Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53553#.VMiLzyzQrzE Author(s)   Mohammad Ashraf 1 , Rabeya Nawaz 2   Affiliation(s) 1 CSIR-NET (Earth Sciences), UGC-JRF (Geography), Department of Geography, Patna University, Patna, India . 2 M. Tech 2nd Year, Centre of Mining Environment, Indian School of Mines, Dhanbad, India . ABSTRACT Wetlands are those landscapes which are saturated with water or covered by water either perennially or for a major part of the year. Due to transforming nature of the wetlands from aquatic to terrestrial, the related physical features are not easy to be monitored. With the recent advancement in Remote sensing technique, the feature extraction of wetland with the help of different satellite derived band algebras including Normalized Difference Vegetation Index (NDVI), Normalized Difference Water Index (NDWI), Modified NDWI (MNDWI), Normalized Difference Moisture Index...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53537#.VMh-CizQrzE Author(s)    L. C. Alatorre 1* , E. Sánchez 2 , J. P. Amado 1 , L. C. Wiebe 1 , M. E. Torres 1 , H. L. Rojas 1 , L. C. Bravo 1 , E. López 1 , E. López 1   Affiliation(s) 1 Multidisciplinary Division of the Autonomous University of Ciudad Juarez in Cuauhtémoc, Chihuahua, México . 2 Autonomous University of Ciudad Juárez, Ciudad Juárez, Chihuahua, México . ABSTRACT This paper analyzed the temporal and spatial evolution of vegetation dynamics in various land covers in the basin of the Laguna Bustillos, Region of Cuauhtémoc, Chihuahua, Mexico. We used an NDVI time series for the months of March to April (early spring). The series was constructed from Landsat TM images for the period 1986-2011. The results show an increase of NDVI for vegetated areas, especially in conifer cover, while shrub and grassland showed a positive trend but wi...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53232#.VLh0v8nQrzE Author(s)   Tongrui Zhang , Gengxing Zhao , Chunyan Chang , Zhuoran Wang , Ping Li , Deyu An , Jichao Jia Affiliation(s) College of Resources and Environment, National Engineering Laboratory for Efficient Utilization of Soil and Fertilizer Resources, Shandong Agricultural University, Tai’an, China . ABSTRACT In order to get RS method to extract soil salinity of the Yellow River Delta, we set Kenli County as typical Yellow River Delta to be research area and get data of soil salinity through field investigation. By using RS image of Landsat-8 of March 14, 2014 and analyzing information features of each band and surface spectral features of research areas, we select out sensitive bands and build Soil Salinity Information Extraction (SSIE) model and vegetation index NDVI model for comparison. And then, we accordingly classify grades of soi...