Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=54109#.VO2BaCzQrzE Author(s)   Carly Hyatt Hansen 1 , Gustavious P. Williams 2 , Zola Adjei 2   Affiliation(s) 1 Department of Civil and Environmental Engineering, University of Utah, Salt Lake City, USA . 2 Department of Civil and Environmental Engineering, Brigham Young University, Provo, USA . ABSTRACT Algae blooms pose a threat to water quality by depleting oxygen during decomposition and also cause other issues with water quality and water use. Algae biomass is traditional monitored through field samples analyzed for chlorophyll-a, a pigment present in all algae. Field sampling can be time- and cost-intensive, especially in areas that are difficult to access and provides only limited spatial coverage. Estimations of algal biomass based on remote sensing data have been explored over the past two decades as a supplement to information obtained ...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53723#.VNB0jizQrzE Author(s)   Fatwa Ramdani 1* , Sabaruddin Rahman 2 , Putri Setiani 3   Affiliation(s) 1 Geoinformatic Research Center, Information Technology and Computer Science, Brawijaya University, Malang, Indonesia . 2 Department of Ocean Engineering, Faculty of Engineering, Hasanuddin University, Makassar, Indonesia . 3 Graduate School of Environmental Studies, Tohoku University, Sendai, Japan . ABSTRACT Mapping and assessment of mangrove environment are crucial since the mangrove has an important role in the process of human-environment interaction. In Indonesia alone, 25% of South East Asia's mangroves available are under threat. Recognizing the availability and the ability of new sensor of Landsat data, this study investigates the use of Landsat ETM + 7 and Landsat 8, acquired in 2002 and 2013 respectively, for assessing the extent of mangrov...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53566#.VMnUDizQrzE Author(s)    Paipai Pan 1 , Guoyue Chen 2 , Kazuki Saruta 2 , Yuki Terata 2   Affiliation(s) 1 Graduate School of Systems Science and Technology, Integrated Course of Systems Science and Technology, Akita Prefectural University, Yurihonjo City, Japan . 2 Department of Electronics and Information Systems, Akita Prefectural University, Yurihonjo City, Japan . ABSTRACT In the present work, a new snow cover detection method based on visible red and blue bands from MODIS imagery data is proposed for Akita prefecture under the sunny cloud-free conditions. Before the snow cover detection, the MODIS imagery of the study area is pre-processed by geographic correction, clipping, atmospheric correction and topographic correction. Snow cover detection is carried out by applying the reflectance similarities of snow and other substances in t...

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=53322#.VL3BWizQrzE Author(s)   Reginald R. Muskett 1 , Vladimir E. Romanovsky 1,2 , William L. Cable 1 , Alexander L. Kholodov 1   Affiliation(s) 1 Geophysical Institute, University of Alaska Fairbanks, Fairbanks, USA . 2 Tyumen State Oil and Gas University, Tyumen, Russia . ABSTRACT Soil moisture is a vital physical parameter of the active-layer in permafrost environments, and associated biological and geophysical processes operative at the microscopic to hemispheric spatial scales and at hourly to multi-decadal time scales. While   in-situ   measurements can give the highest quality of information on a site-specific basis, the vast permafrost terrains of North America and Eurasia require space-based techniques for assessments of cause and effect and long-term changes and impacts from the changes of permafrost and the active-layer. Satellite-...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53299#.VLydg8nQrzE Author(s)    Lazar Mohammed 1 , Aliou Diongue 2 , Jeng-Tze Yang 3 , Doumandji-Mitiche Bahia 4 , Lecoq Michel 5   Affiliation(s) 1 Institut National de la Protection des Végétaux, Alger, Algérie . 2 United Nations World Food Programme, Dakar, Sénégal . 3 National Chung-Hsing University, Taichung, Chinese Taipei . 4 Ecole Nationale Supérieure Agronomique, Alger, Algérie . 5 CIRAD, Montpellier, France . ABSTRACT In the southern Algerian Sahara, populations of the desert locust have been monitored during the past 43 years. On a limited study area, the use of remote sensing data from Landsat 7 ETM+ and Terra MODIS, coupled with the locust population database, allowed the identification and mapping of solitary desert locust breeding areas during remission periods. These sites are mainly located in wadis and in areas of accumulation/spre...