摘要
在GIS、RS技术支持下,分析了景电灌区1973年、1987年、2003年和2014年土地利用变化。结果表明:(1)土地利用类型总的变化趋势为草地、戈壁、沙地和盐碱地面积减少;耕地、林地、居民点面积增加,景电灌区的景观基质由1987年的戈壁变为2014年的耕地。(2)盐渍化土地整体所占比例较小且其面积逐年减小。但在绿洲内部,本来是耕地的区域却逐步变成盐渍地,而这种变化趋势随灌区建成逐年加剧,盐渍化对区域社会经济造成的危害也在逐年增加。
Based on GIS, RS technical support, land use change in Jingdian Irrigation Area in 1973, 1987, 2003 and 2014 are analyzed. The results show that： ① In the study period, grassland, desert, sandy and saline area decreased, while the arable land, woodland, residential area increased. In Jingdian Irrigation Area, the Gobi was the landscape matrix in 1987, and in 2014 it was the arable land. ②Influenced by farmland salinization process, although the salinization area is small and gradually decreases, salinization hazard for regional social economy is increasing anually.
作者
张忠
周兰萍
魏怀东
陈芳
ZHANG Zhong ZHOU Lan-ping WEI Huai-dong CHEN Fang(State Key Laboratory Breeding Base of Desertifieation and Aeolian Sand Disaster Combating, Lanzhou 730070, China Gansu Minqin National Studies Station for Desert Steppe Ecosystem, Lanzhou 730070, China Gansu Desert Control Resesreh Institiute, Wuwei 733000, Gansu Province, China)
出处
《中国农村水利水电》
北大核心
2017年第3期217-220,共4页
China Rural Water and Hydropower
基金
国家自然科学基金项目(51279064
51579102)
甘肃省省青年科技基金计划(1308RJYA095)
关键词
景电灌区
土地利用变化
盐渍化
Jingdian Irrigation Area
Land use change
salinization
