ʻO keʻano o ka mea kūʻai manuahi manuahi

Ua hoʻohana nuiʻia ka puka penstock i loko o ka pā piko kahi i loko o ka wai (ʻo ka wai wai, ka wai anuanu ke aniani , keʻaʻaʻaheleʻo Sedimentation, ka waiʻona,ʻo ka wai punawai a me ka wai maʻemaʻe, etc.. ʻO ia kekahi o nā mea waiwai nui no ka hāʻawiʻana o ka wai a me ka drainage a me nā smainage a me ka spevage a me ka stivage a me ka stivage i nā penstocks i hoʻopaʻaʻia i nā'āpana e kau ai i nā'āpana ma ke kahawai