1. School of Urban and Environmental Engineering, Ulsan National Institute of Science and TechnologyUNIST‐gil 50Ulsan44919Republic of Korea
2. Géosciences Environnement Toulouse (GET)Univ. de Toulouse, CNRS, IRD, UPSToulouse31400France
3. Dep. of Agricultural Land Management (DALaM)P.O. Box 4195, Ban NogviengkhamXaythany District, VientianeLao People's Democratic Republic