2篇
您的检索式：作者名="Dimitrios D.Alexakis"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Assessment of water-induced soil erosion as a threat to cultural heritage sites:the case of Chania prefecture,Crete Island,Greece显示文摘Among the environmental threats,the intensification of natural hazards,such as soil erosion may threaten the integrity and value of cultural heritage sites.In this framework,the present study’s main objective was to identify archaeological sites susceptible by soil erosion,taking the case study of Chania prefecture in Crete Island.Remotely sensed and other available geospatial datasets were analyzed in a GIS-based empirical model,namely Unit Stream Power Erosion and Deposition(USPED),to estimate the average annual soil loss and deposition rates due to waterinduced erosion in the study area.The resultant erosion map was then intersected with the locations and surrounding zones of the known archaeological sites for identifying the sites and the portions of their vicinity being at risk.The results revealed that Chania prefecture and its cultural heritage are significantly affected by both soil loss and deposition processes.Between the two processes,soil loss was found to be more intensive,influencing a larger part of the prefecture(especially to the west)as well as a higher amount of archaeological sites.The extreme and high soil loss classes were also detected to cover the most considerable portion of the sites’surrounding area.The identification of the archaeological sites being most exposed to soil erosion hazard can constitute a basis for cultural heritage managers in order to take preventive preserva-tion measures and develop specific risk mitigation strategies. | Christos Polykretis Dimitrios D.Alexakis Manolis G.Grillakis Athos Agapiou Branka Cuca Nikos Papadopoulos Apostolos Sarris | 2022 | Big Earth Data2022，6，4： | 0 |
| 2 | Spectral sensitivity of ALOS, ASTER, IKONOS, LANDSAT and SPOT satellite imagery intended for the detection of archaeological crop marks显示文摘This study compares the spectral sensitivity of remotely sensed satellite images,used for the detection of archaeological remains.This comparison was based on the relative spectral response(RSR)Filters of each sensor.Spectral signatures profiles were obtained using the GER-1500 field spectroradiometer under clear sky conditions for eight different targets.These field spectral signature curves were simulated to ALOS,ASTER,IKONOS,Landsat 7-ETM-,Landsat 4-TM,Landsat 5-TM and SPOT 5.Red and near infrared(NIR)bandwidth reflectance were re-calculated to each one of these sensors using appropriate RSR Filters.Moreover,the normalised difference vegetation index(NDVI)and simple ratio(SR)vegetation profiles were analysed in order to evaluate their sensitivity to sensors spectral filters.The results have shown that IKONOS RSR filters can better distinguish buried archaeological remains as a result of difference in healthy and stress vegetation(approximately 18%difference in reflectance of the red and NIR band and nearly 0.07 to the NDVI profile).In comparison,all the other sensors showed similar results and sensitivities.This difference of IKONOS sensor might be a result of its spectral characteristics(bandwidths and RSR filters)since they are different from the rest of sensors compared in this study. | Athos Agapiou Dimitrios D.Alexakis Diofantos G.Hadjimitsis | 2014 | International Journal of Digital Earth2014，7，5： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员