Siyom
The Siyom rises in the Pari Mountains of the eastern Himalaya, where the streams called Si and Yom form its headwaters. It winds east and south through mountain country before joining the Siang near Pangin. The river passes through lands inhabited by Memba, Ramo, Pailibo, Bokar and Bori communities, gathering numerous smaller streams along its course. Its narrow valleys open towards the much larger Siang and the Brahmaputra basin beyond.