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Streamflow composition in U.S. rivers is shifting toward recent precipitation
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Created: May 11, 2026 at 5:39 p.m. (UTC)
Last updated: Jun 11, 2026 at 5:25 p.m. (UTC)
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Abstract

This data product is related to a journal article by Chuqiang Chen and Admin Husic entitled "Streamflow composition in U.S. rivers is shifting toward recent precipitation".

Abstract:
The fraction of streamflow derived from recent precipitation—'event water’—profoundly impacts water quality and flood risk. We show that over the past four decades, this fraction has significantly increased in 27% of 754 U.S. catchments. We achieved the first continental-scale reconstruction by applying a deep learning model to a novel tracer dataset spanning nearly 24,000 storm events. Using explainability methods, we attribute intensifying precipitation, urbanization, and deforestation as the primary drivers. Event water fraction increases nearly two times more frequently than streamflow increases, indicating that for many rivers where streamflow trends are stationary, the composition of streamflow is changing. These results reveal a widespread shift towards the rapid conversion of precipitation to streamflow by watersheds, signaling a need to adapt water management strategies for a future of accelerating climate and land-use pressures.

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Content

README.txt 

# Decadal reconstruction of event water fraction across CONUS

## This repository provides code and data for the reconstruction of event water fraction across 754 sites from 1986 to 2024.

### /data
Annual Flow and Drivers.xlsx: annual event water, pre-event water, streamflow, event water fraction, and drivers.

Credits

Funding Agencies

This resource was created using funding from the following sources:
Agency Name Award Title Award Number
U.S. National Science Foundation CAREER: Dynamic connectivity: a research and educational frontier for sustainable environmental management under climate and land use uncertainty 2438017

How to Cite

Husic, A., C. Chen (2026). Streamflow composition in U.S. rivers is shifting toward recent precipitation, HydroShare, http://www.hydroshare.org/resource/8c5e6c59f1ac411caf809a735cd6f6b1

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

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

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