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<p>relationship. An example is the Hungerbrunnen in the parish of Heuchlingen near <a href="page.php?w=Gerstetten">Gerstetten</a>.</p>

<p>The properties of karst springs make them unsuitable for the supply of <a href="page.php?w=drinking_water">drinking water</a>. Their uneven flow rate does not support a steady rate of consumption, especially in summer when there is lower discharge but higher demand. In addition, poor filtering and high <a href="page.php?w=Water_hardness">hardness</a> mean that the water quality is poor.</p>

<p><big>Cultural references</big></p><p>
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