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Naulin, M., Albers, T.. Feasibility Study for Optimisation of Land Drainage by Using Renewable Energy. In: Schwarzer, K., Schrottke, K., Stattegger, K. (eds.). From Brazil to Thailand - New Results in Coastal Research. Coastline Reports (16), pp. 127-133. EUCC - Die Küsten Union Deutschland e.V., Rostock, 2010.


Water management at the coasts secures the drainage of the marsh region along the North Sea as part of flood protection and to guarantee a productive agriculture. Changes in coastal morphology such as silting of the outer deep and climatic changes such as the sea level rise will lead to degradation or renunciation of natural drainage. A conventional solution, replacing sluices by coastal pumping stations represents an intervention with a high energy demand. This results in great financial burdens for the drainage associations since the cost of energy is increasing rapidly. The aim of this study is to analyse sustainable solutions in order to optimise the land drainage in coastal regions by using renewable energy.

The historical development of drainage methods shows that wind-driven pumps are highly relevant for the drainage of the land. For this reason, analyses of the energy demand of a pumping station and the supply of wind energy were carried out over a period of three years in the coastal regions of the North Sea in Dithmarschen. It was found that there is a relation between the investigated quantities and as a result it could be shown that the energy demand of a coastal pumping station could be predominantly supplied by a wind energy plant. In addition a feasibility study was carried out for an investigation area in Dithmarschen in Northern Germany. Three alternatives to use wind and/or hydro power were reviewed for feasibility and evaluated on the basis of calculations of economic efficiency. The analysis indicated that electric wind pumping systems were highly appropriate for use in sustainable drainage systems.
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