摘要
【目的】确定影响民勤绿洲面积演变的主要驱动因素。【方法】基于GIS和RS技术,采用面积变化、土地利用转移矩阵等方法,定量分析了民勤绿洲面积1987-2017年的时空变化特征。【结果】①1987-2017年,民勤绿洲面积呈"平稳增加-相对稳定-急剧增加-急剧减少-迅速增加"的态势,除2012年面积明显退缩外,绿洲规模基本一直处于扩张状态,2007年绿洲面积最大,为1 359.51 km^2。②1987-1992年、1992-1999年、1999-2002年、2002-2007年、2007-2012年、2012-2017年6个时段内土地利用类型发生变化的面积分别为500.99、510.66、625.70、611.67、672.38和514.66 km^2,主要是耕地、荒漠和草地之间的转化。③水资源开发利用的程度对于绿洲的演变起到决定性因素,其次,人口数量的变化会影响人工绿洲(耕地和居工地)的演变。【结论】1987-2017年期间民勤绿洲基本呈现逐步扩张的态势,人口的增长有利于人工绿洲面积的扩大,但水资源开发利用的程度仍是影响绿洲整体演变的主要因素。
【Objective】The purpose of this paper is to determine the main driving factors which affecting its evolution.【Method】Based on GIS and RS, area change and land use transfer matrix were adopted, and analyed the characteristics of spatial and temporal changes in minqin oasis in 1987-2017.【Result】①During 1987-2017,Minqin oasis area showed a steady increase-relative stability-rapid increase-sharp decrease-rapid increase trend.Apart from the obvious shrinkage of the area in 2012, the scale of oasis has been basically in the state of expansion, and the largest oasis area was 1 359.51 km^2 in 2007. ② During 1987-1992, 1992-1999, 1999-2002,2002-2007, 2007-2012, 2012-2017, the land cover type changed was 500.99 km^2, 510.66 km^2, 625.70 km^2,611.67 km^2, 672.38 km^2 and 514.66 km^2, was mainly the conversion among cultivated land, desert and grassland.③The degree of water resource exploitation and utilization plays a decisive role in the evolution of oasis. Secondly, the change of population will affect the evolution of artificial oasis(crop land and urban land).【Conclusion】During 1987-2017, Minqin oasis has been gradually expanding, population growth was conducive to the expansion of artificial oasis area, but the degree of water resources development and utilization was still the main important factor leading to the overall evolution of oasis.
作者
刁维杰
赵勇
翟家齐
何凡
隋炳江
朱永楠
DIAOWeijie;ZHAO Yong;ZHAI Jiaqi;HE Fan;SUI Bingjiang;ZHU Yongnan(The State Key Laboratory of Simulation and Regulations of Water Cycles in River Basins,China Institute of Water Resources and Hydropower Research,Beijing 100038,China;Qiangkuang reservoir administration of Zhucheng,Weifang 262202,China)
出处
《灌溉排水学报》
CSCD
北大核心
2019年第10期106-113,共8页
Journal of Irrigation and Drainage
基金
国家水资源承载力评价与战略配置项目(2016YFC0401300)
国家重点研发计划项目(2016YFC0401407)
国家自然科学基金项目(51379216)
中国水科院创新团队项目(WR0145B622017)
