湿地景观演变与土地利用强度变化的响应关系——以银川平原为例

The map analysis of wetland landscape evolution with land use intensity change response in Yinchuan Plain

针对传统的湿地景观演变动态监测成果缺少空间分布特征和驱动力认知的可视化表达的问题,该文以银川平原为研究区,利用1989、1999和2010年3年的卫星遥感影像,通过遥感制图和基于半方差函数地统计学方法、灰色关联度理论等,分别获取了湿地景观演变规律图谱、土地利用强度演变规律图谱和湿地景观变化与土地利用强度变化响应关系图谱。基于以上图谱分析得到:1989—2010年期间,自然湿地(主要是河流湿地、湖泊湿地)面积持续减少,减少幅度有所降低;人工湿地(主要是水稻田湿地)面积大幅增加,湿地总面积呈增长趋势;土地利用方式对湿地景观变化影响显著,人类活动(城市扩张、农事活动)对湿地景观的演变起到潜移默化的作用。

Aiming at the problem that traditional dynamic monitoring results of wetland landscape evo- lution lack spatial distribution characteristics and visual expression of the driving force, taking Yinchuan Plain as study area, through remote sensing mapping and geo-statistics based on semi-variance, grey corre- lation theory, the wetland landscape evolution map, evolution laws of land use intensity map, wetland landscape evolution and land use intensity response relation map were acquired by the satellite remote sens- ing images of 1989, 1999 and 2010. The analysis results of the above maps showed that in the period of 1989-2010, natural wetland area was continuing to decline（mainly including river wetland and Lake Wet- land）, but the amplitude of decline was reducing l artificial wetland area was greatly increased（rice paddies wetlands mostly） ~ land use ways on wetland landscape changed significantly~ the evolution of human activ- ities（like urban expansion, farming activities, etc）on the wetland landscape had the effect of osmosis.