Anthropogenic influence on the state of Lake Shalkar in Western KazakhstanAkzhbek Bulekova, Elmira Akkereeva, Zhaukazin Sharafieva, Sandugash Sungatkyzy and Zarina TulegalievaE3S Web Conf., 494 (2024) 04013DOI: https://doi.org/10.1051/e3sconf/202449404013