Using Mixed Methods to Understand Floods in Tropical Coastal Catchments

Authors: Shannon Jones*, University of Denver
Topics: Geomorphology, Latin America, Water Resources and Hydrology
Keywords: coastal flooding, mixed methods, Nicaragua, hydrology, Latin America
Session Type: Paper
Day: 4/8/2020
Start / End Time: 9:35 AM / 10:50 AM
Room: Plaza Court 6, Sheraton, Concourse Level
Presentation File: No File Uploaded

Coastal regions are becoming more vulnerable to flooding due to accelerated sea level rise and human modification of the landscape. Yet we are still uncertain about how rainfall and runoff processes impact coastal flooding, particularly in regions that lack access to available hydrometeorological data. This paper explores the use of mixed methods to understand extreme flooding in Ostional, Nicaragua. In 2017, flooding from Tropical Storm Nate devastated this region but there was no instrument record on the extent and timing of the flood in this catchment. Thus, we apply a mixed methods approach using quantitative paleohydrology methods and qualitative interview-based methods to reconstruct the timing and duration of rainfall and flooding from the storm. Results show that mixed methods can help calibrate a rainfall-runoff model. Findings suggest that mixed methods can be used in data-limited regions to better understand flooding impacts.

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