Mapping flood extend and its impact on land use/land cover and settlements variations: a case study of Layyah District, Punjab, Pakistan - Shan-e-hyder Soomro; Caihong Hu; Muhammad Waseem Boota; Mairaj Hyder Alias Aamir Soomro; Shengqi Jian; Zeeshan Zafar; Xiaoping Li (Acta Geophysica, 2021)