Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Eugene R. Kottwitz"'
Autor:
John E. Gilley, Eugene R. Kottwitz
Publikováno v:
Transactions of the ASAE. 38:539-544
Several types of hydraulic resistance factors may be present on upland agricultural areas. It is not known whether roughness contributions from individual elements are additive or if interactions between resistance factors may occur. In this study, D
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0b1db56e74be2d751e40ae55d010b7c
https://doi.org/10.13031/2013.27863
https://doi.org/10.13031/2013.27863
Autor:
John E. Gilley, Eugene R. Kottwitz
Publikováno v:
Applied Engineering in Agriculture. 12:39-43
Surface microrelief is frequently characterized using random roughness factors (RRF) defined by Allmaras et al. (1966). Random roughness factors are usually measured using a pin roughness meter or laser. Saleh (1993) recently proposed the chain metho
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0878e0f17e1a19672cc40a264a628a4
https://doi.org/10.13031/2013.25437
https://doi.org/10.13031/2013.25437
Publikováno v:
Journal of Irrigation and Drainage Engineering. 120:591-606
Hydraulic conditions required to initiate movement of unanchored residue materials are identified in the present study. Selected amounts of corn, cotton, pine needles, sorghum, soybean, sunflower, and wheat residue are placed in a flume on a sand sur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aa5054d1815680a7f1e9560357b30ae2
https://doi.org/10.1061/(asce)0733-9437(1994)120:3(591)
https://doi.org/10.1061/(asce)0733-9437(1994)120:3(591)
Autor:
Eugene R. Kottwitz, John E. Gilley
Publikováno v:
Journal of Irrigation and Drainage Engineering. 120:440-449
Small ponds created by crop residue serve to store water on upland areas. The present study is conducted to identify the maximum surface storage provided by crop residue. Equations for estimating surface storage are derived assuming that residue elem
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b16df505458ce2095d9b23439328241f
https://doi.org/10.1061/(asce)0733-9437(1994)120:2(440)
https://doi.org/10.1061/(asce)0733-9437(1994)120:2(440)
Autor:
John E. Gilley, Eugene R. Kottwitz
Publikováno v:
Transactions of the ASAE. 37:467-471
Total hydraulic resistance on an upland agricultural site may be influenced by several factors including standing vegetation. In this laboratory study, Darcy-Weisbach roughness coefficients were measured for corn, cotton, sorghum, soybeans, sunflower
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::00b78bc17dd1b04a58b24b76d39e6553
https://doi.org/10.13031/2013.28098
https://doi.org/10.13031/2013.28098
Autor:
John E. Gilley, Eugene R. Kottwitz
Publikováno v:
Journal of Irrigation and Drainage Engineering. 118:619-630
Conservation tillage systems help to maintain residue materials from the previous crop on the soil surface. The potential for serious erosion may exist if crop residues are removed by overland flow. This study is conducted to identify the hydraulic c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::41b088c0279004ca2866a410d0573722
https://doi.org/10.1061/(asce)0733-9437(1992)118:4(619)
https://doi.org/10.1061/(asce)0733-9437(1992)118:4(619)
Publikováno v:
Journal of Irrigation and Drainage Engineering. 118:104-112
A laboratory study is conducted to measure Darcy-Weisbach roughness coefficients for selected gravel and cobble materials. Varying rates of flow are introduced into a flume in which a given size class of gravel or cobble material is securely attached
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b002fe9dec2f9154d54553e51e4cb1de
https://doi.org/10.1061/(asce)0733-9437(1992)118:1(104)
https://doi.org/10.1061/(asce)0733-9437(1992)118:1(104)
Publikováno v:
Journal of Irrigation and Drainage Engineering. 117:503-514
Analysis of surface runoff on upland areas requires identification of roughness coefficients. A laboratory study is conducted to measure DarcyWeisbach and Manning roughness coefficients for corn, c...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6dee5d9ccced3a9669059dd0cbae96e7
https://doi.org/10.1061/(asce)0733-9437(1991)117:4(503)
https://doi.org/10.1061/(asce)0733-9437(1991)117:4(503)
Publikováno v:
Transactions of the ASAE. 33:1900-1906
Rill density and rill flow rates were determined during rainfall simulation tests conducted at 11 sites located throughout the eastern United States. A mean rill density of 1.0 rills/m was found for the study locations. From measurements of the relat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c38af6742ef5ddbf037f7393dc747f1b
https://doi.org/10.13031/2013.31556
https://doi.org/10.13031/2013.31556
Publikováno v:
Applied Engineering in Agriculture. 6:35-38
Information concerning hydraulic parameters on upland areas could be greatly expanded through the use of tracing techniques. If bromide is used as a tracer, adsorption of bromide onto sediment may be of concern. Therefore, a laboratory study was cond
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2466e136e130d5b5465a2a8f4b74058b
https://doi.org/10.13031/2013.26341
https://doi.org/10.13031/2013.26341