The effects of ground water, slope stability, and seismic hazard on the stability of the South Fork Castle Creek Blockage in the Mount St. Helens Area, Washington:
Gespeichert in:
| Format: | Buch |
|---|---|
| Sprache: | English |
| Veröffentlicht: |
Washington
US Gov. Print. Off.
1985
|
| Schriftenreihe: | Geological Survey <United States>: Geological Survey professional paper
1345 |
| Schlagworte: | |
| Online-Zugang: | Inhaltsverzeichnis |
| Beschreibung: | IV, 42 S. Ill., graph. Darst., Kt. |
Internformat
MARC
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| 245 | 1 | 0 | |a The effects of ground water, slope stability, and seismic hazard on the stability of the South Fork Castle Creek Blockage in the Mount St. Helens Area, Washington |c by William Meyer ... |
| 264 | 1 | |a Washington |b US Gov. Print. Off. |c 1985 | |
| 300 | |a IV, 42 S. |b Ill., graph. Darst., Kt. | ||
| 336 | |b txt |2 rdacontent | ||
| 337 | |b n |2 rdamedia | ||
| 338 | |b nc |2 rdacarrier | ||
| 490 | 1 | |a Geological Survey <United States>: Geological Survey professional paper |v 1345 | |
| 650 | 4 | |a Landslides |z Washington (State) |z Castle Creek, South Fork | |
| 650 | 4 | |a Slopes (Soil mechanics) |z Washington (State) |z Castle Creek, South Fork | |
| 650 | 0 | 7 | |a Hang |0 (DE-588)4023336-4 |2 gnd |9 rswk-swf |
| 650 | 0 | 7 | |a Stabilität |0 (DE-588)4056693-6 |2 gnd |9 rswk-swf |
| 650 | 0 | 7 | |a Lavastrom |0 (DE-588)4227077-7 |2 gnd |9 rswk-swf |
| 651 | 4 | |a Saint Helens, Mount (Wash.) |x Eruption, 1980 | |
| 655 | 7 | |a South Fork Castle Creek |2 gnd |9 rswk-swf | |
| 689 | 0 | 0 | |a South Fork Castle Creek |A f |
| 689 | 0 | 1 | |a Lavastrom |0 (DE-588)4227077-7 |D s |
| 689 | 0 | 2 | |a Hang |0 (DE-588)4023336-4 |D s |
| 689 | 0 | 3 | |a Stabilität |0 (DE-588)4056693-6 |D s |
| 689 | 0 | |5 DE-604 | |
| 700 | 1 | |a Meyer, William |e Sonstige |4 oth | |
| 830 | 0 | |a Geological Survey <United States>: Geological Survey professional paper |v 1345 |w (DE-604)BV000005472 |9 1345 | |
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Datensatz im Suchindex
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| adam_text | The Effects of Ground Water, Slope
Stability, and Seismic Hazard on
the Stability of the South Fork Castle
Creek Blockage in the Mount St Helens
Area, Washington
V1 j f-s-l ?=), /o ?| i ~ 3,
By WILLIAM MEYER, M A SABOL, H X GLICKEN, and BARRY VOIGHT
USGEOLOGICALSURVEYPROFESSIONALPAPER1345
/
UNITEDSTATESGOVERNMENTPRINTINGOFFICE,WASHINGTON:1$$ ® ^
CONTENTS
r»Ki:
Abstract _ - 1
Introduction 1
Acknowledgments 2
General description of the South Fork Castle Creek blockage _ 2
Geologic setting 9
Preemption geology 9
Posteruption geology 9
Debris-avalanche deposit 12
Modern dacite, andesite, and basalt unit 12
Ancestral dacite unit 12
Blast pyroclastic-flow deposits 12
Physical properties of blockage material 13
Texture 13
Unit weight and relative density 13
Strength 15
I age
Ground-water conditions 20
Static slope-stability analysis 20
Modeled cross sections and assumptions 20
Results of static slope-stability analysis 24
Retrogressive failure analysis 25
Seismic hazard 31
Seismic history of the blockage 35
Dynamic slope-stability analysis 35
Modeled cross sections and assumptions 35
Calculation off)* 35
Results of dynamic slope-stability analysis _• 37
Displacement of sliding masses 38
Conclusions 40
References 41
ILLUSTRATIONS
FIGURES 1-6 Maps showing:
1 Location of the study ana and the Mount St Helens seismic zone 3
2 Preeruption topography nf the st idy area, prepared by the Weyerhauser Company in 1950 4
3 Posteruption topography of the South Fork Castle Creek blockage 5
4 Thickness of the South Fork Castle Creek blockage 6
5 Chronological appearance of slope-failure scarps on the South Fork Castle Creek blockage, as determined
from aerial photography 7
6 Geomorphic features mapped at South Fork Castle Creek blockage on September 22, 1982 8
7 Stereopair of aerial photographs taken of South Fork Castle Creek blockage on September 22, 1982, showing
slope-failure detachment scarp formed of multiple crescents 9
8 Map showing the geology of the study area 10
Photograph showing a typical exposure of blockage material 11
Graphs showing:
10 Results of direct shear-strength tests on the modern dacite, andesite, and basalt unit of the South Fork
Castle Creek blockage: A, peak (maximum) strength; B, ultimate strength 16
11 Results of direct shear-strength tests on the ancestral dacite unit of the avalanche debris from various
sites: A, peak (maximum) strength; B, ultimate strength 18
