Kosovo's geography: a small country whose water leaves in three directions

Where it sits

Kosovo is landlocked and sits in the centre of the Balkan Peninsula, enclosed by Montenegro to the west, Serbia to the north and east, North Macedonia to the south and Albania to the southwest.

The Albanian border runs 113.551 kilometres along the southwestern edge and is marked substantially by the Albanian Alps, which is to say that the boundary follows a mountain range rather than crossing open ground.

At 10,909 square kilometres, this is a small territory by any measure, and it is surrounded on all four sides by higher ground belonging to somebody else.

What the mountains do

Most of the country is mountainous and hilly, and the ranges are arranged around the edges rather than through the middle.

The Bjeshkët e Nemuna, the Albanian Alps, dominate the western edge and carry the country's highest ground, Gjeravica at 2,656 metres. The Sharr Mountains define the southern and southeastern edge. The Kopaonik Mountains extend along the northern edge and continue into central Serbia.

Together those two western and southern ranges are described as the most defining feature of the country's landform, and the two national parks established to protect them, Bjeshkët e Nemuna National Park and Sharr Mountains National Park, cover the most important vegetation regions in the territory.

The Kopaonik range carries something else. It is characterised by mineral wealth, particularly lead and zinc, which puts one of the country's principal economic assets in the range along its northern border.

The country also holds karst ground, which is why it has the spring types it does: limestone dissolves, so water moves through the rock as well as over it, producing karst springs alongside the thermal and mineral ones. The Field of Blackbirds, the plain in the east that gave the country its name, is itself a karst field.

What that produces is a basin: a country whose interior is lower ground enclosed by mountains on three or four sides, with the passes and river valleys through them as the only routes in and out.

Where the water goes

This is the most unusual thing about Kosovo's geography and it is worth stating precisely.

The country is described as rich in water sources, with many rivers of varying length and both natural and artificial lakes. Most of the rivers that rise in Kosovo have their mouths outside it.

The drainage divides three ways:

A country of ten thousand square kilometres supplying three separate seas is sitting on a continental watershed, and this one sits on the Balkan divide in the same way Switzerland sits on the western European one.

The Nerodime takes it further. It is the only instance in Europe of a river bifurcation flowing into two seas, the Black and the Aegean. The split is regarded as artificial, created under natural conditions that were extremely favourable to it, which is a precise way of saying that somebody made a small intervention on ground where the divide was already almost level.

Why the divide matters so much

A country this small sitting on a continental divide has consequences that a larger country in the same position would absorb.

Every river worth the name leaves. That means the water Kosovo uses is water in transit, and the territory can do with it ends at its own borders, which for most of these rivers is the upper stretch. An upstream position on a river that reaches the Adriatic is a relationship with Albania; on one that reaches the Black Sea, a relationship with Serbia; on one that reaches the Aegean, a relationship with North Macedonia.

The same fact runs the other way for anything arriving. Very little water enters Kosovo from elsewhere, because the surrounding mountains are the divide. The country is at the top of its own catchments and has no upstream neighbour to negotiate with, which is an unusual position for a small landlocked state and a favourable one.

What follows is that the country's water security is largely internal and its water diplomacy is entirely external. The reservoirs described below exist because storage is the only way to hold water in a place where the rivers are leaving.

What the lakes hold

The standing water is largely engineered, and the volumes are recorded.

Gazivoda in the northwest holds 380 million cubic metres, Radoniq in the southwest 113 million, Batllava in the northeast 40 million and Badovc, also northeastern, 26 million. Smaller lakes include Zemra, Gjeravica and Liqenat.

A number of natural lakes sit in the mountain ranges at various altitudes, among them Gjeravica, Leqinat, Jazhincë and Zemra, and the country also holds karst springs and thermal and mineral water springs.

The distribution is the point. The two largest reservoirs sit in the northwest and the southwest, which means the country's water storage is concentrated at its edges, in the higher ground, near the borders. Water infrastructure and boundary questions are therefore the same subject here, which is not the case in most countries.

What the basin does for farming

The enclosed lower ground is where the country's agriculture and most of its population sit, and its qualities follow from the ranges around it.

