[Methodological Approaches to the Organization of Counter Measures Taking into Account Landscape Features of Radioactively Contaminated Territories].

Methodological approaches to the organization of counter measures are considered taking into account the landscape features of the radioactively contaminated territories. The current status and new requirements to the organization of counter measures in the contaminated agricultural areas are analyzed. The basic principles, objectives and problems of the formation of counter measures with regard to the landscape characteristics of the territory are presented; also substantiated are the organization and optimization of the counter measures in radioactively contaminated agricultural landscapes.

[Horizontal and vertical migration of 137Cs on slopes landscapes].

The paper considers the results of field researches on studying the basic laws of 137Cs migration on slopes landscapes. The characteristic of horizontal and of vertical 137Cs migration is given depending on an element of a relief, geomorphological conditions and properties of soil. Critical kinds of slopes with the most intensive streams of radionuclides migration and the maximal accumulation of 137Cs in plants have been determined.

[Assessment of factors determining the dynamics of pollution by Cs-137 of agricultural production after the Chernobyl AES accident]. / Otsenka faktorov, opredeliaiushchikh dinamiku zagriazneniia 137Cs sel'skokhoziaistvennoi produktsii posle avarii na Chernobyl'skoi AES.

Analysis of the dynamics of 137Cs content in the main kinds of plant and animal products obtained on the basis of a separate farm located at 40-50 km to the north from Chernobyl NPP has shown that in 1987-1991 the decrease of 137Cs transfer from soil to agricultural crops was on the average 2--4-fold, and for milk--6--7-fold during the pasture period and 10-fold--during stabling one. The half-life periods of decrease of 137Cs constant in the main kinds of plant production vary from 2.1 to 5.9 years; for milk this parameter equals to 1.4 years in the pasture period, and in the stabling one--2.8 years. The main contribution (67-80%) to the decrease of 137Cs transfer to plant products is made by biogeochemical processes causing decrease of mobility of 137Cs in soil; as for agrochemical countermeasures, these contribute 20--33%. Decrease of contamination of milk, on the contrary, is mainly due to realization of countermeasures--contribution of the latter reaches 60%.

[Radiation-hygienic evaluation of vegetables and potatoes grown after soil irrigation with water containing artificial radionuclides]. / Radiatsionno-gigienicheskaia otsenka ovoshchnoi produktsii i kartofelia, vozdelyvaemykh pri oroshenii vodami, soderzhashchimi iskusstvennye radionuklidy.

Radiation and hygienic appraisal of vegetables cultivated under various kinds of irrigation is presented. Critical radionuclides are determined along with major vegetable products owing to which the great amount of radionuclides is absorbed. Contribution of vegetables and potato cultivated under irrigation into the total body intake of radionuclides by local residents has been evaluated.