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首页> 外文期刊>Journal of Hydraulic Engineering >Regional Streamflow Estimation by Standard Regional Dependence Function Approach
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Regional Streamflow Estimation by Standard Regional Dependence Function Approach

机译：基于标准区域依赖函数法的区域流量估算

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摘要

The main purpose of this paper is to propose a standard regional dependence function (SRDF) based on concepts of semivariogram and especially point cumulative semivariogram for regional streamflow estimation. The SRDFs are obtained from available spatial data and show regional dependence, which decreases with distance from a given site. These functions present quantitatively the regional dependence of the streamflow phenomenon recorded at irregular sites over a drainage basin and provide a unique opportunity for the establishment of regional objective estimation method based on weighed averages. The weightings are obtained by means of the SRDF given the distance between any two sites. The implementation of the proposed methodology is presented for some streamflow records from the Lower and Upper Mississippi River watershed in the United States. For the application, the experimental SRDF forms are first obtained from the available data, and these are then employed directly in the regional estimation procedure. The study indicated that the use of all the stations in a region for the estimation at any particular station is rather naieve because far away stations (more than 1,000 km away) are taken into consideration. The final conclusion is that discharge at any particular station is better described as a function of discharge at several (3-5) closest stations. The reliability of the method is measured through the cross validation procedure, and it is observed that the procedure yields streamflow predictions with less than 10% relative error.
机译：本文的主要目的是基于半变异函数的概念，特别是点累积半变异函数的概念，提出一种标准的区域依赖函数（SRDF），用于区域流量估计。 SRDF是从可用的空间数据中获得的，并显示出区域依赖性，该依赖性随与给定站点的距离而减小。这些函数定量地反映了流域上不规则地点记录的水流现象的区域依赖性，并为建立基于加权平均值的区域客观估计方法提供了独特的机会。给定任意两个站点之间的距离，可以通过SRDF获得权重。针对美国密西西比河下游流域和上游密西西比河流域的一些流量记录，提出了所建议方法的实施方案。对于应用，首先从可用数据中获得实验性SRDF表格，然后将其直接用于区域估计程序中。研究表明，将某个地区中的所有站点用于任何特定站点的估计都非常幼稚，因为考虑了远处的站点（超过1000公里）。最终结论是，可以将任何特定工位的流量更好地描述为几个（3-5个）最近工位的流量的函数。该方法的可靠性通过交叉验证程序进行了测量，并且可以观察到该程序产生的流量预测相对误差小于10％。

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