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首页> 外文期刊>Journal of the American Water Resources Association >RECLAIMED MINELAND CURVE NUMBER RESPONSE TO TEMPORAL DISTRIBUTION OF RAINFALL
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RECLAIMED MINELAND CURVE NUMBER RESPONSE TO TEMPORAL DISTRIBUTION OF RAINFALL

机译：要求的雷区曲线数对降雨的时间分布的响应

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摘要

The curve number (CN) method is a common technique to estimate runoff volume, and it is widely used in coal mining operations such as those in the Appalachian region of Kentucky. However, very little CN data are available for watersheds disturbed by surface mining and then reclaimed using traditional techniques. Furthermore, as the CN method does not readily account for variations in infiltration rates due to varying rainfall distributions, the selection of a single CN value to encompass all temporal rainfall distributions could lead engineers to substantially under- or over-size water detention structures used in mining operations or other land uses such as development. Using rainfall and runoff data from a surface coal mine located in the Cumberland Plateau of eastern Kentucky, CNs were computed for conventionally reclaimed lands. The effects of temporal rainfall distributions on CNs was also examined by classifying storms as intense, steady, multi-interval intense, or multi-interval steady. Results indicate that CNs for such reclaimed lands ranged from 62 to 94 with a mean value of 85. Temporal rainfall distributions were also shown to significantly affect CN values with intense storms having significantly higher CNs than multi-interval storms. These results indicate that a period of recovery is present between rainfall bursts of a multi-interval storm that allows depressional storage and infiltration rates to rebound.
机译：曲线数（CN）法是估算径流量的一种常用技术，广泛用于诸如肯塔基州阿巴拉契亚地区的煤矿开采作业。但是，很少有CN数据可用于受地表开采干扰的流域，然后使用传统技术进行回收。此外，由于CN方法无法轻松解决因降雨分布变化而导致的入渗率变化，因此选择单个CN值来涵盖所有时间降雨分布可能会导致工程师使用尺寸或尺寸过大的蓄水结构采矿作业或其他土地用途（例如开发）。利用位于肯塔基州东部坎伯兰高原的露天煤矿的降雨和径流数据，计算了常规开垦土地的氯化萘。还通过将风暴分类为强，稳定，多间隔强或多间隔稳定来检验时间降雨分布对中枢神经的影响。结果表明，这些开垦土地的氯化萘范围从62到94，平均值为85。在强风暴中，氯化萘比多间隔风暴要高得多的时间降雨分布也显示出对氯化萘值的显着影响。这些结果表明，在多间隔风暴的暴雨爆发之间存在一个恢复期，这使得depression陷和入渗速率回升。

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    Richard C. Warner; Carmen T. Agouridis; Page T. Vingralek; Alex W. Fogle;

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    Department of Biosystems and Agricultural Engineering, University of Kentucky, 128 C.E. Barnhart Bldg., Lexington, Kentucky 40546-0276;

    rnDepartment of Biosystems and Agricultural Engineering, University of Kentucky, 128 C.E. Barnhart Bldg., Lexington, Kentucky 40546-0276;

    rnDepartment of Biosystems and Agricultural Engineering, University of Kentucky, 128 C.E. Barnhart Bldg., Lexington, Kentucky 40546-0276;

    rnKentucky Geological Survey/Department of Biosystems and Agricultural Engineering, University of Kentucky, 128 C.E. Barnhart Bldg., Lexington, Kentucky 40546-0276;

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