[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-51693-en":3,"doc-seo-51693-105":29,"detail-sidebar-cat-0-en-105":91},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":20,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":13,"seo_description":14,"update_tm":27,"read_time":28},51693,1099513958607,"Jiven","https://ap-avatar.wpscdn.com/avatar/100002390cf8733938c?x-image-process=image/resize,m_fixed,w_180,h_180&k=1778829742770036399",8,"Research & Report","Soil Water Dynamics Under Different Forest Vegetation Cover Implications for Hillslope Stability","Vegetation influences soil water balance through canopy interception and evapotranspiration, yet its hydrological contribution to soil dynamics and hillslope stability remains insufficiently quantified. Soil water dynamics were monitored on three adjacent hillslopes with deciduous tree, coniferous tree, and grass cover over nine months (Dec 2014–Sep 2015). Soil moisture observations were converted to soil matric suction (SMS) to assess stability effects.","Title of the work: Soil water dynamics under different forest vegetation cover:  \nImplications for hillslope stability  \nAuthors: Elyas Hayati* 1,3 , Ehsan Abdi 1 , Mohsen Mohseni Saravi2 , John L. Nieber3 ,  \nBaris Majnounian 1 , Giovanni B. Chirico4 , Bruce Wilson3 , and Moharramali Nazarirad 1  \n1- Department of Forestry and Forest Economics, University of Tehran, Tehran,  \n[Iran. ](Iran.  hayati_fe@ut.ac.ir)[ hayati_fe@ut.ac.ir](Iran.  hayati_fe@ut.ac.ir); [abdie@ut.ac.ir](abdie@ut.ac.ir) ; [bmajnoni@ut.ac.ir](bmajnoni@ut.ac.ir) ;  \n[nazarirad71@ut.ac.ir](nazarirad71@ut.ac.ir)  \n2- Department of Range and Watershed Management, University of Tehran,  \nTehran, [Iran. ](Iran. msaravi@ut.ac.ir)[msaravi@ut.ac.ir](Iran. msaravi@ut.ac.ir)  \n3- Department of Bioproducts and Biosystems Engineering, University of  \nMinnesota, St. Paul, MN, 55108, [USA. ](USA. hayat013@umn.edu)[hayat013@umn.edu](USA. hayat013@umn.edu); [nieber@umn.edu](nieber@umn.edu) ;  \nwi[lson@umn.edu](lson@umn.edu)  \n4- Department of Agriculture, Division of Agricultural, Forest and Biosystems  \nEngineering, University of Napoli Federico II, 100-80055 Portici (NA) Italy.  \n[gchirico@unina.it](gchirico@unina.it)  \n*Corresponding author: Elyas Hayati,  \n- PhD candidate at Department of Forestry and Forest Economics, University of Tehran, 3158777871, Karaj, Iran. E-mail: [hayati_fe@ut.ac.ir](hayati_fe@ut.ac.ir)  \n-Visiting research scholar at Department of Bioproducts and Biosystems Engineering, University of Minnesota, St. Paul, MN, 55108, USA. E-mail: [hayat013@umn.edu](hayat013@umn.edu)  \nAbstract  \nThough it is well-known that vegetation affects the water balance of soils through  \ncanopy interception and evapotranspiration, its hydrological contribution to soil  \nhydrology and stability is yet to be fully quantified. To improve understanding of this  \nhydrological process , soil water dynamics have been monitored at three adjacent  \nhillslopes with different vegetation covers (deciduous tree cover, coniferous tree cover,  \nand grass cover), for nine months from December 2014 to September 2015. The  \nmonitored soil moisture values were translated into soil matric suction (SMS) values  \nto facilitate the analysis of hillslope stability. Our observations showed significant  \nseasonal variations in SMS for each vegetation cover condition. However, a significant  \ndifference between different vegetation covers was only evident during the winter  \nseason where the mean SMS under coniferous tree cover (83 .6 kPa) was significantly  \ngreater than that under grass cover (41 kPa) . The hydrological reinforcing contribution  \ndue to matric suction was highest for the hillslope with coniferous tree cover, while the  \nhillslope with deciduous tree cover was second and the hillslope with grass cover was  \nthird. The greatest contributions for all cover types were during the summer season.  \nDuring the winter season , the wettest period of the monitoring study, the additional  \nhydrological reinforcing contributions provided by the deciduous tree cover (1 .5 to 6.5  \nkPa) or the grass cover (0 .9 to 5.4 kPa) were insufficient to avoid potential slope failure  \nconditions. However, the additional hydrological reinforcing contribution from the  \nconiferous tree cover (5 .8 to 10.4 kPa) was sufficient to provide potentially stable  \nhillslope conditions during the winter season. Our study clearly suggests that during  \nthe winter season the hydrological effects from both deciduous tree and grass covers  \nare insufficient to promote slope stability, while the hydrological reinforcing effects from  \nthe coniferous tree cover are sufficient even during the winter season.  \nKeywords: Hillslope hydrology, Soil water content, Soil suction , Apparent soil  \ncohesion, Hyrcanian forest.  \nIntroduction  \nWhile the occurrences of hillslope failures are attributed to many factors (Lu and Godt,  \n2013) , rainfall and wet antecedent soil moisture conditions have been recognized to  \nbe the mo","cbCaiq8sZjGeQtrJ","https://ap.wps.com/l/cbCaiq8sZjGeQtrJ","pdf",1381623,1,54,"English","en",105,"# Abstract\n# Introduction","[{\"question\":\"How were soil water dynamics linked to hillslope stability in this study?