When the operating time is constant, the plastic film cover of precipitation is decided by the rainfall duration and daily evaporation.
当操作时间一定时，塑苫的降水量由降水持续时间和日蒸发量决定。
Through monitoring farmland runoff and analyzing daily rainfall for 23 years in Shanghai, this paper provided the characteristics of farmland rainfall runoff in Huangpu River Basin.
通过农田降雨径流监测试验，并对上海市历时23年的逐日降雨资料进行汇总与系统分析，确定黄浦江流域农田地表降雨径流特征。
Actual evapotranspiration is a significant variable in the water balance calculation. It links daily rainfall, irrigation amount and soil bypass flow to calculate an immobile water deficit.
实际作物腾发量是水平衡模型计算的一个重要变量，它和每日降雨量，灌溉量及土壤径流量共同计算静止水的亏缺量。
The model can reasonably reproduce the daily precipitation events over East Asia for the summer of 1991, especially in the Yangtze-Huaihe valley where the anomalous rainfall occurred.
试验结果显示，该模式能够合理地模拟出1991年夏季东亚地区的逐日降水过程，特别是在江淮流域发生的异常降水事件。
Its erosivity is usually estimated by the product of rain kinetic energy times the biggest rain density during a certain period, and also, can be determined by the daily rainfall amount.
降雨是影响土壤侵蚀的主要因素，降雨侵蚀力通常用降雨动能和一段时间的最大雨强的乘积表示，简化的计算也可用日降雨量估算。
The results show that the daily rainfall insurance rate effectively guides the choice of the alfalfa harvest times.
结果表明：逐日降水量保证率对指导苜蓿收获期的选择是行之有效的；
The climatic conditions contributing to this high quality are enough sunlight in growing period abundant rainfall and higher daily temperature variation in summer.
形成这种品质特征的主要原因是丘陵区独特的气候条件：生长期充足的日照、较为丰富的降水量和夏季较大的气温日较差。
Daily and event data from 8 weather stations was used to analyze the relationship between daily and event rainfall.
利用全国8个气象站次降雨和日降雨资料，分析了次、日降雨关系。
A function relationship between the daily rainfall over a large area and its area has been researched using the observed precipitation data in China in recent 40 years.
根据中国近40年逐日降水观测资料，分析了大范围空间域上不同等级日降水量与其占有面积的函数关系。
In this paper the climatology of the precipitation, the daily rainfall series of months 5-8 and the correlative weather systems are analysed.
本文采用自然正交函数分解法对我国南方地区的降水气候序列与夏季（5～8月）逐日降水序列进行时空特征分析和对应天气形势分析。
The peak of average daily rainfall amount just occurred in this region.
暴雨的平均日雨量峰值也恰位在该区。
The peak of average daily rainfall amount just occurred in this region.
暴雨的平均日雨量峰值也恰位在该区。
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