Ice parameter monitoring and importance

Figure 2. Ice data instrumentation survey

Table 2. Ice parameters currently monitored, by Divisions

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Table 1. Districts with potentially ice-affected projects and number of

survey responses received.

Total number of

reservoirs, locks, Total number

and dams in ice

Lower Mississippi Valley Division (LMV)

Missouri River Division (MRD)

North Atlantic Division (NAD)

North Central Division (NCD)

New England Division

North Pacific Division (NPD)

Ohio River Division (ORD)

South Pacific Division (SPD)

Southwestern Division (SWD)

toring, as each of these Districts has a number of

caution is required when interpreting Table 3,

navigation projects.

however, since the perceived importance of dif-

ferent parameters is constantly changing as knowl-

edge in the field of ice engineering expands. For

Ice parameter monitoring and importance

The first part of the survey (Fig. 2) was divided

example, ice concentration and freezeup stage are

into five questions (1a1e), with the first three deal-

not considered by the survey respondents to be

ing with ice-related data currently being collected

important parameters to monitor (Fig. 3), but fu-

or desired to be collected and the relative impor-

ture monitoring is of interest, as evidenced by the

tance of measuring these parameters. Twelve ice-

ratio of respondents who want to measure these

related parameters were presented for evaluation

parameters to those currently measuring them

(question 1c). Tables 2 and 3 summarize the re-

(Fig. 4). Both of these parameters are important in

sponses received to these three questions, and Fig-

ice jam formation: ice concentration directly im-

ures 3 and 4 present the results graphically. Some

pacts both freezeup and breakup jam formation

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