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| 1 | Soil fixation and erosion control by Haloxylon persicum roots in arid lands, Iran显示文摘Vegetation roots contribute to soil fixation and reinforcement, thus improving soil resistance against erosion. Generally, the amount of soil fixation presented by roots mainly depends on root density and tensile strength. In the present study, we conducted the research in order to further understand the biotechnical properties of Haloxylon persicum and also to quantify its role in increasing soil cohesion in arid lands of Iran. Ten H. persicum shrubs were randomly selected for root distribution and strength investigations, in which five samples were set on flat terrain and other five samples on a moderate slope terrain. The profile trench method was used to assess the root area ratio(RAR) as the index of root density and distribution. Two profiles were dug around each sample, up and downslope for sloped treatment and north and south sides for flat treatment. The results showed that RAR increased with increasing soil depth and significantly decreased in 40–50 cm layers of downhill(0.320%) and 50–60 cm for uphill(0.210%). The minimum values for the northward and southward profiles were 0.003% and 0.003%, respectively, while the maximum values were 0.260% and 0.040%, respectively. The relationship between the diameter of root samples and root tensile strength followed a negative power function, but tensile force increased with increasing root diameter following a positive power function. The pattern of increased cohesion changes in soil profile was relatively similar to RAR curves. The maximum increased cohesion due to the presence of roots in uphill and downhill sides were 0.470 and 1.400 kPa, respectively. In the flat treatment, the maximum increased cohesions were 0.570 and 0.610 kPa in northward and southward profiles, respectively. The analysis of variance showed that wind and slope induced stresses did not have any significant effect on the amount of increased cohesion of H. persicum. The findings served to develop knowledge about biotechnical properties of H. persicum root system that can assist in assessing the efficiency of afforestation and restoration measures for erosion control in arid lands. | Ehsan ABDI Hamid R SALEH Baris MAJNONIAN Azade DELJOUEI | 2019 | Journal of Arid Land2019，11，1： | 4 |
| 2 | Vortex-induced vibrations of flexible bridges显示文摘 | Ehsan F Scanlan R H | 1990 | Journal of Engineering Mechanics1990，116，： | 1 |
| 3 | Vortex-induced vibrations of flexible bridges 显示文摘 | Ehsan F Scanlan R H | 1990 | Journal of Engineering Mechanics1990，116，6： | 1 |
| 4 | Possibilistic evaluation of distributed generations impacts on distribution networks显示文摘 | Soroudi A Ehsan M Caire R | 2011 | IEEE Transactions on Power Systems2011，26，4： | 1 |
| 5 | Design recommendations for bond of GFRP rebar to concrete 显示文摘 | EHSAN M R SAADATMANESH H TAO S | 1996 | Journal of Structural Engineering1996，，2： | 1 |
| 6 | An adaptive approach to singular point detection in fingerprint images显示文摘 | Mohammad R R Ehsan P Shohreh K | 2004 | Int J Electron Commun(AEU)2004，58，： | 1 |
| 7 | Cosmetic Seaweeds of Pakistan显示文摘 | Muhammad A R Ehsan E V | 2012 | International Journal ofPhycology and Phycochemistry2012，8，2： | 1 |
| 8 | Wind-induced motions of deer isle bridge 显示文摘 | Kumarasena T Scanlan R H Ehsan F | 1991 | Journal of Structural Engineering ASCE1991，117，11： | 1 |
| 9 | Effect of porosity on response behavior of carbon black-PMMA conductive composite sensors toward organic vapors显示文摘 | Ehsan D Seyed R G Payam M A | 2009 | Olfaetion and electronic nose:proceedings of the 13th International Symposium on Olfaction and Electronic Nose2009，1137，： | 1 |
| 10 | Vortex-induced vibrations of flexible bridges显示文摘 | EHSAN F SCANLAN R H | 1990 | Journal of Engineering Mechanics1990，116，6： | 1 |
| 11 | Vortex-induced vibrations of flexible bridges 显示文摘 | Ehsan F Scanlan R H | 1990 | Journal of Engineering Mechanics ASCE1990，116，6： | 1 |
| 12 | Vortex-induced vibrations of flexible bridges 显示文摘 | Ehsan F Scanlan R H | 1990 | Journal of Engineering Mechan- ics1990，116，6： | 1 |
| 13 | Role of Core-shell Rub- ber Particle Cavitation Resistance on Toughenability of Epoxy Resins显示文摘 | Ehsan R Marl Morteza Ebrahimi | 2008 | Polym Eng Sci2008，48，： | 1 |
| 14 | Possibilistic evaluation of distributed generations impacts on distribution networks显示文摘 | SOROUDI A EHSAN M CAIRE R | 2011 | IEEE Transactions on Power Systems2011，26，4： | 1 |
| 15 | Vortex - Induced Vibrations of Flexible Bridges 显示文摘 | Fazl Ehsan R H Scanlan | 1990 | Journal of Engineering Mechanics1990，116，： | 1 |
| 16 | Design recommendations for bond of GFRP rebars to concrete 显示文摘 | EHSAN M R SAADATMANESH H TAO S | 1996 | Journal of Structural Engineering1996，，2： | 1 |
| 17 | Effect of microencapsulation and resistant starch on the probiotic survival and sensory properties of synbiotic ice cream显示文摘 | HOMAYOUN I A AZIZIA EHSAN I M R | 2008 | Food Chemstry2008，111，1： | 1 |
| 18 | Vortex-Induced Vibrations of flexible bridg- es 显示文摘 | Ehsan F Scanlan R H | 1990 | Journal of Engineering Mechanics1990，116，6： | 1 |
| 19 | Vortex-induced vibrations of flexible bridges显示文摘 | EHSAN F SCANLAN R H | 1990 | Journal of Engineering Mechan- ics1990，116，： | 1 |
| 20 | Vortex-induced vibrations of flexible bridges显示文摘 | Ehsan F Seanlan R H | 1990 | Journal of Engineering Mechanics1990，116，6： | 1 |
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