Зависимость рельефа пойм сибирских рек от географических условий

Аннотация

Varieties of environment control features and deversity of channel deformations at Siberian rivers. Within the whole Siberia however several large regions can be outlined, each region having more or less homogenous conditions of channel development and character of the channel deformations. Floodplain relief is also uniform as it results from the channel development. At places where geological conditions limit the channel migration the floodplain is underdeveloped, its width is often less than the channel width at low water, the surface is flat and bare and their distribution is fragmentary. Such floodplains can be found at mountain rivers at the South and North-East of Siberia, as well as at the Middle Siberian plateau. At plains where river channels may migrate freely floodplains are usually broad, their character depending on physical-geographic conditions. At northern plains braided channels prevail which result from high effective discharge. At the South of Siberia floodplains are more steady, with pronounced topography (troughs, broad ridges etc), Permafrost and activity of the floating ice account for levelled relief and bogging of the floodplain surface. At some regions the floodplain topography is partly modeled by wind.