| Zalomka Zalomska River, Đerope, Kolješka River | |
|---|---|
 Zalomka in gorge between Gacko and Nevesinje | |
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  | |
| Location | |
| Country | Bosnia and Herzegovina |
| Municipality | Gacko, Nevesinje |
| Physical characteristics | |
| Source | |
| • location | Brajićevići |
| • coordinates | 43°13′54″N 18°29′14″E / 43.231768°N 18.487102°E |
| Mouth | |
• location | estavelle in Biograd |
• coordinates | 43°10′57″N 18°07′30″E / 43.182488°N 18.125078°E |
| Discharge | |
| • location | estavelle in Biograd, Nevesinje |
| • average | 110 m3/s (3,900 cu ft/s) |
| Basin features | |
| River system | Neretva-Trebišnjica |
| Landmarks | Ovčiji Brod bridge |
| Tributaries | |
| • left | Batuša, Markov Creek, Novaci, Jamnik, Sopiljski Creek a.k.a. "Babova pit", Zovidol River, Bukovik, Vučine |
| Waterbodies | Alagovac Lake |
| Bridges | Ovčiji Brod bridge |
The Zalomka (Serbian Cyrillic: Заломка) is a karstic river in the southern part of Bosnia and Herzegovina, and as part of the Neretva river system it is one of the largest sinking rivers in the country and Dinarides. It rises under the Morine plateau, near Brajićevići village in Gacko municipality, but also collects its upper course waters from Gatačko Polje.