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Extreme Precipitation Variability and Soil Texture Controls on Water-Table Response


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Created: Dec 23, 2024 at 8:45 p.m.
Last updated: Dec 24, 2024 at 12:44 a.m.
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Abstract

Observed increases in the intensity and duration of extreme precipitation events (EPEs) worldwide are projected to continue with climate change. EPEs can affect water-table dynamics, but the extent of EPE influence and soil texture controls remain poorly understood. We led a one-dimensional modeling effort to examine how EPEs influence water-table dynamics, specifically water-table response time, displacement, recession time, and total recharge. We conducted simulations with EPE amounts of 0.20 m, 0.40 m, and 0.60 m, applied across three durations: 1-day, 7-day, and 20-day, and also used twelve soil textures to examine varying soil texture influence. Results showed water-table response in coarser-grained soils occurs in a manner of days compared to the >200 day response time of finer-grained soils. With increasing EPE amount, water-table response times shortened, varying from ~3 days (sand) to ~239 days (clay). Water-table displacement, calculated as the difference (meters) between the water-table level post-EPE versus steady state, ranged from 0.30 - 1.64 m, and is positively correlated with increasing EPE amount. Despite EPE amount or duration, water-table recession ranged from 1.2 - 3.0 years for all soils. Total recharge is calculated by considering the available porosity and water-table displacement from EPEs, with totals ranging from 17% (clay) to 97% (sand). Recharge appears to be primarily a function of EPE amount and soil properties, with the overall average recharge ~63% of the total EPE amount. Broadly, this modeling effort provides a clearer view of the influence of soil texture on groundwater response to EPEs.

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Content

README.txt

README 

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Extreme Precipitation Variability and Soil Texture Controls on Water-Table Response
Claudia R. Corona^1, Shemin Ge^1, Suzanne P. Anderson^1,2, Jesse E. Dickinson^3

1-University of Colorado, Boulder, Department of Geological Sciences, Boulder, CO USA
2-Institute of Arctic and Alpine Research, Boulder, CO, USA
3-U.S. Geological Survey, Tucson, AZ, USA

Correspondence to: Dr. Claudia R. Corona (claudia.corona@colorado.edu)

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This repository contains the following: 1) HYDRUS-1D (free software download at: https://www.pc-progress.com/en/Default.aspx?H1d-downloads) input and output data used to simulate subsurface conditions response to EPEs. The time variable BC table is explained in the excel file "Precip_rates_EPE". And 2) also included is the plot data for the water table fluctuation data used for Figures 3, 4, 5, and the recharge calculations used for Figure 6:

1) HYDRUS_1D_input_output_data_raw
2) Plot_data_Figures_3_4_5_6

*Please note: Figures 1 and 2 are illustrations and there is no plot data for them.

The HYDRUS-1D software may be freely downloaded at: https://www.pc-progress.com/en/Default.aspx?H1d-downloads.

If you use any of this data, please cite this HydroShare repository.

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For any questions or comments, please contact Dr. Claudia Corona at claudia.corona@colorado.edu

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Credits

Funding Agencies

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
National Science Foundation, Division of Earth Sciences Dynamic Response of Watershed Subsurface System to Extreme Rainfall Events 1834290

How to Cite

Corona, C. R., S. Ge, S. P. Anderson, J. E. Dickinson (2024). Extreme Precipitation Variability and Soil Texture Controls on Water-Table Response, HydroShare, http://www.hydroshare.org/resource/1ddf63acf38047059b8085bcbdf4e4f7

This resource is shared under the Creative Commons Attribution CC BY.

http://creativecommons.org/licenses/by/4.0/
CC-BY

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