Lake Nemrut on the southern slope of the caldera in 2007. The main thread in terms of ecology is overgrazing. Lake Nemrut Lake Nemrut () is a freshwater crater lake in Bitlis Province, eastern Turkey. It is part of Nemrut Caldera (), a volcanic caldera atop Volcano Nemrut. The caldera is a registered natural monument and the wetlandsis registered as a Ramsar site of the country. The caldera is located west of Lake Van in the Tatvan, Ahlat and Güroymak districts of Bitlis Province. It is named after the biblical figure King Nimrod. The caldera is far from Tatvan, and from Ahlat.
Nemrut (volcano) average is 6–8 °C warmer than expected for a lake of its altitude. Nevertheless, it partly freezes in winter because of the small size and depth. Recent studies note the danger of possible eruptions. Nemrut is located in close proximity to Tatvan (distance 10 km, population: 66,000), Bitlis (population 52,000), Ahlat (population 22,000), and a number of smaller settlements. In total, about 135,000 people live in the potential eruption zone. The presence of more than 1 km of water in the caldera adds a risk of flooding, which may destroy Güroymak, a town of 15,000 people. The climate of the