Map showing water-level contours for Si uth Fork Castle Creek blockage, September 20, 1983 21
Hydrographs for two selected piezometers at Coldwater Creek blockage 22
Map showing location of cross sections or South Fork Castle Creek blockage that were analyzed for slope
stability 23
Diagram showing geology and September 1983 water levels at A, cross section AA ; B, cross section BB ; C,
cross sections CD, CE, and CF; ami I), cross section GG 26
Graphs showing variation of factor-of-safety values (Fs) versus seismic coefficients (ns) for selected water levels
at all cross sections 28
17-21 Diagrams showing:
17 Critical failure surfaces predicted for A cross section BB , and B, cross section GG , with water table
at land surface and zero cohesion 30
18 Critical failure surface an l potential failure surface encompassing the largest section of the blockage for
cross sections CE and OF witf water table 25 ft above September 1983 levels and zero cohesion 31
19 Critical failure surfaces predicted for cross section AA with water table at land surface and A, 200 lb/
ft^cohesionandB,zerocohesionj__32
20 Critical failure surface and potential failure surface encompassing the largest section of the blockage
for cross sections CE and CF with water table at land surface and A, zero cohesion and B, 200 lb/ft2
cohesion I 33
21 Predicted results of retrogressive slope-failure analysis on cross sections CD and CF with September
1983 water levels plus -!5 ft and zero cohesion 34
IV CONTENTS
Page
FIGURES 22, 23 Diagrams showing:
22 Predicted results of retrogressive slope-failure analysis on cross sections CD and CF with water table
at land surface and zero cohesion 36
23 Critical surfaces and potential failure surfaces encompassing the largest sections of the blockage for cross
sections CD, CE, and CF with a seismic coefficient of 0 2 g, September 1983 water level, and zero
cohesion - - 39
24 Graph showing estimated displacement in the blockage resulting from an earthquake with an acceleration pulse
of 05g and duration of 0 1 and 0 2 seconds - 40
25 Schematic of deformation expected with high ground-water level and maximum credible earthquake magnitude 41
TABLES
Page
TABLE 1 Particle-size distribution in the South Furk Castle Creek blockage 13
2 Physical properties of the South Fork Castle Creek blockage and other sites on the debris-avalanche deposit
3 Model-predicted factors of safety IF, *) for critical failure surfaces at South Fork Castle Creek blockage for
selected positions of the water table and cohesion values - -
4 Model-predicted factors of safety (F,) for selected seismic coefficients (;i,J
5 Estimated displacement of sliding masses for selected positions of the water table at South Fork Castle
Creek blockage - 39
CONVERSION FACTORS AND ABBREVIATIONS
Multiply By To obtain
inches (in ) 25 4 millimeters (mm)
2 540 centimeters (cm)
0 0254 meters (m)
feet (ft) 0 3048 meters (m)
miles (mi) 1 609 kilometers (km)
square feet (ft2) 0 09294 square meters (m2)
square miles (mi2) 2 590 square kilometers (km2)
cubic feet (ft3) 0 02832 cubic meters (m3)
acre-feet (acre-ft) 1,233 0 cubic meters (m3)
0 001233 cubic hectometers (hm3)
gallons per minute (gal/min) 0 06309 liters per second (L/s)
gallons per day (gal/d) 3 785 liters per day (L/d)
million gallons per day (Mgal/d) 3,785 0 cubic meters per day (m3/d)
feet per second (ft/s) 0 3048 meters per second (m/s)
pounds (lb) 0 4536 kilograms (kg)
pounds per cubic foot (lb/ft3) 16 02 kilograms per cubic meter (kg/m3)
Tons, short, per square foot (ton/ft2) 9,765 0 kilograms per square meter (kg/m2)
millimeters (mm) 0 03937 inches (in )
centimeters (cm) 0 3937 inches (in )
acceleration of gravity (g)=%1 feet per second squared, or 980 665 centimeters per second squared
National Geodetic Vertical Datum of 1929 (NGVD of 1929): A geodetic datum derived from a general adjustment of the first-order level nets of
both the United States and Canada, formerly called moan sea level NGVD of 1929 is referred to as a sea level in this report
Tallany, Van Kuren, Gertis, and Thielman Datum of 1981 (TVGT of 1981): Datum derived from reference marks and surveyed at 1-mile intervals
by TVGT and from auxiliary elevation control points surveyed by SPAN International, Inc Specified accuracies were third order for reference
marks and to 3 feet for auxiliary points
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| genre | South Fork Castle Creek gnd |
| genre_facet | South Fork Castle Creek |
| geographic | Saint Helens, Mount (Wash.) Eruption, 1980 |
