Dissolved load

Dissolved load is material, especially ions from chemical weathering, that are carried in solution by a stream. The dissolved load contributes to the total amount of material removed from a catchment. The amount of material carried as dissolved load is typically much smaller than the suspended load, though this is not always the case particularly when the available river flow is mostly harnessed for irrigation, industrial, etc. purposes. Dissolved load comprises a significant portion of the total material flux out of a landscape, and its composition is important in regulating the chemistry and biology of the stream water.

The process of carrying salts by water to the sea or a land locked lake from a river basin is called salt export. When adequate salt export is not taking place, the river basin area particularly in lower reaches gradually converts into saline soils and/or alkali soils. The salt export from the major rivers are

@ includes water transfer to other river basins

USGS CMG InfoBank: Suspended and Dissolved Loads

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