Key Laboratory of Western China's Environmental Systems (Ministry of Education) and Key Laboratory for Environmental Pollution Prediction and Control Gansu Province College of Earth and Environmental Sciences Lanzhou University Lanzhou 730000 China;
Academy of Economics and Environmental Sciences Xichang University Xichang 615000 China;
Key Laboratory of Western China's Environmental Systems (Ministry of Education) and Key Laboratory for Environmental Pollution Prediction and Control Gansu Province College of Earth and Environmental Sciences Lanzhou University Lanzhou 730000 China;
Key Laboratory of Western China's Environmental Systems (Ministry of Education) and Key Laboratory for Environmental Pollution Prediction and Control Gansu Province College of Earth and Environmental Sciences Lanzhou University Lanzhou 730000 China;
Key Laboratory of Western China's Environmental Systems (Ministry of Education) and Key Laboratory for Environmental Pollution Prediction and Control Gansu Province College of Earth and Environmental Sciences Lanzhou University Lanzhou 730000 China;
Key Laboratory of Western China's Environmental Systems (Ministry of Education) and Key Laboratory for Environmental Pollution Prediction and Control Gansu Province College of Earth and Environmental Sciences Lanzhou University Lanzhou 730000 China;
Academy of Economics and Environmental Sciences Xichang University Xichang 615000 China;
