FIGURE 6–3 Year-to-year variation of the longest period that wetland hydrological criteria satisfied. Results obtained from long-term simulation modeling using DRAINMOD. NOTE: There are several 5-year periods where criteria are not satisfied 3 out of 5 years. SOURCE: Skaggs (1978). Reprinted with permission; copyright 1978, Water Resources Research Institute of the University of North Carolina, Raleigh.

Breaux and Serefiddin (1999) examined 110 compensatory wetland mitigation projects in California (permitted from 1988 to 1995) and determined that the most commonly measured parameter was vegetation (type or cover) (Table 6–4). Two of the most commonly assumed wetland val-

TABLE 6–4 Parameters Measured in 110 Compensatory Wetland Mitigation Projects in California from 1988 to 1995

Parameter

% of Sites Measured

Vegetation

72

Hydrology

22

Wildlife

38

Water quality

7

Soils

3

Invertebrates

3

Flood storage

Not mentioned

SOURCE: Adapted from Breaux and Serefiddin (1999).



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