نتایج جستجو برای: bare land

تعداد نتایج: 131593  

Journal: :Remote Sensing 2010
Yingxin Gu Bruce K. Wylie

This study identifies areas with ecosystem performance anomalies (EPA) within the Upper Colorado River Basin (UCRB) during 2005–2007 using satellite observations, climate data, and ecosystem models. The final EPA maps with 250-m spatial resolution were categorized as normal performance, underperformance, and overperformance (observed performance relative to weather-based predictions) at the 90%...

2003
Dag Lohmann Eric F. Wood

Present-day land surface schemes used in weather prediction and climate models include parameterizations of physical processes whose complex nonlinear interactions can lead to models of unknown spatial and temporal characteristics. This paper describes the timescales of the evapotranspiration response of 16 land surface schemes which participated in the Project for Intercomparison of Land-surfa...

2016
Christopher Conrad Sarah Schönbrodt-Stitt Fabian Löw Denis Sorokin Heiko Paeth

Temporal NDVI signatures of the following land cover types in the Aral Sea Basin (ASB) were analyzed in MODIS data 2000–2012: Wetlands, bare land, water surfaces, natural vegetation and rainfed agriculture (in mountainous regions), low vegetation, rice cropping systems. Only the last class refers to cropland. All other classes were targeted to separate non-cropland or rainfed agriculture from t...

Journal: :محیط شناسی 0
مریم حسین خواه دانشکده منابع طبیعی دانشگاه ارومیه گروه آموزشی مرتع و آبخیزداری مهدی عرفانیان عضو هیات علمی رسمی دانشکده منابع طبیعی دانشگاه ارومیه گروه آموزشی مرتع و آبخیزداری احمد علیجانپور دانشکده منابع طبیعی دانشگاه ارومیه گروه آموزشی جنگلداری

extended abstractintroductionin recent years, several studies around the world have shown that land use has a strong impact on water quality, and significant correlations exist between water quality parameters and land use types. generally land use types have adverse impacts on water quality, so positive relationships exist between percentages of these land use types and concentrations of water ...

2004
Y. Tian R. E. Dickinson L. Zhou R. B. Myneni M. Friedl C. B. Schaaf M. Carroll F. Gao

[1] This paper compares seasonal and spatial variations of MODIS albedos with those from the Community Land Model (CLM2). MODIS surface albedo data from September 2000 to August 2002 were used to investigate the model biases. To assess how inaccuracies in the land surface data used in CLM2 contribute to the model albedo biases, we created a new land surface dataset using the highest quality rep...

2009
R Mathieu K Wessels G Asner D. Knapp J. van Aardt M Cho B. Erasmus I. Smit

Land degradation is one of the most significant environmental problems in the semi-arid and arid savannas of Southern Africa. Degradation affects vegetation structure, cover and patchiness and this result in the loss of vegetation resources used by rural populations (grazing, fuel wood, and other non-timber forest products) and wildlife. Land degradation processes are influenced by rainfall, la...

Quantifying land use change dynamics is critical in tackling environmental and socio-economic challenges such as climate change in recent years. This study takes Siahkal County in Guilan Province as the research subject and analyzes the land use changes in two different years: 2000 and 2021, and predicts the change in 2031. We carried out land use change analysis using LANDSAT-7 ETM+ and LANDSA...

ژورنال: علوم آب و خاک 2016
امیدوار, ابراهیم, فلاح سورکی, مقدسه, کاویان, عطااله,

Prioritization of sub-watersheds is very important and necessary in order to implement soil and water conservation practices. This study has prioritized 13 sub-watersheds based on morphometric and land use characteristics using RS and GIS techniques in Haraz watershed to identify erosion-prone sub-watersheds. Morphometric characteristics including bifurcation ratio, drainage density, stream fre...

Journal: :Environmental microbiology 2017
Andrew L Neal Maike Rossmann Charles Brearley Elsy Akkari Cervin Guyomar Ian M Clark Elisa Allen Penny R Hirsch

Phosphorus cycling exerts significant influence upon soil fertility and productivity - processes largely controlled by microbial activity. We adopted phenotypic and metagenomic approaches to investigate phosphatase genes within soils. Microbial communities in bare fallowed soil showed a marked capacity to utilise phytate for growth compared with arable or grassland soil communities. Bare fallow...

Journal: :Indian journal of agricultural research 2022

Background: Land-use and land-cover (LULC) change is among the dynamic environmental ecological factors for monitoring facilitating developmental strategies to balance conservation conflict of resource uses. This study aimed analyze LULC changes that have occurred during 1988-2018 its prediction 2040-2060 periods. Methods: were analyzed using geographic information system Landsat predicted by C...

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