Progress Report Number 10 of Silt Load of Texas Streams: 1947-1948 Page: 3
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feet, while for the year 1947-1948, it was 1,950,620 acre feet, which is
32%. of the average flow. The average load for the same period is 24,898
acre feet, while for the year it was 2,591 acre feet, which is 1010 of the
average load. The total load for a 24.3-year period is 889,824,770 tons
or 582,870 acre feet of silt. This large quantity of silt is sufficient
to have jeopardized the economic life of a water storage reservoir similar
to Lake P>ssum Kingdom located on the same watershed and which has a capa-
city of 750,000 acre feet of water. The data obtained at the Richmond
Station are probably the longest continuous daily silt records in existence
(2501 years to August, 1949).
Easterly Station, Navasota River
The average discharge af the Navasota River (a tributary of the Brazos
River) at the Easterly Station for a 5.7-year period is 433,650 acre feet,
while for the year 1947-1948, it was 99,160 acre feet, which is 23j. of the
average flow. The average silt load for the same period is 275 acre feet,
while for 1947-1948, it was 53 acre feet, which is 191. of the average load.
The total load for a 607-year period is 2,485,660 tons or 1,634 acre feet
of silt0
San Saba Station, Colorado River
The average discharge of the Colorado River at the San Saba Station
(located a few miles above the upper portion of Lake Buchanan) for a 17-year
period is 1,245,570 acre feet, while for the year 1947-1948, it was 604,200
acre feet, which is 48%. of the average flow. The average silt load for the
same period is 3,148 acre feet, while for the year 1947-1948, it was 2,222
acre feet, which is 71%. of the average load0 The total load for an 18-year
period is 85,258,480 tons or 55,919 acre feet of silt. The silt records
obtained at this station are also among the longest daily continuous records
(18.8 years to August, 1949).
Johnson City Station, Pedernales River
The average discharge of the Pedernales River (a tributary of the
Colorado River) at the Johnson City Station for a 502-year period is
131,570 acre feet, while for the year 1947-1948, it was 31,690 acre feet,
which is 241. of the average flow. The average silt load for the same period
is 180 acre feet, while for the year 1947-1948, it was 27 acre feet, which
is 15%. of the average load0 The total load for a 6.2-year period is 1,456,500
tons or 957 acre feet of silt.
Llano Station, Llano River
The average discharge of the Llano River (a tributary of the Colorado
River and joining it between Lake Buchanan and Lake Travis) at the Llano
Station for a 5.2-year period is 181,690 acre feet, while for the year
1947-1948, it was 327,420 acre feet, which is 180. of the average flow.
This is one of the few streams that had any excessive flood waters during
the year. The upper watersheds of this stream are located in areas where
excessive and very high rainfall occurred during the year, some of which
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Bloodgood, Dean W. Progress Report Number 10 of Silt Load of Texas Streams: 1947-1948, report, August 1949; Austin, Texas. (https://texashistory.unt.edu/ark:/67531/metapth1623153/m1/14/?rotate=270: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.