Recent hydroclimatic extremes in the Cypress Creek watershed, Texas, USA.
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| Title: | Recent hydroclimatic extremes in the Cypress Creek watershed, Texas, USA. |
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| Authors: | Abeysingha, N S1,2 (AUTHOR), Ray, Ram L1 (AUTHOR) raray@pvamu.edu |
| Source: | Journal of Earth System Science. Jun2026, Vol. 135 Issue 2, p1-22. 22p. |
| Subject Terms: | *Rainfall, *Streamflow, *Watersheds, *Precipitation anomalies, *Climate extremes, *Temperature |
| Geographic Terms: | Texas |
| Abstract: | Analysis of hydroclimatic extremes in small watersheds is vital for managing watershed health and sustainability. This study assessed statistical extreme variables of rainfall, streamflow, and temperature in the Cypress Creek watershed in Texas, USA, to identify recent hydroclimatic status and examine their associations. The study utilized 5th and 95th percentiles, five-day maximum values, Standardized Precipitation Index (SPI), and Standardized Streamflow Index (SDI) as primary indices. The analysis revealed fluctuations in extreme rainfall and streamflow over four decades, with non-significant upward trends, evidenced by increases in 95th percentiles and 5-day maxima of both variables, increased frequency of daily extreme rainfall events >50.4 mm, and high coefficient of variation values. Frequency analysis of SPI and SDI indicated that moderate dry conditions typically prevail during winter, while moderate wet conditions are more common in summer. Streamflow fluctuations are primarily influenced by rainfall variations, as indicated by a strong correlation (ρ > 0.8). Temperature extremes indices showed significant warming trends across the watershed. Findings reveal considerable hydroclimatic variability that primarily triggers flooding but also contributes to drought conditions, providing valuable insights for developing targeted climate adaptation strategies. Research highlights: Conducted an analysis of rainfall, streamflow and temperature extremes in Cypress Creek watershed. Demonstrated upward tendency of extreme rainfall, streamflow and temperature. Identified a significant decline in low rainfall and an increase in low streamflow bins. Characterized by moderately dry winters and moderately wet summers. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Abstract: | Analysis of hydroclimatic extremes in small watersheds is vital for managing watershed health and sustainability. This study assessed statistical extreme variables of rainfall, streamflow, and temperature in the Cypress Creek watershed in Texas, USA, to identify recent hydroclimatic status and examine their associations. The study utilized 5th and 95th percentiles, five-day maximum values, Standardized Precipitation Index (SPI), and Standardized Streamflow Index (SDI) as primary indices. The analysis revealed fluctuations in extreme rainfall and streamflow over four decades, with non-significant upward trends, evidenced by increases in 95th percentiles and 5-day maxima of both variables, increased frequency of daily extreme rainfall events >50.4 mm, and high coefficient of variation values. Frequency analysis of SPI and SDI indicated that moderate dry conditions typically prevail during winter, while moderate wet conditions are more common in summer. Streamflow fluctuations are primarily influenced by rainfall variations, as indicated by a strong correlation (ρ > 0.8). Temperature extremes indices showed significant warming trends across the watershed. Findings reveal considerable hydroclimatic variability that primarily triggers flooding but also contributes to drought conditions, providing valuable insights for developing targeted climate adaptation strategies. Research highlights: Conducted an analysis of rainfall, streamflow and temperature extremes in Cypress Creek watershed. Demonstrated upward tendency of extreme rainfall, streamflow and temperature. Identified a significant decline in low rainfall and an increase in low streamflow bins. Characterized by moderately dry winters and moderately wet summers. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 02534126 |
| DOI: | 10.1007/s12040-026-02792-6 |
