°µÍøÊÓƵ

Nawon Kang, Ph.D., Texas A&M University will be presenting on "Impact of the Reclamation Act on agricultural development and population dynamics in the western United States" on Thursday, January 29, 2026, from 3:00 PM - 4:00 PM in SSPA-103. 

Abstract: This study examines the long-term impacts of USBR dams on agricultural productivity and population growth in the Western United States, emphasizing the critical role of canals. Using a staggered Difference-in-Differences (DiD) approach and hydrography-based treatment and control groups, we assess the effects of USBR dams on downstream counties. Our findings reveal three key insights. First, the impact of USBR dams on irrigated land and population growth in downstream counties is contingent on the presence of canals. In the absence of canals, USBR dams did not significantly influence agricultural expansion or settlement. Second, in downstream counties with canals, population increased by 29%, and agricultural expansion was driven by a substantial rise in corn acreage (105%), a highly water-intensive crop. Wheat acreage also increased (82%), while other crops, such as barley and hay, exhibited no significant change in acreage. Third, while barley and hay acreage remained stable, their yields improved due to enhanced water availability. These results underscore the indispensable role of canals in translating dam infrastructure into tangible economic and demographic growth. This study provides valuable insights into the historical and contemporary implications of water management investments in addressing challenges posed by arid conditions and climate variability, and highlights the importance of complementary infrastructure in enhancing the benefits of USBR dams.

Image