1) Runoff Curve Number method
径流曲线指数法
2) surface runoff
径流
1.
Based on the experimental data from Guilin Irrigation Experiment Station in Guangxi Autonomous Region,the relation of rainfall utilization and surface runoff in paddy fields under different rainfall frequency and different irrigation regimes is studied;i.
对广西桂林不同降雨频率与不同灌溉方式下的降雨利用、径流量分析研究表明,晚稻降雨利用率远高于早稻;早稻在"薄、浅、湿、晒"、间歇灌溉、传统灌溉模式下降雨利用率随降雨频率的增加呈缓慢上升趋势,而晚稻节水灌溉模式下呈上凸趋势;早稻全生育期和晚稻分蘖期、拔节期径流量很大,对肥料流失产生不利影响。
2.
Being scattered among the agricultural fields,the ponds intercept surface runoff and recycle drainage water for irrigation.
六岔河流域的多数降雨径流被水塘系统截留,减少流域径流输出;在连续流过程中,流域径流峰值急剧降低。
3.
Based on 8 years locating and semilocating observation, changes of rainfall and surface runoff and the relation with rainfall and surface runoff in the typical small valley of reservoir area in Three Gorges within the Yangtze River are analyzed.
根据8年的降雨、径流定位、半定位观测,分析了三峡库区典型流域的降雨、径流变化及降雨对径流的影响。
3) run off
径流
1.
In this paper,proceeding from the study of water resources utilization of a basin,the methods and steps of establishing the stochastic models of multi-station run off are expounded,and the reliability of the models is yenned in an example.
本文从研究流域水资源出发,阐述了流域多站年、月径流随机生成模型建立的方法步骤,并用实例验证了模型的可靠性。
4) run-off
径流
1.
Application of Forests to River Run-off and Its Research;
森林对河川径流影响及其研究方法
2.
Through the analysis of factors relating to aquiferous features, contact with water, groundwater recharge, run-off, discharge and groundwater chemical characteristics, we determine the hydrogeological conditions in the NO.
通过对大南湖煤田一井田含水层特征、水力联系、地下水补给、径流与排泄及地下水化学特征等因素的分析,确定该井田水文地质条件类型,为矿床开采提供依据。
5) streamflow
径流
1.
This paper presents the process of an artificial neural network (ANN) based daily streamflow forecasting model for the Three Gorges Yichang station.
给出了用人工神经网络 (ANN)对三峡宜昌站的日径流预测模型建模的过程 ,对 ANN输入变量的选择和个数的确定以及隐藏层、输出层单元数的确定等关键技术问题进行了探讨。
2.
In order to validate the ability of AVIM to simulate streamflow, the model is applied to the Xilinhe River Basin in the Inner Mongolia.
径流在陆面模式水量平衡计算中占有重要地位,它不但与土壤水的动态变化有关,而且会影响感热,潜热等其他通量的计算结果。
6) runoff
径流
1.
Phosphorus speciation in the runoff from different land uses in the Liuchahe watershed by Chaohu Lake;
六叉河小流域不同景观结构中径流磷形态差异分析
2.
Effects of Different P Fertilizer Application Rates on Soil Nitrogen and Phosphorus Losses with Surface Runoff during Rice Season;
不同磷水平处理下水稻田磷氮径流流失研究
3.
Study on the phosphorus loss via runoff from paddy field in TaiHu Region using the large catchment area;
利用大型径流场研究太湖地区稻田磷素径流排放
参考词条
补充资料:迁移效率指数、偏好指数和差别指数
迁移效率指数、偏好指数和差别指数
迁移效率指数、偏好指数和差别指数迁移效率指数是用于测定两地间人口迁移效率的指标。它是净迁移对总迁移之比。计算公式为:EIM一摇寿纂拼又‘。。上式中,}人么夕一材方}为i、]两地净迁移人数;从少+材户为i、]两地总迁移人数;El入了为迁移效率指数。 EIM的取值范围为。至100,如某一地区的值越大,反映迁移的的影响也越大。如果计算i地区与其他一切地区之间的人口迁移效率指数EIM厂,则: }艺材。一芝Mj、}EIM汀艺。+乏M,(j笋i) 迁移偏好指数是从一个地区向另一地区的实际迁移人数与期望迁移人数之比。计算公式为:____M.___材尸2行一:一二子一一不石一二,么M“ 了厂‘.厂‘、八 }二不十二六二1 、厂厂7上式中,M“为从i地迁到j地的实际迁移量;艺材。为总的人口迁移量;尸为总人口;M尸I,j为迁移偏好指数。通过计算迁移偏好指数,可以反映各地区的相对引力。 迁移差别指数是反映具有某种特征的迁移人口与非迁移人口区别的指数。例如,专业技术人员的人数所占比重,各种文化程度人数所占比重等,以便研究人才流失和其他间题。计算公式为:M‘从IMD、一翌不丝xl。。 .义V‘ N上式中,M为迁移人数;M,为具有i特征的迁移人数;N为非迁移人数;N‘为具有i特征的非迁移人数;了八了D、为迁移差别指数。
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