ASTM D6629-2001(2012)e1 0000 Standard Guide for Selection of Methods for Estimating Soil Loss by Erosion《由于腐蚀引起的土壤损耗的评价方法选择的标准指南》.pdf
《ASTM D6629-2001(2012)e1 0000 Standard Guide for Selection of Methods for Estimating Soil Loss by Erosion《由于腐蚀引起的土壤损耗的评价方法选择的标准指南》.pdf》由会员分享,可在线阅读,更多相关《ASTM D6629-2001(2012)e1 0000 Standard Guide for Selection of Methods for Estimating Soil Loss by Erosion《由于腐蚀引起的土壤损耗的评价方法选择的标准指南》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D6629 01 (Reapproved 2012)1Standard Guide forSelection of Methods for Estimating Soil Loss by Erosion1This standard is issued under the fixed designation D6629; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1NOTE6.1.1 was editorially revised in May 2012.1. Scope1.1 This guide describes methods used for estimating soillosses due to r
3、ill and interrill erosion. All known methods forwater erosion with a sediment yield component are listed. Thisguide provides complete reference citations for the variousmethods currently used to estimate soil loss by rill and interrillerosion. The referenced methods contain the rationale anddetailed
4、 procedures for determining rill and interrill soil loss.For each method listed, specific applicability, limitations, andlevel of complexity are briefly outlined in terms of the relativespatial scale, land use, hydrology, erosion, time scale, inputrequirements, and output.1.2 The referenced methods
5、were developed for specificuses and may not be applicable in all cases. For example, someof the values derived by these methods estimate the amount ofsoil movement on a field without re-deposition while othersaccount for re-deposition and estimate off-field sediment yield.Most of these methods are n
6、ot intended to predict sedimentyield.1.3 Metric (SI) Units. Some of the methods in this guide arewritten in the preferred English units. A discussion of theconversion of the final answer to metric units is included inparagraph 6.2.1.4 This guide offers an organized collection of informationor a seri
7、es of options and does not recommend a specificcourse of action. This guide cannot replace education orexperience and should be used in conjunction with professionaljudgement. Not all aspects of this guide may be applicable inall circumstances. This guide is not intended to represent orreplace the s
8、tandard of care by which the adequacy of a givenprofessional service must be judged, nor should this guide beapplied without consideration of a projects many uniqueaspects. The word “Standard” in the title of this guide has beenapproved through the ASTM consensus process.1.5 This standard does not p
9、urport 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 determine the applica-bility of regulatory requirements prior to use.2. Referenced Documents2.1 ASTM Standards:
10、2D653 Terminology Relating to Soil, Rock, and ContainedFluids3. Terminology3.1 While most of the terms used in this guide conform toTerminology D653, some are unique to this guide. These termsrelate to soil erosion and are used frequently in the methodsoutlined in this guide.NOTE 1The Natural Resour
11、ces Conservation Service was formerlythe Soil Conservation Service.3.2 Definitions:3.2.1 agronomythe science of field crop production andsoil management.3.2.2 denudationthe sum of the processes that result in thewearing away or the progressive lowering of the earths surfaceby weathering, mass wastin
12、g, or transportation; also thecombined destructive effects of such processes.3.2.3 erodibilitythe degree to which a soil is susceptible toerode. Some soils erode more readily than others due to the soilproperties.3.2.4 erosionthe wearing away of soil and rock byweathering, mass wasting, and the acti
13、on of streams, glaciers,waves, wind, and underground water.3.2.5 fallowallowing cropland to lie idle, either tilled oruntilled, during the whole or greater portion of the growingseason.3.2.6 fertility (soil)the quality of a soil that enables it toprovide nutrients in adequate amounts and in proper b
14、alance1This guide is under the jurisdiction ofASTM Committee D18 on Soil and Rockand is the direct responsibility of Subcommittee D18.22 on Soil as a Medium forPlant Growth.Current edition approved May 15, 2012. Published December 2012. Originallyapproved in 2001. Last previous edition approved in 2
15、007 as D6629 01(2007).DOI: 10.1520/D6629-01R12E1.2For referenced 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 AS
16、TM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1for the growth of specified plants when other growth factors,such as light, moisture, temperature, and the physical conditionof the soil are favorable.3.2.7 mulcha natural or artificial layer of sui
17、table materi-als that aid in soil stabilization and soil moisture conservation,thus providing micro-climatic conditions suitable for germina-tion and growth.3.2.8 pasturean area devoted to the production of forage,introduced or native, and harvested by grazing.3.2.9 rilla small, intermittent water c
18、ourse with steepsides, usually only a few inches deep and, therefore, noobstacle to tillage operations.3.2.10 seedbedthe soil prepared by natural or artificialmeans to promote the germination of seed and the growth ofseedlings.3.2.11 soil lossfor the purpose of this guide, soil lossrefers to the mov
19、ement of soil particles from their pre-erosionlocation.3.2.12 tillagethe operation of implements through the soilto prepare seedbeds and rootbeds, control weeds and brush,aerate the soil, and enhance breakdown of organic matter andminerals to release plant foods.4. Summary of Guide4.1 This guide pro
20、vides guidance in selecting methods forestimating soil loss by rill and interrill erosion and in predictingthe effects of various soil management practices on soil loss.5. Significance and Use5.1 A variety of methods exist for this measurement. Eachmethod has its specific applicability, limitations,
21、 and levels ofcomplexity. The users of this guide should use the descriptionsof the various methods to choose the procedure, which mostclosely meets their needs. Most of these methods are notintended to predict sediment yield (6).5.2 These methods are used to estimate the soil loss (in massof soil/u
22、nit area/unit time) from rainfall and snow melt forsite-specific factors due to rill and interrill erosion. Thesemethods can not be used to estimate soil loss from ephemeralgully or channel erosion.5.3 The estimates resulting from the methods in this guidedo not constitute a design for control of er
23、osion. However, theoutputs of these methods may be important input into such adesign.6. Procedure6.1 The following references provide detailed informationand procedures as follows:6.1.1 Agricultural Non-Points Source (AGNPS)Reference: Young, R.A., C.V. Alonso, and R.M. Summer, Modelinglinked watersh
24、ed and lake processes for water quality manage-ment decisions, Journal of Environmental Quality, July/September 1990, Volume 19 (3), p. 421-427. Young, R.A., C.A. Onstad, D.D. Bosch, and W.P.Anderson, AGNPS: a nonpoint source pollution model forevaluating agricultural watersheds, Journal of Soil and
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