1、Designation: D8107 17Standard Practice forDetermining Sediment Pond Skimmer Flow Rate1This standard is issued under the fixed designation D8107; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in
2、 parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This practice covers the setting up and running of a testto determine the clear water flow rate at various depths of afloating sediment pond ski
3、mmer.1.2 This practice is limited to large-scale test conditions,and does not address hydraulic modeling or pipe-flow basedcalculations.1.3 The values stated in SI units are to be regarded as thestandard.1.4 All observed and calculated values shall conform to theguidelines for significant digits and
4、 rounding established inPractice D6026, unless superseded by this standard.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determin
5、e the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D653 Terminology Relating to Soil, Rock, and ContainedFluidsD3740 Practice for Minimum Requirements for AgenciesEngaged in Testing and/or Inspection of Soil and Rock asUsed in Engineering Design an
6、d ConstructionD6026 Practice for Using Significant Digits in GeotechnicalData3. Terminology3.1 DefinitionsFor definitions of other terms used in thispractice, refer to Terminology D653.3.2 Definitions of Terms Specific to This Standard:3.2.1 floating sediment pond skimmer, na buoyant devicethat rele
7、ases/drains water from the surface of sediment ponds,traps or basins at a controlled rate of flow.4. Summary of Practice4.1 This practice is for evaluating the clear water flow rateof a floating sediment pond skimmer versus pond depth,including details for setting up a performance test that can beus
8、ed for design characterization as well as quality assurance todetermine product conformance to project specifications.5. Significance and Use5.1 This practice covers the guidelines, requirements andprocedures for evaluating the flow rate of a floating sedimentpond skimmer versus pond depth. This pra
9、ctice refers tolarge-scale testing procedures, and is patterned after conditionstypically found on construction sites within a sediment basin.This practice outlines test preparation, test execution, datacollection, data analysis and reporting procedures for any sizecalibrated basin.6. Apparatus6.1 A
10、pparatus/Facility:6.1.1 Testing is performed in a calibrated basin (that is, ithas a known surface area at any known depth) of sufficient sizeto facilitate multiple, accurate depth readings under the ex-pected flow rates, but not less than 0.9 m deep 1.2 m wide 6.1 m long. A typical basin is shown i
11、n Fig. 16.1.2 The basin shall be outfitted with a skimmer dischargepipe having a diameter no smaller than that of the pipe joiningit to the floating skimmer head. The discharge pipe shall havea valve or stopper that can be controlled or removed/replacedfrom the outside of the basin to initiate and s
12、top flow throughthe skimmer. It is also recommended to also have a valveddrainage pipe to enable lowering of the water surface withinthe basin if desired to take flow rate measurements at variousdepths without waiting for discharge exclusively through theskimmer.6.1.3 A water supply connected to the
13、 basin either via agravity flow system or a pump and associated piping is neededto fill the calibrated basin. A depth measuring system, such asa calibrated ruler mounted on the side of the basin shall beprovide for the measurement of water depth during the test.The depth measuring system must not be
14、 moved, repositioned,1This test method is under the jurisdiction ofASTM Committee D18 on Soil andRock and is the direct responsibility of Subcommittee D18.25 on Erosion andSediment Control Technology.Current edition approved Feb. 1, 2017. Published February 2017. DOI: 10.1520/D8107-172For referenced
15、 ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Consh
16、ohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Org
17、anization Technical Barriers to Trade (TBT) Committee.1jarred, and tampered with once the first reading of eachreplicate has been taken. The depth measuring system may bepaired with volume calculations or an automated flow gauge.6.2 Test Set-Up:6.2.1 The skimmer is attached to the discharge pipe pri
18、or topond filling using reducers/connectors as directed by the client.The connection must be watertight so that all discharge isthrough the floating skimmer headworks/inlet. (See Fig. 2.)6.3 Pre-Test DocumentationMaintain a test folder foreach test, including the following information:6.3.1 Calibrat
19、ed basin dimensions and pictures of the testsetup.6.3.2 Product manufacturer; product name; description;specifications; size; and a picture of the material, if practical.6.3.3 Technician identification and date/time of testing.6.4 Test Operation and Data Collection:6.4.1 With the valve on the discha
20、rge pipe closed, and theskimmer to be tested in place, fill the test basin with water tothe maximum desired depth. Filling should proceed slowlyenough to allow all air within the skimmer assembly to bleedcompletely during filling.6.4.2 Once the basin is filled to the desired depth, allow thewater su
21、rface to become still and record the depth on the rulermounted to the sidewall.6.4.3 Open the discharge pipe valve and start timing whenwater begins exiting the discharge pipe.6.4.4 Record depth and associated time at least every minuteuntil the flow stops or the skimmer is resting on the bottom oft
22、he basin.6.4.5 Record and tabulate water surface elevation as afunction of time.6.4.6 From the change in surface elevation with time,calculate flow rate between each data point in accordance withEq 1.Depth12 Depth2!*Basin Area /Time22 Time1! (1)6.4.7 Repeat the test two more times on each skimmer st
23、yle(size).6.4.8 Plot flow rate versus depth and fit a trendline to thedata to establish the flow rate versus depth relationship for thetested device.7. Report7.1 Report at a minimum the following information:7.1.1 General information, including test facility location,date, time and operator(s),7.1.2
24、 Test basin configuration and preparation,7.1.3 Calibration data,7.1.4 Materials documentation including skimmer materialand installation description,7.1.5 Test operation, data collected, and data analysis.8. Precision and Bias8.1 No statement is made about either the precision or biasof this practi
25、ce.9. Keywords9.1 floating pond skimmer; sediment pond outletFIG. 1 Typical Testing Basin (in background)FIG. 2 Schematic of SetupD8107 172ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this s
26、tandard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years
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28、, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2
29、959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 173
