Abstract:

To analyze the spatial pattern of land-use and characteristics of land resources in Danjiangkou water-level-fluctuating zone, land-use status quo is monitored through remote sensing based on 0.5 m Digital Orthphoto Map in the reservoir area acquired through unmanned aerial vehicle by 2013 before impoundment of the reservoir area. Moreover, the characteristics of land-use status are studied using spatial analysis and geostatistical methods in association with administrative map, slope map and 150 m, 160 m, 163.5 m, 170m water flooding lines extracted from 1∶50 000 Digital Elevation Model. Results show that the areas of water-level-fluctuating zone are 227.1 km² and 194.3 km² at elevation 150-160 m and 160-170 m, respectively. Water-level-fluctuating zones are mainly distributed in Xichuan, Danjiangkou and Yunxian County. Arable land is the main land form in the fluctuating zone and is mainly distributed in Xichuan. The monitoring results provide a data basis for the management of Danjiangkou water-level-fluctuating zone.

Key words: Danjiangkou Reservoir, water-level-fluctuating zone, land-use, spatial and geostatistical analysis, UAV remote sensing