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Platte River Ecology Study

Appendices

Appendix Q. Definitions of the 12 environmental parameters used to characterize the 71 permanent quadrats in riparian vegetation studies.

Parameters                                     Definition

SOIL MOISTURE

  Average soil moisture       Average weekly % soil moisture between 10 June
                              and 27 August.

  Critical soil moisture      Average weekly % soil moisture between 16 July
                              and 27 August.

  Minimum soil moisture       Minimum weekly % soil moisture between 10 June
                              and 27 August.

SOIL TEXTURE

  Coarse gravel               % soil fraction > 4760 microns.

  Gravel                      % soil fraction 2000-4760 microns.

  Sand                        % soil fraction 250-2000 microns.

  Very fine sand              % soil fraction 105-250 microns.

  Silt                        % soil fraction < 105 microns.
	
WATER REGIME
	
  Exposure (days)             Number of days (out of 77) of no flooding  
                              between 16 July and 30 September.

  Average depth (cm)          Average depth (cm) during flooding between 
                              16 July and 30 September.

  Total maximum (cm)          Maximum water depth between 10 June and 30 
                              September.

  Critical maximum (cm)       Maximum water depth between 16 July and 30 
                              September.

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