Methodical Approaches to Determination of the Runoff Acceptable Irretrievable Withdrawal from Underexplored and Unexplored Rivers and Small Rivers

If the permissible impact of economic and other activities on a water body is exceeded, an irreversible degradation of the ecosystem may occur. Irretrievable water withdrawal is deemed significant human impact on water bodies. The establishment of a critical water limit for the ecosystem’s functioning and organisms’ reproduction is based on the water withdrawal limits’ assessment. The article suggests methodological approaches to defining acceptable irreversible withdrawal of surface water runoff for underexplored and unexplored rivers. It also includes a review of special features of water withdrawal from small rivers.