小绥芬河,古称鄂勒欢绥芬河,位于中华人民共和国黑龙江省东部,是绥芬河左岸支流,发源于穆棱市东部穆棱镇黑松山,蜿蜒向南流经中楞、新十文字、二道沟,过十文字旅游区后进入东宁市境内,经绥阳镇和道河镇,最后于道河镇河东村东南汇入绥芬河。河长137千米,河道平均比降3.4‰,流域面积3435平方千米,年均径流量6.01亿立方米。小绥芬河是一条山溪性河流,流域内平地较少,多为山区。山体陡峻,森林繁茂,植被覆盖良好。山林中有东北虎、亚洲黑熊、野猪等动物繁衍生息。[1]
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