نتایج جستجو برای: physiographic factors

تعداد نتایج: 1078537  

2012
Karen R. Burow Bryant C. Jurgens Kenneth Belitz Neil M. Dubrovsky

A regional assessment of multi-decadal changes in nitrate concentrations was done using historical data and a spatially stratified non-biased approach. Data were stratified into physiographic subregions on the basis of geomorphology and soils data to represent zones of historical recharge and discharge patterns in the basin. Data were also stratified by depth to represent a shallow zone general...

In order to manage the forests and optimal and sustainable utilization of the forest, it seems necessary to know the information on the volume of the residual stand. In this study, a systematic randomized inventory was carried out in 186 circular 10-acre plots in the educational and research forest of Darabkola, Sari, Golestan, Iran and the volume of each plot was obtained. In the next step, th...

Journal: :آب و خاک 0
بهار صلواتی سید حمیدرضا صادقی عبدالرسول تلوری

abstract flood is among phenomena which result considerable damages to resources and is a serious issue among hydrologists. the proper estimation of runoff is necessary for designating appropriate approaches for its control or optimal management. various problems have been reported in application of empirical models. the regional analysis of runoff with different return periods by applying wate...

A. Parsakhoo M.A. Eshaghi Sh. Shataee Joybari

Helicopter landing sites in proximity to the forest fire-risk zones are necessary for the delivery of supplies and fire emergency response teams. In this paper, we initially prepared forest fire risk map using Random Forest algorithm by overlaying the effective factors on fire occurring including vegetation types, physiographic, climatic and human factors. Then, three variants of natural candid...

Determination of factors affecting on species distribution and diversity, especially in desert areas is the most important factor in rangeland ecosystems management for encountering biological stress. In order to evaluate the effect of physiographic factors on plant biodiversity in natural ecosystems of Kakhk Gonabad, this research was conducted in spring 2014. First, by overlaying four maps of...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی 1394

abstract previous studies on willingness to communicate (wtc) have shown the influence of many individual or situational factors on students’ tendency to engage in classroom communication, in which wtc has been viewed either at the trait-level or situational level. however, due to the complexity of the notion of willingness to communicate, the present study suggests that these two strands are ...

2005
W. - A. Flügel

The Gera basin is located in the Thuringian middle mountain range area of Germany. Physiographic and climatic factors, such as topography, landuse and soils as well as precipitation varying strongly. They are resulting in a highly complex of variable water and nutrients turnover processes. One of the main water quality problems occuring in the Gera basin is related to nutrients. Therefore the m...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده فنی مهندسی 1388

the purpose of this study is identifying effective factors which make customers shop online in iran and investigating the importance of discovered factors in online customers’ decision. in the identifying phase, to discover the factors affecting online shopping behavior of customers in iran, the derived reference model summarizing antecedents of online shopping proposed by change et al. was us...

Ecological condition including physiographic factors have impact bon plant species diversity. There for it is necessary to investigate at the ecological condition in other to achieve sustainable development and natural ecosystem conservation. The present study aim is investigate the effect of physiographic factors (altitude and geographic directions) on the biological diversity of plant species...

Journal: :Geomorphology 2022

Tahiti Nui is a quiescent tropical volcanic island (French Polynesia) characterized by an intense erosion (up to 0.25 km3·kyr−1 over the last 1 Ma) that resulted in 27 main drainage basins radially distributed around central depression. Those are different rates (from 0.07 24.6 10−2 km3·kyr−1), ages 469 892 ka), micro-climate set-ups and other landform factors. In this study, we assess, terms o...

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