SURFACE-WATER FIELD TECHNIQUES

Spokane River at Spokane, Washington - n = 0.038

(Source: U.S.G.S Water Supply Paper 1849)

Site Description

Reach properties

Plan sketch and cross sections

Site photos

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Site Description

• Station name	Spokane River at Spokane, Washington
  Station number	12-4225
  Gage location	Lat 47°39'35'', long 117°26'50'', in SW 1/4 sec. 13, T. 25 N., R. 42 E., on right bank at Cochran street in Spokane, 0.5 mile upstream from Latah Creek. Section 1 is about 800 ft upstream from gage.
  Drainage area	4,290 sq mi.
  Date of flood	May 31, 1948
  Gage height	28.35 ft at gage: 29.37 ft at section 1.
  Peak discharge	39,600 cfs
  Computed roughness coefficient	Manning n = 0.038
  Description of channel	Bed is gravel and boulders; d50 = 195 mm, d84 = 360 mm.Banks are lined with trees and brush.

  Introduction Page || Site Description || Reach Properties

  Plan Sketch and Cross Sections || Site Photos

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Reach Properties

• Section	Area (sq ft)	Top Width (ft.)	Mean depth (ft)	Hydraulic radius (ft)	Mean velocity (ft per sec)	Lenght (ft) between sections	Fall (ft) between sections
  1	4,350	305	14.3	14.03	9.10	.......	.....
  2	4,370	298	14.7	14.38	9.06	202	0.44
  3	4,290	285	15.1	14.71	9.23	268	.49
  4	4,120	293	14.1	13.84	9.61	220	.29

  Introduction Page || Site Description || Reach Properties

  Plan Sketch and Cross Sections || Site Photos

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Plan Sketch and Cross Sections

Plan and cross sections, Spokane River at Spokane, Washington.

• Introduction Page|| Site Description || Reach Properties

  Plan Sketch and Cross Sections || Site Photos

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Site Photos

Photo 162: Upstream along right bank from section 4, Spokane River at Spokane, Washington.

Photo 163: Upstream along left bank from section 4, Spokane River at Spokane, Washington.

Introduction Page || Site Description || Reach Properties

Plan Sketch and Cross Sections || Site Photos

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