1 The water table forms the top of the zone of saturation, where pore spaces in sediment or rock are completely filled with water. 2  Aquifers are underground areas of sediment or rock that hold groundwater. 3  In steep areas, where groundwater intersects the ground surface, a spring or seep can form.
There's a word for what you're asking for-- onomatopoeia. Many times editors would rather you not use the sounds, but describe it, unless you're writing a PB or even early chapter book. I wrote about a train in one of my short stories. As a train gets closer, it makes a rumbling sound. As it leaves the station, it makes a steadily increasing chugging sound. The whistle sounds like a forlorn call in the night. The brakes hiss and screech when the train slows down to a stop. If you don't have a train nearby to listen to, go online and do a search.
Train tracks usually consist of two, three or four or five rails, with a limited number of monorails and maglev guideways in the mix. The word 'train' comes from the Old French trahiner, from the Latin trahere 'pull, draw'. There are various types of trains that are designed for particular purposes.