Essays about: "GEM"

Showing result 26 - 30 of 67 essays containing the word GEM.

1. 26. Glacial lake flood hazard assessment and modelling : a GIS perspective

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Maimoona Zehra Jawaid; [2017]
   Keywords : moraine dammed lake; Himalayas; Bhutan; GIS; hazard assessment; dynamic flood model; glacial lake; Physical Geography; ecosystem analysis; digital elevation model; GEM; Earth and Environmental Sciences;

   Abstract : High mountain regions have experienced decreased glacier stability due to varying climate conditions. As glaciers melt, they are being replaced by glacial lakes of different sizes, some of which are prone to outburst flooding, and have caused catastrophic damage to downstream settlements and infrastructure. READ MORE

3. 27. Joint use of Sentinel-1 and Sentinel-2 for land cover classification : a machine learning approach

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Miguel Gumersindo Castro Gomez; [2017]
   Keywords : Random Forest; temporal series; Physical Geography and Ecosystem analysisoptical; GEM; land cover classification; SAR; Earth and Environmental Sciences;

   Abstract : Reliable information on land cover is required to assist and help in the decision-making process needed to face the environmental challenges society has to deal with due to climate change and other driving forces. Different methods can be used to gather this information but satellite earth observation techniques offer a suitable approach based on the coverage and type of data that are provided. READ MORE

4. 28. Application of GALDIT index in the Mediterranean region to assess vulnerability to sea water intrusion

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Tracy Zaarour; [2017]
   Keywords : aquifer; Physical Geography and Ecosystem analysis; Sea Water Intrusion SWI ; Vulnerability Index VI ; GALDIT VI; Groundwater; GEM; Earth and Environmental Sciences;

   Abstract : GALDIT is a Vulnerability Indexing (VI) methodology that uses ranges, ratings and weights developed as a preliminary decision support tool to predict groundwater areas prone to Sea Water Intrusion (SWI). It has been only applied on porous coastal aquifers to date, in Mediterranean coastal regions, where SWI has become a growing problem. READ MORE

5. 29. Multi-objective optimisation algorithms for GIS-based multi-criteria decision analysis : an application for evacuation planning

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Jose Ignacio Diaz Gonzalez; [2016]
   Keywords : decision-making; decision analysis; optimisation algorithm; multi-objective; multi-criteria; GIS; geography; physical geography; SPSO; NSGA-II; AMOSA; MOGWO; GEM; Earth and Environmental Sciences;

   Abstract : Geographic Information Systems (GIS) have acquired greater relevance as tools to support decision-making processes, and during the last decades they have been used in conjunction with Multi-Criteria Decision Analysis techniques (GIS-MCDA) to solve real-world spatial problems. GIS-MCDA can be generally divided in Multi-Attribute and Multi-Objective techniques. READ MORE

6. 30. Improvement of the GPP estimations for Sudan using the evaporative fraction as water stress factor

   University essay from Lunds universitet/Institutionen för naturgeografi och ekosystemvetenskap

   Author : Maria Angela Dissegna; [2016]
   Keywords : semi-arid regions; light use efficiency models; evaporative fraction; gross primary production; Physical Geography and Ecosystem analysis; GEM; Earth and Environmental Sciences;

   Abstract : Estimation of GPP in Sudan using the evaporative fraction as water stress factor The Gross Primary Production "GPP" quantifies the amount of carbon entering an ecosystem. It is an ecosystem service since it is a source of energy for all organisms and it is estimated to reduce atmospheric CO2 in about 123 Pg C per year at the global scale. READ MORE