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7/14/2009 5:02:37 PM
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5/20/2009 3:21:58 PM
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UCREFRP
UCREFRP Catalog Number
9617
Author
Scott, M. L., M. A. Wondzell and G. T. Auble
Title
Hydrograph Characteristics Relevant to the Establishment and Growth of Western Riparian Vegetation
USFW Year
1993
USFW - Doc Type
Hydrology Days Publications
Copyright Material
NO
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<br />mBan daily flows for a typical snowmelt-dominated <br />system in arid and semi-ar1d western North America. <br /> <br />For the purposes of this paper, the hydrograph <br />(Figure 1) is broken into five segments: 1) the <br />Risinq Limb: II) the Crest or Peak: III) the Receding <br />Limb: IV) a period of Summer Flow which is often <br />punctuated by intense, but brief, high flows: and V) <br />a period of winter Flow often defined as base flow or <br />low flow. This discussion focuses on all aspects of <br />a typical stream hydrograph and does not attempt to <br />address the obvious influence of stream type, <br />geomorphic setting, or system-specific responses on <br />riparian vegetation. <br /> <br />1 <br /> <br /> <br />IV <br /> <br />V <br /> <br />t1l <br />e" <br />~ <br />U <br />tIl <br />H <br />o <br /> <br />Mar Apr May Jun Jul Aug Sep Oct Ncv Dec Jan Feb <br /> <br />TIME <br /> <br />Figure 1. Annual hydrograph of a typical <br />snowmelt-dominated system. <br /> <br />Rising Limb (1) <br /> <br />The rising limb of a hydrograph is predominantly <br />influenced by the character of the storm or snowmelt <br />producing the rise (Linsley et al. 1986). In a river <br />system governed by snowmelt, this period of <br />increasing streamflow usually begins in m1d- to late <br />March and continues into May~ This segment of the <br />hydrograph plays an insignificant role in the <br />successful regeneration of cottonwood and willow <br />species. <br /> <br />241 <br />
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