Mapping 20 years of irrigated croplands in China using MODIS and statistics and existing irrigation products.

ABSTRACT: As a routine agricultural practice, irrigation is fundamental to protect crops from water scarcity and ensure food security in China. However, consistent and reliable maps about the spatial distribution and extent of irrigated croplands are still unavailable, impeding water resource management and agricultural planning. Here, we produced annual 500-m irrigated cropland maps across China for 2000-2019, using a two-step strategy that integrated statistics, remote sensing, and existing irrigation products into a hybrid irrigation dataset. First, we generated intermediate irrigation maps (MIrAD-GI) by fusing the MODIS-derived greenness index and statistical data. Second, we collected all existing available irrigation maps over China and integrated them with MIrAD-GI into an improved series of

SUBMITTER: Zhang C 

PROVIDER: S-EPMC9287319 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature