He hale mana wai kahi i hoʻopaʻa ʻia ai ka wai a pau a i ʻole ka hapa nui o ka wai e nā hale mālama wai ma ka muliwai.

ʻO nā hale mana wai ʻano Dam-type e pili nui ana i nā hale mana wai e kūkulu ana i nā hale mālama wai ma ka muliwai e hana i loko o ka wai, e hoʻokaʻawale i ka wai kūlohelohe e hoʻokiʻekiʻe i ka pae wai, a hoʻohana i ka ʻokoʻa poʻo e hana i ka uila. ʻO ka hiʻohiʻona nui, ʻo ia ka puʻu wai a me ka mea kanu wai i loko o ka ʻāpana muliwai pōkole.
ʻO nā hale mana wai ʻano Dam-type he mau hale mālama wai, hale hoʻokuʻu wai, paipu kaomi, mea kanu mana, turbines, nā mea hana a me nā lako ancillary. ʻO ka hapa nui o nā hale mana wai me nā pā wai ma ke ʻano he hale mālama wai he mau kikowaena wai ʻauʻau poʻo kiʻekiʻe, a ʻo ka hapa nui o nā kahua wai wai me nā ʻīpuka e like me nā hale mālama wai, ʻo ia nā keʻena wai wai haʻahaʻa. Ke kiʻekiʻe ʻole ke poʻo wai a ākea ka muliwai, hoʻohana pinepine ʻia ka mea mana ma ke ʻano he ʻāpana o ka hale mālama wai. Ua kapa ʻia kēia ʻano hale mana wai ʻo ke kahua wai wai wai, ʻo ia hoʻi kahi hale mana wai wai.
Ma muli o ke kūlana pili o ka pā a me ka mea kanu wai, hiki ke hoʻokaʻawale ʻia nā kikowaena wai wai i ʻelua mau ʻāpana: dam-type a me ka muliwai. Hoʻonohonoho ʻia ka mea kanu wai wai ma ka ʻaoʻao o lalo o ke kino wai, a hoʻohuli ʻia ka wai ma o ka paipu kaomi e hana i ka uila. ʻAʻole mālama ka mea kanu i ke kaomi wai o luna. Ua kūkulu ʻia ka hale mana, ka pā, ke kahawai a me nā hale ʻē aʻe o ke kahua wai wai ma lalo o ka muliwai. He ʻāpana lākou o ka hale mālama wai a kau i ke kaomi wai o luna. He mea kūpono ia ʻano hoʻonohonoho i ka mālama ʻana i ka huina kālā o ka papahana.

He kiʻekiʻe maʻamau ka puʻu wai ma hope o ke kahua wai. ʻO ka mea mua, hoʻohanaʻia ke poʻo kiʻekiʻe e hoʻonui i ka mana i hoʻokomoʻia o ka mana mana, hiki ke hoʻololi pono i nā koi hoʻoponopono kiʻekiʻe o ka pūnaewele mana; ʻo ka lua, aia ka mana nui e hoʻoponopono i ke kahe kiʻekiʻe e hōʻemi i ke kaomi hoʻomalu wai o ka muliwai o lalo; ʻO ke kolu, ʻoi aku ka nui o nā pōmaikaʻi ākea. ʻO ka pōʻino, ʻo ia ka piʻi ʻana o ke kahe ʻana o ka wai i loko o ka ʻāpana wai a paʻakikī ka neʻe ʻana a me ka hoʻonoho hou ʻana o nā kamaʻāina a me nā kamaʻāina. No laila, kūkulu nui ʻia nā pahu wai ma hope o nā wai wai me nā wai kiʻekiʻe a me nā waihona wai nui ma nā awāwa mauna kiʻekiʻe, nā wahi me ke kahe wai nui a me nā kahe liʻiliʻi.
ʻO ka hapa nui o nā hale wai wai nui i kūkulu ʻia ma ka honua i koʻu ʻāina. ʻO ka mea mua ʻo ka Three Gorges Hydropower Station, me ka nui o ka mana o 22.5 miliona kilowatts. Ma waho aʻe o nā pono hana mana nui, ua loaʻa i ka Three Gorges Hydropower Station nā pōmaikaʻi piha o ka hōʻoia ʻana i ka hoʻomalu ʻana i ka wai ma waena a me lalo o ka muliwai ʻo Yangtze, hoʻomaikaʻi i ka hoʻokele a me ka hoʻohana ʻana i ka wai, a ua kapa ʻia ʻo "nā mea kaumaha o ka ʻāina."