Pájaro River Watershed Flood Protection Plan - The Pajaro River ...

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Figure 2 -- 1939 Photo of Lower Pájaro Valley. Watsonville in lower right. The landslides are readily seen at the position of Highway 1 today, near the center left of the photo. Also visible are the flow lines from past floods that impinge against the left (south) side of the valley. DRAFT 7/22/03 10 Pájaro Watershed Flood Management
Map A 1875 based on 1854 land survey It may be that in the Ranchero and early statehood period, the lower Pájaro River was channelized to try to restrict regular overbank flow in distributary channels so that land use could be made more efficient. Looking at the 1939 and earlier aerial photos, we still see clear evidence of those distributaries (cf Fig. 3). The earliest detailed topographic map (Capitola Quadrangle, 1912) shows “Watsonville Creek” that flows from the left bank of the Pájaro River across that river from Salsipuedes Creek in Watsonville, directly south near Salinas Road and into Elkhorn Slough. That channel is still there and still carries rainfall and flood overflow runoff to Moss Landing. Runoff from a major part of the townsite of Pájaro does not enter the Pájaro River today but flows via “Watsonville Creek” to Elkhorn Slough. The confusing topography was commented on by William Brewer in his diary in 1864 that noted that the flat valley looked like "an old lake filled in as is shown by the terraces around its sides." (Farquhar, 1930). Olaf Jenkins identifies a “Lake Pájaro” and “Lake Aromitas” in the old lower Pájaro Valley (1973). DRAFT 7/22/03 11 Pájaro Watershed Flood Management
Page 1 and 2: California State University Robert
Page 3 and 4: Table of Contents Executive Summary
Page 5 and 6: Pájaro River Watershed Flood Manag
Page 7 and 8: that today bears the name Pájaro.
Page 9: Map B. 1908 Parcel Map of a portion
Page 13 and 14: Upper Watershed, San Benito and San
Page 15 and 16: Himalaya and Alaska are there possi
Page 17 and 18: DRAFT 7/22/03 17 Pájaro Watershed
Page 19 and 20: The current project attempts to rec
Page 23 and 24: where: g adj is the adjusted skew g
Page 25 and 26: 70000 Hollister upper confidence in
Page 27 and 28: value for the maximum possible 100-
Page 29 and 30: Regional Analysis The trend in perc
Page 31 and 32: Interestingly, the maximum consecut
Page 35 and 36: We also find that on the order of 6
Page 37 and 38: Figure11 Cartoon showing how incisi
Page 39 and 40: Although Hospital Road shows some a
Page 41 and 42: clearly attenuate (reduce) flood pe
Page 43 and 44: average 8-foot depth of water that
Page 45 and 46: culverts and fill. Other parts of t
Page 47 and 48: Our modeling of enhanced flood stor
Page 49 and 50: APPENDICES & Figures APPENDIX 1: No
Page 51 and 52: APPENDIX 5 Example of Historical Ch
Page 53 and 54: APPENDIX 2: 1995 and 1998 Storm Com
Page 55 and 56: http://12.45.109.6/pls/portal30/get
Page 57 and 58: 50 Corralitos Creek Hydrograph & Co
Page 59 and 60: Figure 16 - San Benito River channe
Page 61 and 62:
Fig 15 Stream Barb Structures DRAFT
Page 63 and 64:
Corps’ Data presented Alternative
Page 65 and 66:
California State University Robert
Page 67 and 68:
. illustrations, on an interim repo
Page 69 and 70:
APPENDIX 3 Streambank Property Owne
Page 71:
Historical Change in San Benito Riv
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