Report PDF (3.7 MB) - USGS

More documents

Recommendations

Info

24 Surrogate Technologies to Estimate Suspended Sediment, Clearwater River, Idaho, and Snake River, Wash., 2008–10 450,000 400,000 350,000 A. EXPLANATION 3-MHz_ABS corr Model 2008–10 sediment-transport curve 1970s sediment-transport curve 300,000 250,000 200,000 150,000 Suspended-sediment load, in tons per month 100,000 50,000 0 2,000,000 1,800,000 1,600,000 B. EXPLANATION 1.5-MHz_ABS corr Model 2008–10 sediment-transport curve 1970s sediment-transport curve 1,400,000 1,200,000 1,000,000 800,000 600,000 400,000 200,000 0 Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec. Figure 12. Total suspended-sediment load by month based on a surrogate model with acoustic backscatter and 2008–10 and 1970s sediment-transport curves for the (A) Clearwater River at Spalding, Idaho, May 2008–September 2010, and (B) Snake River near Anatone, Washington, April 2009–September 2010. NOTE: Each month represents the total load that occurred during that month within the study period. For example, the total load for May in the Clearwater River is the sum of loads measured in May 2008, May 2009, and May 2010. tac13-0799_fig 12
Use of Surrogate Models To Estimate Suspended Sediment 25 Table 4. Comparison of suspended sediment loads during selected storm events estimated using acoustic backscatter and sediment-transport curves based on 2008–10 streamflows in the Clearwater River at Spalding, Idaho, and Snake River near Anatone, Washington. [Abbreviations: ABS corr , acoustic backscatter corrected for beam spreading and attenuation by water and sediment in decibels (dB); na, not applicable] Site Event No. Event dates Sediment load for ascending limb of hydrograph (tons) 3-MHz_ABS corr or 1.5- MHz_ABS corr model 2008–10 sediment transport curve Percent difference Sediment load for descending limb of hydrograph (tons) 3-MHz_ABScorr or 1.5-MHz_ABS corr model 2008–10 sediment transport curve Percent difference Clearwater River na na – All 7 events combined 172,000 148,000 -15 131,000 178,000 30 1 May 13–24, 2008 59,400 56,700 -5 13,000 18,800 36 2 November 12–30, 2008 2,070 1,120 -60 3,750 2,850 -27 3 January 1–12, 2009 2,950 790 -116 3,540 2,700 -27 4 April 21–May 1, 2009 13,000 12,900 -1 17,700 24,600 33 5 May 18–June 12, 2009 9,130 8,170 -11 51,100 62,600 20 6 May 14–26, 2010 14,700 11,200 -27 7,370 10,200 32 7 June 2–July 5, 2010 70,600 57,200 -21 34,900 56,000 46 Snake River na na –All 6 events combined 585,000 409,000 -35 762,000 1,260,000 49 1 April 18–May 3, 2009 122,000 68,500 -56 89,600 113,000 23 2 May 5–11, 2009 48,600 39,400 -21 24,400 31,200 24 3 May 18–24, 2009 98,400 84,100 -16 106,000 129,000 20 4 April 20–27, 2010 15,700 11,300 -33 12,100 15,300 23 5 May 16–30, 2010 33,000 26,600 -21 48,400 73,000 41 6 June 2–19, 2010 267,000 180,000 -39 481,000 895,000 60
Page 1 and 2: Prepared in cooperation with the U.
Page 3 and 4: Use of Surrogate Technologies to Es
Page 5 and 6: iii Contents Abstract .............
Page 7 and 8: v Conversion Factors and Datums Con
Page 9 and 10: Use of Surrogate Technologies to Es
Page 11 and 12: Introduction 3 The Lower Granite Lo
Page 13 and 14: Site Descriptions and Surrogate Ins
Page 15 and 16: Site Descriptions and Surrogate Ins
Page 17 and 18: Methods 9 Surrogate Instrument Data
Page 19 and 20: Methods 11 Acoustic Absorption by S
Page 21 and 22: Use of Surrogate Models To Estimate
Page 31: Use of Surrogate Models To Estimate
Page 35 and 36: References Cited 27 Summary and Con
Page 37 and 38: References Cited 29 SonTek/Yellow S
Page 39 and 40: Publishing support provided by the

Report PDF (3.7 MB) - USGS

Create successful ePaper yourself

Delete template?

Save as template?