老黑马河

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老黑马河 flows into 新沂河 , which it joins at N 34° 6′ 49″, E 118° 17′ 58″ at OSM node n9631244763, and there 2,330 km of total upstream flows in. load it's distributaries

老黑马河 has 2 tributaries.

• 龙潭水库溢洪道, which joins it at N 34° 8′ 12″, E 118° 18′ 44″ at OSM node n9631244782, and 4 km of total upstream flows in.
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• 阎王排涝沟, which joins it at N 34° 8′ 38″, E 118° 19′ 39″ at OSM node n12345959716, and 1 km of total upstream flows in.
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