Abstract:
The Changwu tableland in the Loess Plateau, China was selected as the study area to analyze the water balance of farmlands (corn) through measuring and evaluating various components of water budget such ascanopy interception, soil water content and evapotraspiration. The purpose is to understand and evaluate the eco-hydrological effect of farmlands in the Loess tableland. The results showed that the annual precipitation during the years of 2012-2014 was lower than that of long-time average annual value, and the precipitation in the rainfall reason was higher than that of long-time average annual value. The closure error of water balance in the farmlands was high, indicating there was not balance of water budget, and the reasons would be time scale, rainstorm event and measurement error. The results would provide theoretical support for the restructuring of farmland and orchard in the Loess Plateau and the sustainable use of limited soil water resources.
