{"id":5459,"date":"2019-05-07T12:00:59","date_gmt":"2019-05-07T10:00:59","guid":{"rendered":"https:\/\/www.adssc.org\/en\/?p=5459"},"modified":"2020-07-13T15:07:47","modified_gmt":"2020-07-13T13:07:47","slug":"tillage-effect-on-hydrophobicity-and-hydrological-properties-of-oil-contaminated-sediments-in-a-hyper-arid-region","status":"publish","type":"post","link":"https:\/\/www.adssc.org\/en\/tillage-effect-on-hydrophobicity-and-hydrological-properties-of-oil-contaminated-sediments-in-a-hyper-arid-region\/","title":{"rendered":"Tillage effect on hydrophobicity and hydrological properties of oil-contaminated sediments in a hyper-arid region"},"content":{"rendered":"

By<\/u>: Stavi, I.<\/a>, Rosenzweig, R.<\/p>\n

Published in<\/u>: Arid Land Research and Management<\/em> (2020) 34, 26\u201335<\/p>\n

https:\/\/www.tandfonline.com\/doi\/abs\/10.1080\/15324982.2019.1599468?journalCode=uasr20<\/a><\/p>\n

Correspondence: istavi@adssc.org<\/a><\/p>\n

Abstract <\/strong><\/p>\n

A crude oil spill in 2014 led to the contamination of an extensive area in the Evrona Nature Reserve at the hyper-arid Arava Valley of Israel. In 2015, as a part of the restoration efforts, the oil-polluted braided ephemeral stream channels underwent a single session of tillage, to a depth of 10cm. The rationale of this treatment was to break the hard, impermeable crust of the residual oil, aiming to reduce soil hardness and water repellency, and to improve the hydrological properties of the soil. In 2017, a study was conducted to assess the effect of chiseling tillage on the soil\u2019s hydrophobicity, mechanical strength, and infiltration capacity. Water drop penetration time, critical surface tension, penetration resistance, and near saturated hydraulic conductivity were measured on-site, at depths of 0, 5, and 10cm in contaminated-tilled, contaminated-non-tilled, and clean plots. We found that at the ground surface, tillage had a slight and non-significantly positive effect on the nearly-saturated hydraulic conductivity and a negative effect on the penetration resistance, while no improvement was recorded for the other properties. Further, some of these properties were inferior in the contaminated tilled sediments compared to those in the contaminated-non-tilled sediments, an effect that could be attributed to the: (1) tillage induced inversion of the most polluted surface layer into the subsoil, (2) absence of a clayey sublayer, and (3) limited oil degradation due to the extremely dry conditions. Therefore, the results indicate that tillage is not an effective practice for restoring oil-polluted soils and sediments in hyper-arid regions.\u00a0<\/em><\/p>\n

\"\" Stavi & Rosenzweig 2020 ALRM_abstract<\/a><\/p>\n

\"\"
Fig. 1. Treatment effect on the soil’s water drop penetration time (WDPT) and critical surface tension (CST) throughout the studied soil profile. Within each of these variables, different letters indicate a difference at the 0.05 probability level according to Tukey\u2019s HSD.<\/figcaption><\/figure>\n
\"\"
Fig. 2. Treatment effect on the soil’s volumetric water content (VWC), nearly-saturated hydraulic conductivity (Kf), and penetration resistance (PR) throughout the studied soil profile. Within each of these variables, different letters indicate a difference at the 0.05 probability level according to Tukey\u2019s HSD.<\/figcaption><\/figure>\n

 <\/p>\n

 <\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

By: Stavi, I., Rosenzweig, R. Published in: Arid Land Research and Management (2020) 34, 26\u201335 https:\/\/www.tandfonline.com\/doi\/abs\/10.1080\/15324982.2019.1599468?journalCode=uasr20 Correspondence: istavi@adssc.org Abstract A crude oil spill in 2014 led to the contamination of an extensive area in the Evrona Nature Reserve at the hyper-arid Arava Valley of Israel. In 2015, as a part of the restoration efforts, the […]<\/p>\n","protected":false},"author":1,"featured_media":5466,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[217],"tags":[],"class_list":{"0":"post-5459","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-new-article"},"jetpack_featured_media_url":"https:\/\/www.adssc.org\/en\/wp-content\/uploads\/2020\/04\/Fig.-1.-WDPT-CST.png","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.adssc.org\/en\/wp-json\/wp\/v2\/posts\/5459","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.adssc.org\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.adssc.org\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.adssc.org\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.adssc.org\/en\/wp-json\/wp\/v2\/comments?post=5459"}],"version-history":[{"count":6,"href":"https:\/\/www.adssc.org\/en\/wp-json\/wp\/v2\/posts\/5459\/revisions"}],"predecessor-version":[{"id":5862,"href":"https:\/\/www.adssc.org\/en\/wp-json\/wp\/v2\/posts\/5459\/revisions\/5862"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.adssc.org\/en\/wp-json\/wp\/v2\/media\/5466"}],"wp:attachment":[{"href":"https:\/\/www.adssc.org\/en\/wp-json\/wp\/v2\/media?parent=5459"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.adssc.org\/en\/wp-json\/wp\/v2\/categories?post=5459"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.adssc.org\/en\/wp-json\/wp\/v2\/tags?post=5459"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}