Discharge of organic and biogenic substances from small rivers of Kaliningrad region in the Baltic Sea

Abstract

The Pregolja and the Neman (its basin is situated within four states) rivers are the largest
sources of load on the Vistula (Kaliningrad) and the Curonian lagoons from Kaliningrad
Region, Complex ecological researches of the small rivers were accomplished in 1993-1999,
besides the hydrological data bank was replenished due to researches in June 200 I-July 2006,
Analysis of monthly average has shown that the load from each studied river (with rare
exception only) is directly proportional to size of the basin and to the total average runoff
The condition of these rivers reflects the ecological situation in the significant river water
regime phase area, Hydrochemical parameters reflect a present picture of pollution and
saprobiological parameters characterize a situation in the reservoir for some period of time
interval before researches, The load from the river is connected with the phases of the riverflow regimes substantially and its different parameters can increase or decrease in accordance
with the changes of underground and superficial nutrition ratio and with the seasonal
prevalence of the hydrobionts' vital functions.
Thus, one of the criteria for estimating the ecosystem pollution may be the limit; load from
the river is higher which ceases to be than the exceeding, this means that the load from river is
not proportional to the area of its reservoir, i.e. the river practically looses ability to
autopurification.
Specific load, i.e. monthly average load from the area unit of the river basin was calculated
and analyzed, The results have estimated the contribution of each river eutrophication of the
receiving water, In particular, load from the Mamonovka and the Prokhladnaya river (their
basins are partly located in the territory of Poland) concerning the majority of river
parameters was in several times (sometimes in multiple and more) higher than the other
rivers. It was revealed, that the load from the river was substantially connected with and
different parameters can increase or decrease pursuant to changes in ratio between
underground and surface recharge and seasonality of.