TY - JOUR A2 - Brestic, Marian AU - Zhang, Shengwei AU - Zhao, Hongbin AU - Lei, Huimin AU - Shao, Hongbo AU - Liu, Tingxi PY - 2015 DA - 2015/01/06 TI - Winter Wheat Water Productivity Evaluated by the Developed Remote Sensing Evapotranspiration Model in Hebei Plain, China SP - 384086 VL - 2015 AB - Agricultural water is the main reason for the rapid decline of the NCP groundwater levels. It is of vital importance for the NCP sustainable agricultural development to master the ETa and its CWP. In this paper, the EBEM model was developed according to the theory of energy balance. From 2001 to 2006, the winter wheat ETa and CWP were estimated, and the spatial and temporal variations and their influencing factors were studied in the Hebei Plain. The results indicate that the EBEM model performed well by applying MODIS data to estimate the daily net radiation and ETa. For the daytime net radiation, the relative error between the estimation and the measurement amounted to 8.2% and the SEE was 0.82 MJ m−2/day. The average ETa deviation between the estimates and the measures amounted to 0.86 mm daily, and the SEE was 1.2 mm. The spatial variations indicated that the major distribution of ETa ranged from 350 to 450 mm, which trended downward within the study area from west to east. In the study period, the winter wheat CWP was mainly distributed between 0.29 and 1.67 kg/m3. In space, the CWP was higher in the west than in the east. SN - 2356-6140 UR - https://doi.org/10.1155/2015/384086 DO - 10.1155/2015/384086 JF - The Scientific World Journal PB - Hindawi Publishing Corporation KW - ER -