Mapping the fallowed area of paddy fields on Sanjiang Plain of Northeast China to assist water security assessments

作     者：LUO Chong LIU Huan-jun FU Qiang GUAN Hai-xiang YE Qiang ZHANG Xin-le KONG Fan-chang LUO Chong;LIU Huan-jun;FU Qiang;GUAN Hai-xiang;YE Qiang;ZHANG Xin-le;KONG Fan-chang

作者机构：School of Economics and ManagementNortheast Agricultural UniversityHarbin 150030P.R.China School of Pubilc Adminstration and LawNortheast Agricultural UniversityHarbin 150030P.R.China Northeast Institute of Geography and AgroecologyChinese Academy of SciencesChangchun 130102P.R.China 

出 版 物：《Journal of Integrative Agriculture》 (农业科学学报（英文版）)

年 卷 期：2020年第19卷第7期

页      面：1885-1896页

核心收录：

学科分类：09[农学] 0901[农学-作物学] 

基　　金：supported by the National Key Research and Development Program of China (2016YFD0300604-4) the Academic Backbone Project of Northeast Agricultural University,China the Jilin Scientific and Technological Development Program,China (20170301001NY) 

主　　题：fllowed paddy fields Landsat 8 Sanjiang Plain Google Earth Engine water security 

摘      要：Rice growth requires a large amount of water,and planting rice will increase the contradiction between supply and demand of water *** field fllowing is important for the sustainable development of an agricultural region,but it remains a great challenge to accurately and quickly monitor the extent and area of fallowed paddy *** fields have unique physical features associated with paddy rice during the flooding and transplanting *** comparing the differences in phenology before and after paddy field fllowing,we proposed a phenology-based fallowed paddy field mapping *** used the Google Earth Engine(GEE)cloud computing platform and Landsat 8 images to extract the fllowed paddy field area on Sanjiang Plain of China in *** results indicated that the Landsat8,GEE,and phenology-based fllowed paddy field mapping algorithm can effectively support the mapping of fallowed paddy fields on Sanjiang Plain of *** on remote sensing monitoring,the total fallowed paddy field area of Sanjiang Plain is 91543 *** resultant fallowed paddy field map is of high accuracy,with a producer(user)accuracy of 83%(81%),based on validation using ground-truth *** Landsat-based map also exhibits high consistency with the agricultural statistical *** estimated that paddy field fallowing reduced irigation water by 384-521 million cubic meters on Sanjiang Plain in *** research results can support subsidization grants for fallowed paddy fields,the evaluation of fallowed paddy field effects and improvement in subsequent fallowed paddy field policy in the future.