Heshiis ku saabsan isticmaalka birta, balaastigga, alwaax, iyo gidaarka qallalan.Dhererka guud: 225 mm.Ku habboon in la gooyo walxaha birta qaro weyn (2-8mm).Ku habboon in lagu gooyo qoryaha ciddiyaha, kartoonada (10-100mm), caag (5-175mm), balaastig la xoojiyay (8-50mm).Goynta tooska ah ee birta.