典型黑土区作物根层土壤含水量遥感估算及影响因素研究  

Remote Sensing Estimation and Influencing Factors of Root Zone Soil Moisture of Typical Cultivated Land in Black Soil Region of Northeast China

作　　者：杭艳红[1] 宋梦宁 杜嘉[2] 刘焕军[2] 孟令华 王烁 刘琼 HANG Yanhong;SONG Mengning;DU Jia;LIU Huanjun;MENG Linghua;WANG Shuo;LIU Qiong(College of Public Administration and law,Northeast Agricultural University,Harbin 150030,China;Northeast Institute of Geography and Agricultural Ecology,Chinese Academy of Sciences,Changchun 130012,China)

机构地区：[1]东北农业大学公共管理与法学院,黑龙江哈尔滨150030 [2]中国科学院东北地理与农业生态研究所,吉林长春130012

出　　处：《遥感技术与应用》2023年第6期1328-1337,共10页Remote Sensing Technology and Application

基　　金：国家重点研发计划(2021YFD1500100)资助;王宽诚教育基金会资助。

摘　　要：漫川漫岗黑土区作物根层土壤含水量受植被覆盖、地形、土壤温度、降雨等多因素的影响,是农业生产和农田管理的关键要素。以友谊农场两个不同坡度的典型耕地地块(平耕地与等高种植坡耕地)为研究对象,利用Landsat 8遥感数据结合气象数据等驱动SEBAL(Surface Energy Balance Algorithm for Land)模型估算根层土壤含水量,利用地面实测数据对估算结果展开验证。在此基础上分析根层土壤含水量空间分布的影响因素。结果表明:①SEBAL模型估算的根层土壤含水量6月27日决定系数R2为0.85,7月13日决定系数R2为0.68,且7月13日根层土壤含水量明显高于6月27日;平耕地6月27日决定系数R2为0.65,7月13日为0.84;等高种植坡耕地6月27日决定系数为0.64,7月13日为0.50。②地块不同导致作物根层土壤含水量影响因素也不同,平耕地主要影响因素为坡度、植被覆盖度和土壤温度;等高种植坡耕地为高程和土壤温度。使用SEBAL模型可以较为快速准确地估算根层土壤含水量,研究结果对于黑土区耕地的水分管理、农业灌溉及水分运移研究具有重要意义。The root zone soil moisture of cropsin rolling hilly black soil regionis is affected by multiple factors such as vegetation cover,topography,soil temperature,and rainfall.Therefore,it is a crucial factor in agricul⁃tural production and farmland management.On two fields(flat and sloping)with different slopes in Friendship Farm,the SEBAL model was driven by Landsat-8 remote sensing data combined with meteorological data to estimate the soil water content in the root zone,and the results were validated by ground measurement data.The factors influencing the spatial distribution of soil water content in the root zone were analyzed on this basis.①The coefficient of determination of root zone soil moisture estimated by SEBAL model was 0.85 on June 27 and 0.68 on July 13,and the root zone soil moisture on July 13 was higher than that on June 27,The determina⁃tion coefficient of flat farmland was 0.654 in June 27and 0.84 on July 13;the coefficient of determination of con⁃toured slope farmland was 0.64 in June 27 and 0.50 on July 13.②The difference in the plot affects the root zone soil moisture.The main influencing factors of flat farmland were slope,vegetation coverage,and soil tempera⁃ture.The main influencing factors of contoured slope farmland were elevation and vegetation coverage.There⁃fore,The SEBAL model can estimate the root zone soil moisture.The research results are of great significance for the research on water management,agricultural irrigation and water transport of cultivated land in black soil area.

关 键 词：根层土壤含水量 SEBAL模型 平耕地 等高种植坡耕地 Landsat 8 

分 类 号：S127[农业科学—农业基础科学]