Vahid Sharifi | Savitribai Phule Pune University (original) (raw)

Papers by Vahid Sharifi

International Journal of Remote Sensing, Jan 1, 2005

... DOI: 10.1080/01431160500117865 CN Mundia a * &amp;amp; M. Aniya a pages 2831-2849. Av... more ... DOI: 10.1080/01431160500117865 CN Mundia a * &amp;amp; M. Aniya a pages 2831-2849. Available online: 22 Feb 2007. ...

Remote sensing of Environment, Jan 1, 2003

Thermal remote sensing has been used over urban areas to assess the urban heat island, to perform... more Thermal remote sensing has been used over urban areas to assess the urban heat island, to perform land cover classifications and as input for models of urban surface atmosphere exchange. Here, we review the use of thermal remote sensing in the study of urban climates, focusing primarily on the urban heat island effect and progress made towards answering the methodological questions posed by Roth et al.

… sensing of environment, Jan 1, 2003

The influence of zoning on Normalized Difference Vegetation Index (NDVI) and radiant surface temp... more The influence of zoning on Normalized Difference Vegetation Index (NDVI) and radiant surface temperature (T s ) measurements is investigated in the City of Indianapolis, IN, USA using data collected by the Enhanced Thematic Mapper Plus (ETM+) remote sensing system. Analysis of variance indicates statistically significant differences in mean T s and NDVI values associated with different types of zoning. Multiple comparisons of mean T s and NDVI values associated with specific pairings of individual zoning categories are also shown to be significantly different. An inverse relationship between T s and NDVI was observed across the city as a whole and within all but one zoning category. A range of environmental influences on sensible heat flux and urban vegetation was detected both within and between individual zoning categories. Examples for implementing these findings in urban planning applications to find examples of high and low impact development are demonstrated. D

Landscape and Urban planning, Jan 1, 2004

This study analyzes urban expansion and spatial restructuring of land use patterns in the Pearl R... more This study analyzes urban expansion and spatial restructuring of land use patterns in the Pearl River Delta of south China by using remote sensing and GIS. The region has pioneered the nation in economic development and urbanization process. Tremendous land use changes have been witnessed since the economic reform in 1978. Land use changes over two time periods, 1988-1993 and 1993-1997, are analyzed to demonstrate how enforcing land use policies can influence the direction and magnitude of landscape change. The adoption of a market economy has resulted in the internal restructuring of agricultural land use from traditional paddy production to more diversified agricultural activities, such as growing cash crops, fruits and aquaculture. Spatial dependency of land use changes and variations of land development can be identified between the eastern development corridor and the western development corridor. The measurement of spatial patterns is accomplished by using the indicators of compactness index and entropy. This study provides new evidence with spatial details about the uneven land development in the Pearl River Delta.

… Journal of Remote Sensing, Jan 1, 1997

The earth's surface. This is a composite of numerous satellite images, each selected to be cloud-... more The earth's surface. This is a composite of numerous satellite images, each selected to be cloud-free. It is unrealistic because, at any moment, half of the Earth is in nighttime darkness and much of it is cloud-covered. But this beautiful image lets us view the entire surface at once. It shows densely vegetated regions in green, dry deserts in yellow or brown, and ice-covered regions in white.

Applied Geography, Jan 1, 2007

In this study, maximum likelihood supervised classification and post-classification change detect... more In this study, maximum likelihood supervised classification and post-classification change detection techniques were applied to Landsat images acquired in 1987 and 2001, respectively, to map land cover changes in the Northwestern coast of Egypt. A supervised classification was carried out on the six reflective bands for the two images individually with the aid of ground truth data. Ground truth information collected during six field trips conducted between 1998 and 2002 and land cover map of 1987 were used to assess the accuracy of the classification results. Using ancillary data, visual interpretation and expert knowledge of the area through GIS further refined the classification results. Post-classification change detection technique was used to produce change image through cross-tabulation. Changes among different land cover classes were assessed. During the study period, a very severe land cover change has taken place as a result of agricultural and tourist development projects. These changes in land cover led to vegetation degradation and water logging in part of the study area. r

Applied Geography, Jan 1, 2009

Land use and land cover (LULC) Remote sensing Change detection Urban expansion a b s t r a c t

Environmental Management, Jan 1, 2001

A methodology is developed to relate urban growth studies to distributed hydrological modeling us... more A methodology is developed to relate urban growth studies to distributed hydrological modeling using an integrated approach of remote sensing and GIS. This linkage is possible because both studies share land-use and landcover data. Landsat Thematic Mapper data are utilized to detect urban land-cover changes. GIS analyses are then conducted to examine the changing spatial patterns of urban growth. The integration of remote sensing and GIS is applied to automate the estimation of surface runoff based on the Soil Conservation Service model. Impacts of urban growth on surface runoff and the rainfall-runoff relationship are examined by linking the two modeling results with spatial analysis techniques. This methodology is applied to the Zhujiang Delta of southern China, where dramatic urban growth has occurred over the past two decades, and the rampant urban growth has created severe problems in water resources management. The results revealed a notably uneven spatial pattern of urban growth and an increase of 8.10 mm in annual runoff depth during the 1989 -1997 period. An area that experienced more urban growth had a greater potential for increasing annual surface runoff. Highly urbanized areas were more prone to flooding. Urbanization lowered potential maximum storage, and thus increased runoff coefficient values.

Remote Sensing of Environment, Jan 1, 2005

Urban development has expanded rapidly in the Tampa Bay area of west-central Florida over the pas... more Urban development has expanded rapidly in the Tampa Bay area of west-central Florida over the past century. A major effect associated with this population trend is transformation of the landscape from natural cover types to increasingly impervious urban land. This research utilizes an innovative approach for mapping urban extent and its changes through determining impervious surfaces from Landsat satellite remote sensing data. By 2002, areas with subpixel impervious surface greater than 10% accounted for approximately 1800 km 2 , or 27 percent of the total watershed area. The impervious surface area increases approximately three-fold from 1991 to 2002. The resulting imperviousness data are used with a defined suite of geospatial data sets to simulate historical urban development and predict future urban and suburban extent, density, and growth patterns using SLEUTH model. Also examined is the increasingly important influence that urbanization and its associated imperviousness extent have on the individual drainage basins of the Tampa Bay watershed. D

International Journal of Remote Sensing, Jan 1, 2008