| geographic_facet | Saint Helens, Mount (Wash.) Eruption, 1980 |
| id | DE-604.BV000529292 |
| illustrated | Illustrated |
| indexdate | 2024-07-09T15:15:16Z |
| institution | BVB |
| language | English |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-000326474 |
| oclc_num | 490178526 |
| open_access_boolean | |
| owner | DE-12 DE-19 DE-BY-UBM |
| owner_facet | DE-12 DE-19 DE-BY-UBM |
| physical | IV, 42 S. Ill., graph. Darst., Kt. |
| publishDate | 1985 |
| publishDateSearch | 1985 |
| publishDateSort | 1985 |
| publisher | US Gov. Print. Off. |
| record_format | marc |
| series | Geological Survey <United States>: Geological Survey professional paper |
| series2 | Geological Survey <United States>: Geological Survey professional paper |
| spelling | The effects of ground water, slope stability, and seismic hazard on the stability of the South Fork Castle Creek Blockage in the Mount St. Helens Area, Washington by William Meyer ... Washington US Gov. Print. Off. 1985 IV, 42 S. Ill., graph. Darst., Kt. txt rdacontent n rdamedia nc rdacarrier Geological Survey <United States>: Geological Survey professional paper 1345 Landslides Washington (State) Castle Creek, South Fork Slopes (Soil mechanics) Washington (State) Castle Creek, South Fork Hang (DE-588)4023336-4 gnd rswk-swf Stabilität (DE-588)4056693-6 gnd rswk-swf Lavastrom (DE-588)4227077-7 gnd rswk-swf Saint Helens, Mount (Wash.) Eruption, 1980 South Fork Castle Creek gnd rswk-swf South Fork Castle Creek f Lavastrom (DE-588)4227077-7 s Hang (DE-588)4023336-4 s Stabilität (DE-588)4056693-6 s DE-604 Meyer, William Sonstige oth Geological Survey <United States>: Geological Survey professional paper 1345 (DE-604)BV000005472 1345 HEBIS Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=000326474&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | The effects of ground water, slope stability, and seismic hazard on the stability of the South Fork Castle Creek Blockage in the Mount St. Helens Area, Washington Geological Survey <United States>: Geological Survey professional paper Landslides Washington (State) Castle Creek, South Fork Slopes (Soil mechanics) Washington (State) Castle Creek, South Fork Hang (DE-588)4023336-4 gnd Stabilität (DE-588)4056693-6 gnd Lavastrom (DE-588)4227077-7 gnd |
| subject_GND | (DE-588)4023336-4 (DE-588)4056693-6 (DE-588)4227077-7 |
| title | The effects of ground water, slope stability, and seismic hazard on the stability of the South Fork Castle Creek Blockage in the Mount St. Helens Area, Washington |
| title_auth | The effects of ground water, slope stability, and seismic hazard on the stability of the South Fork Castle Creek Blockage in the Mount St. Helens Area, Washington |
| title_exact_search | The effects of ground water, slope stability, and seismic hazard on the stability of the South Fork Castle Creek Blockage in the Mount St. Helens Area, Washington |
| title_full | The effects of ground water, slope stability, and seismic hazard on the stability of the South Fork Castle Creek Blockage in the Mount St. Helens Area, Washington by William Meyer ... |
| title_fullStr | The effects of ground water, slope stability, and seismic hazard on the stability of the South Fork Castle Creek Blockage in the Mount St. Helens Area, Washington by William Meyer ... |
| title_full_unstemmed | The effects of ground water, slope stability, and seismic hazard on the stability of the South Fork Castle Creek Blockage in the Mount St. Helens Area, Washington by William Meyer ... |
| title_short | The effects of ground water, slope stability, and seismic hazard on the stability of the South Fork Castle Creek Blockage in the Mount St. Helens Area, Washington |
| title_sort | the effects of ground water slope stability and seismic hazard on the stability of the south fork castle creek blockage in the mount st helens area washington |
| topic | Landslides Washington (State) Castle Creek, South Fork Slopes (Soil mechanics) Washington (State) Castle Creek, South Fork Hang (DE-588)4023336-4 gnd Stabilität (DE-588)4056693-6 gnd Lavastrom (DE-588)4227077-7 gnd |
| topic_facet | Landslides Washington (State) Castle Creek, South Fork Slopes (Soil mechanics) Washington (State) Castle Creek, South Fork Hang Stabilität Lavastrom Saint Helens, Mount (Wash.) Eruption, 1980 South Fork Castle Creek |
| url | http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=000326474&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| volume_link | (DE-604)BV000005472 |
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