Caracterización de las pérdidas por infiltración con análisis estadístico de precipitación y escurrimiento

IF 0.2 Q4 WATER RESOURCES RIBAGUA-Revista Iberoamericana del Agua Pub Date : 2016-01-01 DOI:10.1016/j.riba.2016.04.001
R. Domínguez Mora , M.L. Arganis-Juárez , E. Carrizosa Elizondo , G. Esquivel Garduño
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Abstract

In this study runoff coefficients for different return periods from statistical analysis of rainfall and runoff and from the curve number method were obtained. For this purpose about 100 basins in different places of Mexico with more than 20 years of record in the hydrometric station were analyzed besides having few alterations by the construction of waterworks, without significant storage upstream of the hydrometric station, with an estimated time of concentration, less than 12 hours and with a ratio between the average of the annual maximum daily runoff and the average of the instantaneous maximum annual runoff lower than 0.5. It was found that runoff coefficients increase with increasing rainfall in the basin, but asymptotically tend to a limit value; the slope of the basin is a very important parameter which largely determines the runoff coefficients and the Curve number method overestimates the effective rainfall runoff and, therefore, the runoff coefficient. The overestimation tends to be higher as the rainfall in the basin increases.

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用降水和径流的统计分析描述渗入损失
本文通过对降雨和径流的统计分析和曲线数法得到了不同回收期的径流系数。为此,我们分析了墨西哥各地约100个水文站记录超过20年的流域,这些流域几乎没有因水厂建设而发生变化,水文站上游没有大量蓄水量,估计集中时间小于12小时,年最大日径流量平均值与瞬时最大年径流量平均值之比小于0.5。径流系数随流域降雨量的增加而增大,但渐近趋近于一个极限值;流域坡度是一个非常重要的参数,在很大程度上决定了径流系数,曲线数法高估了有效降雨径流,从而高估了径流系数。随着流域降雨量的增加,高估值越高。
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