Development of hydrological indices to aid cumulative impact analysis of riverine wetlands

摘要: A hydrological analysis of historic stream data collected with the gauge on Cache River at Patterson, Arkansas, USA, is presented as basis for cumulative impact riverine wetlands. Subtle, long-term changes in hydroperiod, which could collectively have major effects wetland function, are quantified. Harmonic analysis, time-scale and conventional methods data, decade intervals, employed, showing a steady decline magnitude predictability baseflow during low flow periods, beginning 1920s becoming increasingly more pronounced into 1980s. Complementary information suggests that hydroperiod alterations associated increased groundwater pumping to support rice agriculture basin. These simple enough routine application (when adequate available) but sufficiently sophisticated identify subtle effects. The identified using these may potential explain biotic communities or wetlands structure part comprehensive studies. © 1997 John Wiley & Sons, Ltd.