Analysis of Streamflow Trend in the Susquehanna River Basin, USA

  • Deepesh Machiwal
  • Madan Kumar Jha


Streamflow statistics are extensively employed for the management and development of water resources. The magnitude and frequency of streamflows in the Susquehanna River Basin (SRB) are often used by the Susquehanna River Basin Commission (SRBC) and other agencies for the purposes of water resources planning and management (SRBC, 2006). For example, a wide range of streamflow statistics are used for consumptive water use mitigation, reservoir operation, and minimum release management. Water resources engineers and managers often implicitly assume that streamflow series are stationary over time when using streamflow data and statistics (SRBC, 2006; Zhang and Kroll, 2007a,b; Milly et al., 2008). This assumption may not be valid if the watershed under consideration is sensitive to human disturbance and/or climate change. More generally, climate variability, and change in population, land use and water use are implicated in the non- stationarity of streamflow series (Koutsoyiannis et al., 2009; Lins and Stakhiv, 1998; Milly et al., 2008). In a review of its consumptive use mitigation strategy, the SRBC examined the frequency and duration of consumptive use compensation releases from reservoirs located in the upper reaches of the SRB. It was evident that the number and frequency of 7-day-10-year low flow (Q710) events had dropped substantially since around 1970. This suggests that the assumption of stationarity in the basin might be invalid. Therefore, an investigation of the assumption of streamflow stationarity in the SRB was of interest.


Trend Pattern Blue Ridge Hydrologic Time Series Colorado River Basin Streamflow Series 
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Copyright information

© Capital Publishing Company 2012

Authors and Affiliations

  • Deepesh Machiwal
    • 1
  • Madan Kumar Jha
    • 2
  1. 1.Central Arid Zone Research Institute Regional Research StationGujaratIndia
  2. 2.Indian Institute of Technology KharagpurWest BengalIndia

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