<a href="https://en.wikipedia.org/wiki/Polje" class="extiw" title="en:Polje">polje</a>, “Cerknisko jezero” (jezero lake), near Otok, one of several poljes in the <a href="https://en.wikipedia.org/wiki/Karst" class="extiw" title="en:Karst">karstic</a> area of  <a href="https://en.wikipedia.org/wiki/Slovenia" class="extiw" title="en:Slovenia">Slovenia</a>. Cerknisko jezero is a geological feature: “closed depression”. Its (abundant) water is solely drained through natural <a href="https://en.wikipedia.org/wiki/Ponor" class="extiw" title="en:Ponor">ponors</a> (sinkholes in the ground, cracks and larger subterranean water ways). The polje is without water management. In wet seasons waters may rise and flood the terrain to become an intermittent  lake.
<a href="//commons.wikimedia.org/wiki/User:Martin_Windischhofer" title="User:Martin Windischhofer">Martin Windischhofer</a>
2008-07
<span class="int-own-work" lang="en">Own work</span>