摘要
引黄灌溉是维持内蒙古河套灌区农业生态稳定的重要保障,对年灌溉面积定量估测是在引黄水量限制条件下调整种植结构和规模的主要依据。基于2000-2018年4月1日至5月31日和9月15日至11月15日的MODIS逐日有效数据及野外实测阈值,应用ArcGIS估算了河套灌区近20年来春、秋引黄灌溉面积。研究表明:(1)引黄灌溉面积变化趋势在不同季节具有显著差异,春灌面积以2008年为分界点分平稳波动和迅速升高个阶段,而秋灌面积在2000-2018年间面积呈减少趋势,与春灌相比变化幅度小,变异系数为13.1%;(2)在典型年份中,义长和乌拉特灌域春、秋灌溉面积范围大,沈乌灌域灌溉面积小,均不超过15000 hm 2,永济灌域以秋灌为主,春灌分布最少。
Irrigation from Yellow River is great important for maintaining the stability of agro-ecological system in Hetao irrigation district.The estimation of the annual irrigation area from Yellow River is helpful to adjust planting structure and scale under water limitation.We estimated the irrigation area from Yellow River in spring,autumn and whole year of the Hetao irrigation district within nearly 20 years based on MODIS valid record everyday from April 1 to May 31 and September 15 to November 15 of 2000-2018 and field measurement in this paper.The threshold value of reflectance spectrum of water,vegetation,and bare land were measured and then the values were analyzed through the surface information extracting,spatial overlay analysis and statistical algorithms supported by ArcGIS software.The results showed that(1)the irrigation area was significantly difference in different seasons.more specifically,in spring,it is fluctuated steadily before 2008 and rose rapidly after 2008;while,in autumn the irrigation area decreased from 2000 to 2018,with a small change range compared with that in spring,and the coefficient of variation was 13.1%;(2)in three typical years,the irrigation areas both spring and autumn in Yichang and Urat was larger and Shenwu was less,less than 15000 hm 2.The investigation also found that Yongji district was mainly irrigated in autumn,less in spring.
作者
王理想
蔡明玉
白雪莲
季树新
贾飚
冯学武
常学礼
WANG Li-xiang;CAI Ming-yu;BAI Xue-lian;JI Shu-xin;JIA Biao;FENG Xue-wu;CHANG Xue-li(School of Resources and Environmental Engineering,Ludong University,Yantai 264025,Shandong,China;Department of Automotive Engineering,Yantai Engineering and Technology College,Yantai 264000,Shandong,China;Water Conservancy Science Research Institute of Inner Mongolia,Hohhot 010051,China)
出处
《内蒙古师范大学学报（自然科学版）》
CAS
2021年第1期44-52,共9页
Journal of Inner Mongolia Normal University(Natural Science Edition)
基金
内蒙古自治区十三五水利重大专项资助项目(NSK2017-M1)。
关键词
引黄灌溉面积
遥感估测
河套地区
Yellow River irrigation area
remote sensing assessment
Hetao region
