Technical Notes: A Comparison of Two Saturated Hydraulic Conductivity Measuring Techniques in Relation to Drain Installation Methods

dc.contributor.author Mirjat, Mohammad
dc.contributor.author Kanwar, Rameshwar
dc.contributor.author Kanwar, Rameshwar
dc.contributor.department Agricultural and Biosystems Engineering
dc.date 2018-02-17T06:11:52.000
dc.date.accessioned 2020-06-29T22:41:58Z
dc.date.available 2020-06-29T22:41:58Z
dc.date.copyright Sat Jan 01 00:00:00 UTC 1994
dc.date.issued 1994
dc.description.abstract <p>Saturated hydraulic conductivity (Ks) is an important parameter influencing subsurface drainage design and performance, and Ks can be affected by subsurface drain installation methods. Ks was measured at a field site at Nashua, Iowa, with 1.2-m (4-ft) deep drain lines installed with a trenchless plow and with a chain trencher at four depths [0 to 150, 150 to 450, 450 to 750, 750 to 1000 mm (0 to 6, 6 to 18, 18 to 30, 30 to 40 in.)] using the Guelph permeameter (in situ technique) and the constant head permeameter method (laboratory technique) on undisturbed soil cores which were removed from the field site. Ks values were 10 to 130 times greater for the constant head permeameter compared to the Guelph permeameter method and were significantly different at all depths for the two measurement methods. The laboratory technique yielded greater standard deviation values for all depths, whereas the coefficient of variation values were greater for the in situ technique. Drain line installation methods did not significantly affect Ks at the 0 to 150 and 150 to 450 mm (0 to 6 and 6 to 18 in.) depths; however, at the 450 to 750 and 750 to 1000 mm (18 to 30 and 30 to 40 in.) depths, the trencher installation method had Ks values two to three times greater than the trenchless installation method and these differences were significantly different. Subsurface drain line installation method can affect the Ks values particularly near the drain line depths; however, these affects did not affect drainage system performance 10 years after installation.</p>
dc.description.comments <p>This article was published in Applied Engineering in Agriculture. 10(1): 65-68. doi:<a href="http://dx.doi.org/10.13031/2013.25829" target="_blank">10.13031/2013.25829</a>. Posted with permission.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/abe_eng_pubs/700/
dc.identifier.articleid 1976
dc.identifier.contextkey 7849600
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath abe_eng_pubs/700
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/1495
dc.language.iso en
dc.source.bitstream archive/lib.dr.iastate.edu/abe_eng_pubs/700/1994_Mirjat_ComparisonTwo.pdf|||Sat Jan 15 01:40:43 UTC 2022
dc.source.uri 10.13031/2013.25829
dc.subject.disciplines Agriculture
dc.subject.disciplines Bioresource and Agricultural Engineering
dc.subject.disciplines Hydrology
dc.subject.disciplines Water Resource Management
dc.subject.keywords Hydraulic conductivity
dc.subject.keywords Permeameters
dc.subject.keywords Drain installation methods
dc.title Technical Notes: A Comparison of Two Saturated Hydraulic Conductivity Measuring Techniques in Relation to Drain Installation Methods
dc.type article
dc.type.genre article
dspace.entity.type Publication
relation.isAuthorOfPublication 5210e67e-b8da-4e17-be3f-843a09381196
relation.isOrgUnitOfPublication 8eb24241-0d92-4baf-ae75-08f716d30801
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