小潢河,古作瑟水或澀水[1],位於中國河南省羅山縣境內,是竹竿河左岸支流。小潢河在石山口水庫以上有西源和南源,主源西源發源於羅山縣西南靈山北麓九龍溝,南源源自九里關大塞嶺北麓。小潢河出石山口水庫後東北流經子路鎮和羅山縣城,最後於竹竿鎮河口寨匯入竹竿河。全長98公里,流域面積796平方公里,落差514.3米。流域內多年平均年徑流量3.49億立方米,多年平均流量11.06立方米每秒。[2]
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