Pájaro River Watershed Flood Protection Plan - The Pajaro River ...
Pájaro River Watershed Flood Protection Plan - The Pajaro River ... Pájaro River Watershed Flood Protection Plan - The Pajaro River ...
Historical Change in San Benito River east of Hwy 101 Plate 39: Top photo, December 2000; bottom photo, June 1939 See Appendix Plate XX for topographic maps of this site. River flow is from right to left. Overbank floodplain areas are clearly visible in 1939, as is a wide aggrading sand-filled channel. Mining beginning in the 1940’s has now lowered the channel 15-20 feet or more to intersect groundwater. An incised channel can be seen in the vegetated mined-out area today. Some areas of original flood plain in 1939 are now occupied by industrial development along Highway 101 and along San Juan Highway north of Anzar High School.
Historical Change in San Benito River Just above Hwy 101 Portions of San Juan Bautista and Chittenden 1:24,000 topographic quadrangles showing 1952 topography with mining that was interpreted as active in 1997-98. The purple overprint convention differs between the two matched maps, but streambed alteration is indicated over most of the original channel area. Topography based on the December 2000 photobase. Levees isolate active channel from both historic and newly excavated floodway. See text for details.
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Historical Change in San Benito <strong>River</strong> east of Hwy 101<br />
Plate 39: Top photo, December 2000; bottom photo, June 1939<br />
See Appendix Plate XX for topographic maps of this site. <strong>River</strong> flow is from right to left.<br />
Overbank floodplain areas are clearly visible in 1939, as is a wide aggrading sand-filled channel. Mining<br />
beginning in the 1940’s has now lowered the channel 15-20 feet or more to intersect groundwater. An<br />
incised channel can be seen in the vegetated mined-out area today. Some areas of original flood plain<br />
in 1939 are now occupied by industrial development along Highway 101 and along San Juan Highway<br />
north of Anzar High School.
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