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一、水稻需水量计算方法概述水稻需水量是灌区规划设计、运行管理、水资源供需平衡中必不可少的基本资料。它是指水稻植株蒸腾和棵间田面物理蒸发的总水量,一般通过试验资料加以确定。但在实际应用中,常因试验资料年限较短,不可能直接求得多年平均和各种保证率的需水量;而对缺乏资料地区,往往借用邻近试验地区的资料,这就不可避免地要牵涉到水稻需水量的计算公式问题。我省自五十年代以来,一般都采用水面蒸发法来求得多年平均及各种保证率下的需
First, an overview of rice water requirements calculation Paddy water demand is an indispensable basic information in the planning and design, operation and management, and water supply and demand balance in the irrigated area. It refers to the total amount of water transpiration and physical evaporation of paddy field between rice plants, generally determined by test data. However, in practical applications, it is often impossible to directly obtain the demand for water with multi-year average and various assurance rates due to the short-term test data. For those areas lacking data, it is often necessary to borrow information from neighboring test areas Involved in the formula of rice water demand problem. Since the 1950s, our province has generally adopted the water surface evaporation method to obtain the average and various types of guaranteed rates