supported by the National Natural Science Foundation of China(41977258);the China Geological Survey(DD20190310,DD20221761);the National Key R&D Program of China(2018YFC1504704).
The Luan River is the most important water system in north-eastern Hebei Province,China and is located in the transitional zone of the Eastern Yan Mountains,North China Plain and Songliao Plain.The well-developed rive...