Spatial Analysis of Drought and its Impacts in the Chickasaw Nation, Oklahoma pdf

Authors: Melissa Wagner*, University of Oklahoma
Topics: Climatology and Meteorology, Hazards, Risks, and Disasters, Physical Geography
Keywords: Drought, Spatial Analysis, Tribal Nation, R, Hydrology
Session Type: Paper
Day: 4/10/2018
Start / End Time: 2:40 PM / 4:20 PM
Room: Napoleon B1, Sheraton 3rd Floor
Presentation File: No File Uploaded

Drought is one of the most devastating natural disasters we experience in the United States, and these events can cost state and local governments billions of dollars each year. Unfortunately, drought does not affect all communities equally, and it is difficult to analyze the impacts of drought on a local scale. This study provides a spatial analysis of the hydrologic impacts within the tribal boundaries of the Chickasaw Nation in south central Oklahoma. To provide a relatively complete spatial representation of the drought, the Standardized Precipitation Index (SPI) and the Standardized Precipitation Evapotranspiration Index (SPEI) were calculated using daily precipitation, and average daily temperature data from the nineteen Oklahoma Mesonet stations within the tribal nation. This data was then interpolated over one-, three-, and twelve-month time scales across the region. These results were compared to river discharge, lake levels, and ground water time series at different locations across the study area to give a better representation of the hydrologic impacts during periods of drought. In addition, this project investigated any discrepancies between drought indices and the hydrologic variables. Finally, we assessed if these are simply spatial differences or are there seasonal elements to these variances. This research will be used to provide a crucial awareness of the unique impacts of drought, and contribute to the Chickasaw Nation’s Drought Contingency Plan to assist in the preparations for this natural hazard in the future.

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