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Specific Features and Conditions of the Expedition
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6. SPECIFIC FEATURES AND CONDITIONS OF THE EXPEDITION
Specific features of the expedition were the following:
- the research has to be coordinated (as to time and space, as well as to the basic methods applied) with analogous works conducted in Ukraine;
- water quality and quantity have to be registered simultaneously at the studied river posts;
- assessment of hydro-environmental conditions of water and bottom sediments has to be complex according to hydro-chemical, hydro-biological and radiation parameters;
- field studies have to be specially directed to further assessment of trans-boundary pollution;
- involvement of highly skilled specialists from institutions of various ministries and departments in field studies and laboratory research.
The weather conditions were favorable for the expedition. It was rather warm and sunny for that season. There was practically no raining. So, we can consider that, for the whole period of expedition, the hydrological, hydro-thermal and hydro-biological regimes of Dnipro, Prypyat and their tributaries were stable. River flow was mainly formed by water of underground sources; there was no pollution washed from agricultural territories; there were no significant changes in speeds of water mass movement. So, the data of expeditionary research are sufficiently representative not only for approximate estimation of the summary impact of concentrated pollution sources, but for comparative pollution assessments along the whole river and at trans-boundary posts.
