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Albert P. Oost

A short introduction

27thof November 2020

Clay pits

N a a m A

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Wadden Sea: mud transport from west to east

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2000 years of clay mining

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Dike of Peins (1st BC) with Ditch of which clay was taken from the marshlands

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Wadden Sea: mud transport from west to east

Can we take another piece of

the mud cake for our dikes?

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Is local clay mining bad?

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No, less import of clay from far away

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Is local clay mining bad?

No, if clay pits are behind the dike (and add to natural values)

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Is local clay mining bad?

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Yes, if clay pits remain water- logged mining sites for many decennia (low natural values)

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Is local clay mining bad?

No, if clay pits add a plus to the natural values →

A new way of thinking!

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Is retrieving clay bad?

No, if it net adds to natural values Wadden Sea

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