New approach to identify trend pattern of streamflows

Zhenxing Zhang, Andrew D. Dehoff, Robert D. Pody

Research output: Contribution to journalArticle


Streamflow trend analyses have so far mainly focused on testing if trends for a specified period are significant. However, the traditional trend tests cannot characterize trend patterns, i.e., if the trend is gradual or abrupt. This study contributes a novel approach to identify the trend pattern of streamflows. This study proposes the use of repeated monotonic trend tests with varying beginning and ending times. The results of the repeated trend tests are plotted along the beginning and ending times. The sensitivity of trends with respect to the period of time is then employed to characterize the trend pattern. Application of the new approach to watersheds within the Susquehanna River Basin demonstrates that the new approach is capable of characterizing trend patterns. A comparison with the results of single monotonic trend tests shows that it is also useful for the exploration of all available data in contrast to a single monotonic trend test that only shows trends for a specified time period.

Original languageEnglish (US)
Article number002003QHE
Pages (from-to)244-248
Number of pages5
JournalJournal of Hydrologic Engineering
Issue number3
StatePublished - Mar 1 2010
Externally publishedYes


  • Pattern
  • Streamflows
  • Trend test

ASJC Scopus subject areas

  • Environmental Chemistry
  • Civil and Structural Engineering
  • Water Science and Technology
  • Environmental Science(all)

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