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用水量核算方法是最严格水资源管理制度实施的一项技术支撑。以山东济宁市梁山县为研究区,采用FAO(国际粮农组织)推荐的Penman-Monteith公式,计算了该县3种主要农作物的逐日作物需水量及净灌溉需水量。研究中考虑到研究区的作物种植面积、灌溉水利用系数等因素提出理论需水量和折算系数的概念,通过推求理论需水量与实际用水量的折算系数,对2011年和2012年梁山县灌溉用水量统计数据进行核算,核算的相对误差分别为0.08%和-1.52%,核算结果较好。
Water accounting method is the most stringent water resources management system implementation of a technical support. Taking Liangshan County of Jining City, Shandong Province as a study area, Penman-Monteith formula recommended by FAO (International Organization for Agricultural Science) was used to calculate daily water demand and net irrigation water demand of three main crops in the county. In this study, the concept of theoretical water demand and conversion coefficient was proposed considering the planting area of crops and coefficient of utilization of irrigation water in the study area. By deducing the conversion coefficient of theoretical water demand and actual water consumption, the irrigation water use of Liangshan County in 2011 and 2012 The amount of statistical data for accounting, accounting for the relative error of 0.08% and -1.52%, accounting results are better.