Hoʻolako wai a me ka hoʻoheheʻe ʻana o ke kūlanakauhale a me ka eli ʻana, ka ʻenekinia kūlanakauhale, ka mālama ʻana i ka wai.
Ke kaapuni a me ka hoʻomaikaʻi ʻana i ka wai i ke kila, metallurgy, nā mea kanu mana, ka hana moku, nā mea kanu wai, etc.
Nā papahana mālama wai a me ka hoʻomalu muliwai.
ʻO ka wai ʻāina mahiʻai, ka iʻa iʻa, nā mahi paʻakai, etc.