نتایج جستجو برای: soil zonation

تعداد نتایج: 182369  

2013
Sara Branco Thomas D. Bruns Ian Singleton

Biological communities are often structured by environmental factors even at small spatial scales. Fungi are no exception, though the patterns and mechanisms underlying their community structure are usually unknown. Previous work documented zonation in fungi under tree canopies primarily through their fruiting patterns. Here we investigate the existence of zonation patterns in fungal communitie...

Journal: :Anais da Academia Brasileira de Ciencias 2017
Rodrigo I Cerri Fábio A G V Reis Marcelo F Gramani Lucilia C Giordano José Eduardo Zaine

This paper presents a new approach of landslides zonation hazard studies, based on an integrated study of structural data along with geomorphological and external factors, in a hilly regions of Brazil, covered by a tropical humid rain-forest, called Serra do Mar. The Serra do Mar consists of a hilly region along the east coast of Brazil, with high slopes and many geological structures in a gnei...

2014
José Álvarez-Rogel María Nazaret González-Alcaraz

This study summarizes the changes (1991-2004) in plant distribution and cover in relation to soil factors in a salt marsh impacted by surplus of water from agricultural origin. An elevation of the groundwater level was observed, which led to a homogenization in the saline gradient. The changes were reflected in a shift in vegetation distribution which included the disappearance of most of the z...

2013
Mahmood Ahmad Qaiser Iqbal Fayaz Ahmad Khan

This research paper presents a compendium of the geotechnical sub-soil data profiling and zoning of the major urban settlements of Peshawar using Geographic Information System. Significant geotechnical properties of the under study area soils i.e., Zone 5 & 6 in Peshawar were assessed through one hundred and three different standard penetration test reports up to the depth of 1 m and 3 m. The q...

2007
Margaret J. Eppstein David E. Dougherty

We extend our methodology for three-dimensional parameter structure and value estimation and apply it to a Vermont test site. Ground-penetrating radar (GPR) cross-well travel times are inverted for estimation of heterogeneous GPR soil velocities before and after a controlled release of salt water in the unsaturated zone. The method, which is based on an approximation of the extended Kalman filt...

Journal: :جغرافیا و توسعه ناحیه ای 0
جوکار سرهنگی جوکار سرهنگی امیر احمدی امیر احمدی سلمیان سلمیان

it is very important to recognize the areas with high potential risk of landslide in order to resist that. in a case study, thirty three landslides have been observed in safarood watershed. the purpose of this study is to recognize factors and zonation of potential areas for landslide. this paper covers specific factors including lithology, fault, height, slope, direction, rainfall, soil, veget...

Journal: :Visnyk of the Lviv University. Series Geography 2018

2012
Changbai Mountain Congcong Shen Jinbo Xiong Huayong Zhang Youzhi Feng Xiangui Lin Xinyu Li Wenju Liang Haiyan Chu

The elevational patterns of diversity for plants and animals have been well established over the past century. However, it is unclear whether there is a general elevational distribution pattern for microbes. Changbai Mountain is one of few well conserved natural ecosystems, where the vertical distribution of vegetation is known to mirror the vegetation horizontal zonation from temperate to frig...

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