Irrigational water derivation and disposal as a factor of anthropogenic load on the coastal environment  <B>Irrigational water derivation and disposal as a factor of anthropogenic load on the coastal environment</B><P>M.V. Sanin and A.P. Frolov</B><P> Abstract<P> The irrigational water derivation and disposal pollute natural water resources and change the salinity dynamics in coastal zones. These are factors of anthropogenic load on coastal environment. Irrigation leads to the formation of a new type of water bodies nonterminal (still) storage reservoirs accumulators of collectordrainage waters. The paper develops the modeling methods of salts storage in the reservoirs, depending on variability of their hydrological and hydrochemical regimes and rate of salinity. The theoretical, experimental and natural study of these problems is illustrated by the example of lake Manych Gydilo (the South Russia), the hydrological regime and ecological situation of which is under the impact of water derivation from irrigation.<P>