The Sulina branch is a distributary of the river Danube that contributes to forming the Danube Delta.
The other two main branches of the Danube are the Chilia branch to the north and the Sfântu Gheorghe branch to the south. The Sulina branch starts at a bifurcation of the Tulcea distributary, at Sfântu Gheorghe, Tulcea, runs east for 71.7 km (44.6 mi), and reaches the Black Sea at the port of Sulina. Its outflow comprises about 20% of the Danube's discharge.
The Chilia branch (Romanian: Brațul Chilia; Ukrainian: Кілійське гирло, romanized: Kiliiske hyrlo) is one of three main distributary channels of the river Danube that contribute to forming the Danube Delta. Lying at the northernmost area of the delta, the distributary creates a natural border between Romania and Ukraine (see Romania-Ukraine border) and is named after the two towns carrying the same name, located across from one another on both banks: Kiliia, on the northern, Ukrainian bank and Chilia Veche (Old Chilia) on the southern, Romanian bank.
The other two main branches of the Danube are the Sulina branch and the Sfântu Gheorghe branch.
The Sfântu Gheorghe branch (Romanian: Brațul Sfântu Gheorghe; Ukrainian: Георгіївське гирло, romanized: Heorhiivske hyrlo) is a distributary of the river Danube, that contributes in forming the Danube Delta.
This is the southernmost branch of the Danube; the other two main branches are the Chilia branch and the Sulina branch. The Sfântu Gheorghe branch runs on a length of 64 kilometres (40 mi), in a southeasterly direction. Its outflow comprises about 22% of the Danube's discharge.