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Giant sequoia on the grounds of estate Voorstonden

This page contains specific information about giant sequoia (Sequoiadendron giganteum) '176', which can be found on the grounds of estate Voorstonden in Voorstonden (municipality of Brummen).

Girth growth rate

The girth was measured more than once:
YearGirth@0 mGirth@1.3 mGirth@1.5 mGirth@2 mMeasurementGirth growth rate
1972?6.35 m??Th.H. Klinkspoor-
2003?7.70 m7.30 m?Jeroen Philippona4 cm/year
2006?7.83 m7.48 m6.81 mJeroen Philippona4 cm/year
200812.20 m???Jeroen Philippona-
2011?8.20 m7.57 m6.94 mL. Goudzwaard & J. Philippona7 cm/year
201412.40 m8.30 m??Jeroen Philippona3 cm/year

The growth rate shown in the table shows the yearly average increase in girth since the last measurement. This value only gives an indication of the growth rate, since every measurement could be done at slightly different heights and during different periods of the year.

Height

The height was measured more than once:
YearHeightMeasurementMeasurement method
1972~33.00 m Th.H. KlinkspoorMeasurement method unknown
2003~30.00 mJeroen PhilipponaMeasurement method unknown
2011-11-0733.00 mL. Goudzwaard & J. PhilipponaLaser with Sine method (e.g. Nikon Forestry 550 laser rangefinder)
2014-04-1333.00 mJeroen PhilipponaLaser with Sine method (e.g. Nikon Forestry 550 laser rangefinder)

Each measurement can be done with varying accuracy.This tree was planted in 1876, which makes it exactly 138 years old (Jeroen Philippona, Nov 19, 2011).

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Photos

The photos are provided by Jeroen Philippona, Tim B, Th.H. Klinkspoor, and Larsvanderwal.

Estate Voorstonden, picture by Tim B, 2007-03-11

Estate Voorstonden, picture by Tim B, 2007-03-11

Estate Voorstonden, picture by Tim B, 2007-03-11

Estate Voorstonden, picture by Tim B, 2007-03-11

Estate Voorstonden, picture by Tim B, 2007-03-11

Show all images (13 in total)...

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