Table 2. Soil types at monitored sites. (From Simon et al. 1999.)

Table 1. Ice impact processes investigated

Specific issues for survey sites

TR02-14
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38

ERDC/CRREL TR-02-14

Table 2. Soil types at monitored sites. (From

Simon et al. 1999.)

Riverbank toe

Site

Culbertson, RM 1621

Tveit-Johnson, RM 1624

Vournas, RM 1632

Mattelin, RM 1646

through mid-April 1999. One bathymetric survey was completed before the ice

cover formed over the river. Two were conducted when the river was ice cov-

ered. A final bathymetric survey was carried out shortly after ice departed the

river in early spring. Two additional site visits were carried out to observe chan-

nel conditions before and after the river became ice covered. The survey dates

were as follows:

Fall observation of channel conditions and site selection (October 1417,

Early winter, open water channel bathymetric survey (October 1622,

Early winter observation of ice formation at RM 1621, Culbertson

(December 2023, 1998);

Early winter covered-channel bathymetric survey (January 2628, 1999);

Mid-winter covered-channel bathymetric survey (February 2123, 1999);

Early spring open water bathymetric survey and observations (April 47,

The bathymetric surveys before freeze-up (cover formation) and shortly after

breakup (cover departure) revealed the extent to which ice affects channel

bathymetry. The two bathymetric surveys during winter provide insights as to

when and how the channel changes occurred. It was desirable, but not critical,

that the surveys be conducted when the river conveyed approximately the same

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