Details

Autor(en) / Beteiligte

• Routson, R C
• Johnson, V G

Titel

Recharge estimates for the Hanford Site 200 Areas Plateau

Ist Teil von

• Northwest science, 1990-05, Vol.64 (3), p.150-158

Ort / Verlag

United States

Erscheinungsjahr

1990

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• The magnitude of recharge from natural precipitation was assessed on the Hanford Site 200 Areas Plateau. Two sources of data were used in the evaluation: (1) moisture accumulation in an 18-m-deep 200 East Area, closed-bottom lysimeter for 13 yr, and (2) distribution of super(137)Cs in a solid-waste burial ground in which contaminated soil had been buried for 10 yr. A borehold was core drilled in 1985 to the bottom of the 200 East Area closed-bottom lysimeter and the moisture content was determined gravimetrically. The 1985 moisture content of the lysimeter was compared with its initial moisture content to estimate the recharge. There was an apparent net loss of moisture during the 13-yr experiment. There appears to be very little potential for downward movement of mixed waste contaminants in the upper vadose zone beneath much of the 200 Areas Plateau under natural or minimally disturbed conditions.