energies Article Sustainable Rehabilitation of Surface Coal Mining Areas: The Case of Greek Lignite Mines Francis Pavloudakis 1, Christos Roumpos 1,* , Evangelos Karlopoulos 2 and Nikolaos Koukouzas 2 1 Mining Engineering Department, Public Power Corporation, 104 32 Athens, Greece;
[email protected] 2 Research Department, Chemical Process & Energy Resources Institute, Centre for Research & Technology Hellas, 15125 Athens, Greece;
[email protected] (E.K.);
[email protected] (N.K.) * Correspondence:
[email protected]; Tel.: +30-697-979-9291 Received: 2 July 2020; Accepted: 31 July 2020; Published: 3 August 2020 Abstract: Surface lignite mines of the Balkan Peninsula face growing pressure due to the CO2 emissions reduction initiatives, rapidly increasing renewable-power capacity, and cheap natural gas. In this frame, the development of a modern mine land rehabilitation strategy is considered as a prerequisite for mitigating the social and economic impacts for the local communities. In the case of western Macedonia lignite mines, these prospects are investigated based on a PEST (political, economic, social, technological) analysis of seven alternative land uses. Urban (industrial) development, green houses, and industrial heritage parks are considered as the most appropriate land uses for mitigating the socioeconomic impacts due to the loss of employments. For the land uses occupying large areas (i.e., agriculture, forestry, livestock farming, and photovoltaic parks), an optimisation algorithm is proposed for determining the mix of land uses that maximise revenue, equity, and natural conservation and minimise investment. The algorithm was applied using the opinions of 10 experts, who were involved in mine land reclamation projects carried out in the western Macedonia region in the recent past.