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Penman2Mo nteith 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。

The check method o f w ater co nsumption is a technical suppor t fo r the strictest water r esources management system. In this paper, the Penman2Mo nteith equation recommended by FAO w as adopted to calculate t he daily crop wat er requirement and net irr igat ion wat er demand fo r the three main cr ops in Liang shan Co unty o f Jining City in Shandong Prov ince. The facto rs such as cr op plant ing ar ea and irr ig ation w ater use coefficient wer e co nsidered in t his study and the concepts of theor etical w ater use and co nv ersio n coefficient wer e pro po sed. T hroug h the calculation of the conver sion coefficient between the theo retical and actu2 al wat er use, the irr ig ation w ater consum ption r esults w ere checked fo r 2011 and 2012 in Liangshan County. The relat ive err or s wer e 0. 08% and - 1. 52%, respect ively, indicating that the check results are accur ate.

国家自然科学基金( 41172203; 41201029) ; 高等学校博士学科点专项科研基金( 20120094120019 ) ; 中国博士后科学基金面上资 助( 2013M 540410)