Open AccessAnalysis of spatial-temporal evolution characteristics of abandoned cropland in Yunnan Province based on multitemporal MODIS global land cover product
Author(s) -
Wenjuan Xiao,
J. S. Wang,
Ying-Chieh Liu
Publication year - 2019
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/346/1/012077
Subject(s) - geography , land cover , physical geography , plateau (mathematics) , land use , abandonment (legal) , environmental science , ecology , mathematical analysis , political science , law , mathematics , biology
With the outflow of rural labour forces, the abandonment of cropland is widespread, which seriously affects food security. Obtaining the spatial and temporal evolution characteristics of abandoned cropland is particularly important for formulating cultivated land protection policies and the land transfer measures. However, Yunnan province lacks the data sets of space-time distribution of abandoned land. In order to enrich the data of abandoned cropland in Yunnan province and grasp its spatial-temporal evolution characteristics to manage abandoned cropland more conveniently. Based on MODIS global land cover products and by applying the method of change detection, we have already obtained the dataset of the abandoned land in Yunnan province. Also, analysed the evolution characteristics with gravitational center computation. The result shows that the average abandoned cropland is 1284 km 2 every year, among which 2003 witnessed the least abandoned cropland, which was 582.94 km 2 and 2011 witnessed the most abandoned land, which was 1961.21 km 2 . It is found that the changes fluctuate obviously. The abandoned cropland is mainly distributed in the eastern plateau area of the study area. And the gravity of abandoned land shifted from Northwest Kunming to the border of Kunming city, Chuxiong and Yuxi city. But it located in Yuxi most years.