| This article has been：Browse 2192Times Download 2770Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.20190028 |
|
| Temporal Spatial Evolution and Driving Force Analysis of Minqin Oasis during 1987—2017 |
|
DIAO Weijie, ZHAO Yong, ZHAI Jiaqi, HE Fan, SUI Bingjiang, ZHU Yongnan
|
|
1. 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; 2. Qiangkuang reservoir administration of Zhucheng, Weifang 262202, China
|
| Abstract: |
| 【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 are adopted, analyse 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., the largest oasis area was 1 359.51 km2 in 2007. ②During 1987—1992,1992—1999,1999—2002,2002—2007,2007—2012,2012—2017, the land cover type changed was 500.99 km2,510.66 km2,625.70 km2,611.67 km2,672.38 km2 and 514.66 km2, 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. |
| Key words: Minqin oasis; landsat; spatial evolution; driving force |
|
|