\",\"answer\":\"Soil moisture measurements were translated into soil matric suction (SMS) values to analyze hillslope stability contributions from different vegetation covers.\"},{\"question\":\"Which vegetation cover showed the strongest hydrological reinforcing effect during winter?\",\"answer\":\"Coniferous tree cover produced the highest hydrological reinforcing contribution due to matric suction during winter, whereas deciduous and grass covers were insufficient to prevent potential slope failure conditions.\"},{\"question\":\"What seasonal pattern did the study find for soil matric suction (SMS)?\",\"answer\":\"Significant seasonal variations in SMS occurred for each vegetation cover. The greatest contributions across cover types occurred during summer, while winter outcomes differed mainly between coniferous and grass/diciduous covers.\"}]",1783631280,136,{"code":4,"msg":30,"data":31},"ok",{"site_id":24,"language":23,"slug":32,"title":13,"keywords":33,"description":14,"schema_data":34,"social_meta":86,"head_meta":88,"extra_data":90,"updated_unix":27},"soil-water-dynamics-under-different-forest-vegetation-cover-implications-for-hillslope-stability","",{"@graph":35,"@context":85},[36,53,68],{"@type":37,"itemListElement":38},"BreadcrumbList",[39,43,47,50],{"item":40,"name":41,"@type":42,"position":20},"https://docshare.wps.com","Home","ListItem",{"item":44,"name":45,"@type":42,"position":46},"https://docshare.wps.com/document/","Document",2,{"item":48,"name":12,"@type":42,"position":49},"https://docshare.wps.com/document/research-report/",3,{"item":51,"name":13,"@type":42,"position":52},"https://docshare.wps.com/document/soil-water-dynamics-under-different-forest-vegetation-cover-implications-for-hillslope-stability/51693/",4,{"url":51,"name":13,"@type":54,"author":55,"headline":13,"publisher":57,"fileFormat":60,"inLanguage":23,"description":14,"dateModified":61,"datePublished":62,"encodingFormat":60,"isAccessibleForFree":63,"interactionStatistic":64},"DigitalDocument",{"name":9,"@type":56},"Person",{"url":40,"name":58,"@type":59},"DocShare","Organization","application/pdf","2026-07-14","2026-07-09",true,{"@type":65,"interactionType":66,"userInteractionCount":20},"InteractionCounter",{"@type":67},"ViewAction",{"@type":69,"mainEntity":70},"FAQPage",[71,77,81],{"name":72,"@type":73,"acceptedAnswer":74},"How were soil water dynamics linked to hillslope stability in this study?","Question",{"text":75,"@type":76},"Soil moisture measurements were translated into soil matric suction (SMS) values to analyze hillslope stability contributions from different vegetation covers.","Answer",{"name":78,"@type":73,"acceptedAnswer":79},"Which vegetation cover showed the strongest hydrological reinforcing effect during winter?",{"text":80,"@type":76},"Coniferous tree cover produced the highest hydrological reinforcing contribution due to matric suction during winter, whereas deciduous and grass covers were insufficient to prevent potential slope failure conditions.",{"name":82,"@type":73,"acceptedAnswer":83},"What seasonal pattern did the study find for soil matric suction (SMS)?",{"text":84,"@type":76},"Significant seasonal variations in SMS occurred for each vegetation cover. The greatest contributions across cover types occurred during summer, while winter outcomes differed mainly between coniferous and grass/diciduous covers.","https://schema.org",{"og:url":51,"og:type":87,"og:title":13,"og:site_name":58,"og:description":14},"article",{"robots":89,"canonical":51},"index,follow",{"doc_id":7,"site_id":24},{"code":4,"msg":5,"data":92},[93,97,101,105,110,115,120,123,128,131,135],{"id":20,"doc_module":4,"doc_module_name":45,"category_name":94,"show_sort_weight":95,"slug":96},"Story & Novel",90,"story-novel",{"id":46,"doc_module":4,"doc_module_name":45,"category_name":98,"show_sort_weight":99,"slug":100},"Literature",80,"literature",{"id":52,"doc_module":4,"doc_module_name":45,"category_name":102,"show_sort_weight":103,"slug":104},"Exam",70,"exam",{"id":106,"doc_module":4,"doc_module_name":45,"category_name":107,"show_sort_weight":108,"slug":109},5,"Comic",60,"comic",{"id":111,"doc_module":4,"doc_module_name":45,"category_name":112,"show_sort_weight":113,"slug":114},6,"Technology",50,"technology",{"id":116,"doc_module":4,"doc_module_name":45,"category_name":117,"show_sort_weight":118,"slug":119},7,"Healthcare",40,"healthcare",{"id":11,"doc_module":4,"doc_module_name":45,"category_name":12,"show_sort_weight":121,"slug":122},30,"research-report",{"id":124,"doc_module":4,"doc_module_name":45,"category_name":125,"show_sort_weight":126,"slug":127},9,"Religion & Spirituality",20,"religion-spirituality",{"id":126,"doc_module":4,"doc_module_name":45,"category_name":129,"show_sort_weight":126,"slug":130},"World Cup","world-cup",{"id":132,"doc_module":4,"doc_module_name":45,"category_name":133,"show_sort_weight":132,"slug":134},10,"Lifestyle","lifestyle",{"id":136,"doc_module":4,"doc_module_name":45,"category_name":137,"show_sort_weight":106,"slug":138},19,"General","general"]