Changdondayetilganchanglarning urug‘chitumshuqchasigatushishigachanglanish deyiladi. Changlar asosan hasharotlar, shamol va boshqa yo‘llar bilan urug‘chitumshuqchasiga kelibtushadi. Changlanish 3 xil bo’ladi: Chetdanchanglanish, O’z-o’zidanchanglanish, Sun’iychanglanish