Expected effects of wildland fires on hydrologic values have been indexed by 11 hydrologic parameters of floods, sedimentation and water supply. Coefficients and watershed attributes from 10 multiple-regression models are used to distribute measured hydrologic parameters throughout each watershed. Other coefficients are used with present fire condition and fire frequency to estimate changes in the hydrologic parameters for four fire conditions: unburned, l percent average annual burn, after a 100 percent burn, and after a burn of 10,000 acres (3900 ha). Application is illustrated for north coastal, Sierra Nevada, and southern California watersheds.