Geomorphological approach to the location of ancient Khmer capitals and reconstruction of their production system

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This study aims to clarify the location of the Pre-Angkorean(5-9th century) capital cities from the field of natural science and geomorphology in and around Cambodia. Using aerial photography and remote sensing data of the target area, we carried out field survey by the method of geomorphology and land use, sampling, analysis and dating of sediment, and archaeological trench investigation.As a result, we discussed the location of the Sambor Prei Kuk archaeological site in Central Cambodia, by analysis of microtopography and sediments of the floodplain of Sen river in Tonle Sap River basin. In addition, we conducted research in archaeological trenches in Sambor Prei Kuk and Wat Phou in Laos, to clarify the stratigraphy and age with C-14 dating.The result of this research was presented at the 2011 INQUA Congress etc, and published in international journals such as Nagumo et al.(2010) and Nagumo et al.(2011).