Note: After this file had been prepared for publication as a sample file but before submitting
it to the repositories, two additional field surveys had been made: September 6, 1967 and
June 27, 1968. These surveys consisted of resurveying the cross-sections listed in
tables 2-14; the new data are appended in tables 2A-14A. Also measured were
values of ground-surface erosion at stations listed in tables
15-16; the new data are
appended in tables 15A-16A.
Two mass-movement lines installed in 1963 were resurveyed;
all mass-movement data are listed in table 19. The mass-movement
lines consist of 10-inch spikes driven into the ground at various distances between two
end benchmarks. They are resurveyed periodically to determine their downslope position
relative to the rigid benchmarks. The individual pins are not permanent and
require periodic maintenance, however, the end benchmarks are permanent. Channel scour
and fill was measured at three locations; the data for all surveys are listed in
table 20. Because surveys are conducted annually, these
scour-fill data do not represent total scour and fill for each flow, but only the
annual net scour and fill. High-water marks on the crest-stage gage were observed; these
data are listed in table 21. Three soil samples were collected
in 1963; their size distributions are listed in table 22. A
vegetation description obtained in 1963 from a 15-foot quadrat extending west and north from
BM A is listed in table 23. Some of the headcuts occurring in the
discontinuous gully were periodically measured to determine their rate of upstream retreat.
These data are listed in table 24.
Additional references:
Emmett, W. W., and Hadley, R. F., 1968, The Vigil Network: Preservation and
access of data: U. S. Geol. Survey Circ 460-C, 21 p.
