Research
How do societies live with changing rivers and coasts?
Along the South Carolina coast and in southern Mesopotamia, communities have cultivated wetlands, redirected water, and built settlements in landscapes that continue to change. GeoArches investigates how those practices took shape, who organized the work, and what happens when inherited systems of water control encounter new environmental conditions.
Water and settlement
Rivers and tides shape the conditions of daily life.
In a tidal wetland, the timing and duration of flooding determine when a field can drain, where sediment accumulates, and which plants can grow. Along a river, a shifting channel can open a route to a settlement or cut it off. These processes create opportunities for cultivation and transport, but they also require people to anticipate and respond to change.
A canal or dike records an effort to manage water; its position, construction, and maintenance may also reveal how that effort was organized. We read these structures alongside sediment cores, settlement evidence, and historical records to ask who supplied the knowledge and labor, who controlled access, and how the benefits and costs were distributed.
The timescales differ. A flood can leave a deposit within hours, while a channel may shift abruptly or migrate over generations. Water-control structures may continue to shape drainage after the agricultural or political system that produced them has changed. Dating those histories allows us to test whether a change in water control preceded, followed, or accompanied a change in settlement.
Questions across the projects
What can we reconstruct from a changing landscape?
01
Water and cultivation
How did the timing of flooding, drainage, and sediment deposition create conditions for cultivation, and how did people modify those conditions?
02
Labor and water control
Who built and maintained canals, dikes, and fields, and who had the authority to direct that work or benefit from it?
03
The persistence of infrastructure
How do water-control structures, property boundaries, and remembered places continue to organize a landscape after their original purposes have changed?
04
Environmental and political change
When rivers shift, sea levels rise, or political systems change, which practices remain workable, and which require reorganization?
Comparative method
Comparing the Lowcountry and southern Mesopotamia
Both regions contain wetlands shaped by cultivation and water control, but their histories of settlement, labor, and political authority differ. Comparison asks whether a similar physical process produced different consequences under different social arrangements.
- Which effects of flooding, sedimentation, and drainage can be compared across the two regions?
- How did enslavement, property, and political authority determine who bore the costs of managing water?
- Under what conditions did canals and dikes reduce exposure to flooding, and when did their upkeep create new obligations or vulnerabilities?
- What can a long environmental record establish about a present management problem, and where does the historical comparison reach its limits?
Evidence and method
Connecting sediment, maps, and historical records
A core can preserve a sequence of environmental changes, but interpreting that sequence requires knowing where the sediment came from, how it accumulated, and when it was deposited. Field mapping and dating establish that context; archaeological and historical evidence help test how the sequence relates to occupation, cultivation, or changes in water management.
The records have different limits. A map may show a canal without recording the labor needed to maintain it. A plantation document may describe production while obscuring the knowledge and experiences of enslaved workers. Reading these sources alongside the material landscape makes those gaps part of the investigation.