Aerial Photo Tour:
Gualala River watershed
October 8, 2007
Friends of the Gualala River (FoGR), with assistance from LightHawk and Gabrielle and Ken Adelman, captured over 1,100 aerial photographs of the Gualala River watershed during a helicopter flight on Monday, October 8, 2007.
2007 Photo Galleries
- Aerial Photos by Jamie Hall (JH)
- Aerial Photos by Ken Adelman (KH)
- Photo Tour via Google Earth [kmz file]
2005 Photo Gallery
Jamie Hall's 2007 aerial photos are presented at medium size (526x350), so each image will load quickly, even using a slow dial-up connection to the internet. High resolution images are available on request.
If you have a high-speed broadband connection, you can view Adelman's 2007 photos via Google Earth, which shows the precise location of each image on an interactive satellite map.
Google Earth: each camera icon represents the location of a photograph
[download Google Earth]
How the flight was organized
We contacted LightHawk, a nonprofit organization with volunteer pilots around the country who take environmental organizations up for aerial photography. LightHawk had arranged two flights over the Gualala River watershed for FoGR in past years.
At first there were no pilots available, but then a LightHawk volunteer called to say that a team had volunteered; he said he thought it was a helicopter and that the husband took photos. This turned out to be Gabrielle and Ken Adelman, the couple who created the California Coastal Records Project, with whom we flew two years ago.
Annotated Photo Tour
On Monday, October 8, 2007, Gabrielle and Ken Adelman arrived at the Gualala Airport in their Robinson R44 helicopter just before 11:00 a.m. The four of us loaded up, Gabrielle flying the helicopter, Ken in the left front seat taking photos with his Nikon digital camera, which is linked to the GPS unit. Peter Baye was in the right rear, and Jamie Hall was in the left rear with his camera; both left doors were off.
We headed south along the North Fork Gualala River past an herbicided area (photos 6387-6388 JH) and Elk Prairie (Photos 6389 & 6390 JH). Ken took photos continuously at a set focal length and Jamie took closeup photos and overall shots of the same areas, with Peter giving a running account of the flora and hydrological processes and pointing out features to get specific photos.
herbicided area (6387 JH)
Elk Prairie (6389 JH)
The first gravel mining site was #100 (photos 6418-6427 JH and 5782-5796 KA). Site numbers are designated by the gravel company and marked on a map in the Mitigated Negative Declaration document. We photographed the flat, almost featureless expanse of gravel left by the gravel mining operation, which had changed little from its last excavation date due to the lack of high water flow last winter.
gravel mining site #100 (6418 JH)
old clearcut (6484 JH)
We proceeded down the river past old clearcuts, the first of which had recently had the conifers thinned (photos 6484-6486 JH) and associated gravel deposition at the base of these features (photos 6484-6490 JH and 6501-6524 JH).
The next major site was Valley Crossing, which we circled twice photographing the gravel plant, sites # 370 and 385, the flat featureless expanse of these overworked gravel excavation sites being readily apparent (photos 6550-6578 JH and 5968-5975 KA), and the very small waste water (runoff from gravel collected) collection ponds (photos 6548-6549 JH and 6581 JH and 5944-5945 KA).
Valley Crossing gravel plant (6550 JH)
We proceeded south from there on the South Fork to four sites # 405, 415, 445 & 465, (photos 6591-6663 JH and 6014-6077 KA). The South Fork south of Valley Crossing being a much narrower valley with more large trees and better overall canopy cover.
South Fork gravel mining site (6591 JH)
From there we headed back up to Valley Crossing and eastward on the Wheatfield fork. At this point Peter points out the willow cover just east of Valley Crossing (photos 6672-6677 JH and 6091-6100 KA), which catches gravel and woody debris creating a more complex channel with better pools.
Then we went to the last two gravel extraction sites # 62 and 70, (photos 6685-6697 JH and 6111-6120 KA), site 62 being the site excavated in the 2005 season. This site is still a rather large depression with very little aggregate replenishment due to low winter water flows.
gravel extraction sites #62 (6687 JH)
We photographed gravel bars east up the Wheatfield until we came to the Peay vineyard, first planting in 1999 (photos 6729-6745 JH and 6161-6169 KA).
Peay vineyard (6729 JH)
Next we photographed the Putnam / Bryce Jones vineyards at the old hollow tree store / mill site. This site shows recent activity compared to our 2005 flight, a large new addition to the existing vineyard acreage and a very large reservoir were added in the last year, (photos 6739-6765 JH and 6170-6183 KA).
Putnam / Bryce Jones vineyards (6739 JH)
Bryce Jones (Baldy) was next (photos 6769-6779 JH and 6186-6189 KA). The changes compared to previous flights are obvious. New vineyard areas on the north side and center of this vineyard have been developed in the last few years; there is also a small mill site adjacent to the area that burned in 2005. The Artesa property can be seen in the background of these photos.
Bryce Jones (Baldy) vineyard (6769 JH)
The Campbell vineyard was next, recent activity on the east side of this property can be clearly seen, several acres of clearcut which we photographed in progress in 2005. (Photos 6780-6797 JH and 6190-6202 KA)
Campbell vineyard (6780 JH)
Evans Ridge (part of the so-called "Preservation" Ranch) is next, no noticeable change (photos 6798-6821 JH and 6203-6210 KA).
Evans Ridge (6798 JH)
Brushy Ridge Loop is next, including shots of the Roessler, Ridge Top Partners and Wilson projects (photos 6829_6850 JH and 6211-6219 KA).
Brushy Ridge Loop (6829 JH)
From there we headed back to Gualala where we photographed the main stem of the Gualala River and the estuary extensively (photos 6872-6961 JH and 6227-6292 KA). Peter noted that we could see the algae and plant covered rocks on the bottom.
Gualala River main stem & estuary (6872 JH)
Finally some shots of the Gualala Airport (photos 6972-6981 JH), with the flight ending about 12:10 p.m.
Gualala Airport (6972 JH)
Jamie included a few shots of the chopper and the Adelmans (photos 6982-6984 JH).
Photo documentation of gravel mining impacts
Friends of the Gualala River obtained aerial photos of the gravel mining areas in the Gualala River for the purpose of reviewing and critiquing the instream gravel mining operation on the South Fork and Wheatfield Fork.
Gravel mining proceeded in 2005 and 2006 without County or federal permits; applications for permits are being reviewed by regulatory agencies in the fall of 2007.
One of the most obvious at-a-glace features seen in the aerial photos is that most gravel bars areeither covered with or bordered by mature willow, alder, and torrentsedge (riparian vegetation), EXCEPT the regularly mined areas thatperpetuate gravel barrens.
Valley Crossing (6567 JH)
These perpetually devegetated bars are likeopen solar heating panels, and remain so low and flat that high flowsspread out over them instead of confining their scouring to the mainstem (thalweg, single-thread channel).
South Fork (6631 JH)
The mature riparian woodlands on bars are able to trigger log jams anddebris jams, and trap sediment (including fine sediment), pulling it outof the active channel and stabilizing it. In contrast, mining the barsremoves the coarse upper "armor" layer that traps finer silt and sandbelow it, in the pores (interstices) of gravels, and releases it fortransport during floods.
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