Paleoenvironmental history of the West Baray, Angkor (Cambodia)

Day, Mary Beth and Hodell, David A. and Brenner, Mark and Chapman, Hazel J. and Curtis, Jason H. and Kenney, William F. and Kolata, Alan L. and Peterson, Larry C. (2012) Paleoenvironmental history of the West Baray, Angkor (Cambodia). Proceedings of the National Academy of Sciences, 109 (4). pp. 1046-1051. ISSN Online ISSN 1091-6490 DOI 10.1073/pnas.1111282109

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Official URL: http://www.pnas.org/content/early/2012/01/03/11112...

Abstract

Angkor (Cambodia) was the seat of the Khmer Empire from the 9th to 15th century AD. The site is noted for its monumental architecture and complex hydro-engineering systems, comprised of canals, moats, embankments, and large reservoirs, known as barays. We infer a 1,000-y, 14C-dated paleoenvironmental record from study of an approximately 2-m sediment core taken in the largest Khmer reservoir, the West Baray. The baray was utilized and managed from the time of construction in the early 11th century, through the 13th century. During that time, the West Baray received relatively high rates of detrital input. In the 14th century, linear sedimentation rates diminished by an order of magnitude, yielding a condensed section that correlates temporally with episodes of regional monsoon failure during the late 14th and early 15th century, recorded in tree ring records from Vietnam. Our results demonstrate that changes in the water management system were associated with the decline of the Angkorian kingdom during that period. By the 17th century, the West Baray again functioned as a limnetic system. Ecologic and sedimentologic changes over the last millennium, detected in the baray deposits, are attributed to shifts in regional-scale Khmer water management, evolving land use practices in the catchment, and regional climate change.

Item Type: Article
Uncontrolled Keywords: 2011AREP; IA64;
Subjects: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Divisions: 01 - Climate Change and Earth-Ocean Atmosphere Systems
Journal or Publication Title: Proceedings of the National Academy of Sciences
Volume: 109
Page Range: pp. 1046-1051
Identification Number: 10.1073/pnas.1111282109
Depositing User: Sarah Humbert
Date Deposited: 06 Feb 2012 16:35
Last Modified: 23 Jul 2013 10:03
URI: http://eprints.esc.cam.ac.uk/id/eprint/2353

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