When the rain is caused by cold front, cyclone or typhoon, the rainfall forecast skill is higher than warm front or subtropical high.
冷锋、气旋和台风影响下的降水预报准确率明显高于暖锋和副高影响下的降水。
With different boundary layer schemes, the simulated divergence fields differ, which affects the performance of the rainfall forecast.
不同边界层方案模拟的辐散场有一定的差别，导致了降水的不同预报效果。
The results show that this system has powerful assimilation capacity and is able to improve the accuracy of MM5 model rainfall forecast.
试验表明该系统有较强的同化能力，能够提高MM 5降水预报的准确性。
Monthly rainfall forecast is one of the short-term climate prediction operations, it is important for disaster prevention to improve the quality of forecast.
月降水量预测是短期气候预测的业务之一，提高预测质量对防灾抗灾具有重要意义。
By using statistic principles, some improvement on factors selection standard and factors pick-up from data have been made, to improve monthly rainfall forecast greatly.
运用数理统计原理，在因子选择标准和在各种资料中提取因子方面作了些探索，月降水量预测质量有了较大提高。
The risk of flood operation mainly comes from the errors of flood and rainfall forecast, in the next place, the errors comes from the decision-maker's subjective preference.
水库汛限水位动态控制中的风险主要来自洪水预报和降雨预报的误差，其次来自决策者的决策误差。
This article presents the principle of ANN briefly in the application of flood forecast and an improved network algorithm of rainfall runoff forecasting.
简要介绍了人工神经网络用于洪水预报的基本原理，对降雨径流预报的网络模型进行了改进。
The example showed that the stepwise regression model and the winter rainfall similarity method are practical in analyzing quantitatively the forecast objects.
实例研究表明，逐步回归模型、冬季降雨相似在预报对象的定量分析上较为实用。
It is a very important content of disaster prevention and reduction to describe and forecast the distribution of urban rainfall (rainstorm).
如何准确描述和预测降雨(暴雨)的空间分布，已成为城市减灾防灾的重要内容。
It is based on actual evapotranspiration capacity, effective rainfall and water reserve of soil to forecast irrigation time.
以实际蒸发蒸腾量、有效降雨量和土壤贮水量来预报未来灌水时间。
Combining strong rainfall feature, rainfall intensity can be forecast and the affected area can be confirmed based on high and new technology such as 3s and net communication technology.
结合强降雨的特征，借助3s技术以及网络通信等高新技术，可以提前预报降雨强度，确定受灾区域。
The article carefully analyzes characteristics of rainfall and find out main factor in the middle reaches of Wei River and puts forward some advice how to improve precision of flood forecast.
本文认真分析了雨水情特点，找出了渭河中游洪水主要影响因素，对如何提高洪水预报的精度提出了建议。
Two watershed hydrological models, i. e. a hydrological model considering spatial distribution of rainfall and TOPMODEL with comparatively well-developed theory are both applied to forecast flood.
在水文模型方面，分别采用一种考虑降雨空间分布的产流模型以及理论较为成熟的TOPMODEL。
This system chiefly consists of the rainfall monitor subsystem , water level monitor subsystem , reservoir professional forecast service subsystem and reservoir controlcenter.
该系统主要包括雨量监测子系统、水位监测子系统、库区专业预报服务子系统和库区控制中心四部分。
The forecast of typhoons track, intensity of rainfall and strong gale is very important.
台风的路径和风雨强度预报是台风预报服务的关键。
In order to calculate the black soil erosion thickness by slope erosion under rainfall. The mathematical model which can forecast the deforming of the slope was builded.
为了计算降雨引起的坡面黑土层侵蚀厚度，建立了坡面变形(冲刷厚度)的数学模型。
It is concluded from comparison that the flood forecast project with real-time correcting method is of higher precision and thus useful to reduce the rainfall network density.
通过与没有实时修正情况下的雨量站网规划结果相比较，具有实时修正功能的精度较高的洪水预报方案对减少雨量站网密度有较满意的效果。
By using the life time of a certain scale echo to restrict the lead time, a forecast can be made for the rainfall at this scale, and total rainfall is obtained through composing.
根据不同尺度回波生命史来约束其预报时效，得到分尺度下的降水预报场，实现暴雨回波多尺度的合成降水量临近预报；将分尺度与不分尺度降水预报结果进行了比较。
The visual display and forecast of the spatial distribution of water and rainfall information are helpful to analyze the interaction between water information and geography information.
直观表现和预见水雨情信息的空间分布状态有利于对水信息与地理信息的相互作用进行分析。
Then, via building a Measure function to represent gap between forecast-rainfall and actual-rainfall. Eventually, to take minimum of the sum of distance as evaluation function.
而后，创建了一种距离函数来表征预测与实际降雨量之间的差距，最后用距离和的最小作为评价函数。
The effect of forecast using the optimal subset regression method for the date of the first soaking rainfall is good in Ningxia.
利用最优子集回归预报法对宁夏春季首场透雨出现日期的预测具有理想的拟合效果。
In addition, local meteorological factors and local topography could be taken for factors of the reference to forecast local heavy rainfall.
另外，单站要素和本地地形是预报局地暴雨的重要参考因素。
It provides approaches to make full use of available spatial technologies and data for rainfall-runoff modeling and technical improvement of hydrological forecast.
这对充分利用现有空间技术和空间数据进行降雨-径流模拟并改进水文预报方法提供了研究途径。
The main period about 40,25,10 and 4-7 years are found. Based on this, we can forecast the lack of rainfall in Wuhan city in initial stages of this century.
指出武汉市主汛期降水存在40年、25年、10年、4—7年左右的周期振荡，并由降水的周期性推知本世纪初武汉市汛期将进入下一个少雨时段。
The main period about 40,25,10 and 4-7 years are found. Based on this, we can forecast the lack of rainfall in Wuhan city in initial stages of this century.
指出武汉市主汛期降水存在40年、25年、10年、4—7年左右的周期振荡，并由降水的周期性推知本世纪初武汉市汛期将进入下一个少雨时段。
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