The characteristics of flood disaster evolution in the Weihe River valley are analyzed. 分析了渭河流域洪水災害的環流形勢演變特徵。
County of Gansu Province is located in the southeast, in the northern city of Tianshui, a tributary of the Weihe River gourd. 秦安縣位於甘肅省東南部，天水市北部，渭河支流葫蘆河下游。
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