| 1. | This forms an underground channel that becomes a lava tube.
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| 2. | The pond is recharged by water flowing in through an underground channel.
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| 3. | It is connected to the sea by underground channels, and is quite salty.
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| 4. | Water was transported from it using underground channels.
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| 5. | Both lakes are said to be connected with underground channels to the Adriatic Sea.
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| 6. | Since then, the river water flows through an underground channel to the Oostplein.
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| 7. | The tank is connected to Vaigai River through an ingenious system of underground Channels.
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| 8. | There is always something mysterious happening on the mountain, which has an underground channel.
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| 9. | It is here that the river disappears into underground channels, leaving behind a gorge.
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| 10. | The vertical shafts support construction and maintenance of the underground channel as well as air interchange.
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