1 / 20

Intro to Computation of Suspended-Sediment Records

Intro to Computation of Suspended-Sediment Records. Sediment Records Computation and Interpretation USGS National Training Center Course SW2096 Lakewood, CO September 18-21, 2017 Jeb Brown (jebbrown@usgs.gov) NMWSC – Albuquerque, NM. Introduction:.

louiscraig
Download Presentation

Intro to Computation of Suspended-Sediment Records

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Intro to Computation of Suspended-Sediment Records Sediment Records Computation and Interpretation USGS National Training Center Course SW2096 Lakewood, CO September 18-21, 2017 Jeb Brown (jebbrown@usgs.gov) NMWSC – Albuquerque, NM

  2. Introduction: • A sediment record is a collection of periodic, daily, monthly, or annual sediment discharge, expressed as a mass (tons) per unit of time, computed (estimated) by utilizing sediment-sample concentration data obtained at a station (cross-section), water discharge, and sometimes surrogate data on a flowing stream.

  3. Agenda • Types of Records • Types of Data • Records Processing • Station Analysis • Review • Basin Balancing

  4. Types of Records: A. Periodic • 1. Instantaneous - discrete samples • 2. Representative - transport curve

  5. Types of Records (cont.) B. Continuous • 1. Storm • 2. Seasonal • 3. Daily • 4. Yearly

  6. Types of Data A. Sediment • 1. Suspended sediment concentration a. X-sections--monthly and storm periods b. Observer, automated samples • 2. Particle-size distribution a. Suspended sediment • Bed material • Bedload

  7. Types of Data (cont.) B. Ancillary Data • 1. Water discharge • 2. Stage • 3. Temperature • 4. Surrogate

  8. Records Processing A. Checklist • Sediment Discharge Measurement Sheet • 1. Cross section samples • 2. Point or single vertical samples • 3. Coefficients

  9. Records Processing (cont.) C. Sediment Transport Curve • 1. Instantaneous • 2. Daily • 3. Regression for the surrogate

  10. Records Processing (cont.) • Plotting of Surrogate Data • Temporal Concentration Curve F. Daily Sediment Discharge Calculation • 1. Low flow • 2. Uniform flow • 3. High flow (Subdividing) • 4. Surrogate/SSC relationship development

  11. Records Processing (cont.) G. Coefficients 1. Lecture on Tuesday H. Estimates • 1. Transport curve • 2. Hydrograph

  12. Basin Balancing • Multi stations in a basin • Check downstream flow of sediment load • Cross check between sub-basins

  13. Station analysis • Sampling program • Summary of samples collected • Observer • Surrogate record • Coefficients • Discharge computations • Remarks

  14. Review • Evaluate concentration curve • Evaluate application of coefficients • Complete and evaluate station analysis • All-Important review/check procedure: Primary reviewer followed by Record Approver

  15. ANY QUESTIONS ?

  16. Jeb’s Work Flow: • Download and gather all appropriate data • Cursory review (the fun part!) • Verify samples, add estimates • Calculate coefficients, calculate loads • Finish up station analysis • Load data into Aquarius • Check/Review

More Related