Coal pit lakes in abandoned mining areas in León (NW Spain): characteristics and geoecological signicance José María Redondo-Vega Universidad de León: Universidad de Leon Adrián Melón-Nava Universidad de León: Universidad de Leon Sergio Alberto Peña-Pérez Universidad de León: Universidad de Leon Javier Santos-González (
[email protected] ) Universidad de León: Universidad de Leon https://orcid.org/0000-0002-5567-653X Amelia Gómez-Villar Universidad de León: Universidad de Leon Rosa Blanca González-Gutiérrez Universidad de León: Universidad de Leon Research Article Keywords: coal pit lakes, morphometry, open pit mining, León province Posted Date: July 31st, 2021 DOI: https://doi.org/10.21203/rs.3.rs-714446/v1 License: This work is licensed under a Creative Commons Attribution 4.0 International License. Read Full License Loading [MathJax]/jax/output/CommonHTML/fonts/TeX/fontdata.js Page 1/17 Abstract Mining activity introduces severe changes in landscapes and, subsequently, in land uses. One of the most singular changes is the existence of pit lakes, which occur in active and, more frequently, abandoned mines. Pit lakes are produced by water table interception when open-pit mines deepen. Their characteristics are highly variable, depending on the type of mine, the environment or the climate. In León province there is a long tradition of coal mining that dates back to the 19th century, and hundreds of open pits from the 1970s to 2018 have been opened, producing permanent landscape changes. This work analyses the main parameters, including morphological measurements, depth and pH values obtained from aerial photos and eld work, of 76 coal pit lakes more than 30 m in length.