Water Consumption under Advective Conditions in Irrigate Fields under an Arid Climate

This is the authors' abstract. We don't add key points for this paper.

In arid regions, evapotranspiration at the edge of irrigated fields sometimes shows a high value. When planning irrigation, spatial differences of water consumption in the field have to be taken into account. A two dimensional numerical model which simulates the formation of boundaries on vapor pressure and temperature was used to estimate evaporation along the fetch. The estimated results of the model were compared with the data obtained from a wind tunnel. The effects of upwind surface temperature on evaporation on the downwind field were clarified.The data observed in one of the deserts in China were applied in the calculation to discuss the distribution pattern of water consumption along the fetch. The applicability of Bowen ratio method is also discussed and the calculated results show it takes over 200m from the leading edge to achieve a good estimation.