase of seepage from the lake was found. Around 65 % of the seepage recharges the groundwater system. Such a rise in groundwater table improves the sustainability of the aquifer and serves agricultural and environmental purposes. Additionally, they show the importance of the model for decision makers to select the right future management decisions.
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Why is it important?
Interactions between groundwater and surface water profoundly influence the provision of water- related ecosystem services. Floodplain areas provide places for aquatic ecosystems and shelters for bird population. Preserve and extend the mosaic pattern landscape, which is irrecoverable for biodiversity. This interaction influences water retention and the flood periods. The excess water caused reduced growth of crops, or total damage. The multi-layered sediments are crucial importance as geological background related to subsurface water dynamics. The knowledge of the role (in a hydrogeological means) of these layers is limited. Obviously, the randomly layered geological units cause anisotropy. Their position and extension modifies the velocity of subsurface flow. The optimal design of groundwater table is a complex task because of the conflicting demands of agriculture, forestry, flood control and nature conservatio
Perspectives
Writing this article was a great pleasure as it has co-authors with whom I have had long standing collaborations
ALI Salem
Minia University
Read the Original
This page is a summary of: Modeling Surface Water-Groundwater Interaction in an Oxbow of the Drava Floodplain, EasyChair,
DOI: 10.29007/hb5d.
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