CRAE模型在新疆和田绿洲的适用性分析

新疆和田绿洲降水较少和气候干旱,蒸散发是区域内水分消耗的主要途径,合理估算蒸散发量可为绿洲地区水资源的合理配置等提供依据。利用和田站2006-2014年的气象资料以及2006-2014年的水文资料,运用CRAE模型和水量平衡法计算和田绿洲实际蒸散发量,验证CRAE模型在该地区的适用性。结果表明:模型模拟结果平水年和多年平均实际蒸散发量结果较好,枯水年和丰水年的结果误差较大;模型计算的蒸发能力ET_p与P-M公式和Hargreaves公式相比结果更为合理;利用水量平衡系数、总量平衡系数和相关系数对计算结果进行评价,误差均在合理范围内。CRAE模型在和田绿洲地区应用效果较好,可用于估算该地区多年实际蒸散发量。

Applicability of CRAE model in Hotan oasis of Xinjiang

The precipitation is less and the climate is arid in hotan oasis of Xinjiang.The evapotranspiration is the main way of water consumption in the region.The reasonable estimation of evapotranspiration can provide the basis for the reasonable allocation of water resources in oasis area. Based on the meteorological data from 2006 to 2014 and hydrology data from 2006 to 2014, the paper used CRAE model and water balance method to calculate the actual evapotranspiration in Hetian oasis, and verified the applicability of CRAE model in this area. The results show that the simulation result of flat water years is better than that of mean annual actual evapotranspiration,the error results of dry year and wet year is larger;the result of evaporation capacity ET_p calculated by the model is more reasonable than that of P-M equation and Hargreaves formula;the paper used water balance coefficient, total amount balance coefficient and correlation coefficient to evaluate the results of calculation.The error is in a reasonable range. The CRAE model has good application effect in the area of oasis, which can be used to estimate the actual evapotranspiration in the area.