摘要
下垫面的变化对地表蒸散发有重要影响。根据遥感监测黄土高原地区2010-2015年历年逐日气温资料,采用FAO-56推荐的Penman-Monteith公式计算逐日ET,进而研究了旱区4种土地利用类型的城镇化对ET值的影响特征。结果表明:①旱地城镇化后,日均ET值呈上升趋势,水田、农村居民点、低覆盖度草地城镇化后的ET值均呈下降趋势;②在城镇化发展过程中,ET变化幅度最大的为农村居民点,最小的为水田;③原土地利用类型的植被覆盖度是影响城镇化过程中ET变化率的重要因素。
The change of underlying surface has an important impact on surface evapotranspiration.Based on the daily temperature data of the Loess Plateau from 2010 to 2015,we used Penman-Monteith formula recommended by FAO-56 to calculate daily ET,and analyzed the influence characteristics of ET on four types of urbanization.The results show that①after the urbanization of dry land,the daily ET value shows a rising trend,while that of paddy fields,rural residential areas and grassland with low coverage show a declining trend.②In the process of urbanization development,the rural residential areas have the largest ET changes,while the paddy fields have the smallest ET changes.③The vegetation coverage of the original land use type is an important reason influencing the ET change rate in the process of urbanization development.
出处
《地理空间信息》
2021年第7期68-70,I0006,共4页
Geospatial Information
基金
国家自然科学基金面上项目资助项目(51979232)。
关键词
遥感监测
ET
下垫面
城镇化
remote sensing monitoring
ET
underlying surface
urbanization
