潘家口地处河北迁西县境内的潘家口水库里，有一段世上独一无二的“水下长城”奇观。建于500多年前的喜峰口、潘家口城堡是明代长城的两个重要关隘，是当时中原通往北疆和东北边陲的咽喉要道，这一带的长城共有墩台21座，敌楼160座，长约50公里。
本文以潘家口水库为分析计算实例。
An example of Panjiakuo Reservir is presented in this paper.
以潘家口水库以上流域为例，检验结果表明，该方法取得了较好的效果。
The method is tested in upstream basin of the Panjiakou reservoir and the result is good.
河北宽城满族自治县潘家口水库内的“水下长城”部分已成为高高在上的悬城。
The so-called "Great Wall Underwater" in the Panjiakou Reservoir, the Man [Manchu] Nationality Autonomous County, Kuancheng, Hebei, has been suspended highly in parts.
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