降水

It is shown that the model can well simulates the daily runoff process in Hanzhong area and the model efficiency is similar to those of the lumped VIC and Xinanjiang Hydrological Model.Moreover,the proposed model considers the spatial variability of precipitation and underly...

结果表明，该模型能较好模拟汉中流域的日径流过程，其模拟精度与集总式VIC模型和集总式三水源新安江模型基本相当，但它充分考虑了研究流域内降水输入和下垫面条件的空间差异性，能够提供网格降水分布及流域内产汇流的分布状况，能进一步同中尺度MM5气象模式耦合，延长洪水预报的预见期。

For strong convective weather , it classified all historical sample events into 4 weather patterns (like northwest , trough area ,west wind and southwest current), established 4 characteristic fields of 400hPa height of HLAFS , then according to the principle of the pattern match calculate and compare the real-time HLAFS forecast products-2-using the similar method inside the big and small key areas , establish forecast equation , finally gain conclusion .To duststrom weather, the historical samples were sorted into duststrom and severe duststrom types in 5 regions (they are whole area, west, central, middle-west and middle-east of Inner Mongolia ),moreover set up different sample databases about ECMWF fields (including 500hPa height, 850hPatemperature and sea-level pressure).In order to making duststrom forecast at different time level , we first filtered the real-time data by FAX data ,and then used the method of similar range degree to compare the historical data to the actual data of ECMWF .To precipitation weather ,they were divided into 2 types that suit or unsuit airplane artificial precipitation stimulation in line with their emergence time and district .The appropriate weather physical factors come from T106 were chosen to establish the artificial precipitation stimulation prediction model . In the actual application , we can get prediction result as long as use the real-time forecast data of T213 in the prediction model .

针对强对流天气将历史样本天气分为西北气流型、槽区型、西风气流型和西南气流型等4个类型，并建立其HLAFS资料400hPa四种特征场，按照模板匹配的原理，用相似分析方法在大、小两个关键区中对实时HLAFS预报产品进行计算、比较，再建立预报方程，得出结论；对沙尘暴天气将其按区域分为全区、西部、中部、中西部以及中东部5类，再按强弱分别分为强和一般2类，建立ECMWF的3个场(500hPa高度场、850hPa温度场和海平面气压场)的历史资料库，在用传真资料消空之后，用相似离度方法计算实时ECMWF资料，做出不同时次的预报；对降水天气按出现时间和区域分为适合和不适合飞机增雨作业2类，选择T106资料中恰当的气象物理量因子，用BP神经网络算法建立人工增雨降水预报模型，实际应用中将实时T213相关预报资料代入预报模型即可。

The function always enhances southerlies and brings heavy rainfall and more latent heating over tropical land to southeast of the Tibet , prevail northerlies , less rainfall and more sensible heating over tropical land to southwest of the Tibet .

结果表明，青藏高原的&热力滑轮&作用引起：高原东南面热带陆地上空的偏南气流加强，降水增加，凝结潜热加强；高原西南面热带陆地上空出现偏北气流，降水减弱，陆面的感热加热加强。

In the cloud body,the supercooled water content is low(0.035g/m3), and its distribution is not even.

此类降水是山东春季降水系统中的主要过程，具有一定的代表性。

Based on review of the main progresses in precipitation extremes under the background of global wanning, this study discusses the character of change in precipitation extremes.

回顾了气候变化背景下的极端降水事件变化观测研究的主要进展，结合全球变化的特点，重点讨论了中国极端降水事件的变化特征。

Basing on the Doppler reflectivity map, the entire precipitation rain bands were apparent westward rotation process. And basing on Doppler radial velocity map, the configuration of low-level convergence with high-level divergence is conducive to the precipitation occurrence and development. The rainstorm resulted from the cloud band maintaining over the rainfall zone.

从多普勒反射率因子图上，整个降水雨带为明显的旋转西进过程；多普勒径向速度图上，低层辐合高层辐散的配置有利于降水的发生发展，暴雨是长时间维持在其上空的强降雨云带造成的。

And also introduce the basic theory of dewatering of confined water and the processing method of the gutter drainage and well point precipitation.

本文中介绍了承压水降水的基本理论和明沟排水与井点降水等处理方法，以及各种方法的优缺点和适用条件。

These bryophytes, in this sense, have to tolerate great heat and drought.

在干旱和半干旱地区，影响苔藓植物分布的环境因子包括降水、p H值、Ca CO3 含量、植被盖度、有机质含量以及土壤质地等，其中起重要作用的是降水。

More than a half of the large city stations experienced a more obvious change of the extreme precipitation than the surrounding stations.

利用中国753个台站1951～2005年的逐日降水资料，初步分析了人口在一百万以上的大城市极端强降水事件的变化特征及其与周围的区别。

We defined a mixing scanned plane according to objective reality of Guilin , graded the intensity of Radar echo , statistics by meads of optimization method,the coefficient of A and b of Z～I relation were obtained.

根据桂林的实际定义混合扫描面，采用降水回波强度分级，用最优化方法统计Z～I关系中的A、b系数，定量测量降水能力得到了明显的提高，比用天气系统分类确立的Z～I关系准确率提高了20%，比直接应用美国提供的Z～I关系准确率提高近40%。

Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严，以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆，把帆卷起，系住。