Geysers! :)
Geysers: Hot water and steam periodically erupt from the ground. Hot springs: Natural pools of warm water heated by geothermal activity. Fumaroles: Openings in the earth's crust that release steam and gases.
Springs and streams provided water.
Rivers, streams, lakes, wells and springs.
Streams are bodies of water that flow continuously in a channel, often originating from springs. Springs are natural sources where groundwater emerges onto the Earth's surface. Simply put, springs are the starting points of streams.
From rivers, streams and springs. Fresh water was plentiful in Chinook territory.
Streams can have hot water if they are fed by geothermal sources such as hot springs or geysers. Underground heat from the Earth's mantle can warm the water that emerges in streams, making it hotter than the surrounding environment.
Geysers are hot springs that periodically erupt hot water and steam. They usually result from underground water being heated by magma, causing pressure to build until the water is expelled forcefully. Geysers are natural wonders that attract tourists but can also pose danger if approached too closely.
Fresh water is found in rivers, intermittent streams, springs and wells.
Generally, a geyser erupts as would a volcano, but instead of lava and ash, a geyser sprays hot water, sulfuric acid and steam. I wouldn't call a hot spring a geyser, but they are certainly related.
Plank
Either from streams/rivers flowing over soluble landscapes, or through soluble rock strata, such as bores and springs.
That sounds like a geyser. Geysers are hot springs that periodically erupt with water and steam due to underground volcanic activity causing pressure build-up. Notable examples include Old Faithful in Yellowstone National Park, Iceland's Strokkur, and New Zealand's Pohutu Geyser.