Drought Contributed to Collapse of Angkor

I think that studying the collapse of past civilizations can provide useful information to the prepper/survivalist, even if its nothing more than identifying how people respond to adverse conditions. So, with that, here is an article from MSNBC concerning the demise of Angkor, home of the famous temple complex of Angkor Wat:

The ancient city of Angkor — the most famous monument of which is the breathtaking ruined temple of Angkor Wat — might have collapsed due to valiant but ultimately failed efforts to battle drought, scientists find.

The great city of Angkor in Cambodia, first established in the ninth century, was the capital of the Khmer Empire, the major player in southeast Asia for nearly five centuries. It stretched over more than 385 square miles (1,000 square kilometers), making it the most extensive urban complex of the preindustrial world. In comparison, Philadelphia covers 135 square miles (350 sq. km), while Phoenix sprawls across more than 500 square miles (1,300 sq. km), not including the huge suburbs.

Suggested causes for the fall of the Khmer Empire in the late 14th to early 15th centuries have included war and land overexploitation. However, recent evidence suggests that prolonged droughts might have been linked to the decline of Angkor — for instance, tree rings from Vietnam suggest the region experienced long spans of drought interspersed with unusually heavy rainfall.

* * *
The researchers deduced a 1,000-year-long climate history of Angkor from the baray. They found at around the time Angkor collapsed the rate at which sediment was deposited in the baray dropped to one-tenth of what it was before, suggesting that water levels fell dramatically as well. The discovery "really emphasizes how significant the events during this period must have been," Day said.

As both water levels and sediment deposits ebbed, the ecology of the baray changed as well, with more bottom-dwelling algae and floating plants coming into existence.

"The ecological shift primarily serves to underline how environmental conditions in the West Baray have been fundamentally different since the 17th century, post-collapse, as compared to what the baray was like during Angkorian times," Day said.

In the end, the water management systems of the Khmer might have been insufficient to cope with sudden and intense variations in climate.

"Angkor can be an example of how technology isn't always sufficient to prevent major collapse during times of severe instability," Day told LiveScience. "Angkor had a highly sophisticated water management infrastructure, but this technologic advantage was not enough to prevent its collapse in the face of extreme environmental conditions."

"It's important to understand, however, that failure of the water management network was not the sole reason for the downfall of the Khmer Empire," Day added. "The collapse of Angkor was a complex process brought about by several different factors — social, political and environmental."

I would note that drought and a worsening crop situation can lead to social, political and environmental problems, so the last statement isn't really helpful. In any event, while the civilization at Angkor was more localized and, therefore, more sensitive to local differences in climate and rainfall, modern civilizations and cultures are not immune to environmental changes or disasters. As we saw from the Dust Bowl and Katrina, even modern America is subject to social disruption and migration due to environmental disasters. This is even more true of the many smaller nations of Europe and the near Middle-East that will have to suffer through the terrible natural disasters of the tribulation period described in Revelations.