SIYALU (Spring)
Siyalu yindzawo lapho kucubuka khonaemantimhlaba (groundwater) ([1] lasukaengungumanti (Aquifer)[2] acubukele ngetulu kwemhlaba. Imvama siyalu sibangelwa kuphakama kwelivutelo (Water table)[3] libe ngetulu kwemhlaba, lokubangela kuvuta kwemanti asukaengungumanti enyukele ngetulu kwemhlaba. Kungako indzawo levamise kuba nesiyalu kuyindzawo lesigodzi (Valley).
Siyalu lesicubuka ngephasi kwesihlahla.TINHLOBO TETIYALU
- Tiyalu Letingashi (Perennial Springs) : Leti tiyalu letigijima sonkhe sikhatsi,busikanelihlobo.
- Tiyalu Letishako (Intermittent Springs): Leti tiyalu letigijima emvakwemvula noma ehlobo nalilinyentilitulu.
KUBALULEKA KWETIYALU
Emanti Ekunatsa
Tiyalu tibaluleke ngekutsi ngutona lapho bantfu netilwane batfola khona emanti ekunatsa. Etindzaweni letinyenti tasemakhaya tiyalu takhelwa kahle kute bantfu batowukhona kutfola emanti ekunatsa.
Kunisela
Etindzaweni lapho kulinywe khona tiyalu tibaluleke kakhulu nakhona, ngoba kudvonswa emanti advonselwe emasimini nasetivandzeni. Lokusho kwekutsi ekondleni bantfu netilwane tiyalu tibaluleke kakhulu.
Kwelapha
Emanti esiyalu abaluleke kakhulu ekwelapheni. Tive letinyenti e-Afrikha tikholelwa ekutsini emanti esiyalu ahlobile, ate kungcola, ngako-ke ayakhona kumelapha lowo lowanatsako, kumbe ageze ngawo. Loku kuliciniso kakhulu eluhlobeni lwesiyalu lokutsiwa ngumanzana (Hot spring) lokusiyalu lesicubuka emanti lafudvumele, lokukholelwa kwekutsi kugeza kuso kuyamelapha umuntfu.
