Study on Monitoring Method of Paddy Field Planting Area in Da'an Irrigation Area Based on GF-1 Satellite Data
Li Jianping
Ma Yanmin
Ma Yunfei
Wu Yujie
Wu Di
Ding Li
Gao Zongting
Abstract：Using GF-1 satellite data and field surveys,the dynamic monitoring of the changes in the area of improved saline-alkali paddy fields in the irrigation area of Da'an City,Jilin Province was carried out.The NDWI and NDVI values of multi-temporal GF-1 satellite data in different growth periods of rice and the decision tree analysis method were used to monitor the area of improved saline-alkali paddy fields in the Da'an irrigation area from 2017 to 2020.Finally,the remote sensing-based paddy field area was corrected by the ground quadrat data.The results show that the area of improved saline-alkali land in the Da'an irrigation area has been increasing in recent years.The paddy field areas in the Da'an irrigation area were 65.33 km2,73.50 km2,100.14 km2,and 117.87 km2 each year from 2017 to 2020,respec-tively,with the highest increase of 20.49 km2 in Liangjiazi Town of Da'an irrigation area.Based on multi-temporal GF-1 data combined with the decision tree analysis method and ground verification,the comprehensive accuracy in monitoring the improved saline-alkali paddy field area in the Da'an irrigation area can reach 89%,and the relative identification accuracy of paddy fields with a total area exceeding 0.01 km2 is above 91%.However,the monitoring accuracy for the small and scattered paddy fields is relatively low due to the impact of satellite data resolution and the special environment of saline-alkali land.
Keywords：GF-1 satellitesaline-alkali soil improvementremote sensing monitoringpaddy field area
Publication Date：2025-03-30
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：9( 45-53 )