Images

USGS Pacific Coastal and Marine Science Center’s research vessel R/V Parke Snavely motors on the Nisqually Reach of Puget Sound.

After floods, USGS scientists use indirect indicators to determine the extent and height of flooding. Debris caught on trees and fences is one such indicator.

A USGS Technician attaches a high water marker to a tree. Debris wedged on the tree indicates the height that flood waters reached. A comprehensive survey of these markers allows scientists to determine the size of floods. 

Eruptions in the Cascade Range during the past 4000 years. USGS GIP 64

Sunrise on Pompey Peak, Washington.

Specific Pathogen-Free (SPF) Pacific herring reared in the wet laboratory at the Marrowstone Marine Field Station.

Train tracks and overwater structures along Browns Bay in Edmonds, Washington often occur on developed shorelines of Puget Sound. The built environment can interrupt the flow of sediment from back-beach bluffs to the intertidal zone, attenuate and redirect alongshore currents, and reduce upper beach habitat.

A landscape photograph of a valley with a mountain in the background. The valley consists of forests and residential housing.

Subalpine meadow near Deer Park campground on the Olympic Peninsula in Washington.

USGS scientist observing Mount St. Helens' crater and dome from the Brutus Camera station.

Typical clinical signs of SVC disease, exopthalmia and abdominal distension with hemorrhaging seen in a virus-exposed fathead minnow.

Mount Adams western profile as seen from Mount St. Helens.

Crest gages record high flows. In this case, pieces of cork floating in a tube record the highest level that water reached during a storm event. A technician records the level with a tape measure.

High flows and floods affected several Western Washington rivers in November 2006. This photo shows a hydrologic technician preparing to measure the Puyallup River near Orting, WA from a cableway.

A USGS hydrologic technician adjusts equipment while preparing to make a measurement from a cableway. Cableways provide technicians with a way to safely measure fast-flowing rivers. 

November 2006 recorded extensive flooding across Western Washington. High flows transported large amounts of sediment and large wood, as shown in this photograph taken near USGS streamgage 12093500.

In November 2006, flooding damaged infrastructure alongside several rivers in Western Washington. This photograph shows where Puyallup River eroded parts of the riverbank near USGS streamgage 12092000.

In November 2006, the Puyallup River overtopped its banks in several locations, including near USGS streamgage 12096500. Flood waters carried sediment and large wood.

Figure 1. Appearance of descaling site exposed to fast green FCF dye six hours after intentional descaling injury, showing loss of scales and presence of fast green staining. Areas of unintentional integumental injury are also stained (arrows).

Related image Figure 2.

Figure 2. Scanning electron micrograph of descaling area delimited by box in Figure 1 showing epidermal disruption, empty scale pockets and an exposed scale with visible concentric ridges (upper right). Scale bar = 500 µm.

Figure 3. Appearance of descaling site exposed to fast green FCF dye 96 hours after intentional descaling injury, showing lack of scales, presence of fast green staining in areas of epidermal disruption and absence of staining in areas where migrating epidermal cells have closed the wound.