نتایج جستجو برای: vegetation complexity

تعداد نتایج: 365840  

2007
Susan Buffler Craig Johnson John Nicholson

................................................................................................................................................... ii Preface...................................................................................................................................................... 1 Background ..............................................................................

Journal: :E3S web of conferences 2021

This article contains data on the change in NDVI (Normalized Difference Vegetation Index) over a 10 year period from 2009 to 2019 obtained for identification of terrestrial vegetation using satellite images high spatial resolution territory Novorossiysk agglomeration. The degree degradation within urban agglomeration and surrounding areas has shown complexity overall structure due finer gradati...

Determination of vegetation and soil interaction is necessary for sustainable use of rangeland ecosystem. Soil-vegetation interrelationships in galbanum (Ferula gummosa) habitats of Ataeeye and Shoorrud- Khorasan-e- Razavi Province, Iran were studied using multivariate analysis. The stratified- random system of sampling was employed to randomly collect vegetation and soil samples from 46 quadra...

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Gully erosion is one of the most significant erosion types. This type of erosion is one of the most important sources of sediment in different regions of the world. Gullies often have different dimensions and complex characteristics and these characteristics may affect the distribution of vegetation. Topographic characteristics of gullies provide complex ecosystem for vegetation establishment. ...

2010
A. Ono K. Kajiwara Y. Honda

For the analysis of vegetation areas using satellites, a variety of vegetation indexes such as NDVI and EVI have been developed. However, most indexes have weak response to grasping the type and quality (the growth state and situation) of vegetation. To grasp these vegetation characteristics, we have developed new vegetation indexes, i.e. shadow index (SI) and water stress trend (WST). We estim...

2012
Hoshin V. Gupta Martyn P. Clark Jasper A. Vrugt Gab Abramowitz Ming Ye

[1] The past decade has seen significant progress in characterizing uncertainty in environmental systems models, through statistical treatment of incomplete knowledge regarding parameters, model structure, and observational data. Attention has now turned to the issue of model structural adequacy (MSA, a term we prefer over model structure “error”). In reviewing philosophical perspectives from t...

2004
David Lusseau M.E.J. Newman

Techniques recently developed for the analysis of human social networks are applied to the social network of bottlenose dolphins living in Doubtful Sound, New Zealand. We identify communities and subcommunities within the dolphin population and present evidence that sexand age-related homophily play a role in the formation of clusters of preferred companionship. We also identify brokers who act...

Journal: :Remote Sensing 2011
Rim Amri Mehrez Zribi Zohra Lili-Chabaane Benoît Duchemin Claire Gruhier Abdelghani G. Chehbouni

The analysis of vegetation dynamics is essential in semi-arid regions, in particular because of the frequent occurrence of long periods of drought. In this paper, multi-temporal series of the Normalized Difference of Vegetation Index (NDVI), derived from SPOT-VEGETATION satellite data between September 1998 and June 2010, were used to analyze the vegetation dynamics over the semi-arid central r...

2007
Marilyn D. Walker Donald A. Walker Kaye R. Everett Susan K. Short MARILYN D. WALKER

The hypothesized presence of large regions of grass and forb-dominated "steppe tundra" across Alaska and Siberia during the Pleistocene glacial epochs has led to a search for modern analogs. Evidence is presented for the presence of steppe vegetation on south-facing slopes and summits of pingos within the central Arctic Coastal Plain of Alaska. Vegetation, floristics, soils, and climatic factor...

2016
Erwan Motte Mehrez Zribi Pascal Fanise Alejandro Egido José Darrozes Amen Al-Yaari Nicolas Baghdadi Frédéric Baup Sylvia Dayau Rémy Fieuzal Pierre-Louis Frison Dominique Guyon Jean-Pierre Wigneron

Global Navigation Satellite System-Reflectometry (GNSS-R) has emerged as a remote sensing tool, which is complementary to traditional monostatic radars, for the retrieval of geophysical parameters related to surface properties. In the present paper, we describe a new polarimetric GNSS-R system, referred to as the GLObal navigation satellite system Reflectometry Instrument (GLORI), dedicated to ...

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