Meeting Date: Monday, April 2, 2018
Guest Speaker: Philip Shaller, Ph.D., P.G., C.E.G.
Topic: The Wildfire-Flood Sequence in California: Past, Present and Future
The wildfire-flood sequence is an all-too-common phenomenon in southern California. The fires destroy vegetation and ground litter and modify soil conditions, accentuating flood hazards in subsequent winter rainfall events. The type and severity of flooding following a wildfire is contingent on many factors, including: the nature of the burned material, the burn severity, the timing and intensity of post-wildfire rainfall, the history of wildfire in affected watersheds, the size and topographic relief of the burned watersheds, the watershed geology, and the characteristics of the built environment. The nature of the first rainfall event or “first flush” is of particular importance to the post-wildfire flooding hazard. In this talk, these factors are discussed in relation to the recent Thomas Fire and Montecito flooding. These recent events are also placed in historical context with prior examples of the fire-flood sequence in southern California. To conclude the talk, future manifestations of the wildfire-flood sequence are contemplated based on projections of current trends and the state of knowledge of the field.
Dinner Menu: Mediterranean Buffet with Hawaiian Glazed Beef Satay Tenders, Souvlaki Grilled Chicken Breast, Grilled Vegetables, Citrus Rice, Classic Hummus, Greek Garden Salad, Pita Bread, Pita Chips, Churros, and Unlimited Coffee, Tea and Soda!