. . "(ab) Physical alteration includes, but is not limited to, the following activities: vegetation removal, demolition, stockpiling materials, grading and other forms of earthwork, dumping, filling or depositing, discharges to air or water, excavation or trenching, application of pesticides, herbicides, or other chemicals, application of sewage sludge, dredging, flooding, draining or dewatering, pavin" . . . . .