ASTM D6629-2001(2007) 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的选择的标准指南》.pdf
《ASTM D6629-2001(2007) 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的选择的标准指南》.pdf》由会员分享,可在线阅读,更多相关《ASTM D6629-2001(2007) 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的选择的标准指南》.pdf(5页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 6629 01 (Reapproved 2007)Standard Guide forSelection of Methods for Estimating Soil Loss by Erosion1This standard is issued under the fixed designation D 6629; 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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This guide describes methods used for estimating soillosses due to rill and interrill erosion. All known methods
3、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 procedures for determining rill and interril
4、l 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 were developed for specificuses and may not b
5、e 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 not intended to predict sedimentyield.1.3 Metr
6、ic (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 series of options and does not recommend a specif
7、iccourse 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 standard of care by which the adequacy of a gi
8、venprofessional 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 purport to address all of thesafety concerns,
9、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:2D 653 Terminology Relating to Soil, Rock, an
10、d ContainedFluids3. Terminology3.1 While most of the terms used in this guide conform toTerminology D 653, some are unique to this guide. These termsrelate to soil erosion and are used frequently in the methodsoutlined in this guide.NOTE 1The Natural Resources Conservation Service was formerlythe So
11、il 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 inthe wearing away or the progressive lowering of the earthssurface by weathering, mass wasting, or transportation; also thecombined dest
12、ructive effects of such processes.3.2.3 erodibilitythe degree to which a soil is susceptibleto erode. Some soils erode more readily than others due to thesoil properties.3.2.4 erosionthe wearing away of soil and rock by weath-ering, mass wasting, and the action of streams, glaciers, waves,wind, and
13、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 balancefor the growth of specified plants
14、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 suitable materi-als that aid in soil stabilization and soil moisture conservation,thus providing micro-climatic conditions suitable for germ
15、ina-tion and growth.3.2.8 pasturean area devoted to the production of forage,introduced or native, and harvested by grazing.1This 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 e
16、dition approved Sept. 1, 2007. Published October 2007. Originallyapproved in 2001. Last previous edition approved in 2001 as D 6629 01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume inf
17、ormation, refer to the standards Document Summary page onthe ASTM website.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.3.2.9 rilla small, intermittent water course with steepsides, usually only a few inches deep and, therefore, no
18、obstacle 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 movement of soil particles from their pre-erosionlocation.3.2.12 tillagethe
19、 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 provides guidance in selecting methods forestimating soil loss by rill and
20、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, and levels ofcomplexity. The users of this guide should use the descrip
21、tionsof 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/unit area/unit time) from rainfall and snow melt forsite-specific factors
22、 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 erosion. However, theoutputs of these methods may be important input into
23、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 watershed and lake processes for water quality manage-ment decisions, Journal o
24、f Environmental Quality, July/September 1990, Volume 19 (3), p. 421-427. Young, R.A., C.A. Onstad, D.D. Bosch, and W.P. Ander-son, AGNPS: a nonpoint source pollution model for evaluatingagricultural watersheds, Journal of Soil and Water Conserva-tion, May/April 1989, Volume 44(2), p. 168-173.Spatial
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