1. College of Mathematical ScienceTianjin Normal University Tianjin China
2. Laboratoire Hydrosciences MontpellierUMR 5569‐CNRS‐UM‐IRD Montpellier France
3. Tianjin Key Laboratory of Water Resources and EnvironmentTianjin Normal University Tianjin China
4. UniRouen‐UniCaen‐CNRSNormandy University Rouen France
5. Department of Hydrology and Water ResourcesUniversity of Arizona Tucson Arizona USA
6. Geological Survey of JapanAIST Tsukuba, Ibaraki Japan