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Showing result 6 - 10 of 20 essays matching the above criteria.

1. 6. Spatial assessment of NDVI as an indicator of desertification in Ethiopia using remote sensing and GIS

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Gezahagn Negash Seboka; [2016]
   Keywords : NDVI and Rainfall; land degradation; climate change; desertification; NOAA AVHRR; land cover; GIS; Physical Geography and Ecosystem analysis; Earth and Environmental Sciences;

   Abstract : Desertification is a serious environmental and socio-economic problem occurring at global, regional and local scale. According to Article 1(a) of the United Nations Convention to Combat Desertification (UNCCD), define the term “desertification” means “land degradation in arid, semi-arid and dry sub-humid (dry lands) areas resulting from various factors, including climatic variations and human activities”. READ MORE

3. 7. Exploring the spatial relationship between NDVI and rainfall in the semi-arid Sahel with geographically weighted regression

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Stefanos Georganos; [2016]
   Keywords : geomatics; rainfall; Sahel; scale dependency; non-stationarity; physical geography and ecosystem analysis; geographically weighted regression; Earth and Environmental Sciences;

   Abstract : The Normalized Vegetation Difference Index (NDVI) is frequently used as a surrogate for vegetation properties and is often correlated with climatic variables such as rainfall. However, studies have shown that conventional regression models used to study the spatial relationship between NDVI and rainfall are often plagued by non-stationarity and are scale dependent. READ MORE

4. 8. Characterization of plant-water interaction in Kilombero River Catchment in Tanzania using Normalized Difference Vegetation Index (NDVI)

   University essay from Stockholms universitet/Institutionen för naturgeografi och kvartärgeologi (INK)

   Author : Michael Getachew Minas; [2014]
   Keywords : NDVI; NDVI classes; areal coverage; time-series analyses; hydrological data;

   Abstract : Remote-sensing based indices such as Normalized Difference Vegetation Index have yielded valuable information about plant health. As the availability of water is one of the factors that controls plant's response to their environment, it is possible to indirectly studythe hydrology of an area via vegetation indices. READ MORE

5. 9. Polynomial trends of vegetation phenology in Sahelian to equatorial Africa using remotely sensed time series from 1983 to 2005

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Mozafar Veysipanah; [2014]
   Keywords : TIMESAT; remote sensing; GIMMS NDVI; Physical Geography and Ecosystem analysis; Sahel; phenology parameters; polynomial trends; vegetation; soil moisture; Earth and Environmental Sciences;

   Abstract : Popular science Our understanding of global warming can be achieved in different ways. One way is to study the phenological parameters of vegetation. READ MORE

6. 10. An attempt to investigate the impact of 1994 Tutsi Genocide in Rwanda on landscape using remote sensing and GIS analysis

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Maxime Rwaka; [2014]
   Keywords : Landsat TM and ETM ; NDVI; agricultural production and GDP; refugees; rainfall; geomatics; Earth and Environmental Sciences;

   Abstract : The 1994 Tutsi Genocide in Rwanda affected the society, as well as its surrounding environment. By the use of Remote Sensing and GIS, the study looked at the evidence of change to the landscape by looking at vegetation based on NDVI (Normalized Difference Vegetation Index) To explain the reason behind the noticed change, the following parameters were used: • rainfall variations, • refugees and population number, • GDP and agricultural production. READ MORE