Mountains on three or four sides collect precipitation on the high ground and deliver it into the basin as rivers and springs, so the interior receives water it did not catch itself. The valley floors carry the alluvium that those rivers have brought down over a long period. And the same rim that supplies the water shelters the basin from the worst of the weather crossing the peninsula.

That combination, water arriving from higher ground, soil deposited by the rivers carrying it, and a degree of shelter, is the standard recipe for a productive basin, and it explains why this particular ten thousand square kilometres has been worth contesting for as long as the record runs.

It also concentrates everything. In a country where the usable ground is a single enclosed lowland, the farmland, the towns, the roads and the population sit in the same place, and there is no second region to fall back on.

What a border along a range means

Three of Kosovo's four boundaries follow high ground, and that has practical consequences beyond the political ones.

A frontier running along a mountain crest is easy to describe and hard to cross, which is why the Albanian border is quoted to three decimal places at 113.551 kilometres while remaining, in practice, a line through the Albanian Alps. Movement between the two countries follows a small number of passes and valleys.

The northern boundary behaves differently. The Kopaonik range continues into central Serbia rather than ending at the line, so the border there cuts across a continuous landform instead of following its crest. A boundary drawn across a range rather than along it separates ground that belongs together geologically, which is why the mineral deposits described above sit on both sides of it.

The eastern approach is the open one. The Field of Blackbirds and the lower ground around it face towards Serbia across terrain that puts up less resistance than the western and southern rims, and every account of movement into or out of this territory over six centuries reflects that asymmetry.

A small country with three defensible edges and one open one has a predictable strategic history, and the direction of the opening has not changed.

How the climate behaves

Kosovo's climate is set by its position in southeastern Europe and is strongly influenced by the seas to the west, south and east, producing a combination rather than a single type.

The practical consequence of sitting in a mountain-ringed basin at this latitude is continental weather in the interior with maritime influence reaching in through the valleys. Winters in the basin are colder than the latitude suggests, because the surrounding high ground traps cold air; summers are warm. The mountains hold snow well into the year and carry the country's water storage as much as its reservoirs do.

The contrast across short distances is sharp for a territory this small. The high western and southern ranges, the interior basin and the river valleys running out through the mountains are three different environments inside a country a person could drive across in an afternoon.

The three rims differ in age and composition, and the differences show up in what each is used for.

The Albanian Alps on the western edge are the highest and the most rugged, carrying Gjeravica at 2,656 metres and the country's most extensive protected landscape. Their value is water and biodiversity rather than extraction, which is why a national park sits there.

The Sharr Mountains on the southern and southeastern edge do the same job at slightly lower elevation, and carry the second of the two national parks. Together the two ranges hold the vegetation regions the country's conservation effort is built around.

The Kopaonik range in the north is the exception. Its distinguishing feature in the record is mineral wealth, particularly lead and zinc, which makes it an industrial rather than a conservation landscape, and it continues north into Serbia rather than stopping at the boundary.

Why the terrain shaped the history

The political history described in the history article reads differently once the terrain is clear.

A basin enclosed by mountains, sitting at the centre of a peninsula, with river valleys running out to three seas, is a place that routes pass through. It is also a place that is difficult to hold from outside and difficult to defend from inside, because the high ground on every border belongs to a neighbour.

That is the physical situation underneath a territory whose ownership has been contested for six centuries. The Field of Blackbirds, where the battle of 1389 was fought, is a karst plain in the eastern part of the basin, which is to say the fighting happened on the flat ground because the flat ground is where a battle in this country can be fought.

The mineral wealth of the northern range, and the reservoirs at the northwestern and southwestern edges, are both located where the political questions are hardest, and neither location was chosen by anybody.

What the geography does not settle

The catalogue records the physical facts above and takes no position on the boundaries drawn through them.

What the geography does establish is why the boundaries are difficult in a way that is not only political. A landlocked basin whose water leaves through four neighbours, whose highest ground is on its frontiers, whose principal mineral deposits sit along one border and whose largest reservoirs sit near two others, is a territory where almost every economic question crosses a line somebody disputes.

The one part of it that belongs unambiguously to the ground rather than to any argument is the divide. Rain falling on this small country reaches the Black Sea, the Adriatic and the Aegean, and it does so regardless of what anybody recognises.