Abstract:

It was one of the key factors that the coupled characteristics of water-land element which was considered to affect resource environment security, conservation ecological and strengthen disaster prevention and mitigation in Hengduan Mountains, China. The coupled characteristics of water-land element had been established for agricultural production according to the characteristics of  geographical environment, water-land element in Hengduan Mountains. Furthermore, the monthly and annual time series indexes of coupled characteristics of water-land element also had been calculated by multi-source spatial data. This study showed that both the macro climate and landform were the important factors to influence the coupled characteristics of water-land element in Hengduan Mountains. Three areas with distinct differences caused by southwest monsoon, southeast monsoon and the “barrier-channel” effect of landscapes were chosen. Meanwhile, the coupled characteristics of water-land element were obviously influenced by the topographic relief, elevation, slope positions and the slope, especially. The study also founded that the coupled characteristics of waterland element with distinct differences influenced by the changing of monsoons climate, spatiotemporal water-temperature and time matching, climate-vegetation coupling effects was highest in June, compared by monthly time series. And, more remarkable, there were no distinct differences compared by annual time series of nearly 15 years. The study had revealed the spatiotemporal distribution
characteristics of coupled characteristics of water-land elements. The results contribute to optimize the land function management.