The upper valley sluice and heavy rainfall runoff flood are the main two types of typical flood in Langfang;
上游泄洪及暴雨自产径流是廊坊市典型洪水的两种主要类型；
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。
Rising and falling of flood water level not only leads to the increase and decrease of underground water near the bank, but also restricts the change of runoff outflow routing.
洪水的涨落不仅引起河岸附近地下水蓄水量的增减，同时也制约着地下径流过程的变化。
The article presents a brief summary of the climate, precipitation, rainstorm, runoff, flood characteristics of Wujiang river catchment according to the related hydrology achievements.
本文结合相关水文成果，对乌江流域的气候、降水、暴雨、径流、洪水特性进行简要总结。
Annual average runoff amount and runoff amount of flood season decreased along the river.
年平均径流量与汛期径流量均呈沿程递减。
The parameters of the NAM hydrological model are researched on affecting the depth of runoff volume, flood peak flux and flood peak appearance time.
利用灰色系统关联分析方法来研究NAM模型参数对模型模拟径流深、洪峰流量和峰现时间的影响。
Soil water balance models are especially important in the prediction of flood runoff, calculation of soil moisture content, design and management of irrigation and simulation of climate impact.
土壤水分平衡模型在洪水预测、土壤湿度计算、灌溉设计管理以及全球气候变化影响的仿真分析上十分重要。
Rainwater utilization has the functions of saving water resources, alleviating flood disaster, supplementing the groundwater, controlling runoff pollution and improving urban ecological environment.
雨水利用具有节约水资源、减缓洪涝灾害、补充地下水、控制径流污染和改善城市生态环境等作用。
The function of forest averaging seasonal distribution of runoff was realized by reducing the runoff in flood season and compensationg runoff in non-flood season.
森林均化径流分配的作用通过削减汛期径流和补充非汛期流水来实现。
The main reason was that the operation effect of Danjiangkou reservoir for runoff was more in the low water period than in the flood period.
主要原因是丹江口水库的调节作用，对汉江中下游径流量的影响枯水期远远大于汛期。
This text is based on analyzing characteristics of error generation of Zhanghe reservoir flood, establishing anti-error runoff yield and concentration forecastin.
在分析漳河水库入库洪水误差特点的基础上，建立了入库洪水产汇流预报方案。
The effect of the parameters of the NAM hydrological model on the depth of runoff volume, flood peak discharge and flood peak appearance time was researched by GRA (grey relation analysis).
利用灰色系统关联分析方法来研究NAM模型参数对模型模拟径流深、洪峰流量和峰现时间的影响。
Runoff concentration can be generalized as transposition and attenuation of flood waves, which are the basis of most basin runoff concentration models.
流域汇流可以概化为洪水波的平移和坦化作用，平移和坦化模拟是大多数概念性汇流模型的核心。
Land Resource Management In River Valley and Flood Prone Areas of Himalayan Region: Land Degradation, Floods, Runoff, Sediment Yields, Soil and Water Conservation.
喜马拉雅地区流域和洪水易发地区土地资源管理：土地退化，洪水，径流，泥沙的产量，水土保持。
The designed flood peak flow in storm sewer is usually calculated by adopting a constant average runoff coefficient at present in China, simple as it is, it's not reasonable enough.
目前，我国采用单一地表的平均径流系数计算雨水管渠的设计洪峰流量，这虽然使计算简化，但不尽合理。
At last, river water level in different plan condition is calculated integrating the method of city runoff and river network hydraulics, to provide technical supports for flood-prevention projects.
进而将城市产汇流方法和河网水动力学方法相耦合，计算出在不同规划条件下的河网洪水位，以此为防洪规划工程提供技术支持。
Advances in recent 30 years in the theories of watershed runoff generation, flood wave movement in rivers, and watershed flow concentration are briefly introduced.
根据国内外文献资料，对近30年来流域产流理论、河道洪水波运动理论和流域汇流理论的新进展作了扼要介绍。
Harvest from the flood plain depends on the magnitude of the river's runoff during the flood period. Roughly once in ten years the entire flood plain would be submerged.
的庄稼收成是依赖被洪水冲走量的多少，粗略估计，每十年泛滥平原就会被淹没一次。
In view of the above mentioned facts, it is very important to develop flood forecasting and waterlogging harnessing. while rainfall-runoff calculation is the kernel to solve these problems.
因此开展洪涝预报和渍害治理至为重要，而降雨径流计算是其首要解决的问题。
Runoff yield and flood peak are larger when the rain center is near the outlet of watershed under the natural environment, but it is not necessarily under the human activities environment.
在自然条件下，降雨集中、强度大、历时短、暴雨中心靠近流域出口，洪峰流量就会比较大，反之则小，但在人类活动影响下则不一定产生这样的结果。
There are many factors that affect the runoff modulus and the variation coefficients of flood discharge and low flow, such as climate, rock, soil, land form, and so on.
影响流域洪、枯水径流模数、变差系数的因素很多，如气候、岩性、土壤、地貌等许多自然条件。
The modeling result shows that land use structure and pattern change results in the increase of maxi- mum flood peak and flood discharge and the decreases of runoff concentration time.
模拟结果表明，土地利用结构与格局的变化，使得暴雨洪水的最大洪峰流量和洪量加大，汇流时间变短。
In the 1990s, the flood water level was lower than before at most stations in the river network of the Pearl river delta under the same grade of runoff.
90年代以来，珠江三角洲网河区大部分水位站同级流量的洪水位普遍下降的同时，局部河段洪水位却异常壅高。
In the 1990s, the flood water level was lower than before at most stations in the river network of the Pearl river delta under the same grade of runoff.
90年代以来，珠江三角洲网河区大部分水位站同级流量的洪水位普遍下降的同时，局部河段洪水位却异常壅高。
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