نتایج جستجو برای: soil map

تعداد نتایج: 371954  

Journal: :Remote Sensing 2017
Matthew North Timothy S. Farewell Stephen H. Hallett Audrey Bertelle

Road and rail networks provide critical support for society, yet they can be degraded by seasonal soil movements. Currently, few transport network operators monitor small-scale soil movement, but understanding the conditions contributing to infrastructure failure can improve network resilience. Persistent Scatterers Interferometry (PSI) is a remote sensing technique offering the potential for n...

Ehsan Alvandi Esmaeil Silakhori Mahtab Forootan

Liquefaction is one of the most determinant factors in the collapse of transportation infrastructures. This is especially true for roads and railroads located on saturated, fine-sand substrates under seismic conditions. The damage and human casualties resulting from liquefaction highlight the importance of understanding and mapping this phenomenon. Soil liquefaction occurs as a natural hazard i...

Journal: :Journal of environmental quality 2001
M A Shirazi L Boersma P K Haggerty C B Johnson

Soils support ecosystem functions such as plant growth and water quality because of certain physical, chemical, and biological properties. These properties have been studied at different spatial scales, including point scales to satisfy basic research needs, and regional scales to satisfy monitoring needs. Recently, soil property data for the entire USA have become available in the State Soil G...

Extended abstract 1- Introduction      Land use includes all types of land uses to meet different human needs. In other words, land use refers to the type of human use of land, and this type of use is related to the value of the land and (its) natural characteristics. To understand and identify, land use changes using satellite data to provide a broad and integrated view of an area, reproduci...

حجتی, سید محمد, میرزایی زاده, وحید, نیک نژاد, مریم,

In order to map the forest canopy density Bivareh Ilam Landsat 8 satellite data of 22 July 2014 and FCD model was used. The FCD of four indicators of vegetation, soil, shade and the heat index by applying a suitable threshold was and the density of vegetation and forest canopy density map based on FCD in percent respectively. Forest density map obtained, according to the classes provided by the...

Journal: :journal of agricultural science and technology 2010
s. k. alavi panah r. goossens

to use remote sensing data effectively, one must understand the spectral characteristics of the particular features under investigations. to study the relationship between soil salinity and soil reflectance, four multispectral scanners (mss) and seven thematic mappers (tm bands) over the ardakan playa located on the central iranian desert margins were selected. in this study soil map, soil ...

2009
Chunling Tang Thomas C. Piechota

This research investigates the interannual variability of soil moisture as related to large-scale climate variability and also evaluates the spatial and temporal variability of modeled deep layer (40–140 cm) soil moisture in the Upper Colorado River Basin (UCRB). A three layers hydrological model VIC-3L (Variable Infiltration Capacity Model – 3 layers) was used to generate soil moisture in the ...

2008
Alfred E. Hartemink

Little effort has been made to link soil mapping and soil data density to a nation’s welfare. Soil map density in 31 European countries and 44 low and middle income countries is linked to Gross Domestic Product (GDP) per capita and the number of soil scientists per country. National coverage of exploratory soil maps (>1:250 000) is generally higher in the poorest countries and decreases with in...

2012
Jing-wei Jin Yue-fei Xu Hui-chun Ye Chong-yang Shen Yuan-fang Huang

The objective of this study was to explore the spatial variation of soil fertility quality and the influence factors of human land use and soil management practices on soil fertility quality in North China cities' urban fringe of Beijing using data for 2007 and grey relational analysis (GRA) and geographic information systems (GIS). Soil total nitrogen, available phosphorus, available potassium...

2010
Joseph D. Shorthouse

The Central Plains of Western Canada comprise the Prairies Ecozone and the Boreal Plains Ecozone. The former has the most grasslands and is divided into seven ecoregions: Mixed Grassland, Cypress Upland, Moist Mixed Grassland, and Fescue Grassland in southern Alberta and Saskatchewan; Aspen Parkland, which extends in an arc from central Alberta and Saskatchewan southeast to southwestern Manitob...

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