风沙区参考作物需水量计算模式的研究

根据包头气象站30a逐旬气象资料和2001年作物生长期逐日资料,用Penman-Monteith公式、Blaney-Criddle公式、Hargreaves公式、Priestley-Taylor公式、Markkink公式估算逐旬和逐日的参考作物需水量(ET0),以Penman-Monteith方法计算结果作为标准来评价其它4种计算方法。经比较分析,用其它4种方法和Penman-Monteith方法计算出的逐旬ET0值均具有较好的相关性,其中以Blaney-Criddle法估算结果最好。4种方法估算的逐日ET0误差较大,相比而言,Markkink法优于其它3种方法。同时,分析了ET0与气温的关系,并建立了适合该地区ET0计算的经验公式,用经验公式估算ET0方法简单,且具有较高的精度。

Study of the model to compute crop water requirements in windy and sandy regions

The Penman-Monteith, Blaney-Criddle, Hargreaves, Prestley-talylor and Markkink formula are used to compute ten-day and daily crop evapo-transpriations (ET_0) with 30-year ten-day meteorological data collected by Baotou meteorological station and the daily data of crop growth of 2001 collected by Baotou meteorological station, and the results of the computation by the Penman-Monteith formulae is used to evaluate the computations by the other four formula. The ten-day ET_0s computed with the Penman-Monteith formulae and the other formula all has very good correlativity and the ten-day ET_0 by the Blaney-Criddle formulae is better than those by the other formulae. The daily ET_0s computed by the four formula show relatively big errors and the daily ET_0 computed by the Markkink formula is better than the ET_0s computed by the other formula. Meanwhile, the relation between the ET_0 and atmospheric temperature is analyzed and empirical formulae suitable to compute the ET_0 in the regions under question is established. The computation by the empirical formulae to compute the ET_0s is simple and accurate.