基于GEE和Sentinel-2影像的建始县烟区冰雹灾害风险区划  

Risk zoning of hail disaster in tobacco area of Jianshi County based on GEE and Sentinel-2 images

作　　者：郑翔天 罗菊英 汪川乂 谭艳立 刘乔 万君[2] ZHENG Xiang-tian;LUO Ju-ying;WANG Chuan-yi;TAN Yan-li;LIU Qiao;WAN Jun(Meteorological Bureau of Enshi Autonomous Prefecture,Enshi 445000,Hubei,China;Wuhan Regional Climate Center,Wuhan 430074,China)

机构地区：[1]湖北省恩施土家族苗族自治州气象局,湖北恩施445000 [2]武汉区域气候中心,武汉430074

出　　处：《湖北农业科学》2024年第8期182-187,共6页Hubei Agricultural Sciences

基　　金：湖北省烟草公司重点科技项目(027Y2021-020,027Y2021-021);恩施州气象局科技项目(202005)。

摘　　要：选用建始县2021年Sentinel-2遥感影像资料,基于Google Earth Engine(GEE)云平台计算植被覆盖指数(NDVI)、归一化水体指数(NDWI)以及归一化建筑指数(NDBI)等参数,采用随机森林算法将建始县划分为水域、林地、建设用地、耕地、烟叶5类,并结合建始县气象灾害风险普查成果,建立了建始县烟区冰雹灾害风险区划模型,对烟叶遭受的冰雹灾害风险等级进行评估。结果表明,建始县烟草种植区域主要分布于官店镇中西部、花坪镇大部及高坪镇至茅田一线,大部分处于烟区冰雹灾害风险次低至中风险地区,需加强监测预警,及时开展人工防雹作业;中部长梁乡、三里乡、高坪镇南部地区冰雹灾害风险等级低,可适当增加烟叶种植面积;建始县东北部及南部山区冰雹灾害风险等级较高,需要加强灾害防御,适当减少烟叶种植。本研究结果作为2022年恩施州灾害风险普查成果典型案例应用于实际业务中,为烟叶种植生产以及气象防灾减灾提供了较好参考依据。Sentinel-2 remote sensing images of Jianshi County in 2021 were selected,and based on GEE cloud platform,the parame⁃ters of NDVI,NDWI and NDBI were calculated.The random forest method was used to divide Jianshi County into five categories:wa⁃ter area,forest land,construction land,cultivated land and tobacco leaf.Combined with the results of the meteorological disaster risk survey in Jianshi County,the tobacco hail disaster risk regionalization model was established,and the risk grade of tobacco leaves sub⁃jected to hail disaster was evaluated.The results showed that the tobacco planting areas in Jianshi County were mainly distributed in the central and western parts of Guandian Town,most of Huaping Town,and the line from Gaoping Town to Maotian.Most of them were located in areas with low to medium risk of hail disasters in the tobacco growing areas.It was necessary to strengthen monitoring and early warning,and timely carry out artificial hail prevention operations.The risk level of hail disasters was low in the southern ar⁃eas of Liangxiang,Sanli Township,and Gaoping Town,and the tobacco planting area could be appropriately increased.The risk level of hail disasters in the northeast and southern mountainous areas of Jianshi County was relatively high,and it was necessary to strength⁃en disaster prevention and appropriately reduce tobacco planting.The results of this study,as a typical case of the 2022 Enshi Prefec⁃ture disaster risk survey,had been applied in practical business,providing a good reference basis for tobacco planting production and meteorological disaster prevention and reduction.

关 键 词：遥感信息提取 GEE 烟叶 冰雹风险区划 建始县 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]