School of Geography

Research Impact

The School of Geography generates high-impact research which informs government public policy, private enterprise and third sector organisations, as well as inter-government organisations at the local, national and international levels.

Featured research impact summary

A river runs through it


The issue

Costa Rica is home to an abundance of wildlife, with protected rainforests and wetlands that make it one of the most biodiverse countries in the world. But when a territorial dispute threatened the safety of endangered species, Costa Rica took its case all the way to the International Court of Justice – calling on Professor Colin Thorne as a key witness.

The Central American country’s border dispute with neighbouring Nicaragua dated back to 1858, souring relations between the two nations for more than a century and a half and periodically flaring into armed conflict. It flared up again in 2010 when Nicaragua’s army occupied part of Costa Rica and oversaw work intended to change the course of the Rio San Juan, which marks the border.

There was no question of Costa Rica regaining control of the occupied territory by force because Nicaragua has a well-equipped army, while Costa Rica has only border police, having disbanded its army in 1947. The country’s only recourse was to rely on international law as adjudicated by the UN-backed International Court of Justice (ICJ).

The research

Costa Rica chose Professor Thorne, who composed a scientific research programme to build the evidence base necessary to inform the court on cartographic, fluvial and environmental issues underpinning the legality and impacts of Nicaragua and Costa Rica’s actions. He then led a team of Costa Rican technical specialists in collecting and collating technical and scientific data, carried out fieldwork and presented all the evidence to the court.

The impact

After a lengthy legal process, the ICJ ruled that Nicaragua had violated Costa Rica’s territorial sovereignty by occupying land on the Costa Rican side of the river. Such was the severity of the environmental harm, which involved clearing several hectares of rainforest and excavating wetlands protected under international convention, that for the first time in its history the court imposed damages on the offending nation.

Nicaragua accepted the Court’s rulings against it and paid $378,000 in damages to Costa Rica.

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