نتایج جستجو برای: topography slope

تعداد نتایج: 79301  

Journal: :Journal of Physics: Conference Series 2017

2015
Ting Zhou Bao-Ming Chen Gang Liu Fang-Fang Huang Jin-Gang Liu Wen-Bo Liao Ying-Yong Wang Si-Jie Ren Chun-Quan Chen Shao-Lin Peng

Diversity is mainly determined by climate and environment. In addition, topography is a complex factor, and the relationship between topography and biodiversity is still poorly understood. To understand the role of topography, i.e., altitude and slope, in biodiversity, we selected Jinggangshan Mountain (JGM), an area with unique topography, as the study area. We surveyed plant and animal specie...

ژورنال: علوم آب و خاک 2014
جوکار, لادن, زارع, مریم, صوفی, مجید, نجابت, مسعود,

Gully erosion and sedimentation have high priority in Fars Province due to the losses from destruction of lands, roads and civil structures. In the present study, in order to evaluate the threshold for the development and initiation of gully topography in Fars province, two regions were selected including Allamarvdasht, Lamerd and Fedagh, Larestan. 30 gullies were selected in each mentioned are...

2005
Scott A. Ashford Nicholas Sitar Nan Deng

A frequency-domain parametric study using generalized consistent transmitting boundaries has been performed to evaluate the significance of topographic effects on the seismic response of steep slopes. The results show that the peak amplification of motion at the crest of a slope occurs at a normalized frequency 1t/2 = 0.2, where H is the slope height and 2 is the wavelength of the motion. The i...

2001
DAVID R. MONTGOMERY

Digital elevation models of two “steady-state” mountain ranges, the Olympic Mountains (OM) and Oregon Coast Range (OCR), are used to examine relationships between slope distributions, the development of threshold hillslopes, and steady-state topography. Plots of drainage area versus slope for these mountain ranges exhibit substantial scatter that complicates comparison of range form to analytic...

2003

enough to be of much assistance in geologic mappmg. The Martinsburg shales which flank several of the Jacksonburg aress on the northwest are quite insoluble, and form hills that rise from 100 to 300 feet above the Jacksonburg level. In some parts of the county the break in slope at the base of the shale hills in&c&s clearly the contact between the Jacksonburg and Martinsburg formations. In othe...

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