The state of Bihar is noted for homogeneity of land surface and agriculture resource based population and much less uneven distribution of population is supposed to be found in this state. But not all areas of the state have uniformity in the distribution of population and its associated characteristics because of some physical conditions like the high flood prone areas, chaurs, marshy land, diara land smaller hilly areas and some socio economic conditions like the development of roads, rail route, centres of religious importance etc. As such there are areas having comparatively more concentration of people than the areas having relatively less favourable conditions. Rivers of North Bihar which cause less damaging flood and distribute fertile soil in the area have dense population like Kamla, Sugrawe, Little Baghmati, Ghaghra etc.